1 /* ELF executable support for BFD.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
29 BFD support for ELF formats is being worked on.
30 Currently, the best supported back ends are for sparc and i386
31 (running svr4 or Solaris 2).
33 Documentation of the internals of the support code still needs
34 to be written. The code is changing quickly enough that we
35 haven't bothered yet. */
37 /* For sparc64-cross-sparc32. */
45 #include "libiberty.h"
46 #include "safe-ctype.h"
48 static int elf_sort_sections (const void *, const void *);
49 static bfd_boolean assign_file_positions_except_relocs (bfd *, struct bfd_link_info *);
50 static bfd_boolean prep_headers (bfd *);
51 static bfd_boolean swap_out_syms (bfd *, struct bfd_strtab_hash **, int) ;
52 static bfd_boolean elf_read_notes (bfd *, file_ptr, bfd_size_type) ;
53 static bfd_boolean elf_parse_notes (bfd *abfd, char *buf, size_t size,
56 /* Swap version information in and out. The version information is
57 currently size independent. If that ever changes, this code will
58 need to move into elfcode.h. */
60 /* Swap in a Verdef structure. */
63 _bfd_elf_swap_verdef_in (bfd *abfd,
64 const Elf_External_Verdef *src,
65 Elf_Internal_Verdef *dst)
67 dst->vd_version = H_GET_16 (abfd, src->vd_version);
68 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
69 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
70 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
71 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
72 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
73 dst->vd_next = H_GET_32 (abfd, src->vd_next);
76 /* Swap out a Verdef structure. */
79 _bfd_elf_swap_verdef_out (bfd *abfd,
80 const Elf_Internal_Verdef *src,
81 Elf_External_Verdef *dst)
83 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
84 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
85 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
86 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
87 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
88 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
89 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
92 /* Swap in a Verdaux structure. */
95 _bfd_elf_swap_verdaux_in (bfd *abfd,
96 const Elf_External_Verdaux *src,
97 Elf_Internal_Verdaux *dst)
99 dst->vda_name = H_GET_32 (abfd, src->vda_name);
100 dst->vda_next = H_GET_32 (abfd, src->vda_next);
103 /* Swap out a Verdaux structure. */
106 _bfd_elf_swap_verdaux_out (bfd *abfd,
107 const Elf_Internal_Verdaux *src,
108 Elf_External_Verdaux *dst)
110 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
111 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
114 /* Swap in a Verneed structure. */
117 _bfd_elf_swap_verneed_in (bfd *abfd,
118 const Elf_External_Verneed *src,
119 Elf_Internal_Verneed *dst)
121 dst->vn_version = H_GET_16 (abfd, src->vn_version);
122 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
123 dst->vn_file = H_GET_32 (abfd, src->vn_file);
124 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
125 dst->vn_next = H_GET_32 (abfd, src->vn_next);
128 /* Swap out a Verneed structure. */
131 _bfd_elf_swap_verneed_out (bfd *abfd,
132 const Elf_Internal_Verneed *src,
133 Elf_External_Verneed *dst)
135 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
136 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
137 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
138 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
139 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
142 /* Swap in a Vernaux structure. */
145 _bfd_elf_swap_vernaux_in (bfd *abfd,
146 const Elf_External_Vernaux *src,
147 Elf_Internal_Vernaux *dst)
149 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
150 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
151 dst->vna_other = H_GET_16 (abfd, src->vna_other);
152 dst->vna_name = H_GET_32 (abfd, src->vna_name);
153 dst->vna_next = H_GET_32 (abfd, src->vna_next);
156 /* Swap out a Vernaux structure. */
159 _bfd_elf_swap_vernaux_out (bfd *abfd,
160 const Elf_Internal_Vernaux *src,
161 Elf_External_Vernaux *dst)
163 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
164 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
165 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
166 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
167 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
170 /* Swap in a Versym structure. */
173 _bfd_elf_swap_versym_in (bfd *abfd,
174 const Elf_External_Versym *src,
175 Elf_Internal_Versym *dst)
177 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
180 /* Swap out a Versym structure. */
183 _bfd_elf_swap_versym_out (bfd *abfd,
184 const Elf_Internal_Versym *src,
185 Elf_External_Versym *dst)
187 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
190 /* Standard ELF hash function. Do not change this function; you will
191 cause invalid hash tables to be generated. */
194 bfd_elf_hash (const char *namearg)
196 const unsigned char *name = (const unsigned char *) namearg;
201 while ((ch = *name++) != '\0')
204 if ((g = (h & 0xf0000000)) != 0)
207 /* The ELF ABI says `h &= ~g', but this is equivalent in
208 this case and on some machines one insn instead of two. */
212 return h & 0xffffffff;
215 /* DT_GNU_HASH hash function. Do not change this function; you will
216 cause invalid hash tables to be generated. */
219 bfd_elf_gnu_hash (const char *namearg)
221 const unsigned char *name = (const unsigned char *) namearg;
222 unsigned long h = 5381;
225 while ((ch = *name++) != '\0')
226 h = (h << 5) + h + ch;
227 return h & 0xffffffff;
230 /* Create a tdata field OBJECT_SIZE bytes in length, zeroed out and with
231 the object_id field of an elf_obj_tdata field set to OBJECT_ID. */
233 bfd_elf_allocate_object (bfd *abfd,
235 enum elf_target_id object_id)
237 BFD_ASSERT (object_size >= sizeof (struct elf_obj_tdata));
238 abfd->tdata.any = bfd_zalloc (abfd, object_size);
239 if (abfd->tdata.any == NULL)
242 elf_object_id (abfd) = object_id;
243 elf_program_header_size (abfd) = (bfd_size_type) -1;
249 bfd_elf_make_generic_object (bfd *abfd)
251 return bfd_elf_allocate_object (abfd, sizeof (struct elf_obj_tdata),
256 bfd_elf_mkcorefile (bfd *abfd)
258 /* I think this can be done just like an object file. */
259 return bfd_elf_make_generic_object (abfd);
263 bfd_elf_get_str_section (bfd *abfd, unsigned int shindex)
265 Elf_Internal_Shdr **i_shdrp;
266 bfd_byte *shstrtab = NULL;
268 bfd_size_type shstrtabsize;
270 i_shdrp = elf_elfsections (abfd);
272 || shindex >= elf_numsections (abfd)
273 || i_shdrp[shindex] == 0)
276 shstrtab = i_shdrp[shindex]->contents;
277 if (shstrtab == NULL)
279 /* No cached one, attempt to read, and cache what we read. */
280 offset = i_shdrp[shindex]->sh_offset;
281 shstrtabsize = i_shdrp[shindex]->sh_size;
283 /* Allocate and clear an extra byte at the end, to prevent crashes
284 in case the string table is not terminated. */
285 if (shstrtabsize + 1 <= 1
286 || (shstrtab = (bfd_byte *) bfd_alloc (abfd, shstrtabsize + 1)) == NULL
287 || bfd_seek (abfd, offset, SEEK_SET) != 0)
289 else if (bfd_bread (shstrtab, shstrtabsize, abfd) != shstrtabsize)
291 if (bfd_get_error () != bfd_error_system_call)
292 bfd_set_error (bfd_error_file_truncated);
294 /* Once we've failed to read it, make sure we don't keep
295 trying. Otherwise, we'll keep allocating space for
296 the string table over and over. */
297 i_shdrp[shindex]->sh_size = 0;
300 shstrtab[shstrtabsize] = '\0';
301 i_shdrp[shindex]->contents = shstrtab;
303 return (char *) shstrtab;
307 bfd_elf_string_from_elf_section (bfd *abfd,
308 unsigned int shindex,
309 unsigned int strindex)
311 Elf_Internal_Shdr *hdr;
316 if (elf_elfsections (abfd) == NULL || shindex >= elf_numsections (abfd))
319 hdr = elf_elfsections (abfd)[shindex];
321 if (hdr->contents == NULL
322 && bfd_elf_get_str_section (abfd, shindex) == NULL)
325 if (strindex >= hdr->sh_size)
327 unsigned int shstrndx = elf_elfheader(abfd)->e_shstrndx;
328 (*_bfd_error_handler)
329 (_("%B: invalid string offset %u >= %lu for section `%s'"),
330 abfd, strindex, (unsigned long) hdr->sh_size,
331 (shindex == shstrndx && strindex == hdr->sh_name
333 : bfd_elf_string_from_elf_section (abfd, shstrndx, hdr->sh_name)));
337 return ((char *) hdr->contents) + strindex;
340 /* Read and convert symbols to internal format.
341 SYMCOUNT specifies the number of symbols to read, starting from
342 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
343 are non-NULL, they are used to store the internal symbols, external
344 symbols, and symbol section index extensions, respectively.
345 Returns a pointer to the internal symbol buffer (malloced if necessary)
346 or NULL if there were no symbols or some kind of problem. */
349 bfd_elf_get_elf_syms (bfd *ibfd,
350 Elf_Internal_Shdr *symtab_hdr,
353 Elf_Internal_Sym *intsym_buf,
355 Elf_External_Sym_Shndx *extshndx_buf)
357 Elf_Internal_Shdr *shndx_hdr;
359 const bfd_byte *esym;
360 Elf_External_Sym_Shndx *alloc_extshndx;
361 Elf_External_Sym_Shndx *shndx;
362 Elf_Internal_Sym *alloc_intsym;
363 Elf_Internal_Sym *isym;
364 Elf_Internal_Sym *isymend;
365 const struct elf_backend_data *bed;
370 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
376 /* Normal syms might have section extension entries. */
378 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr)
379 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr;
381 /* Read the symbols. */
383 alloc_extshndx = NULL;
385 bed = get_elf_backend_data (ibfd);
386 extsym_size = bed->s->sizeof_sym;
387 amt = symcount * extsym_size;
388 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
389 if (extsym_buf == NULL)
391 alloc_ext = bfd_malloc2 (symcount, extsym_size);
392 extsym_buf = alloc_ext;
394 if (extsym_buf == NULL
395 || bfd_seek (ibfd, pos, SEEK_SET) != 0
396 || bfd_bread (extsym_buf, amt, ibfd) != amt)
402 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
406 amt = symcount * sizeof (Elf_External_Sym_Shndx);
407 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
408 if (extshndx_buf == NULL)
410 alloc_extshndx = (Elf_External_Sym_Shndx *)
411 bfd_malloc2 (symcount, sizeof (Elf_External_Sym_Shndx));
412 extshndx_buf = alloc_extshndx;
414 if (extshndx_buf == NULL
415 || bfd_seek (ibfd, pos, SEEK_SET) != 0
416 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
423 if (intsym_buf == NULL)
425 alloc_intsym = (Elf_Internal_Sym *)
426 bfd_malloc2 (symcount, sizeof (Elf_Internal_Sym));
427 intsym_buf = alloc_intsym;
428 if (intsym_buf == NULL)
432 /* Convert the symbols to internal form. */
433 isymend = intsym_buf + symcount;
434 for (esym = (const bfd_byte *) extsym_buf, isym = intsym_buf,
435 shndx = extshndx_buf;
437 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
438 if (!(*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym))
440 symoffset += (esym - (bfd_byte *) extsym_buf) / extsym_size;
441 (*_bfd_error_handler) (_("%B symbol number %lu references "
442 "nonexistent SHT_SYMTAB_SHNDX section"),
443 ibfd, (unsigned long) symoffset);
444 if (alloc_intsym != NULL)
451 if (alloc_ext != NULL)
453 if (alloc_extshndx != NULL)
454 free (alloc_extshndx);
459 /* Look up a symbol name. */
461 bfd_elf_sym_name (bfd *abfd,
462 Elf_Internal_Shdr *symtab_hdr,
463 Elf_Internal_Sym *isym,
467 unsigned int iname = isym->st_name;
468 unsigned int shindex = symtab_hdr->sh_link;
470 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
471 /* Check for a bogus st_shndx to avoid crashing. */
472 && isym->st_shndx < elf_numsections (abfd))
474 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
475 shindex = elf_elfheader (abfd)->e_shstrndx;
478 name = bfd_elf_string_from_elf_section (abfd, shindex, iname);
481 else if (sym_sec && *name == '\0')
482 name = bfd_section_name (abfd, sym_sec);
487 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
488 sections. The first element is the flags, the rest are section
491 typedef union elf_internal_group {
492 Elf_Internal_Shdr *shdr;
494 } Elf_Internal_Group;
496 /* Return the name of the group signature symbol. Why isn't the
497 signature just a string? */
500 group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
502 Elf_Internal_Shdr *hdr;
503 unsigned char esym[sizeof (Elf64_External_Sym)];
504 Elf_External_Sym_Shndx eshndx;
505 Elf_Internal_Sym isym;
507 /* First we need to ensure the symbol table is available. Make sure
508 that it is a symbol table section. */
509 if (ghdr->sh_link >= elf_numsections (abfd))
511 hdr = elf_elfsections (abfd) [ghdr->sh_link];
512 if (hdr->sh_type != SHT_SYMTAB
513 || ! bfd_section_from_shdr (abfd, ghdr->sh_link))
516 /* Go read the symbol. */
517 hdr = &elf_tdata (abfd)->symtab_hdr;
518 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
519 &isym, esym, &eshndx) == NULL)
522 return bfd_elf_sym_name (abfd, hdr, &isym, NULL);
525 /* Set next_in_group list pointer, and group name for NEWSECT. */
528 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
530 unsigned int num_group = elf_tdata (abfd)->num_group;
532 /* If num_group is zero, read in all SHT_GROUP sections. The count
533 is set to -1 if there are no SHT_GROUP sections. */
536 unsigned int i, shnum;
538 /* First count the number of groups. If we have a SHT_GROUP
539 section with just a flag word (ie. sh_size is 4), ignore it. */
540 shnum = elf_numsections (abfd);
543 #define IS_VALID_GROUP_SECTION_HEADER(shdr) \
544 ( (shdr)->sh_type == SHT_GROUP \
545 && (shdr)->sh_size >= (2 * GRP_ENTRY_SIZE) \
546 && (shdr)->sh_entsize == GRP_ENTRY_SIZE \
547 && ((shdr)->sh_size % GRP_ENTRY_SIZE) == 0)
549 for (i = 0; i < shnum; i++)
551 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
553 if (IS_VALID_GROUP_SECTION_HEADER (shdr))
559 num_group = (unsigned) -1;
560 elf_tdata (abfd)->num_group = num_group;
564 /* We keep a list of elf section headers for group sections,
565 so we can find them quickly. */
568 elf_tdata (abfd)->num_group = num_group;
569 elf_tdata (abfd)->group_sect_ptr = (Elf_Internal_Shdr **)
570 bfd_alloc2 (abfd, num_group, sizeof (Elf_Internal_Shdr *));
571 if (elf_tdata (abfd)->group_sect_ptr == NULL)
575 for (i = 0; i < shnum; i++)
577 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
579 if (IS_VALID_GROUP_SECTION_HEADER (shdr))
582 Elf_Internal_Group *dest;
584 /* Add to list of sections. */
585 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
588 /* Read the raw contents. */
589 BFD_ASSERT (sizeof (*dest) >= 4);
590 amt = shdr->sh_size * sizeof (*dest) / 4;
591 shdr->contents = (unsigned char *)
592 bfd_alloc2 (abfd, shdr->sh_size, sizeof (*dest) / 4);
593 /* PR binutils/4110: Handle corrupt group headers. */
594 if (shdr->contents == NULL)
597 (_("%B: Corrupt size field in group section header: 0x%lx"), abfd, shdr->sh_size);
598 bfd_set_error (bfd_error_bad_value);
602 memset (shdr->contents, 0, amt);
604 if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
605 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
609 /* Translate raw contents, a flag word followed by an
610 array of elf section indices all in target byte order,
611 to the flag word followed by an array of elf section
613 src = shdr->contents + shdr->sh_size;
614 dest = (Elf_Internal_Group *) (shdr->contents + amt);
621 idx = H_GET_32 (abfd, src);
622 if (src == shdr->contents)
625 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
626 shdr->bfd_section->flags
627 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
632 ((*_bfd_error_handler)
633 (_("%B: invalid SHT_GROUP entry"), abfd));
636 dest->shdr = elf_elfsections (abfd)[idx];
643 if (num_group != (unsigned) -1)
647 for (i = 0; i < num_group; i++)
649 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
650 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
651 unsigned int n_elt = shdr->sh_size / 4;
653 /* Look through this group's sections to see if current
654 section is a member. */
656 if ((++idx)->shdr == hdr)
660 /* We are a member of this group. Go looking through
661 other members to see if any others are linked via
663 idx = (Elf_Internal_Group *) shdr->contents;
664 n_elt = shdr->sh_size / 4;
666 if ((s = (++idx)->shdr->bfd_section) != NULL
667 && elf_next_in_group (s) != NULL)
671 /* Snarf the group name from other member, and
672 insert current section in circular list. */
673 elf_group_name (newsect) = elf_group_name (s);
674 elf_next_in_group (newsect) = elf_next_in_group (s);
675 elf_next_in_group (s) = newsect;
681 gname = group_signature (abfd, shdr);
684 elf_group_name (newsect) = gname;
686 /* Start a circular list with one element. */
687 elf_next_in_group (newsect) = newsect;
690 /* If the group section has been created, point to the
692 if (shdr->bfd_section != NULL)
693 elf_next_in_group (shdr->bfd_section) = newsect;
701 if (elf_group_name (newsect) == NULL)
703 (*_bfd_error_handler) (_("%B: no group info for section %A"),
710 _bfd_elf_setup_sections (bfd *abfd)
713 unsigned int num_group = elf_tdata (abfd)->num_group;
714 bfd_boolean result = TRUE;
717 /* Process SHF_LINK_ORDER. */
718 for (s = abfd->sections; s != NULL; s = s->next)
720 Elf_Internal_Shdr *this_hdr = &elf_section_data (s)->this_hdr;
721 if ((this_hdr->sh_flags & SHF_LINK_ORDER) != 0)
723 unsigned int elfsec = this_hdr->sh_link;
724 /* FIXME: The old Intel compiler and old strip/objcopy may
725 not set the sh_link or sh_info fields. Hence we could
726 get the situation where elfsec is 0. */
729 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
730 if (bed->link_order_error_handler)
731 bed->link_order_error_handler
732 (_("%B: warning: sh_link not set for section `%A'"),
737 asection *linksec = NULL;
739 if (elfsec < elf_numsections (abfd))
741 this_hdr = elf_elfsections (abfd)[elfsec];
742 linksec = this_hdr->bfd_section;
746 Some strip/objcopy may leave an incorrect value in
747 sh_link. We don't want to proceed. */
750 (*_bfd_error_handler)
751 (_("%B: sh_link [%d] in section `%A' is incorrect"),
752 s->owner, s, elfsec);
756 elf_linked_to_section (s) = linksec;
761 /* Process section groups. */
762 if (num_group == (unsigned) -1)
765 for (i = 0; i < num_group; i++)
767 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
768 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
769 unsigned int n_elt = shdr->sh_size / 4;
772 if ((++idx)->shdr->bfd_section)
773 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
774 else if (idx->shdr->sh_type == SHT_RELA
775 || idx->shdr->sh_type == SHT_REL)
776 /* We won't include relocation sections in section groups in
777 output object files. We adjust the group section size here
778 so that relocatable link will work correctly when
779 relocation sections are in section group in input object
781 shdr->bfd_section->size -= 4;
784 /* There are some unknown sections in the group. */
785 (*_bfd_error_handler)
786 (_("%B: unknown [%d] section `%s' in group [%s]"),
788 (unsigned int) idx->shdr->sh_type,
789 bfd_elf_string_from_elf_section (abfd,
790 (elf_elfheader (abfd)
793 shdr->bfd_section->name);
801 bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
803 return elf_next_in_group (sec) != NULL;
806 /* Make a BFD section from an ELF section. We store a pointer to the
807 BFD section in the bfd_section field of the header. */
810 _bfd_elf_make_section_from_shdr (bfd *abfd,
811 Elf_Internal_Shdr *hdr,
817 const struct elf_backend_data *bed;
819 if (hdr->bfd_section != NULL)
821 BFD_ASSERT (strcmp (name,
822 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
826 newsect = bfd_make_section_anyway (abfd, name);
830 hdr->bfd_section = newsect;
831 elf_section_data (newsect)->this_hdr = *hdr;
832 elf_section_data (newsect)->this_idx = shindex;
834 /* Always use the real type/flags. */
835 elf_section_type (newsect) = hdr->sh_type;
836 elf_section_flags (newsect) = hdr->sh_flags;
838 newsect->filepos = hdr->sh_offset;
840 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
841 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
842 || ! bfd_set_section_alignment (abfd, newsect,
843 bfd_log2 (hdr->sh_addralign)))
846 flags = SEC_NO_FLAGS;
847 if (hdr->sh_type != SHT_NOBITS)
848 flags |= SEC_HAS_CONTENTS;
849 if (hdr->sh_type == SHT_GROUP)
850 flags |= SEC_GROUP | SEC_EXCLUDE;
851 if ((hdr->sh_flags & SHF_ALLOC) != 0)
854 if (hdr->sh_type != SHT_NOBITS)
857 if ((hdr->sh_flags & SHF_WRITE) == 0)
858 flags |= SEC_READONLY;
859 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
861 else if ((flags & SEC_LOAD) != 0)
863 if ((hdr->sh_flags & SHF_MERGE) != 0)
866 newsect->entsize = hdr->sh_entsize;
867 if ((hdr->sh_flags & SHF_STRINGS) != 0)
868 flags |= SEC_STRINGS;
870 if (hdr->sh_flags & SHF_GROUP)
871 if (!setup_group (abfd, hdr, newsect))
873 if ((hdr->sh_flags & SHF_TLS) != 0)
874 flags |= SEC_THREAD_LOCAL;
876 if ((flags & SEC_ALLOC) == 0)
878 /* The debugging sections appear to be recognized only by name,
879 not any sort of flag. Their SEC_ALLOC bits are cleared. */
884 } debug_sections [] =
886 { STRING_COMMA_LEN ("debug") }, /* 'd' */
887 { NULL, 0 }, /* 'e' */
888 { NULL, 0 }, /* 'f' */
889 { STRING_COMMA_LEN ("gnu.linkonce.wi.") }, /* 'g' */
890 { NULL, 0 }, /* 'h' */
891 { NULL, 0 }, /* 'i' */
892 { NULL, 0 }, /* 'j' */
893 { NULL, 0 }, /* 'k' */
894 { STRING_COMMA_LEN ("line") }, /* 'l' */
895 { NULL, 0 }, /* 'm' */
896 { NULL, 0 }, /* 'n' */
897 { NULL, 0 }, /* 'o' */
898 { NULL, 0 }, /* 'p' */
899 { NULL, 0 }, /* 'q' */
900 { NULL, 0 }, /* 'r' */
901 { STRING_COMMA_LEN ("stab") }, /* 's' */
902 { NULL, 0 }, /* 't' */
903 { NULL, 0 }, /* 'u' */
904 { NULL, 0 }, /* 'v' */
905 { NULL, 0 }, /* 'w' */
906 { NULL, 0 }, /* 'x' */
907 { NULL, 0 }, /* 'y' */
908 { STRING_COMMA_LEN ("zdebug") } /* 'z' */
913 int i = name [1] - 'd';
915 && i < (int) ARRAY_SIZE (debug_sections)
916 && debug_sections [i].name != NULL
917 && strncmp (&name [1], debug_sections [i].name,
918 debug_sections [i].len) == 0)
919 flags |= SEC_DEBUGGING;
923 /* As a GNU extension, if the name begins with .gnu.linkonce, we
924 only link a single copy of the section. This is used to support
925 g++. g++ will emit each template expansion in its own section.
926 The symbols will be defined as weak, so that multiple definitions
927 are permitted. The GNU linker extension is to actually discard
928 all but one of the sections. */
929 if (CONST_STRNEQ (name, ".gnu.linkonce")
930 && elf_next_in_group (newsect) == NULL)
931 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
933 bed = get_elf_backend_data (abfd);
934 if (bed->elf_backend_section_flags)
935 if (! bed->elf_backend_section_flags (&flags, hdr))
938 if (! bfd_set_section_flags (abfd, newsect, flags))
941 /* We do not parse the PT_NOTE segments as we are interested even in the
942 separate debug info files which may have the segments offsets corrupted.
943 PT_NOTEs from the core files are currently not parsed using BFD. */
944 if (hdr->sh_type == SHT_NOTE)
948 if (!bfd_malloc_and_get_section (abfd, newsect, &contents))
951 elf_parse_notes (abfd, (char *) contents, hdr->sh_size, -1);
955 if ((flags & SEC_ALLOC) != 0)
957 Elf_Internal_Phdr *phdr;
958 unsigned int i, nload;
960 /* Some ELF linkers produce binaries with all the program header
961 p_paddr fields zero. If we have such a binary with more than
962 one PT_LOAD header, then leave the section lma equal to vma
963 so that we don't create sections with overlapping lma. */
964 phdr = elf_tdata (abfd)->phdr;
965 for (nload = 0, i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
966 if (phdr->p_paddr != 0)
968 else if (phdr->p_type == PT_LOAD && phdr->p_memsz != 0)
970 if (i >= elf_elfheader (abfd)->e_phnum && nload > 1)
973 phdr = elf_tdata (abfd)->phdr;
974 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
976 if (phdr->p_type == PT_LOAD
977 && ELF_IS_SECTION_IN_SEGMENT (hdr, phdr))
979 if ((flags & SEC_LOAD) == 0)
980 newsect->lma = (phdr->p_paddr
981 + hdr->sh_addr - phdr->p_vaddr);
983 /* We used to use the same adjustment for SEC_LOAD
984 sections, but that doesn't work if the segment
985 is packed with code from multiple VMAs.
986 Instead we calculate the section LMA based on
987 the segment LMA. It is assumed that the
988 segment will contain sections with contiguous
989 LMAs, even if the VMAs are not. */
990 newsect->lma = (phdr->p_paddr
991 + hdr->sh_offset - phdr->p_offset);
993 /* With contiguous segments, we can't tell from file
994 offsets whether a section with zero size should
995 be placed at the end of one segment or the
996 beginning of the next. Decide based on vaddr. */
997 if (hdr->sh_addr >= phdr->p_vaddr
998 && (hdr->sh_addr + hdr->sh_size
999 <= phdr->p_vaddr + phdr->p_memsz))
1008 const char *const bfd_elf_section_type_names[] = {
1009 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
1010 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
1011 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
1014 /* ELF relocs are against symbols. If we are producing relocatable
1015 output, and the reloc is against an external symbol, and nothing
1016 has given us any additional addend, the resulting reloc will also
1017 be against the same symbol. In such a case, we don't want to
1018 change anything about the way the reloc is handled, since it will
1019 all be done at final link time. Rather than put special case code
1020 into bfd_perform_relocation, all the reloc types use this howto
1021 function. It just short circuits the reloc if producing
1022 relocatable output against an external symbol. */
1024 bfd_reloc_status_type
1025 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1026 arelent *reloc_entry,
1028 void *data ATTRIBUTE_UNUSED,
1029 asection *input_section,
1031 char **error_message ATTRIBUTE_UNUSED)
1033 if (output_bfd != NULL
1034 && (symbol->flags & BSF_SECTION_SYM) == 0
1035 && (! reloc_entry->howto->partial_inplace
1036 || reloc_entry->addend == 0))
1038 reloc_entry->address += input_section->output_offset;
1039 return bfd_reloc_ok;
1042 return bfd_reloc_continue;
1045 /* Copy the program header and other data from one object module to
1049 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
1051 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1052 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1055 BFD_ASSERT (!elf_flags_init (obfd)
1056 || (elf_elfheader (obfd)->e_flags
1057 == elf_elfheader (ibfd)->e_flags));
1059 elf_gp (obfd) = elf_gp (ibfd);
1060 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1061 elf_flags_init (obfd) = TRUE;
1063 /* Copy object attributes. */
1064 _bfd_elf_copy_obj_attributes (ibfd, obfd);
1069 get_segment_type (unsigned int p_type)
1074 case PT_NULL: pt = "NULL"; break;
1075 case PT_LOAD: pt = "LOAD"; break;
1076 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1077 case PT_INTERP: pt = "INTERP"; break;
1078 case PT_NOTE: pt = "NOTE"; break;
1079 case PT_SHLIB: pt = "SHLIB"; break;
1080 case PT_PHDR: pt = "PHDR"; break;
1081 case PT_TLS: pt = "TLS"; break;
1082 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1083 case PT_GNU_STACK: pt = "STACK"; break;
1084 case PT_GNU_RELRO: pt = "RELRO"; break;
1085 default: pt = NULL; break;
1090 /* Print out the program headers. */
1093 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1095 FILE *f = (FILE *) farg;
1096 Elf_Internal_Phdr *p;
1098 bfd_byte *dynbuf = NULL;
1100 p = elf_tdata (abfd)->phdr;
1105 fprintf (f, _("\nProgram Header:\n"));
1106 c = elf_elfheader (abfd)->e_phnum;
1107 for (i = 0; i < c; i++, p++)
1109 const char *pt = get_segment_type (p->p_type);
1114 sprintf (buf, "0x%lx", p->p_type);
1117 fprintf (f, "%8s off 0x", pt);
1118 bfd_fprintf_vma (abfd, f, p->p_offset);
1119 fprintf (f, " vaddr 0x");
1120 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1121 fprintf (f, " paddr 0x");
1122 bfd_fprintf_vma (abfd, f, p->p_paddr);
1123 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1124 fprintf (f, " filesz 0x");
1125 bfd_fprintf_vma (abfd, f, p->p_filesz);
1126 fprintf (f, " memsz 0x");
1127 bfd_fprintf_vma (abfd, f, p->p_memsz);
1128 fprintf (f, " flags %c%c%c",
1129 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1130 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1131 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1132 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1133 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1138 s = bfd_get_section_by_name (abfd, ".dynamic");
1141 unsigned int elfsec;
1142 unsigned long shlink;
1143 bfd_byte *extdyn, *extdynend;
1145 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1147 fprintf (f, _("\nDynamic Section:\n"));
1149 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1152 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1153 if (elfsec == SHN_BAD)
1155 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1157 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1158 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1161 extdynend = extdyn + s->size;
1162 for (; extdyn < extdynend; extdyn += extdynsize)
1164 Elf_Internal_Dyn dyn;
1165 const char *name = "";
1167 bfd_boolean stringp;
1168 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1170 (*swap_dyn_in) (abfd, extdyn, &dyn);
1172 if (dyn.d_tag == DT_NULL)
1179 if (bed->elf_backend_get_target_dtag)
1180 name = (*bed->elf_backend_get_target_dtag) (dyn.d_tag);
1182 if (!strcmp (name, ""))
1184 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1189 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1190 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1191 case DT_PLTGOT: name = "PLTGOT"; break;
1192 case DT_HASH: name = "HASH"; break;
1193 case DT_STRTAB: name = "STRTAB"; break;
1194 case DT_SYMTAB: name = "SYMTAB"; break;
1195 case DT_RELA: name = "RELA"; break;
1196 case DT_RELASZ: name = "RELASZ"; break;
1197 case DT_RELAENT: name = "RELAENT"; break;
1198 case DT_STRSZ: name = "STRSZ"; break;
1199 case DT_SYMENT: name = "SYMENT"; break;
1200 case DT_INIT: name = "INIT"; break;
1201 case DT_FINI: name = "FINI"; break;
1202 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1203 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1204 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1205 case DT_REL: name = "REL"; break;
1206 case DT_RELSZ: name = "RELSZ"; break;
1207 case DT_RELENT: name = "RELENT"; break;
1208 case DT_PLTREL: name = "PLTREL"; break;
1209 case DT_DEBUG: name = "DEBUG"; break;
1210 case DT_TEXTREL: name = "TEXTREL"; break;
1211 case DT_JMPREL: name = "JMPREL"; break;
1212 case DT_BIND_NOW: name = "BIND_NOW"; break;
1213 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1214 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1215 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1216 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1217 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1218 case DT_FLAGS: name = "FLAGS"; break;
1219 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1220 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1221 case DT_CHECKSUM: name = "CHECKSUM"; break;
1222 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1223 case DT_MOVEENT: name = "MOVEENT"; break;
1224 case DT_MOVESZ: name = "MOVESZ"; break;
1225 case DT_FEATURE: name = "FEATURE"; break;
1226 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1227 case DT_SYMINSZ: name = "SYMINSZ"; break;
1228 case DT_SYMINENT: name = "SYMINENT"; break;
1229 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1230 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1231 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1232 case DT_PLTPAD: name = "PLTPAD"; break;
1233 case DT_MOVETAB: name = "MOVETAB"; break;
1234 case DT_SYMINFO: name = "SYMINFO"; break;
1235 case DT_RELACOUNT: name = "RELACOUNT"; break;
1236 case DT_RELCOUNT: name = "RELCOUNT"; break;
1237 case DT_FLAGS_1: name = "FLAGS_1"; break;
1238 case DT_VERSYM: name = "VERSYM"; break;
1239 case DT_VERDEF: name = "VERDEF"; break;
1240 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1241 case DT_VERNEED: name = "VERNEED"; break;
1242 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1243 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1244 case DT_USED: name = "USED"; break;
1245 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1246 case DT_GNU_HASH: name = "GNU_HASH"; break;
1249 fprintf (f, " %-20s ", name);
1253 bfd_fprintf_vma (abfd, f, dyn.d_un.d_val);
1258 unsigned int tagv = dyn.d_un.d_val;
1260 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1263 fprintf (f, "%s", string);
1272 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1273 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1275 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1279 if (elf_dynverdef (abfd) != 0)
1281 Elf_Internal_Verdef *t;
1283 fprintf (f, _("\nVersion definitions:\n"));
1284 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1286 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1287 t->vd_flags, t->vd_hash,
1288 t->vd_nodename ? t->vd_nodename : "<corrupt>");
1289 if (t->vd_auxptr != NULL && t->vd_auxptr->vda_nextptr != NULL)
1291 Elf_Internal_Verdaux *a;
1294 for (a = t->vd_auxptr->vda_nextptr;
1298 a->vda_nodename ? a->vda_nodename : "<corrupt>");
1304 if (elf_dynverref (abfd) != 0)
1306 Elf_Internal_Verneed *t;
1308 fprintf (f, _("\nVersion References:\n"));
1309 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1311 Elf_Internal_Vernaux *a;
1313 fprintf (f, _(" required from %s:\n"),
1314 t->vn_filename ? t->vn_filename : "<corrupt>");
1315 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1316 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1317 a->vna_flags, a->vna_other,
1318 a->vna_nodename ? a->vna_nodename : "<corrupt>");
1330 /* Display ELF-specific fields of a symbol. */
1333 bfd_elf_print_symbol (bfd *abfd,
1336 bfd_print_symbol_type how)
1338 FILE *file = (FILE *) filep;
1341 case bfd_print_symbol_name:
1342 fprintf (file, "%s", symbol->name);
1344 case bfd_print_symbol_more:
1345 fprintf (file, "elf ");
1346 bfd_fprintf_vma (abfd, file, symbol->value);
1347 fprintf (file, " %lx", (unsigned long) symbol->flags);
1349 case bfd_print_symbol_all:
1351 const char *section_name;
1352 const char *name = NULL;
1353 const struct elf_backend_data *bed;
1354 unsigned char st_other;
1357 section_name = symbol->section ? symbol->section->name : "(*none*)";
1359 bed = get_elf_backend_data (abfd);
1360 if (bed->elf_backend_print_symbol_all)
1361 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1365 name = symbol->name;
1366 bfd_print_symbol_vandf (abfd, file, symbol);
1369 fprintf (file, " %s\t", section_name);
1370 /* Print the "other" value for a symbol. For common symbols,
1371 we've already printed the size; now print the alignment.
1372 For other symbols, we have no specified alignment, and
1373 we've printed the address; now print the size. */
1374 if (symbol->section && bfd_is_com_section (symbol->section))
1375 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1377 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1378 bfd_fprintf_vma (abfd, file, val);
1380 /* If we have version information, print it. */
1381 if (elf_tdata (abfd)->dynversym_section != 0
1382 && (elf_tdata (abfd)->dynverdef_section != 0
1383 || elf_tdata (abfd)->dynverref_section != 0))
1385 unsigned int vernum;
1386 const char *version_string;
1388 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1391 version_string = "";
1392 else if (vernum == 1)
1393 version_string = "Base";
1394 else if (vernum <= elf_tdata (abfd)->cverdefs)
1396 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1399 Elf_Internal_Verneed *t;
1401 version_string = "";
1402 for (t = elf_tdata (abfd)->verref;
1406 Elf_Internal_Vernaux *a;
1408 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1410 if (a->vna_other == vernum)
1412 version_string = a->vna_nodename;
1419 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1420 fprintf (file, " %-11s", version_string);
1425 fprintf (file, " (%s)", version_string);
1426 for (i = 10 - strlen (version_string); i > 0; --i)
1431 /* If the st_other field is not zero, print it. */
1432 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1437 case STV_INTERNAL: fprintf (file, " .internal"); break;
1438 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1439 case STV_PROTECTED: fprintf (file, " .protected"); break;
1441 /* Some other non-defined flags are also present, so print
1443 fprintf (file, " 0x%02x", (unsigned int) st_other);
1446 fprintf (file, " %s", name);
1452 /* Allocate an ELF string table--force the first byte to be zero. */
1454 struct bfd_strtab_hash *
1455 _bfd_elf_stringtab_init (void)
1457 struct bfd_strtab_hash *ret;
1459 ret = _bfd_stringtab_init ();
1464 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1465 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1466 if (loc == (bfd_size_type) -1)
1468 _bfd_stringtab_free (ret);
1475 /* ELF .o/exec file reading */
1477 /* Create a new bfd section from an ELF section header. */
1480 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1482 Elf_Internal_Shdr *hdr;
1483 Elf_Internal_Ehdr *ehdr;
1484 const struct elf_backend_data *bed;
1487 if (shindex >= elf_numsections (abfd))
1490 hdr = elf_elfsections (abfd)[shindex];
1491 ehdr = elf_elfheader (abfd);
1492 name = bfd_elf_string_from_elf_section (abfd, ehdr->e_shstrndx,
1497 bed = get_elf_backend_data (abfd);
1498 switch (hdr->sh_type)
1501 /* Inactive section. Throw it away. */
1504 case SHT_PROGBITS: /* Normal section with contents. */
1505 case SHT_NOBITS: /* .bss section. */
1506 case SHT_HASH: /* .hash section. */
1507 case SHT_NOTE: /* .note section. */
1508 case SHT_INIT_ARRAY: /* .init_array section. */
1509 case SHT_FINI_ARRAY: /* .fini_array section. */
1510 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1511 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
1512 case SHT_GNU_HASH: /* .gnu.hash section. */
1513 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1515 case SHT_DYNAMIC: /* Dynamic linking information. */
1516 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1518 if (hdr->sh_link > elf_numsections (abfd))
1520 /* PR 10478: Accept Solaris binaries with a sh_link
1521 field set to SHN_BEFORE or SHN_AFTER. */
1522 switch (bfd_get_arch (abfd))
1525 case bfd_arch_sparc:
1526 if (hdr->sh_link == (SHN_LORESERVE & 0xffff) /* SHN_BEFORE */
1527 || hdr->sh_link == ((SHN_LORESERVE + 1) & 0xffff) /* SHN_AFTER */)
1529 /* Otherwise fall through. */
1534 else if (elf_elfsections (abfd)[hdr->sh_link] == NULL)
1536 else if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1538 Elf_Internal_Shdr *dynsymhdr;
1540 /* The shared libraries distributed with hpux11 have a bogus
1541 sh_link field for the ".dynamic" section. Find the
1542 string table for the ".dynsym" section instead. */
1543 if (elf_dynsymtab (abfd) != 0)
1545 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1546 hdr->sh_link = dynsymhdr->sh_link;
1550 unsigned int i, num_sec;
1552 num_sec = elf_numsections (abfd);
1553 for (i = 1; i < num_sec; i++)
1555 dynsymhdr = elf_elfsections (abfd)[i];
1556 if (dynsymhdr->sh_type == SHT_DYNSYM)
1558 hdr->sh_link = dynsymhdr->sh_link;
1566 case SHT_SYMTAB: /* A symbol table */
1567 if (elf_onesymtab (abfd) == shindex)
1570 if (hdr->sh_entsize != bed->s->sizeof_sym)
1572 if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size)
1574 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1575 elf_onesymtab (abfd) = shindex;
1576 elf_tdata (abfd)->symtab_hdr = *hdr;
1577 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1578 abfd->flags |= HAS_SYMS;
1580 /* Sometimes a shared object will map in the symbol table. If
1581 SHF_ALLOC is set, and this is a shared object, then we also
1582 treat this section as a BFD section. We can not base the
1583 decision purely on SHF_ALLOC, because that flag is sometimes
1584 set in a relocatable object file, which would confuse the
1586 if ((hdr->sh_flags & SHF_ALLOC) != 0
1587 && (abfd->flags & DYNAMIC) != 0
1588 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1592 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1593 can't read symbols without that section loaded as well. It
1594 is most likely specified by the next section header. */
1595 if (elf_elfsections (abfd)[elf_symtab_shndx (abfd)]->sh_link != shindex)
1597 unsigned int i, num_sec;
1599 num_sec = elf_numsections (abfd);
1600 for (i = shindex + 1; i < num_sec; i++)
1602 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1603 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1604 && hdr2->sh_link == shindex)
1608 for (i = 1; i < shindex; i++)
1610 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1611 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1612 && hdr2->sh_link == shindex)
1616 return bfd_section_from_shdr (abfd, i);
1620 case SHT_DYNSYM: /* A dynamic symbol table */
1621 if (elf_dynsymtab (abfd) == shindex)
1624 if (hdr->sh_entsize != bed->s->sizeof_sym)
1626 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1627 elf_dynsymtab (abfd) = shindex;
1628 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1629 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1630 abfd->flags |= HAS_SYMS;
1632 /* Besides being a symbol table, we also treat this as a regular
1633 section, so that objcopy can handle it. */
1634 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1636 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1637 if (elf_symtab_shndx (abfd) == shindex)
1640 BFD_ASSERT (elf_symtab_shndx (abfd) == 0);
1641 elf_symtab_shndx (abfd) = shindex;
1642 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1643 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1646 case SHT_STRTAB: /* A string table */
1647 if (hdr->bfd_section != NULL)
1649 if (ehdr->e_shstrndx == shindex)
1651 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1652 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1655 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
1658 elf_tdata (abfd)->strtab_hdr = *hdr;
1659 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
1662 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
1665 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1666 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
1667 elf_elfsections (abfd)[shindex] = hdr;
1668 /* We also treat this as a regular section, so that objcopy
1670 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1674 /* If the string table isn't one of the above, then treat it as a
1675 regular section. We need to scan all the headers to be sure,
1676 just in case this strtab section appeared before the above. */
1677 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
1679 unsigned int i, num_sec;
1681 num_sec = elf_numsections (abfd);
1682 for (i = 1; i < num_sec; i++)
1684 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1685 if (hdr2->sh_link == shindex)
1687 /* Prevent endless recursion on broken objects. */
1690 if (! bfd_section_from_shdr (abfd, i))
1692 if (elf_onesymtab (abfd) == i)
1694 if (elf_dynsymtab (abfd) == i)
1695 goto dynsymtab_strtab;
1699 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1703 /* *These* do a lot of work -- but build no sections! */
1705 asection *target_sect;
1706 Elf_Internal_Shdr *hdr2;
1707 unsigned int num_sec = elf_numsections (abfd);
1710 != (bfd_size_type) (hdr->sh_type == SHT_REL
1711 ? bed->s->sizeof_rel : bed->s->sizeof_rela))
1714 /* Check for a bogus link to avoid crashing. */
1715 if (hdr->sh_link >= num_sec)
1717 ((*_bfd_error_handler)
1718 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1719 abfd, hdr->sh_link, name, shindex));
1720 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1724 /* For some incomprehensible reason Oracle distributes
1725 libraries for Solaris in which some of the objects have
1726 bogus sh_link fields. It would be nice if we could just
1727 reject them, but, unfortunately, some people need to use
1728 them. We scan through the section headers; if we find only
1729 one suitable symbol table, we clobber the sh_link to point
1730 to it. I hope this doesn't break anything.
1732 Don't do it on executable nor shared library. */
1733 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0
1734 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1735 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1741 for (scan = 1; scan < num_sec; scan++)
1743 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1744 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1755 hdr->sh_link = found;
1758 /* Get the symbol table. */
1759 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1760 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
1761 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1764 /* If this reloc section does not use the main symbol table we
1765 don't treat it as a reloc section. BFD can't adequately
1766 represent such a section, so at least for now, we don't
1767 try. We just present it as a normal section. We also
1768 can't use it as a reloc section if it points to the null
1769 section, an invalid section, another reloc section, or its
1770 sh_link points to the null section. */
1771 if (hdr->sh_link != elf_onesymtab (abfd)
1772 || hdr->sh_link == SHN_UNDEF
1773 || hdr->sh_info == SHN_UNDEF
1774 || hdr->sh_info >= num_sec
1775 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL
1776 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_RELA)
1777 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1780 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1782 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1783 if (target_sect == NULL)
1786 if ((target_sect->flags & SEC_RELOC) == 0
1787 || target_sect->reloc_count == 0)
1788 hdr2 = &elf_section_data (target_sect)->rel_hdr;
1792 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
1793 amt = sizeof (*hdr2);
1794 hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt);
1797 elf_section_data (target_sect)->rel_hdr2 = hdr2;
1800 elf_elfsections (abfd)[shindex] = hdr2;
1801 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
1802 target_sect->flags |= SEC_RELOC;
1803 target_sect->relocation = NULL;
1804 target_sect->rel_filepos = hdr->sh_offset;
1805 /* In the section to which the relocations apply, mark whether
1806 its relocations are of the REL or RELA variety. */
1807 if (hdr->sh_size != 0)
1808 target_sect->use_rela_p = hdr->sh_type == SHT_RELA;
1809 abfd->flags |= HAS_RELOC;
1813 case SHT_GNU_verdef:
1814 elf_dynverdef (abfd) = shindex;
1815 elf_tdata (abfd)->dynverdef_hdr = *hdr;
1816 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1818 case SHT_GNU_versym:
1819 if (hdr->sh_entsize != sizeof (Elf_External_Versym))
1821 elf_dynversym (abfd) = shindex;
1822 elf_tdata (abfd)->dynversym_hdr = *hdr;
1823 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1825 case SHT_GNU_verneed:
1826 elf_dynverref (abfd) = shindex;
1827 elf_tdata (abfd)->dynverref_hdr = *hdr;
1828 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1834 if (! IS_VALID_GROUP_SECTION_HEADER (hdr))
1836 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1838 if (hdr->contents != NULL)
1840 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
1841 unsigned int n_elt = hdr->sh_size / GRP_ENTRY_SIZE;
1844 if (idx->flags & GRP_COMDAT)
1845 hdr->bfd_section->flags
1846 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
1848 /* We try to keep the same section order as it comes in. */
1850 while (--n_elt != 0)
1854 if (idx->shdr != NULL
1855 && (s = idx->shdr->bfd_section) != NULL
1856 && elf_next_in_group (s) != NULL)
1858 elf_next_in_group (hdr->bfd_section) = s;
1866 /* Possibly an attributes section. */
1867 if (hdr->sh_type == SHT_GNU_ATTRIBUTES
1868 || hdr->sh_type == bed->obj_attrs_section_type)
1870 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1872 _bfd_elf_parse_attributes (abfd, hdr);
1876 /* Check for any processor-specific section types. */
1877 if (bed->elf_backend_section_from_shdr (abfd, hdr, name, shindex))
1880 if (hdr->sh_type >= SHT_LOUSER && hdr->sh_type <= SHT_HIUSER)
1882 if ((hdr->sh_flags & SHF_ALLOC) != 0)
1883 /* FIXME: How to properly handle allocated section reserved
1884 for applications? */
1885 (*_bfd_error_handler)
1886 (_("%B: don't know how to handle allocated, application "
1887 "specific section `%s' [0x%8x]"),
1888 abfd, name, hdr->sh_type);
1890 /* Allow sections reserved for applications. */
1891 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1894 else if (hdr->sh_type >= SHT_LOPROC
1895 && hdr->sh_type <= SHT_HIPROC)
1896 /* FIXME: We should handle this section. */
1897 (*_bfd_error_handler)
1898 (_("%B: don't know how to handle processor specific section "
1900 abfd, name, hdr->sh_type);
1901 else if (hdr->sh_type >= SHT_LOOS && hdr->sh_type <= SHT_HIOS)
1903 /* Unrecognised OS-specific sections. */
1904 if ((hdr->sh_flags & SHF_OS_NONCONFORMING) != 0)
1905 /* SHF_OS_NONCONFORMING indicates that special knowledge is
1906 required to correctly process the section and the file should
1907 be rejected with an error message. */
1908 (*_bfd_error_handler)
1909 (_("%B: don't know how to handle OS specific section "
1911 abfd, name, hdr->sh_type);
1913 /* Otherwise it should be processed. */
1914 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1917 /* FIXME: We should handle this section. */
1918 (*_bfd_error_handler)
1919 (_("%B: don't know how to handle section `%s' [0x%8x]"),
1920 abfd, name, hdr->sh_type);
1928 /* Return the local symbol specified by ABFD, R_SYMNDX. */
1931 bfd_sym_from_r_symndx (struct sym_cache *cache,
1933 unsigned long r_symndx)
1935 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
1937 if (cache->abfd != abfd || cache->indx[ent] != r_symndx)
1939 Elf_Internal_Shdr *symtab_hdr;
1940 unsigned char esym[sizeof (Elf64_External_Sym)];
1941 Elf_External_Sym_Shndx eshndx;
1943 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1944 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
1945 &cache->sym[ent], esym, &eshndx) == NULL)
1948 if (cache->abfd != abfd)
1950 memset (cache->indx, -1, sizeof (cache->indx));
1953 cache->indx[ent] = r_symndx;
1956 return &cache->sym[ent];
1959 /* Given an ELF section number, retrieve the corresponding BFD
1963 bfd_section_from_elf_index (bfd *abfd, unsigned int sec_index)
1965 if (sec_index >= elf_numsections (abfd))
1967 return elf_elfsections (abfd)[sec_index]->bfd_section;
1970 static const struct bfd_elf_special_section special_sections_b[] =
1972 { STRING_COMMA_LEN (".bss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1973 { NULL, 0, 0, 0, 0 }
1976 static const struct bfd_elf_special_section special_sections_c[] =
1978 { STRING_COMMA_LEN (".comment"), 0, SHT_PROGBITS, 0 },
1979 { NULL, 0, 0, 0, 0 }
1982 static const struct bfd_elf_special_section special_sections_d[] =
1984 { STRING_COMMA_LEN (".data"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1985 { STRING_COMMA_LEN (".data1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1986 { STRING_COMMA_LEN (".debug"), 0, SHT_PROGBITS, 0 },
1987 { STRING_COMMA_LEN (".debug_line"), 0, SHT_PROGBITS, 0 },
1988 { STRING_COMMA_LEN (".debug_info"), 0, SHT_PROGBITS, 0 },
1989 { STRING_COMMA_LEN (".debug_abbrev"), 0, SHT_PROGBITS, 0 },
1990 { STRING_COMMA_LEN (".debug_aranges"), 0, SHT_PROGBITS, 0 },
1991 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, SHF_ALLOC },
1992 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, SHF_ALLOC },
1993 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, SHF_ALLOC },
1994 { NULL, 0, 0, 0, 0 }
1997 static const struct bfd_elf_special_section special_sections_f[] =
1999 { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2000 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2001 { NULL, 0, 0, 0, 0 }
2004 static const struct bfd_elf_special_section special_sections_g[] =
2006 { STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2007 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2008 { STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym, 0 },
2009 { STRING_COMMA_LEN (".gnu.version_d"), 0, SHT_GNU_verdef, 0 },
2010 { STRING_COMMA_LEN (".gnu.version_r"), 0, SHT_GNU_verneed, 0 },
2011 { STRING_COMMA_LEN (".gnu.liblist"), 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2012 { STRING_COMMA_LEN (".gnu.conflict"), 0, SHT_RELA, SHF_ALLOC },
2013 { STRING_COMMA_LEN (".gnu.hash"), 0, SHT_GNU_HASH, SHF_ALLOC },
2014 { NULL, 0, 0, 0, 0 }
2017 static const struct bfd_elf_special_section special_sections_h[] =
2019 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, SHF_ALLOC },
2020 { NULL, 0, 0, 0, 0 }
2023 static const struct bfd_elf_special_section special_sections_i[] =
2025 { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2026 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2027 { STRING_COMMA_LEN (".interp"), 0, SHT_PROGBITS, 0 },
2028 { NULL, 0, 0, 0, 0 }
2031 static const struct bfd_elf_special_section special_sections_l[] =
2033 { STRING_COMMA_LEN (".line"), 0, SHT_PROGBITS, 0 },
2034 { NULL, 0, 0, 0, 0 }
2037 static const struct bfd_elf_special_section special_sections_n[] =
2039 { STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS, 0 },
2040 { STRING_COMMA_LEN (".note"), -1, SHT_NOTE, 0 },
2041 { NULL, 0, 0, 0, 0 }
2044 static const struct bfd_elf_special_section special_sections_p[] =
2046 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2047 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2048 { NULL, 0, 0, 0, 0 }
2051 static const struct bfd_elf_special_section special_sections_r[] =
2053 { STRING_COMMA_LEN (".rodata"), -2, SHT_PROGBITS, SHF_ALLOC },
2054 { STRING_COMMA_LEN (".rodata1"), 0, SHT_PROGBITS, SHF_ALLOC },
2055 { STRING_COMMA_LEN (".rela"), -1, SHT_RELA, 0 },
2056 { STRING_COMMA_LEN (".rel"), -1, SHT_REL, 0 },
2057 { NULL, 0, 0, 0, 0 }
2060 static const struct bfd_elf_special_section special_sections_s[] =
2062 { STRING_COMMA_LEN (".shstrtab"), 0, SHT_STRTAB, 0 },
2063 { STRING_COMMA_LEN (".strtab"), 0, SHT_STRTAB, 0 },
2064 { STRING_COMMA_LEN (".symtab"), 0, SHT_SYMTAB, 0 },
2065 /* See struct bfd_elf_special_section declaration for the semantics of
2066 this special case where .prefix_length != strlen (.prefix). */
2067 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2068 { NULL, 0, 0, 0, 0 }
2071 static const struct bfd_elf_special_section special_sections_t[] =
2073 { STRING_COMMA_LEN (".text"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2074 { STRING_COMMA_LEN (".tbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2075 { STRING_COMMA_LEN (".tdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2076 { NULL, 0, 0, 0, 0 }
2079 static const struct bfd_elf_special_section special_sections_z[] =
2081 { STRING_COMMA_LEN (".zdebug_line"), 0, SHT_PROGBITS, 0 },
2082 { STRING_COMMA_LEN (".zdebug_info"), 0, SHT_PROGBITS, 0 },
2083 { STRING_COMMA_LEN (".zdebug_abbrev"), 0, SHT_PROGBITS, 0 },
2084 { STRING_COMMA_LEN (".zdebug_aranges"), 0, SHT_PROGBITS, 0 },
2085 { NULL, 0, 0, 0, 0 }
2088 static const struct bfd_elf_special_section *special_sections[] =
2090 special_sections_b, /* 'b' */
2091 special_sections_c, /* 'c' */
2092 special_sections_d, /* 'd' */
2094 special_sections_f, /* 'f' */
2095 special_sections_g, /* 'g' */
2096 special_sections_h, /* 'h' */
2097 special_sections_i, /* 'i' */
2100 special_sections_l, /* 'l' */
2102 special_sections_n, /* 'n' */
2104 special_sections_p, /* 'p' */
2106 special_sections_r, /* 'r' */
2107 special_sections_s, /* 's' */
2108 special_sections_t, /* 't' */
2114 special_sections_z /* 'z' */
2117 const struct bfd_elf_special_section *
2118 _bfd_elf_get_special_section (const char *name,
2119 const struct bfd_elf_special_section *spec,
2125 len = strlen (name);
2127 for (i = 0; spec[i].prefix != NULL; i++)
2130 int prefix_len = spec[i].prefix_length;
2132 if (len < prefix_len)
2134 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2137 suffix_len = spec[i].suffix_length;
2138 if (suffix_len <= 0)
2140 if (name[prefix_len] != 0)
2142 if (suffix_len == 0)
2144 if (name[prefix_len] != '.'
2145 && (suffix_len == -2
2146 || (rela && spec[i].type == SHT_REL)))
2152 if (len < prefix_len + suffix_len)
2154 if (memcmp (name + len - suffix_len,
2155 spec[i].prefix + prefix_len,
2165 const struct bfd_elf_special_section *
2166 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2169 const struct bfd_elf_special_section *spec;
2170 const struct elf_backend_data *bed;
2172 /* See if this is one of the special sections. */
2173 if (sec->name == NULL)
2176 bed = get_elf_backend_data (abfd);
2177 spec = bed->special_sections;
2180 spec = _bfd_elf_get_special_section (sec->name,
2181 bed->special_sections,
2187 if (sec->name[0] != '.')
2190 i = sec->name[1] - 'b';
2191 if (i < 0 || i > 'z' - 'b')
2194 spec = special_sections[i];
2199 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2203 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2205 struct bfd_elf_section_data *sdata;
2206 const struct elf_backend_data *bed;
2207 const struct bfd_elf_special_section *ssect;
2209 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2212 sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd,
2216 sec->used_by_bfd = sdata;
2219 /* Indicate whether or not this section should use RELA relocations. */
2220 bed = get_elf_backend_data (abfd);
2221 sec->use_rela_p = bed->default_use_rela_p;
2223 /* When we read a file, we don't need to set ELF section type and
2224 flags. They will be overridden in _bfd_elf_make_section_from_shdr
2225 anyway. We will set ELF section type and flags for all linker
2226 created sections. If user specifies BFD section flags, we will
2227 set ELF section type and flags based on BFD section flags in
2228 elf_fake_sections. */
2229 if ((!sec->flags && abfd->direction != read_direction)
2230 || (sec->flags & SEC_LINKER_CREATED) != 0)
2232 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2235 elf_section_type (sec) = ssect->type;
2236 elf_section_flags (sec) = ssect->attr;
2240 return _bfd_generic_new_section_hook (abfd, sec);
2243 /* Create a new bfd section from an ELF program header.
2245 Since program segments have no names, we generate a synthetic name
2246 of the form segment<NUM>, where NUM is generally the index in the
2247 program header table. For segments that are split (see below) we
2248 generate the names segment<NUM>a and segment<NUM>b.
2250 Note that some program segments may have a file size that is different than
2251 (less than) the memory size. All this means is that at execution the
2252 system must allocate the amount of memory specified by the memory size,
2253 but only initialize it with the first "file size" bytes read from the
2254 file. This would occur for example, with program segments consisting
2255 of combined data+bss.
2257 To handle the above situation, this routine generates TWO bfd sections
2258 for the single program segment. The first has the length specified by
2259 the file size of the segment, and the second has the length specified
2260 by the difference between the two sizes. In effect, the segment is split
2261 into its initialized and uninitialized parts.
2266 _bfd_elf_make_section_from_phdr (bfd *abfd,
2267 Elf_Internal_Phdr *hdr,
2269 const char *type_name)
2277 split = ((hdr->p_memsz > 0)
2278 && (hdr->p_filesz > 0)
2279 && (hdr->p_memsz > hdr->p_filesz));
2281 if (hdr->p_filesz > 0)
2283 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "a" : "");
2284 len = strlen (namebuf) + 1;
2285 name = (char *) bfd_alloc (abfd, len);
2288 memcpy (name, namebuf, len);
2289 newsect = bfd_make_section (abfd, name);
2290 if (newsect == NULL)
2292 newsect->vma = hdr->p_vaddr;
2293 newsect->lma = hdr->p_paddr;
2294 newsect->size = hdr->p_filesz;
2295 newsect->filepos = hdr->p_offset;
2296 newsect->flags |= SEC_HAS_CONTENTS;
2297 newsect->alignment_power = bfd_log2 (hdr->p_align);
2298 if (hdr->p_type == PT_LOAD)
2300 newsect->flags |= SEC_ALLOC;
2301 newsect->flags |= SEC_LOAD;
2302 if (hdr->p_flags & PF_X)
2304 /* FIXME: all we known is that it has execute PERMISSION,
2306 newsect->flags |= SEC_CODE;
2309 if (!(hdr->p_flags & PF_W))
2311 newsect->flags |= SEC_READONLY;
2315 if (hdr->p_memsz > hdr->p_filesz)
2319 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "b" : "");
2320 len = strlen (namebuf) + 1;
2321 name = (char *) bfd_alloc (abfd, len);
2324 memcpy (name, namebuf, len);
2325 newsect = bfd_make_section (abfd, name);
2326 if (newsect == NULL)
2328 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2329 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2330 newsect->size = hdr->p_memsz - hdr->p_filesz;
2331 newsect->filepos = hdr->p_offset + hdr->p_filesz;
2332 align = newsect->vma & -newsect->vma;
2333 if (align == 0 || align > hdr->p_align)
2334 align = hdr->p_align;
2335 newsect->alignment_power = bfd_log2 (align);
2336 if (hdr->p_type == PT_LOAD)
2338 /* Hack for gdb. Segments that have not been modified do
2339 not have their contents written to a core file, on the
2340 assumption that a debugger can find the contents in the
2341 executable. We flag this case by setting the fake
2342 section size to zero. Note that "real" bss sections will
2343 always have their contents dumped to the core file. */
2344 if (bfd_get_format (abfd) == bfd_core)
2346 newsect->flags |= SEC_ALLOC;
2347 if (hdr->p_flags & PF_X)
2348 newsect->flags |= SEC_CODE;
2350 if (!(hdr->p_flags & PF_W))
2351 newsect->flags |= SEC_READONLY;
2358 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int hdr_index)
2360 const struct elf_backend_data *bed;
2362 switch (hdr->p_type)
2365 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "null");
2368 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "load");
2371 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "dynamic");
2374 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "interp");
2377 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "note"))
2379 if (! elf_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2384 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "shlib");
2387 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "phdr");
2389 case PT_GNU_EH_FRAME:
2390 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index,
2394 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "stack");
2397 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "relro");
2400 /* Check for any processor-specific program segment types. */
2401 bed = get_elf_backend_data (abfd);
2402 return bed->elf_backend_section_from_phdr (abfd, hdr, hdr_index, "proc");
2406 /* Initialize REL_HDR, the section-header for new section, containing
2407 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2408 relocations; otherwise, we use REL relocations. */
2411 _bfd_elf_init_reloc_shdr (bfd *abfd,
2412 Elf_Internal_Shdr *rel_hdr,
2414 bfd_boolean use_rela_p)
2417 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2418 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2420 name = (char *) bfd_alloc (abfd, amt);
2423 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2425 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2427 if (rel_hdr->sh_name == (unsigned int) -1)
2429 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2430 rel_hdr->sh_entsize = (use_rela_p
2431 ? bed->s->sizeof_rela
2432 : bed->s->sizeof_rel);
2433 rel_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
2434 rel_hdr->sh_flags = 0;
2435 rel_hdr->sh_addr = 0;
2436 rel_hdr->sh_size = 0;
2437 rel_hdr->sh_offset = 0;
2442 /* Return the default section type based on the passed in section flags. */
2445 bfd_elf_get_default_section_type (flagword flags)
2447 if ((flags & SEC_ALLOC) != 0
2448 && ((flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0
2449 || (flags & SEC_NEVER_LOAD) != 0))
2451 return SHT_PROGBITS;
2454 /* Set up an ELF internal section header for a section. */
2457 elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg)
2459 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2460 bfd_boolean *failedptr = (bfd_boolean *) failedptrarg;
2461 Elf_Internal_Shdr *this_hdr;
2462 unsigned int sh_type;
2466 /* We already failed; just get out of the bfd_map_over_sections
2471 this_hdr = &elf_section_data (asect)->this_hdr;
2473 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2474 asect->name, FALSE);
2475 if (this_hdr->sh_name == (unsigned int) -1)
2481 /* Don't clear sh_flags. Assembler may set additional bits. */
2483 if ((asect->flags & SEC_ALLOC) != 0
2484 || asect->user_set_vma)
2485 this_hdr->sh_addr = asect->vma;
2487 this_hdr->sh_addr = 0;
2489 this_hdr->sh_offset = 0;
2490 this_hdr->sh_size = asect->size;
2491 this_hdr->sh_link = 0;
2492 this_hdr->sh_addralign = (bfd_vma) 1 << asect->alignment_power;
2493 /* The sh_entsize and sh_info fields may have been set already by
2494 copy_private_section_data. */
2496 this_hdr->bfd_section = asect;
2497 this_hdr->contents = NULL;
2499 /* If the section type is unspecified, we set it based on
2501 if ((asect->flags & SEC_GROUP) != 0)
2502 sh_type = SHT_GROUP;
2504 sh_type = bfd_elf_get_default_section_type (asect->flags);
2506 if (this_hdr->sh_type == SHT_NULL)
2507 this_hdr->sh_type = sh_type;
2508 else if (this_hdr->sh_type == SHT_NOBITS
2509 && sh_type == SHT_PROGBITS
2510 && (asect->flags & SEC_ALLOC) != 0)
2512 /* Warn if we are changing a NOBITS section to PROGBITS, but
2513 allow the link to proceed. This can happen when users link
2514 non-bss input sections to bss output sections, or emit data
2515 to a bss output section via a linker script. */
2516 (*_bfd_error_handler)
2517 (_("warning: section `%A' type changed to PROGBITS"), asect);
2518 this_hdr->sh_type = sh_type;
2521 switch (this_hdr->sh_type)
2527 case SHT_INIT_ARRAY:
2528 case SHT_FINI_ARRAY:
2529 case SHT_PREINIT_ARRAY:
2536 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2540 this_hdr->sh_entsize = bed->s->sizeof_sym;
2544 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2548 if (get_elf_backend_data (abfd)->may_use_rela_p)
2549 this_hdr->sh_entsize = bed->s->sizeof_rela;
2553 if (get_elf_backend_data (abfd)->may_use_rel_p)
2554 this_hdr->sh_entsize = bed->s->sizeof_rel;
2557 case SHT_GNU_versym:
2558 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2561 case SHT_GNU_verdef:
2562 this_hdr->sh_entsize = 0;
2563 /* objcopy or strip will copy over sh_info, but may not set
2564 cverdefs. The linker will set cverdefs, but sh_info will be
2566 if (this_hdr->sh_info == 0)
2567 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2569 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2570 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2573 case SHT_GNU_verneed:
2574 this_hdr->sh_entsize = 0;
2575 /* objcopy or strip will copy over sh_info, but may not set
2576 cverrefs. The linker will set cverrefs, but sh_info will be
2578 if (this_hdr->sh_info == 0)
2579 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2581 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2582 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2586 this_hdr->sh_entsize = GRP_ENTRY_SIZE;
2590 this_hdr->sh_entsize = bed->s->arch_size == 64 ? 0 : 4;
2594 if ((asect->flags & SEC_ALLOC) != 0)
2595 this_hdr->sh_flags |= SHF_ALLOC;
2596 if ((asect->flags & SEC_READONLY) == 0)
2597 this_hdr->sh_flags |= SHF_WRITE;
2598 if ((asect->flags & SEC_CODE) != 0)
2599 this_hdr->sh_flags |= SHF_EXECINSTR;
2600 if ((asect->flags & SEC_MERGE) != 0)
2602 this_hdr->sh_flags |= SHF_MERGE;
2603 this_hdr->sh_entsize = asect->entsize;
2604 if ((asect->flags & SEC_STRINGS) != 0)
2605 this_hdr->sh_flags |= SHF_STRINGS;
2607 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2608 this_hdr->sh_flags |= SHF_GROUP;
2609 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2611 this_hdr->sh_flags |= SHF_TLS;
2612 if (asect->size == 0
2613 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2615 struct bfd_link_order *o = asect->map_tail.link_order;
2617 this_hdr->sh_size = 0;
2620 this_hdr->sh_size = o->offset + o->size;
2621 if (this_hdr->sh_size != 0)
2622 this_hdr->sh_type = SHT_NOBITS;
2627 /* Check for processor-specific section types. */
2628 sh_type = this_hdr->sh_type;
2629 if (bed->elf_backend_fake_sections
2630 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2633 if (sh_type == SHT_NOBITS && asect->size != 0)
2635 /* Don't change the header type from NOBITS if we are being
2636 called for objcopy --only-keep-debug. */
2637 this_hdr->sh_type = sh_type;
2640 /* If the section has relocs, set up a section header for the
2641 SHT_REL[A] section. If two relocation sections are required for
2642 this section, it is up to the processor-specific back-end to
2643 create the other. */
2644 if ((asect->flags & SEC_RELOC) != 0
2645 && !_bfd_elf_init_reloc_shdr (abfd,
2646 &elf_section_data (asect)->rel_hdr,
2652 /* Fill in the contents of a SHT_GROUP section. Called from
2653 _bfd_elf_compute_section_file_positions for gas, objcopy, and
2654 when ELF targets use the generic linker, ld. Called for ld -r
2655 from bfd_elf_final_link. */
2658 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2660 bfd_boolean *failedptr = (bfd_boolean *) failedptrarg;
2661 asection *elt, *first;
2665 /* Ignore linker created group section. See elfNN_ia64_object_p in
2667 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2671 if (elf_section_data (sec)->this_hdr.sh_info == 0)
2673 unsigned long symindx = 0;
2675 /* elf_group_id will have been set up by objcopy and the
2677 if (elf_group_id (sec) != NULL)
2678 symindx = elf_group_id (sec)->udata.i;
2682 /* If called from the assembler, swap_out_syms will have set up
2683 elf_section_syms. */
2684 BFD_ASSERT (elf_section_syms (abfd) != NULL);
2685 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2687 elf_section_data (sec)->this_hdr.sh_info = symindx;
2689 else if (elf_section_data (sec)->this_hdr.sh_info == (unsigned int) -2)
2691 /* The ELF backend linker sets sh_info to -2 when the group
2692 signature symbol is global, and thus the index can't be
2693 set until all local symbols are output. */
2694 asection *igroup = elf_sec_group (elf_next_in_group (sec));
2695 struct bfd_elf_section_data *sec_data = elf_section_data (igroup);
2696 unsigned long symndx = sec_data->this_hdr.sh_info;
2697 unsigned long extsymoff = 0;
2698 struct elf_link_hash_entry *h;
2700 if (!elf_bad_symtab (igroup->owner))
2702 Elf_Internal_Shdr *symtab_hdr;
2704 symtab_hdr = &elf_tdata (igroup->owner)->symtab_hdr;
2705 extsymoff = symtab_hdr->sh_info;
2707 h = elf_sym_hashes (igroup->owner)[symndx - extsymoff];
2708 while (h->root.type == bfd_link_hash_indirect
2709 || h->root.type == bfd_link_hash_warning)
2710 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2712 elf_section_data (sec)->this_hdr.sh_info = h->indx;
2715 /* The contents won't be allocated for "ld -r" or objcopy. */
2717 if (sec->contents == NULL)
2720 sec->contents = (unsigned char *) bfd_alloc (abfd, sec->size);
2722 /* Arrange for the section to be written out. */
2723 elf_section_data (sec)->this_hdr.contents = sec->contents;
2724 if (sec->contents == NULL)
2731 loc = sec->contents + sec->size;
2733 /* Get the pointer to the first section in the group that gas
2734 squirreled away here. objcopy arranges for this to be set to the
2735 start of the input section group. */
2736 first = elt = elf_next_in_group (sec);
2738 /* First element is a flag word. Rest of section is elf section
2739 indices for all the sections of the group. Write them backwards
2740 just to keep the group in the same order as given in .section
2741 directives, not that it matters. */
2748 s = s->output_section;
2750 && !bfd_is_abs_section (s))
2752 unsigned int idx = elf_section_data (s)->this_idx;
2755 H_PUT_32 (abfd, idx, loc);
2757 elt = elf_next_in_group (elt);
2762 if ((loc -= 4) != sec->contents)
2765 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2768 /* Assign all ELF section numbers. The dummy first section is handled here
2769 too. The link/info pointers for the standard section types are filled
2770 in here too, while we're at it. */
2773 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
2775 struct elf_obj_tdata *t = elf_tdata (abfd);
2777 unsigned int section_number, secn;
2778 Elf_Internal_Shdr **i_shdrp;
2779 struct bfd_elf_section_data *d;
2780 bfd_boolean need_symtab;
2784 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2786 /* SHT_GROUP sections are in relocatable files only. */
2787 if (link_info == NULL || link_info->relocatable)
2789 /* Put SHT_GROUP sections first. */
2790 for (sec = abfd->sections; sec != NULL; sec = sec->next)
2792 d = elf_section_data (sec);
2794 if (d->this_hdr.sh_type == SHT_GROUP)
2796 if (sec->flags & SEC_LINKER_CREATED)
2798 /* Remove the linker created SHT_GROUP sections. */
2799 bfd_section_list_remove (abfd, sec);
2800 abfd->section_count--;
2803 d->this_idx = section_number++;
2808 for (sec = abfd->sections; sec; sec = sec->next)
2810 d = elf_section_data (sec);
2812 if (d->this_hdr.sh_type != SHT_GROUP)
2813 d->this_idx = section_number++;
2814 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2815 if ((sec->flags & SEC_RELOC) == 0)
2819 d->rel_idx = section_number++;
2820 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2825 d->rel_idx2 = section_number++;
2826 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2832 t->shstrtab_section = section_number++;
2833 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2834 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2836 need_symtab = (bfd_get_symcount (abfd) > 0
2837 || (link_info == NULL
2838 && ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
2842 t->symtab_section = section_number++;
2843 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2844 if (section_number > ((SHN_LORESERVE - 2) & 0xFFFF))
2846 t->symtab_shndx_section = section_number++;
2847 t->symtab_shndx_hdr.sh_name
2848 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2849 ".symtab_shndx", FALSE);
2850 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2853 t->strtab_section = section_number++;
2854 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2857 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2858 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2860 elf_numsections (abfd) = section_number;
2861 elf_elfheader (abfd)->e_shnum = section_number;
2863 /* Set up the list of section header pointers, in agreement with the
2865 i_shdrp = (Elf_Internal_Shdr **) bfd_zalloc2 (abfd, section_number,
2866 sizeof (Elf_Internal_Shdr *));
2867 if (i_shdrp == NULL)
2870 i_shdrp[0] = (Elf_Internal_Shdr *) bfd_zalloc (abfd,
2871 sizeof (Elf_Internal_Shdr));
2872 if (i_shdrp[0] == NULL)
2874 bfd_release (abfd, i_shdrp);
2878 elf_elfsections (abfd) = i_shdrp;
2880 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
2883 i_shdrp[t->symtab_section] = &t->symtab_hdr;
2884 if (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF))
2886 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
2887 t->symtab_shndx_hdr.sh_link = t->symtab_section;
2889 i_shdrp[t->strtab_section] = &t->strtab_hdr;
2890 t->symtab_hdr.sh_link = t->strtab_section;
2893 for (sec = abfd->sections; sec; sec = sec->next)
2898 d = elf_section_data (sec);
2900 i_shdrp[d->this_idx] = &d->this_hdr;
2901 if (d->rel_idx != 0)
2902 i_shdrp[d->rel_idx] = &d->rel_hdr;
2903 if (d->rel_idx2 != 0)
2904 i_shdrp[d->rel_idx2] = d->rel_hdr2;
2906 /* Fill in the sh_link and sh_info fields while we're at it. */
2908 /* sh_link of a reloc section is the section index of the symbol
2909 table. sh_info is the section index of the section to which
2910 the relocation entries apply. */
2911 if (d->rel_idx != 0)
2913 d->rel_hdr.sh_link = t->symtab_section;
2914 d->rel_hdr.sh_info = d->this_idx;
2916 if (d->rel_idx2 != 0)
2918 d->rel_hdr2->sh_link = t->symtab_section;
2919 d->rel_hdr2->sh_info = d->this_idx;
2922 /* We need to set up sh_link for SHF_LINK_ORDER. */
2923 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
2925 s = elf_linked_to_section (sec);
2928 /* elf_linked_to_section points to the input section. */
2929 if (link_info != NULL)
2931 /* Check discarded linkonce section. */
2932 if (elf_discarded_section (s))
2935 (*_bfd_error_handler)
2936 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
2937 abfd, d->this_hdr.bfd_section,
2939 /* Point to the kept section if it has the same
2940 size as the discarded one. */
2941 kept = _bfd_elf_check_kept_section (s, link_info);
2944 bfd_set_error (bfd_error_bad_value);
2950 s = s->output_section;
2951 BFD_ASSERT (s != NULL);
2955 /* Handle objcopy. */
2956 if (s->output_section == NULL)
2958 (*_bfd_error_handler)
2959 (_("%B: sh_link of section `%A' points to removed section `%A' of `%B'"),
2960 abfd, d->this_hdr.bfd_section, s, s->owner);
2961 bfd_set_error (bfd_error_bad_value);
2964 s = s->output_section;
2966 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2971 The Intel C compiler generates SHT_IA_64_UNWIND with
2972 SHF_LINK_ORDER. But it doesn't set the sh_link or
2973 sh_info fields. Hence we could get the situation
2975 const struct elf_backend_data *bed
2976 = get_elf_backend_data (abfd);
2977 if (bed->link_order_error_handler)
2978 bed->link_order_error_handler
2979 (_("%B: warning: sh_link not set for section `%A'"),
2984 switch (d->this_hdr.sh_type)
2988 /* A reloc section which we are treating as a normal BFD
2989 section. sh_link is the section index of the symbol
2990 table. sh_info is the section index of the section to
2991 which the relocation entries apply. We assume that an
2992 allocated reloc section uses the dynamic symbol table.
2993 FIXME: How can we be sure? */
2994 s = bfd_get_section_by_name (abfd, ".dynsym");
2996 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2998 /* We look up the section the relocs apply to by name. */
3000 if (d->this_hdr.sh_type == SHT_REL)
3004 s = bfd_get_section_by_name (abfd, name);
3006 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3010 /* We assume that a section named .stab*str is a stabs
3011 string section. We look for a section with the same name
3012 but without the trailing ``str'', and set its sh_link
3013 field to point to this section. */
3014 if (CONST_STRNEQ (sec->name, ".stab")
3015 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3020 len = strlen (sec->name);
3021 alc = (char *) bfd_malloc (len - 2);
3024 memcpy (alc, sec->name, len - 3);
3025 alc[len - 3] = '\0';
3026 s = bfd_get_section_by_name (abfd, alc);
3030 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3032 /* This is a .stab section. */
3033 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3034 elf_section_data (s)->this_hdr.sh_entsize
3035 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3042 case SHT_GNU_verneed:
3043 case SHT_GNU_verdef:
3044 /* sh_link is the section header index of the string table
3045 used for the dynamic entries, or the symbol table, or the
3047 s = bfd_get_section_by_name (abfd, ".dynstr");
3049 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3052 case SHT_GNU_LIBLIST:
3053 /* sh_link is the section header index of the prelink library
3054 list used for the dynamic entries, or the symbol table, or
3055 the version strings. */
3056 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3057 ? ".dynstr" : ".gnu.libstr");
3059 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3064 case SHT_GNU_versym:
3065 /* sh_link is the section header index of the symbol table
3066 this hash table or version table is for. */
3067 s = bfd_get_section_by_name (abfd, ".dynsym");
3069 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3073 d->this_hdr.sh_link = t->symtab_section;
3077 for (secn = 1; secn < section_number; ++secn)
3078 if (i_shdrp[secn] == NULL)
3079 i_shdrp[secn] = i_shdrp[0];
3081 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3082 i_shdrp[secn]->sh_name);
3086 /* Map symbol from it's internal number to the external number, moving
3087 all local symbols to be at the head of the list. */
3090 sym_is_global (bfd *abfd, asymbol *sym)
3092 /* If the backend has a special mapping, use it. */
3093 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3094 if (bed->elf_backend_sym_is_global)
3095 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3097 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK | BSF_GNU_UNIQUE)) != 0
3098 || bfd_is_und_section (bfd_get_section (sym))
3099 || bfd_is_com_section (bfd_get_section (sym)));
3102 /* Don't output section symbols for sections that are not going to be
3106 ignore_section_sym (bfd *abfd, asymbol *sym)
3108 return ((sym->flags & BSF_SECTION_SYM) != 0
3109 && !(sym->section->owner == abfd
3110 || (sym->section->output_section->owner == abfd
3111 && sym->section->output_offset == 0)));
3115 elf_map_symbols (bfd *abfd)
3117 unsigned int symcount = bfd_get_symcount (abfd);
3118 asymbol **syms = bfd_get_outsymbols (abfd);
3119 asymbol **sect_syms;
3120 unsigned int num_locals = 0;
3121 unsigned int num_globals = 0;
3122 unsigned int num_locals2 = 0;
3123 unsigned int num_globals2 = 0;
3130 fprintf (stderr, "elf_map_symbols\n");
3134 for (asect = abfd->sections; asect; asect = asect->next)
3136 if (max_index < asect->index)
3137 max_index = asect->index;
3141 sect_syms = (asymbol **) bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
3142 if (sect_syms == NULL)
3144 elf_section_syms (abfd) = sect_syms;
3145 elf_num_section_syms (abfd) = max_index;
3147 /* Init sect_syms entries for any section symbols we have already
3148 decided to output. */
3149 for (idx = 0; idx < symcount; idx++)
3151 asymbol *sym = syms[idx];
3153 if ((sym->flags & BSF_SECTION_SYM) != 0
3155 && !ignore_section_sym (abfd, sym))
3157 asection *sec = sym->section;
3159 if (sec->owner != abfd)
3160 sec = sec->output_section;
3162 sect_syms[sec->index] = syms[idx];
3166 /* Classify all of the symbols. */
3167 for (idx = 0; idx < symcount; idx++)
3169 if (ignore_section_sym (abfd, syms[idx]))
3171 if (!sym_is_global (abfd, syms[idx]))
3177 /* We will be adding a section symbol for each normal BFD section. Most
3178 sections will already have a section symbol in outsymbols, but
3179 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3180 at least in that case. */
3181 for (asect = abfd->sections; asect; asect = asect->next)
3183 if (sect_syms[asect->index] == NULL)
3185 if (!sym_is_global (abfd, asect->symbol))
3192 /* Now sort the symbols so the local symbols are first. */
3193 new_syms = (asymbol **) bfd_alloc2 (abfd, num_locals + num_globals,
3194 sizeof (asymbol *));
3196 if (new_syms == NULL)
3199 for (idx = 0; idx < symcount; idx++)
3201 asymbol *sym = syms[idx];
3204 if (ignore_section_sym (abfd, sym))
3206 if (!sym_is_global (abfd, sym))
3209 i = num_locals + num_globals2++;
3211 sym->udata.i = i + 1;
3213 for (asect = abfd->sections; asect; asect = asect->next)
3215 if (sect_syms[asect->index] == NULL)
3217 asymbol *sym = asect->symbol;
3220 sect_syms[asect->index] = sym;
3221 if (!sym_is_global (abfd, sym))
3224 i = num_locals + num_globals2++;
3226 sym->udata.i = i + 1;
3230 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3232 elf_num_locals (abfd) = num_locals;
3233 elf_num_globals (abfd) = num_globals;
3237 /* Align to the maximum file alignment that could be required for any
3238 ELF data structure. */
3240 static inline file_ptr
3241 align_file_position (file_ptr off, int align)
3243 return (off + align - 1) & ~(align - 1);
3246 /* Assign a file position to a section, optionally aligning to the
3247 required section alignment. */
3250 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3254 if (align && i_shdrp->sh_addralign > 1)
3255 offset = BFD_ALIGN (offset, i_shdrp->sh_addralign);
3256 i_shdrp->sh_offset = offset;
3257 if (i_shdrp->bfd_section != NULL)
3258 i_shdrp->bfd_section->filepos = offset;
3259 if (i_shdrp->sh_type != SHT_NOBITS)
3260 offset += i_shdrp->sh_size;
3264 /* Compute the file positions we are going to put the sections at, and
3265 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3266 is not NULL, this is being called by the ELF backend linker. */
3269 _bfd_elf_compute_section_file_positions (bfd *abfd,
3270 struct bfd_link_info *link_info)
3272 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3274 struct bfd_strtab_hash *strtab = NULL;
3275 Elf_Internal_Shdr *shstrtab_hdr;
3276 bfd_boolean need_symtab;
3278 if (abfd->output_has_begun)
3281 /* Do any elf backend specific processing first. */
3282 if (bed->elf_backend_begin_write_processing)
3283 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3285 if (! prep_headers (abfd))
3288 /* Post process the headers if necessary. */
3289 if (bed->elf_backend_post_process_headers)
3290 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3293 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3297 if (!assign_section_numbers (abfd, link_info))
3300 /* The backend linker builds symbol table information itself. */
3301 need_symtab = (link_info == NULL
3302 && (bfd_get_symcount (abfd) > 0
3303 || ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
3307 /* Non-zero if doing a relocatable link. */
3308 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3310 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3314 if (link_info == NULL)
3316 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3321 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3322 /* sh_name was set in prep_headers. */
3323 shstrtab_hdr->sh_type = SHT_STRTAB;
3324 shstrtab_hdr->sh_flags = 0;
3325 shstrtab_hdr->sh_addr = 0;
3326 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3327 shstrtab_hdr->sh_entsize = 0;
3328 shstrtab_hdr->sh_link = 0;
3329 shstrtab_hdr->sh_info = 0;
3330 /* sh_offset is set in assign_file_positions_except_relocs. */
3331 shstrtab_hdr->sh_addralign = 1;
3333 if (!assign_file_positions_except_relocs (abfd, link_info))
3339 Elf_Internal_Shdr *hdr;
3341 off = elf_tdata (abfd)->next_file_pos;
3343 hdr = &elf_tdata (abfd)->symtab_hdr;
3344 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3346 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3347 if (hdr->sh_size != 0)
3348 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3350 hdr = &elf_tdata (abfd)->strtab_hdr;
3351 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3353 elf_tdata (abfd)->next_file_pos = off;
3355 /* Now that we know where the .strtab section goes, write it
3357 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3358 || ! _bfd_stringtab_emit (abfd, strtab))
3360 _bfd_stringtab_free (strtab);
3363 abfd->output_has_begun = TRUE;
3368 /* Make an initial estimate of the size of the program header. If we
3369 get the number wrong here, we'll redo section placement. */
3371 static bfd_size_type
3372 get_program_header_size (bfd *abfd, struct bfd_link_info *info)
3376 const struct elf_backend_data *bed;
3378 /* Assume we will need exactly two PT_LOAD segments: one for text
3379 and one for data. */
3382 s = bfd_get_section_by_name (abfd, ".interp");
3383 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3385 /* If we have a loadable interpreter section, we need a
3386 PT_INTERP segment. In this case, assume we also need a
3387 PT_PHDR segment, although that may not be true for all
3392 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
3394 /* We need a PT_DYNAMIC segment. */
3398 if (info != NULL && info->relro)
3400 /* We need a PT_GNU_RELRO segment. */
3404 if (elf_tdata (abfd)->eh_frame_hdr)
3406 /* We need a PT_GNU_EH_FRAME segment. */
3410 if (elf_tdata (abfd)->stack_flags)
3412 /* We need a PT_GNU_STACK segment. */
3416 for (s = abfd->sections; s != NULL; s = s->next)
3418 if ((s->flags & SEC_LOAD) != 0
3419 && CONST_STRNEQ (s->name, ".note"))
3421 /* We need a PT_NOTE segment. */
3423 /* Try to create just one PT_NOTE segment
3424 for all adjacent loadable .note* sections.
3425 gABI requires that within a PT_NOTE segment
3426 (and also inside of each SHT_NOTE section)
3427 each note is padded to a multiple of 4 size,
3428 so we check whether the sections are correctly
3430 if (s->alignment_power == 2)
3431 while (s->next != NULL
3432 && s->next->alignment_power == 2
3433 && (s->next->flags & SEC_LOAD) != 0
3434 && CONST_STRNEQ (s->next->name, ".note"))
3439 for (s = abfd->sections; s != NULL; s = s->next)
3441 if (s->flags & SEC_THREAD_LOCAL)
3443 /* We need a PT_TLS segment. */
3449 /* Let the backend count up any program headers it might need. */
3450 bed = get_elf_backend_data (abfd);
3451 if (bed->elf_backend_additional_program_headers)
3455 a = (*bed->elf_backend_additional_program_headers) (abfd, info);
3461 return segs * bed->s->sizeof_phdr;
3464 /* Find the segment that contains the output_section of section. */
3467 _bfd_elf_find_segment_containing_section (bfd * abfd, asection * section)
3469 struct elf_segment_map *m;
3470 Elf_Internal_Phdr *p;
3472 for (m = elf_tdata (abfd)->segment_map,
3473 p = elf_tdata (abfd)->phdr;
3479 for (i = m->count - 1; i >= 0; i--)
3480 if (m->sections[i] == section)
3487 /* Create a mapping from a set of sections to a program segment. */
3489 static struct elf_segment_map *
3490 make_mapping (bfd *abfd,
3491 asection **sections,
3496 struct elf_segment_map *m;
3501 amt = sizeof (struct elf_segment_map);
3502 amt += (to - from - 1) * sizeof (asection *);
3503 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3507 m->p_type = PT_LOAD;
3508 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3509 m->sections[i - from] = *hdrpp;
3510 m->count = to - from;
3512 if (from == 0 && phdr)
3514 /* Include the headers in the first PT_LOAD segment. */
3515 m->includes_filehdr = 1;
3516 m->includes_phdrs = 1;
3522 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3525 struct elf_segment_map *
3526 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3528 struct elf_segment_map *m;
3530 m = (struct elf_segment_map *) bfd_zalloc (abfd,
3531 sizeof (struct elf_segment_map));
3535 m->p_type = PT_DYNAMIC;
3537 m->sections[0] = dynsec;
3542 /* Possibly add or remove segments from the segment map. */
3545 elf_modify_segment_map (bfd *abfd,
3546 struct bfd_link_info *info,
3547 bfd_boolean remove_empty_load)
3549 struct elf_segment_map **m;
3550 const struct elf_backend_data *bed;
3552 /* The placement algorithm assumes that non allocated sections are
3553 not in PT_LOAD segments. We ensure this here by removing such
3554 sections from the segment map. We also remove excluded
3555 sections. Finally, any PT_LOAD segment without sections is
3557 m = &elf_tdata (abfd)->segment_map;
3560 unsigned int i, new_count;
3562 for (new_count = 0, i = 0; i < (*m)->count; i++)
3564 if (((*m)->sections[i]->flags & SEC_EXCLUDE) == 0
3565 && (((*m)->sections[i]->flags & SEC_ALLOC) != 0
3566 || (*m)->p_type != PT_LOAD))
3568 (*m)->sections[new_count] = (*m)->sections[i];
3572 (*m)->count = new_count;
3574 if (remove_empty_load && (*m)->p_type == PT_LOAD && (*m)->count == 0)
3580 bed = get_elf_backend_data (abfd);
3581 if (bed->elf_backend_modify_segment_map != NULL)
3583 if (!(*bed->elf_backend_modify_segment_map) (abfd, info))
3590 /* Set up a mapping from BFD sections to program segments. */
3593 _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
3596 struct elf_segment_map *m;
3597 asection **sections = NULL;
3598 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3599 bfd_boolean no_user_phdrs;
3601 no_user_phdrs = elf_tdata (abfd)->segment_map == NULL;
3602 if (no_user_phdrs && bfd_count_sections (abfd) != 0)
3606 struct elf_segment_map *mfirst;
3607 struct elf_segment_map **pm;
3610 unsigned int phdr_index;
3611 bfd_vma maxpagesize;
3613 bfd_boolean phdr_in_segment = TRUE;
3614 bfd_boolean writable;
3616 asection *first_tls = NULL;
3617 asection *dynsec, *eh_frame_hdr;
3620 /* Select the allocated sections, and sort them. */
3622 sections = (asection **) bfd_malloc2 (bfd_count_sections (abfd),
3623 sizeof (asection *));
3624 if (sections == NULL)
3628 for (s = abfd->sections; s != NULL; s = s->next)
3630 if ((s->flags & SEC_ALLOC) != 0)
3636 BFD_ASSERT (i <= bfd_count_sections (abfd));
3639 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3641 /* Build the mapping. */
3646 /* If we have a .interp section, then create a PT_PHDR segment for
3647 the program headers and a PT_INTERP segment for the .interp
3649 s = bfd_get_section_by_name (abfd, ".interp");
3650 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3652 amt = sizeof (struct elf_segment_map);
3653 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3657 m->p_type = PT_PHDR;
3658 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3659 m->p_flags = PF_R | PF_X;
3660 m->p_flags_valid = 1;
3661 m->includes_phdrs = 1;
3666 amt = sizeof (struct elf_segment_map);
3667 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3671 m->p_type = PT_INTERP;
3679 /* Look through the sections. We put sections in the same program
3680 segment when the start of the second section can be placed within
3681 a few bytes of the end of the first section. */
3685 maxpagesize = bed->maxpagesize;
3687 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3689 && (dynsec->flags & SEC_LOAD) == 0)
3692 /* Deal with -Ttext or something similar such that the first section
3693 is not adjacent to the program headers. This is an
3694 approximation, since at this point we don't know exactly how many
3695 program headers we will need. */
3698 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
3700 if (phdr_size == (bfd_size_type) -1)
3701 phdr_size = get_program_header_size (abfd, info);
3702 if ((abfd->flags & D_PAGED) == 0
3703 || sections[0]->lma < phdr_size
3704 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3705 phdr_in_segment = FALSE;
3708 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3711 bfd_boolean new_segment;
3715 /* See if this section and the last one will fit in the same
3718 if (last_hdr == NULL)
3720 /* If we don't have a segment yet, then we don't need a new
3721 one (we build the last one after this loop). */
3722 new_segment = FALSE;
3724 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3726 /* If this section has a different relation between the
3727 virtual address and the load address, then we need a new
3731 /* In the next test we have to be careful when last_hdr->lma is close
3732 to the end of the address space. If the aligned address wraps
3733 around to the start of the address space, then there are no more
3734 pages left in memory and it is OK to assume that the current
3735 section can be included in the current segment. */
3736 else if ((BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
3738 && (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
3741 /* If putting this section in this segment would force us to
3742 skip a page in the segment, then we need a new segment. */
3745 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3746 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3748 /* We don't want to put a loadable section after a
3749 nonloadable section in the same segment.
3750 Consider .tbss sections as loadable for this purpose. */
3753 else if ((abfd->flags & D_PAGED) == 0)
3755 /* If the file is not demand paged, which means that we
3756 don't require the sections to be correctly aligned in the
3757 file, then there is no other reason for a new segment. */
3758 new_segment = FALSE;
3761 && (hdr->flags & SEC_READONLY) == 0
3762 && (((last_hdr->lma + last_size - 1)
3763 & ~(maxpagesize - 1))
3764 != (hdr->lma & ~(maxpagesize - 1))))
3766 /* We don't want to put a writable section in a read only
3767 segment, unless they are on the same page in memory
3768 anyhow. We already know that the last section does not
3769 bring us past the current section on the page, so the
3770 only case in which the new section is not on the same
3771 page as the previous section is when the previous section
3772 ends precisely on a page boundary. */
3777 /* Otherwise, we can use the same segment. */
3778 new_segment = FALSE;
3781 /* Allow interested parties a chance to override our decision. */
3782 if (last_hdr != NULL
3784 && info->callbacks->override_segment_assignment != NULL)
3786 = info->callbacks->override_segment_assignment (info, abfd, hdr,
3792 if ((hdr->flags & SEC_READONLY) == 0)
3795 /* .tbss sections effectively have zero size. */
3796 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
3797 != SEC_THREAD_LOCAL)
3798 last_size = hdr->size;
3804 /* We need a new program segment. We must create a new program
3805 header holding all the sections from phdr_index until hdr. */
3807 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3814 if ((hdr->flags & SEC_READONLY) == 0)
3820 /* .tbss sections effectively have zero size. */
3821 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3822 last_size = hdr->size;
3826 phdr_in_segment = FALSE;
3829 /* Create a final PT_LOAD program segment. */
3830 if (last_hdr != NULL)
3832 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3840 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3843 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
3850 /* For each batch of consecutive loadable .note sections,
3851 add a PT_NOTE segment. We don't use bfd_get_section_by_name,
3852 because if we link together nonloadable .note sections and
3853 loadable .note sections, we will generate two .note sections
3854 in the output file. FIXME: Using names for section types is
3856 for (s = abfd->sections; s != NULL; s = s->next)
3858 if ((s->flags & SEC_LOAD) != 0
3859 && CONST_STRNEQ (s->name, ".note"))
3864 amt = sizeof (struct elf_segment_map);
3865 if (s->alignment_power == 2)
3866 for (s2 = s; s2->next != NULL; s2 = s2->next)
3868 if (s2->next->alignment_power == 2
3869 && (s2->next->flags & SEC_LOAD) != 0
3870 && CONST_STRNEQ (s2->next->name, ".note")
3871 && align_power (s2->vma + s2->size, 2)
3877 amt += (count - 1) * sizeof (asection *);
3878 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3882 m->p_type = PT_NOTE;
3886 m->sections[m->count - count--] = s;
3887 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
3890 m->sections[m->count - 1] = s;
3891 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
3895 if (s->flags & SEC_THREAD_LOCAL)
3903 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3906 amt = sizeof (struct elf_segment_map);
3907 amt += (tls_count - 1) * sizeof (asection *);
3908 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3913 m->count = tls_count;
3914 /* Mandated PF_R. */
3916 m->p_flags_valid = 1;
3917 for (i = 0; i < (unsigned int) tls_count; ++i)
3919 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3920 m->sections[i] = first_tls;
3921 first_tls = first_tls->next;
3928 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3930 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3931 if (eh_frame_hdr != NULL
3932 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
3934 amt = sizeof (struct elf_segment_map);
3935 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3939 m->p_type = PT_GNU_EH_FRAME;
3941 m->sections[0] = eh_frame_hdr->output_section;
3947 if (elf_tdata (abfd)->stack_flags)
3949 amt = sizeof (struct elf_segment_map);
3950 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3954 m->p_type = PT_GNU_STACK;
3955 m->p_flags = elf_tdata (abfd)->stack_flags;
3956 m->p_flags_valid = 1;
3962 if (info != NULL && info->relro)
3964 for (m = mfirst; m != NULL; m = m->next)
3966 if (m->p_type == PT_LOAD)
3968 asection *last = m->sections[m->count - 1];
3969 bfd_vma vaddr = m->sections[0]->vma;
3970 bfd_vma filesz = last->vma - vaddr + last->size;
3972 if (vaddr < info->relro_end
3973 && vaddr >= info->relro_start
3974 && (vaddr + filesz) >= info->relro_end)
3979 /* Make a PT_GNU_RELRO segment only when it isn't empty. */
3982 amt = sizeof (struct elf_segment_map);
3983 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3987 m->p_type = PT_GNU_RELRO;
3989 m->p_flags_valid = 1;
3997 elf_tdata (abfd)->segment_map = mfirst;
4000 if (!elf_modify_segment_map (abfd, info, no_user_phdrs))
4003 for (count = 0, m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4005 elf_tdata (abfd)->program_header_size = count * bed->s->sizeof_phdr;
4010 if (sections != NULL)
4015 /* Sort sections by address. */
4018 elf_sort_sections (const void *arg1, const void *arg2)
4020 const asection *sec1 = *(const asection **) arg1;
4021 const asection *sec2 = *(const asection **) arg2;
4022 bfd_size_type size1, size2;
4024 /* Sort by LMA first, since this is the address used to
4025 place the section into a segment. */
4026 if (sec1->lma < sec2->lma)
4028 else if (sec1->lma > sec2->lma)
4031 /* Then sort by VMA. Normally the LMA and the VMA will be
4032 the same, and this will do nothing. */
4033 if (sec1->vma < sec2->vma)
4035 else if (sec1->vma > sec2->vma)
4038 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
4040 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
4046 /* If the indicies are the same, do not return 0
4047 here, but continue to try the next comparison. */
4048 if (sec1->target_index - sec2->target_index != 0)
4049 return sec1->target_index - sec2->target_index;
4054 else if (TOEND (sec2))
4059 /* Sort by size, to put zero sized sections
4060 before others at the same address. */
4062 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
4063 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
4070 return sec1->target_index - sec2->target_index;
4073 /* Ian Lance Taylor writes:
4075 We shouldn't be using % with a negative signed number. That's just
4076 not good. We have to make sure either that the number is not
4077 negative, or that the number has an unsigned type. When the types
4078 are all the same size they wind up as unsigned. When file_ptr is a
4079 larger signed type, the arithmetic winds up as signed long long,
4082 What we're trying to say here is something like ``increase OFF by
4083 the least amount that will cause it to be equal to the VMA modulo
4085 /* In other words, something like:
4087 vma_offset = m->sections[0]->vma % bed->maxpagesize;
4088 off_offset = off % bed->maxpagesize;
4089 if (vma_offset < off_offset)
4090 adjustment = vma_offset + bed->maxpagesize - off_offset;
4092 adjustment = vma_offset - off_offset;
4094 which can can be collapsed into the expression below. */
4097 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
4099 return ((vma - off) % maxpagesize);
4103 print_segment_map (const struct elf_segment_map *m)
4106 const char *pt = get_segment_type (m->p_type);
4111 if (m->p_type >= PT_LOPROC && m->p_type <= PT_HIPROC)
4112 sprintf (buf, "LOPROC+%7.7x",
4113 (unsigned int) (m->p_type - PT_LOPROC));
4114 else if (m->p_type >= PT_LOOS && m->p_type <= PT_HIOS)
4115 sprintf (buf, "LOOS+%7.7x",
4116 (unsigned int) (m->p_type - PT_LOOS));
4118 snprintf (buf, sizeof (buf), "%8.8x",
4119 (unsigned int) m->p_type);
4122 fprintf (stderr, "%s:", pt);
4123 for (j = 0; j < m->count; j++)
4124 fprintf (stderr, " %s", m->sections [j]->name);
4129 write_zeros (bfd *abfd, file_ptr pos, bfd_size_type len)
4134 if (bfd_seek (abfd, pos, SEEK_SET) != 0)
4136 buf = bfd_zmalloc (len);
4139 ret = bfd_bwrite (buf, len, abfd) == len;
4144 /* Assign file positions to the sections based on the mapping from
4145 sections to segments. This function also sets up some fields in
4149 assign_file_positions_for_load_sections (bfd *abfd,
4150 struct bfd_link_info *link_info)
4152 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4153 struct elf_segment_map *m;
4154 Elf_Internal_Phdr *phdrs;
4155 Elf_Internal_Phdr *p;
4157 bfd_size_type maxpagesize;
4160 bfd_vma header_pad = 0;
4162 if (link_info == NULL
4163 && !_bfd_elf_map_sections_to_segments (abfd, link_info))
4167 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4171 header_pad = m->header_size;
4174 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
4175 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
4176 elf_elfheader (abfd)->e_phnum = alloc;
4178 if (elf_tdata (abfd)->program_header_size == (bfd_size_type) -1)
4179 elf_tdata (abfd)->program_header_size = alloc * bed->s->sizeof_phdr;
4181 BFD_ASSERT (elf_tdata (abfd)->program_header_size
4182 >= alloc * bed->s->sizeof_phdr);
4186 elf_tdata (abfd)->next_file_pos = bed->s->sizeof_ehdr;
4190 /* We're writing the size in elf_tdata (abfd)->program_header_size,
4191 see assign_file_positions_except_relocs, so make sure we have
4192 that amount allocated, with trailing space cleared.
4193 The variable alloc contains the computed need, while elf_tdata
4194 (abfd)->program_header_size contains the size used for the
4196 See ld/emultempl/elf-generic.em:gld${EMULATION_NAME}_map_segments
4197 where the layout is forced to according to a larger size in the
4198 last iterations for the testcase ld-elf/header. */
4199 BFD_ASSERT (elf_tdata (abfd)->program_header_size % bed->s->sizeof_phdr
4201 phdrs = (Elf_Internal_Phdr *)
4203 (elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr),
4204 sizeof (Elf_Internal_Phdr));
4205 elf_tdata (abfd)->phdr = phdrs;
4210 if ((abfd->flags & D_PAGED) != 0)
4211 maxpagesize = bed->maxpagesize;
4213 off = bed->s->sizeof_ehdr;
4214 off += alloc * bed->s->sizeof_phdr;
4215 if (header_pad < (bfd_vma) off)
4221 for (m = elf_tdata (abfd)->segment_map, p = phdrs, j = 0;
4223 m = m->next, p++, j++)
4227 bfd_boolean no_contents;
4229 /* If elf_segment_map is not from map_sections_to_segments, the
4230 sections may not be correctly ordered. NOTE: sorting should
4231 not be done to the PT_NOTE section of a corefile, which may
4232 contain several pseudo-sections artificially created by bfd.
4233 Sorting these pseudo-sections breaks things badly. */
4235 && !(elf_elfheader (abfd)->e_type == ET_CORE
4236 && m->p_type == PT_NOTE))
4237 qsort (m->sections, (size_t) m->count, sizeof (asection *),
4240 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4241 number of sections with contents contributing to both p_filesz
4242 and p_memsz, followed by a number of sections with no contents
4243 that just contribute to p_memsz. In this loop, OFF tracks next
4244 available file offset for PT_LOAD and PT_NOTE segments. */
4245 p->p_type = m->p_type;
4246 p->p_flags = m->p_flags;
4251 p->p_vaddr = m->sections[0]->vma - m->p_vaddr_offset;
4253 if (m->p_paddr_valid)
4254 p->p_paddr = m->p_paddr;
4255 else if (m->count == 0)
4258 p->p_paddr = m->sections[0]->lma - m->p_vaddr_offset;
4260 if (p->p_type == PT_LOAD
4261 && (abfd->flags & D_PAGED) != 0)
4263 /* p_align in demand paged PT_LOAD segments effectively stores
4264 the maximum page size. When copying an executable with
4265 objcopy, we set m->p_align from the input file. Use this
4266 value for maxpagesize rather than bed->maxpagesize, which
4267 may be different. Note that we use maxpagesize for PT_TLS
4268 segment alignment later in this function, so we are relying
4269 on at least one PT_LOAD segment appearing before a PT_TLS
4271 if (m->p_align_valid)
4272 maxpagesize = m->p_align;
4274 p->p_align = maxpagesize;
4276 else if (m->p_align_valid)
4277 p->p_align = m->p_align;
4278 else if (m->count == 0)
4279 p->p_align = 1 << bed->s->log_file_align;
4283 no_contents = FALSE;
4285 if (p->p_type == PT_LOAD
4288 bfd_size_type align;
4289 unsigned int align_power = 0;
4291 if (m->p_align_valid)
4295 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4297 unsigned int secalign;
4299 secalign = bfd_get_section_alignment (abfd, *secpp);
4300 if (secalign > align_power)
4301 align_power = secalign;
4303 align = (bfd_size_type) 1 << align_power;
4304 if (align < maxpagesize)
4305 align = maxpagesize;
4308 for (i = 0; i < m->count; i++)
4309 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
4310 /* If we aren't making room for this section, then
4311 it must be SHT_NOBITS regardless of what we've
4312 set via struct bfd_elf_special_section. */
4313 elf_section_type (m->sections[i]) = SHT_NOBITS;
4315 /* Find out whether this segment contains any loadable
4318 for (i = 0; i < m->count; i++)
4319 if (elf_section_type (m->sections[i]) != SHT_NOBITS)
4321 no_contents = FALSE;
4325 off_adjust = vma_page_aligned_bias (m->sections[0]->vma, off, align);
4329 /* We shouldn't need to align the segment on disk since
4330 the segment doesn't need file space, but the gABI
4331 arguably requires the alignment and glibc ld.so
4332 checks it. So to comply with the alignment
4333 requirement but not waste file space, we adjust
4334 p_offset for just this segment. (OFF_ADJUST is
4335 subtracted from OFF later.) This may put p_offset
4336 past the end of file, but that shouldn't matter. */
4341 /* Make sure the .dynamic section is the first section in the
4342 PT_DYNAMIC segment. */
4343 else if (p->p_type == PT_DYNAMIC
4345 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4348 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4350 bfd_set_error (bfd_error_bad_value);
4353 /* Set the note section type to SHT_NOTE. */
4354 else if (p->p_type == PT_NOTE)
4355 for (i = 0; i < m->count; i++)
4356 elf_section_type (m->sections[i]) = SHT_NOTE;
4362 if (m->includes_filehdr)
4364 if (!m->p_flags_valid)
4366 p->p_filesz = bed->s->sizeof_ehdr;
4367 p->p_memsz = bed->s->sizeof_ehdr;
4370 BFD_ASSERT (p->p_type == PT_LOAD);
4372 if (p->p_vaddr < (bfd_vma) off)
4374 (*_bfd_error_handler)
4375 (_("%B: Not enough room for program headers, try linking with -N"),
4377 bfd_set_error (bfd_error_bad_value);
4382 if (!m->p_paddr_valid)
4387 if (m->includes_phdrs)
4389 if (!m->p_flags_valid)
4392 if (!m->includes_filehdr)
4394 p->p_offset = bed->s->sizeof_ehdr;
4398 BFD_ASSERT (p->p_type == PT_LOAD);
4399 p->p_vaddr -= off - p->p_offset;
4400 if (!m->p_paddr_valid)
4401 p->p_paddr -= off - p->p_offset;
4405 p->p_filesz += alloc * bed->s->sizeof_phdr;
4406 p->p_memsz += alloc * bed->s->sizeof_phdr;
4409 p->p_filesz += header_pad;
4410 p->p_memsz += header_pad;
4414 if (p->p_type == PT_LOAD
4415 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4417 if (!m->includes_filehdr && !m->includes_phdrs)
4423 adjust = off - (p->p_offset + p->p_filesz);
4425 p->p_filesz += adjust;
4426 p->p_memsz += adjust;
4430 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
4431 maps. Set filepos for sections in PT_LOAD segments, and in
4432 core files, for sections in PT_NOTE segments.
4433 assign_file_positions_for_non_load_sections will set filepos
4434 for other sections and update p_filesz for other segments. */
4435 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4438 bfd_size_type align;
4439 Elf_Internal_Shdr *this_hdr;
4442 this_hdr = &elf_section_data (sec)->this_hdr;
4443 align = (bfd_size_type) 1 << bfd_get_section_alignment (abfd, sec);
4445 if ((p->p_type == PT_LOAD
4446 || p->p_type == PT_TLS)
4447 && (this_hdr->sh_type != SHT_NOBITS
4448 || ((this_hdr->sh_flags & SHF_ALLOC) != 0
4449 && ((this_hdr->sh_flags & SHF_TLS) == 0
4450 || p->p_type == PT_TLS))))
4452 bfd_signed_vma adjust = sec->vma - (p->p_vaddr + p->p_memsz);
4454 if (sec->vma < p->p_vaddr + p->p_memsz)
4456 (*_bfd_error_handler)
4457 (_("%B: section %A vma 0x%lx overlaps previous sections"),
4458 abfd, sec, (unsigned long) sec->vma);
4461 p->p_memsz += adjust;
4463 if (p->p_paddr + p->p_memsz != sec->lma)
4465 /* This behavior is a compromise--ld has long
4466 silently changed the lma of sections when
4467 lma - vma is not equal for every section in a
4468 pheader--but only in the internal elf structures.
4469 Silently changing the lma is probably a bug, but
4470 changing it would have subtle and unknown
4471 consequences for existing scripts.
4473 Instead modify the bfd data structure to reflect
4474 what happened. This at least fixes the values
4475 for the lma in the mapfile. */
4476 sec->lma = p->p_paddr + p->p_memsz;
4479 if (this_hdr->sh_type != SHT_NOBITS)
4481 if (p->p_filesz + adjust < p->p_memsz)
4483 /* We have a PROGBITS section following NOBITS ones.
4484 Allocate file space for the NOBITS section(s) and
4486 adjust = p->p_memsz - p->p_filesz;
4487 if (!write_zeros (abfd, off, adjust))
4491 p->p_filesz += adjust;
4495 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4497 /* The section at i == 0 is the one that actually contains
4501 this_hdr->sh_offset = sec->filepos = off;
4502 off += this_hdr->sh_size;
4503 p->p_filesz = this_hdr->sh_size;
4509 /* The rest are fake sections that shouldn't be written. */
4518 if (p->p_type == PT_LOAD)
4520 this_hdr->sh_offset = sec->filepos = off;
4521 if (this_hdr->sh_type != SHT_NOBITS)
4522 off += this_hdr->sh_size;
4525 if (this_hdr->sh_type != SHT_NOBITS)
4527 p->p_filesz += this_hdr->sh_size;
4528 /* A load section without SHF_ALLOC is something like
4529 a note section in a PT_NOTE segment. These take
4530 file space but are not loaded into memory. */
4531 if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4532 p->p_memsz += this_hdr->sh_size;
4534 else if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4536 if (p->p_type == PT_TLS)
4537 p->p_memsz += this_hdr->sh_size;
4539 /* .tbss is special. It doesn't contribute to p_memsz of
4541 else if ((this_hdr->sh_flags & SHF_TLS) == 0)
4542 p->p_memsz += this_hdr->sh_size;
4545 if (align > p->p_align
4546 && !m->p_align_valid
4547 && (p->p_type != PT_LOAD
4548 || (abfd->flags & D_PAGED) == 0))
4552 if (!m->p_flags_valid)
4555 if ((this_hdr->sh_flags & SHF_EXECINSTR) != 0)
4557 if ((this_hdr->sh_flags & SHF_WRITE) != 0)
4563 /* Check that all sections are in a PT_LOAD segment.
4564 Don't check funky gdb generated core files. */
4565 if (p->p_type == PT_LOAD && bfd_get_format (abfd) != bfd_core)
4566 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4568 Elf_Internal_Shdr *this_hdr;
4572 this_hdr = &(elf_section_data(sec)->this_hdr);
4573 if (this_hdr->sh_size != 0
4574 && !ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, p))
4576 (*_bfd_error_handler)
4577 (_("%B: section `%A' can't be allocated in segment %d"),
4579 print_segment_map (m);
4580 bfd_set_error (bfd_error_bad_value);
4586 elf_tdata (abfd)->next_file_pos = off;
4590 /* Assign file positions for the other sections. */
4593 assign_file_positions_for_non_load_sections (bfd *abfd,
4594 struct bfd_link_info *link_info)
4596 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4597 Elf_Internal_Shdr **i_shdrpp;
4598 Elf_Internal_Shdr **hdrpp;
4599 Elf_Internal_Phdr *phdrs;
4600 Elf_Internal_Phdr *p;
4601 struct elf_segment_map *m;
4602 bfd_vma filehdr_vaddr, filehdr_paddr;
4603 bfd_vma phdrs_vaddr, phdrs_paddr;
4605 unsigned int num_sec;
4609 i_shdrpp = elf_elfsections (abfd);
4610 num_sec = elf_numsections (abfd);
4611 off = elf_tdata (abfd)->next_file_pos;
4612 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4614 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4615 Elf_Internal_Shdr *hdr;
4618 if (hdr->bfd_section != NULL
4619 && (hdr->bfd_section->filepos != 0
4620 || (hdr->sh_type == SHT_NOBITS
4621 && hdr->contents == NULL)))
4622 BFD_ASSERT (hdr->sh_offset == hdr->bfd_section->filepos);
4623 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4625 if (hdr->sh_size != 0)
4626 ((*_bfd_error_handler)
4627 (_("%B: warning: allocated section `%s' not in segment"),
4629 (hdr->bfd_section == NULL
4631 : hdr->bfd_section->name)));
4632 /* We don't need to page align empty sections. */
4633 if ((abfd->flags & D_PAGED) != 0 && hdr->sh_size != 0)
4634 off += vma_page_aligned_bias (hdr->sh_addr, off,
4637 off += vma_page_aligned_bias (hdr->sh_addr, off,
4639 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4642 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4643 && hdr->bfd_section == NULL)
4644 || hdr == i_shdrpp[tdata->symtab_section]
4645 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4646 || hdr == i_shdrpp[tdata->strtab_section])
4647 hdr->sh_offset = -1;
4649 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4652 /* Now that we have set the section file positions, we can set up
4653 the file positions for the non PT_LOAD segments. */
4657 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4659 phdrs = elf_tdata (abfd)->phdr;
4660 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4665 if (p->p_type != PT_LOAD)
4668 if (m->includes_filehdr)
4670 filehdr_vaddr = p->p_vaddr;
4671 filehdr_paddr = p->p_paddr;
4673 if (m->includes_phdrs)
4675 phdrs_vaddr = p->p_vaddr;
4676 phdrs_paddr = p->p_paddr;
4677 if (m->includes_filehdr)
4679 phdrs_vaddr += bed->s->sizeof_ehdr;
4680 phdrs_paddr += bed->s->sizeof_ehdr;
4685 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4689 if (p->p_type == PT_GNU_RELRO)
4691 const Elf_Internal_Phdr *lp;
4693 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
4695 if (link_info != NULL)
4697 /* During linking the range of the RELRO segment is passed
4699 for (lp = phdrs; lp < phdrs + count; ++lp)
4701 if (lp->p_type == PT_LOAD
4702 && lp->p_vaddr >= link_info->relro_start
4703 && lp->p_vaddr < link_info->relro_end
4704 && lp->p_vaddr + lp->p_filesz >= link_info->relro_end)
4710 /* Otherwise we are copying an executable or shared
4711 library, but we need to use the same linker logic. */
4712 for (lp = phdrs; lp < phdrs + count; ++lp)
4714 if (lp->p_type == PT_LOAD
4715 && lp->p_paddr == p->p_paddr)
4720 if (lp < phdrs + count)
4722 p->p_vaddr = lp->p_vaddr;
4723 p->p_paddr = lp->p_paddr;
4724 p->p_offset = lp->p_offset;
4725 if (link_info != NULL)
4726 p->p_filesz = link_info->relro_end - lp->p_vaddr;
4727 else if (m->p_size_valid)
4728 p->p_filesz = m->p_size;
4731 p->p_memsz = p->p_filesz;
4733 p->p_flags = (lp->p_flags & ~PF_W);
4737 memset (p, 0, sizeof *p);
4738 p->p_type = PT_NULL;
4741 else if (m->count != 0)
4743 if (p->p_type != PT_LOAD
4744 && (p->p_type != PT_NOTE
4745 || bfd_get_format (abfd) != bfd_core))
4747 Elf_Internal_Shdr *hdr;
4750 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
4752 sect = m->sections[m->count - 1];
4753 hdr = &elf_section_data (sect)->this_hdr;
4754 p->p_filesz = sect->filepos - m->sections[0]->filepos;
4755 if (hdr->sh_type != SHT_NOBITS)
4756 p->p_filesz += hdr->sh_size;
4757 p->p_offset = m->sections[0]->filepos;
4760 else if (m->includes_filehdr)
4762 p->p_vaddr = filehdr_vaddr;
4763 if (! m->p_paddr_valid)
4764 p->p_paddr = filehdr_paddr;
4766 else if (m->includes_phdrs)
4768 p->p_vaddr = phdrs_vaddr;
4769 if (! m->p_paddr_valid)
4770 p->p_paddr = phdrs_paddr;
4774 elf_tdata (abfd)->next_file_pos = off;
4779 /* Work out the file positions of all the sections. This is called by
4780 _bfd_elf_compute_section_file_positions. All the section sizes and
4781 VMAs must be known before this is called.
4783 Reloc sections come in two flavours: Those processed specially as
4784 "side-channel" data attached to a section to which they apply, and
4785 those that bfd doesn't process as relocations. The latter sort are
4786 stored in a normal bfd section by bfd_section_from_shdr. We don't
4787 consider the former sort here, unless they form part of the loadable
4788 image. Reloc sections not assigned here will be handled later by
4789 assign_file_positions_for_relocs.
4791 We also don't set the positions of the .symtab and .strtab here. */
4794 assign_file_positions_except_relocs (bfd *abfd,
4795 struct bfd_link_info *link_info)
4797 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4798 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4800 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4802 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4803 && bfd_get_format (abfd) != bfd_core)
4805 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4806 unsigned int num_sec = elf_numsections (abfd);
4807 Elf_Internal_Shdr **hdrpp;
4810 /* Start after the ELF header. */
4811 off = i_ehdrp->e_ehsize;
4813 /* We are not creating an executable, which means that we are
4814 not creating a program header, and that the actual order of
4815 the sections in the file is unimportant. */
4816 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4818 Elf_Internal_Shdr *hdr;
4821 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4822 && hdr->bfd_section == NULL)
4823 || i == tdata->symtab_section
4824 || i == tdata->symtab_shndx_section
4825 || i == tdata->strtab_section)
4827 hdr->sh_offset = -1;
4830 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4837 /* Assign file positions for the loaded sections based on the
4838 assignment of sections to segments. */
4839 if (!assign_file_positions_for_load_sections (abfd, link_info))
4842 /* And for non-load sections. */
4843 if (!assign_file_positions_for_non_load_sections (abfd, link_info))
4846 if (bed->elf_backend_modify_program_headers != NULL)
4848 if (!(*bed->elf_backend_modify_program_headers) (abfd, link_info))
4852 /* Write out the program headers. */
4853 alloc = tdata->program_header_size / bed->s->sizeof_phdr;
4854 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4855 || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
4858 off = tdata->next_file_pos;
4861 /* Place the section headers. */
4862 off = align_file_position (off, 1 << bed->s->log_file_align);
4863 i_ehdrp->e_shoff = off;
4864 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4866 tdata->next_file_pos = off;
4872 prep_headers (bfd *abfd)
4874 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form. */
4875 struct elf_strtab_hash *shstrtab;
4876 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4878 i_ehdrp = elf_elfheader (abfd);
4880 shstrtab = _bfd_elf_strtab_init ();
4881 if (shstrtab == NULL)
4884 elf_shstrtab (abfd) = shstrtab;
4886 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4887 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4888 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4889 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4891 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4892 i_ehdrp->e_ident[EI_DATA] =
4893 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4894 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4896 if ((abfd->flags & DYNAMIC) != 0)
4897 i_ehdrp->e_type = ET_DYN;
4898 else if ((abfd->flags & EXEC_P) != 0)
4899 i_ehdrp->e_type = ET_EXEC;
4900 else if (bfd_get_format (abfd) == bfd_core)
4901 i_ehdrp->e_type = ET_CORE;
4903 i_ehdrp->e_type = ET_REL;
4905 switch (bfd_get_arch (abfd))
4907 case bfd_arch_unknown:
4908 i_ehdrp->e_machine = EM_NONE;
4911 /* There used to be a long list of cases here, each one setting
4912 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4913 in the corresponding bfd definition. To avoid duplication,
4914 the switch was removed. Machines that need special handling
4915 can generally do it in elf_backend_final_write_processing(),
4916 unless they need the information earlier than the final write.
4917 Such need can generally be supplied by replacing the tests for
4918 e_machine with the conditions used to determine it. */
4920 i_ehdrp->e_machine = bed->elf_machine_code;
4923 i_ehdrp->e_version = bed->s->ev_current;
4924 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4926 /* No program header, for now. */
4927 i_ehdrp->e_phoff = 0;
4928 i_ehdrp->e_phentsize = 0;
4929 i_ehdrp->e_phnum = 0;
4931 /* Each bfd section is section header entry. */
4932 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4933 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4935 /* If we're building an executable, we'll need a program header table. */
4936 if (abfd->flags & EXEC_P)
4937 /* It all happens later. */
4941 i_ehdrp->e_phentsize = 0;
4942 i_ehdrp->e_phoff = 0;
4945 elf_tdata (abfd)->symtab_hdr.sh_name =
4946 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
4947 elf_tdata (abfd)->strtab_hdr.sh_name =
4948 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
4949 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4950 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
4951 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4952 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4953 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4959 /* Assign file positions for all the reloc sections which are not part
4960 of the loadable file image. */
4963 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
4966 unsigned int i, num_sec;
4967 Elf_Internal_Shdr **shdrpp;
4969 off = elf_tdata (abfd)->next_file_pos;
4971 num_sec = elf_numsections (abfd);
4972 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4974 Elf_Internal_Shdr *shdrp;
4977 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4978 && shdrp->sh_offset == -1)
4979 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
4982 elf_tdata (abfd)->next_file_pos = off;
4986 _bfd_elf_write_object_contents (bfd *abfd)
4988 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4989 Elf_Internal_Shdr **i_shdrp;
4991 unsigned int count, num_sec;
4993 if (! abfd->output_has_begun
4994 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
4997 i_shdrp = elf_elfsections (abfd);
5000 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
5004 _bfd_elf_assign_file_positions_for_relocs (abfd);
5006 /* After writing the headers, we need to write the sections too... */
5007 num_sec = elf_numsections (abfd);
5008 for (count = 1; count < num_sec; count++)
5010 if (bed->elf_backend_section_processing)
5011 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
5012 if (i_shdrp[count]->contents)
5014 bfd_size_type amt = i_shdrp[count]->sh_size;
5016 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
5017 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
5022 /* Write out the section header names. */
5023 if (elf_shstrtab (abfd) != NULL
5024 && (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
5025 || !_bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
5028 if (bed->elf_backend_final_write_processing)
5029 (*bed->elf_backend_final_write_processing) (abfd,
5030 elf_tdata (abfd)->linker);
5032 if (!bed->s->write_shdrs_and_ehdr (abfd))
5035 /* This is last since write_shdrs_and_ehdr can touch i_shdrp[0]. */
5036 if (elf_tdata (abfd)->after_write_object_contents)
5037 return (*elf_tdata (abfd)->after_write_object_contents) (abfd);
5043 _bfd_elf_write_corefile_contents (bfd *abfd)
5045 /* Hopefully this can be done just like an object file. */
5046 return _bfd_elf_write_object_contents (abfd);
5049 /* Given a section, search the header to find them. */
5052 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
5054 const struct elf_backend_data *bed;
5055 unsigned int sec_index;
5057 if (elf_section_data (asect) != NULL
5058 && elf_section_data (asect)->this_idx != 0)
5059 return elf_section_data (asect)->this_idx;
5061 if (bfd_is_abs_section (asect))
5062 sec_index = SHN_ABS;
5063 else if (bfd_is_com_section (asect))
5064 sec_index = SHN_COMMON;
5065 else if (bfd_is_und_section (asect))
5066 sec_index = SHN_UNDEF;
5068 sec_index = SHN_BAD;
5070 bed = get_elf_backend_data (abfd);
5071 if (bed->elf_backend_section_from_bfd_section)
5073 int retval = sec_index;
5075 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
5079 if (sec_index == SHN_BAD)
5080 bfd_set_error (bfd_error_nonrepresentable_section);
5085 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
5089 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
5091 asymbol *asym_ptr = *asym_ptr_ptr;
5093 flagword flags = asym_ptr->flags;
5095 /* When gas creates relocations against local labels, it creates its
5096 own symbol for the section, but does put the symbol into the
5097 symbol chain, so udata is 0. When the linker is generating
5098 relocatable output, this section symbol may be for one of the
5099 input sections rather than the output section. */
5100 if (asym_ptr->udata.i == 0
5101 && (flags & BSF_SECTION_SYM)
5102 && asym_ptr->section)
5107 sec = asym_ptr->section;
5108 if (sec->owner != abfd && sec->output_section != NULL)
5109 sec = sec->output_section;
5110 if (sec->owner == abfd
5111 && (indx = sec->index) < elf_num_section_syms (abfd)
5112 && elf_section_syms (abfd)[indx] != NULL)
5113 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
5116 idx = asym_ptr->udata.i;
5120 /* This case can occur when using --strip-symbol on a symbol
5121 which is used in a relocation entry. */
5122 (*_bfd_error_handler)
5123 (_("%B: symbol `%s' required but not present"),
5124 abfd, bfd_asymbol_name (asym_ptr));
5125 bfd_set_error (bfd_error_no_symbols);
5132 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
5133 (long) asym_ptr, asym_ptr->name, idx, flags,
5134 elf_symbol_flags (flags));
5142 /* Rewrite program header information. */
5145 rewrite_elf_program_header (bfd *ibfd, bfd *obfd)
5147 Elf_Internal_Ehdr *iehdr;
5148 struct elf_segment_map *map;
5149 struct elf_segment_map *map_first;
5150 struct elf_segment_map **pointer_to_map;
5151 Elf_Internal_Phdr *segment;
5154 unsigned int num_segments;
5155 bfd_boolean phdr_included = FALSE;
5156 bfd_boolean p_paddr_valid;
5157 bfd_vma maxpagesize;
5158 struct elf_segment_map *phdr_adjust_seg = NULL;
5159 unsigned int phdr_adjust_num = 0;
5160 const struct elf_backend_data *bed;
5162 bed = get_elf_backend_data (ibfd);
5163 iehdr = elf_elfheader (ibfd);
5166 pointer_to_map = &map_first;
5168 num_segments = elf_elfheader (ibfd)->e_phnum;
5169 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
5171 /* Returns the end address of the segment + 1. */
5172 #define SEGMENT_END(segment, start) \
5173 (start + (segment->p_memsz > segment->p_filesz \
5174 ? segment->p_memsz : segment->p_filesz))
5176 #define SECTION_SIZE(section, segment) \
5177 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5178 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5179 ? section->size : 0)
5181 /* Returns TRUE if the given section is contained within
5182 the given segment. VMA addresses are compared. */
5183 #define IS_CONTAINED_BY_VMA(section, segment) \
5184 (section->vma >= segment->p_vaddr \
5185 && (section->vma + SECTION_SIZE (section, segment) \
5186 <= (SEGMENT_END (segment, segment->p_vaddr))))
5188 /* Returns TRUE if the given section is contained within
5189 the given segment. LMA addresses are compared. */
5190 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5191 (section->lma >= base \
5192 && (section->lma + SECTION_SIZE (section, segment) \
5193 <= SEGMENT_END (segment, base)))
5195 /* Handle PT_NOTE segment. */
5196 #define IS_NOTE(p, s) \
5197 (p->p_type == PT_NOTE \
5198 && elf_section_type (s) == SHT_NOTE \
5199 && (bfd_vma) s->filepos >= p->p_offset \
5200 && ((bfd_vma) s->filepos + s->size \
5201 <= p->p_offset + p->p_filesz))
5203 /* Special case: corefile "NOTE" section containing regs, prpsinfo
5205 #define IS_COREFILE_NOTE(p, s) \
5207 && bfd_get_format (ibfd) == bfd_core \
5211 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5212 linker, which generates a PT_INTERP section with p_vaddr and
5213 p_memsz set to 0. */
5214 #define IS_SOLARIS_PT_INTERP(p, s) \
5216 && p->p_paddr == 0 \
5217 && p->p_memsz == 0 \
5218 && p->p_filesz > 0 \
5219 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5221 && (bfd_vma) s->filepos >= p->p_offset \
5222 && ((bfd_vma) s->filepos + s->size \
5223 <= p->p_offset + p->p_filesz))
5225 /* Decide if the given section should be included in the given segment.
5226 A section will be included if:
5227 1. It is within the address space of the segment -- we use the LMA
5228 if that is set for the segment and the VMA otherwise,
5229 2. It is an allocated section or a NOTE section in a PT_NOTE
5231 3. There is an output section associated with it,
5232 4. The section has not already been allocated to a previous segment.
5233 5. PT_GNU_STACK segments do not include any sections.
5234 6. PT_TLS segment includes only SHF_TLS sections.
5235 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5236 8. PT_DYNAMIC should not contain empty sections at the beginning
5237 (with the possible exception of .dynamic). */
5238 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
5239 ((((segment->p_paddr \
5240 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5241 : IS_CONTAINED_BY_VMA (section, segment)) \
5242 && (section->flags & SEC_ALLOC) != 0) \
5243 || IS_NOTE (segment, section)) \
5244 && segment->p_type != PT_GNU_STACK \
5245 && (segment->p_type != PT_TLS \
5246 || (section->flags & SEC_THREAD_LOCAL)) \
5247 && (segment->p_type == PT_LOAD \
5248 || segment->p_type == PT_TLS \
5249 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5250 && (segment->p_type != PT_DYNAMIC \
5251 || SECTION_SIZE (section, segment) > 0 \
5252 || (segment->p_paddr \
5253 ? segment->p_paddr != section->lma \
5254 : segment->p_vaddr != section->vma) \
5255 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5257 && !section->segment_mark)
5259 /* If the output section of a section in the input segment is NULL,
5260 it is removed from the corresponding output segment. */
5261 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5262 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
5263 && section->output_section != NULL)
5265 /* Returns TRUE iff seg1 starts after the end of seg2. */
5266 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5267 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5269 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5270 their VMA address ranges and their LMA address ranges overlap.
5271 It is possible to have overlapping VMA ranges without overlapping LMA
5272 ranges. RedBoot images for example can have both .data and .bss mapped
5273 to the same VMA range, but with the .data section mapped to a different
5275 #define SEGMENT_OVERLAPS(seg1, seg2) \
5276 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5277 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5278 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5279 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5281 /* Initialise the segment mark field. */
5282 for (section = ibfd->sections; section != NULL; section = section->next)
5283 section->segment_mark = FALSE;
5285 /* The Solaris linker creates program headers in which all the
5286 p_paddr fields are zero. When we try to objcopy or strip such a
5287 file, we get confused. Check for this case, and if we find it
5288 don't set the p_paddr_valid fields. */
5289 p_paddr_valid = FALSE;
5290 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5293 if (segment->p_paddr != 0)
5295 p_paddr_valid = TRUE;
5299 /* Scan through the segments specified in the program header
5300 of the input BFD. For this first scan we look for overlaps
5301 in the loadable segments. These can be created by weird
5302 parameters to objcopy. Also, fix some solaris weirdness. */
5303 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5308 Elf_Internal_Phdr *segment2;
5310 if (segment->p_type == PT_INTERP)
5311 for (section = ibfd->sections; section; section = section->next)
5312 if (IS_SOLARIS_PT_INTERP (segment, section))
5314 /* Mininal change so that the normal section to segment
5315 assignment code will work. */
5316 segment->p_vaddr = section->vma;
5320 if (segment->p_type != PT_LOAD)
5322 /* Remove PT_GNU_RELRO segment. */
5323 if (segment->p_type == PT_GNU_RELRO)
5324 segment->p_type = PT_NULL;
5328 /* Determine if this segment overlaps any previous segments. */
5329 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2++)
5331 bfd_signed_vma extra_length;
5333 if (segment2->p_type != PT_LOAD
5334 || !SEGMENT_OVERLAPS (segment, segment2))
5337 /* Merge the two segments together. */
5338 if (segment2->p_vaddr < segment->p_vaddr)
5340 /* Extend SEGMENT2 to include SEGMENT and then delete
5342 extra_length = (SEGMENT_END (segment, segment->p_vaddr)
5343 - SEGMENT_END (segment2, segment2->p_vaddr));
5345 if (extra_length > 0)
5347 segment2->p_memsz += extra_length;
5348 segment2->p_filesz += extra_length;
5351 segment->p_type = PT_NULL;
5353 /* Since we have deleted P we must restart the outer loop. */
5355 segment = elf_tdata (ibfd)->phdr;
5360 /* Extend SEGMENT to include SEGMENT2 and then delete
5362 extra_length = (SEGMENT_END (segment2, segment2->p_vaddr)
5363 - SEGMENT_END (segment, segment->p_vaddr));
5365 if (extra_length > 0)
5367 segment->p_memsz += extra_length;
5368 segment->p_filesz += extra_length;
5371 segment2->p_type = PT_NULL;
5376 /* The second scan attempts to assign sections to segments. */
5377 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5381 unsigned int section_count;
5382 asection **sections;
5383 asection *output_section;
5385 bfd_vma matching_lma;
5386 bfd_vma suggested_lma;
5389 asection *first_section;
5390 bfd_boolean first_matching_lma;
5391 bfd_boolean first_suggested_lma;
5393 if (segment->p_type == PT_NULL)
5396 first_section = NULL;
5397 /* Compute how many sections might be placed into this segment. */
5398 for (section = ibfd->sections, section_count = 0;
5400 section = section->next)
5402 /* Find the first section in the input segment, which may be
5403 removed from the corresponding output segment. */
5404 if (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed))
5406 if (first_section == NULL)
5407 first_section = section;
5408 if (section->output_section != NULL)
5413 /* Allocate a segment map big enough to contain
5414 all of the sections we have selected. */
5415 amt = sizeof (struct elf_segment_map);
5416 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5417 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
5421 /* Initialise the fields of the segment map. Default to
5422 using the physical address of the segment in the input BFD. */
5424 map->p_type = segment->p_type;
5425 map->p_flags = segment->p_flags;
5426 map->p_flags_valid = 1;
5428 /* If the first section in the input segment is removed, there is
5429 no need to preserve segment physical address in the corresponding
5431 if (!first_section || first_section->output_section != NULL)
5433 map->p_paddr = segment->p_paddr;
5434 map->p_paddr_valid = p_paddr_valid;
5437 /* Determine if this segment contains the ELF file header
5438 and if it contains the program headers themselves. */
5439 map->includes_filehdr = (segment->p_offset == 0
5440 && segment->p_filesz >= iehdr->e_ehsize);
5441 map->includes_phdrs = 0;
5443 if (!phdr_included || segment->p_type != PT_LOAD)
5445 map->includes_phdrs =
5446 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5447 && (segment->p_offset + segment->p_filesz
5448 >= ((bfd_vma) iehdr->e_phoff
5449 + iehdr->e_phnum * iehdr->e_phentsize)));
5451 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5452 phdr_included = TRUE;
5455 if (section_count == 0)
5457 /* Special segments, such as the PT_PHDR segment, may contain
5458 no sections, but ordinary, loadable segments should contain
5459 something. They are allowed by the ELF spec however, so only
5460 a warning is produced. */
5461 if (segment->p_type == PT_LOAD)
5462 (*_bfd_error_handler) (_("%B: warning: Empty loadable segment"
5463 " detected, is this intentional ?\n"),
5467 *pointer_to_map = map;
5468 pointer_to_map = &map->next;
5473 /* Now scan the sections in the input BFD again and attempt
5474 to add their corresponding output sections to the segment map.
5475 The problem here is how to handle an output section which has
5476 been moved (ie had its LMA changed). There are four possibilities:
5478 1. None of the sections have been moved.
5479 In this case we can continue to use the segment LMA from the
5482 2. All of the sections have been moved by the same amount.
5483 In this case we can change the segment's LMA to match the LMA
5484 of the first section.
5486 3. Some of the sections have been moved, others have not.
5487 In this case those sections which have not been moved can be
5488 placed in the current segment which will have to have its size,
5489 and possibly its LMA changed, and a new segment or segments will
5490 have to be created to contain the other sections.
5492 4. The sections have been moved, but not by the same amount.
5493 In this case we can change the segment's LMA to match the LMA
5494 of the first section and we will have to create a new segment
5495 or segments to contain the other sections.
5497 In order to save time, we allocate an array to hold the section
5498 pointers that we are interested in. As these sections get assigned
5499 to a segment, they are removed from this array. */
5501 sections = (asection **) bfd_malloc2 (section_count, sizeof (asection *));
5502 if (sections == NULL)
5505 /* Step One: Scan for segment vs section LMA conflicts.
5506 Also add the sections to the section array allocated above.
5507 Also add the sections to the current segment. In the common
5508 case, where the sections have not been moved, this means that
5509 we have completely filled the segment, and there is nothing
5514 first_matching_lma = TRUE;
5515 first_suggested_lma = TRUE;
5517 for (section = ibfd->sections;
5519 section = section->next)
5520 if (section == first_section)
5523 for (j = 0; section != NULL; section = section->next)
5525 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5527 output_section = section->output_section;
5529 sections[j++] = section;
5531 /* The Solaris native linker always sets p_paddr to 0.
5532 We try to catch that case here, and set it to the
5533 correct value. Note - some backends require that
5534 p_paddr be left as zero. */
5536 && segment->p_vaddr != 0
5537 && !bed->want_p_paddr_set_to_zero
5539 && output_section->lma != 0
5540 && output_section->vma == (segment->p_vaddr
5541 + (map->includes_filehdr
5544 + (map->includes_phdrs
5546 * iehdr->e_phentsize)
5548 map->p_paddr = segment->p_vaddr;
5550 /* Match up the physical address of the segment with the
5551 LMA address of the output section. */
5552 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5553 || IS_COREFILE_NOTE (segment, section)
5554 || (bed->want_p_paddr_set_to_zero
5555 && IS_CONTAINED_BY_VMA (output_section, segment)))
5557 if (first_matching_lma || output_section->lma < matching_lma)
5559 matching_lma = output_section->lma;
5560 first_matching_lma = FALSE;
5563 /* We assume that if the section fits within the segment
5564 then it does not overlap any other section within that
5566 map->sections[isec++] = output_section;
5568 else if (first_suggested_lma)
5570 suggested_lma = output_section->lma;
5571 first_suggested_lma = FALSE;
5574 if (j == section_count)
5579 BFD_ASSERT (j == section_count);
5581 /* Step Two: Adjust the physical address of the current segment,
5583 if (isec == section_count)
5585 /* All of the sections fitted within the segment as currently
5586 specified. This is the default case. Add the segment to
5587 the list of built segments and carry on to process the next
5588 program header in the input BFD. */
5589 map->count = section_count;
5590 *pointer_to_map = map;
5591 pointer_to_map = &map->next;
5594 && !bed->want_p_paddr_set_to_zero
5595 && matching_lma != map->p_paddr
5596 && !map->includes_filehdr
5597 && !map->includes_phdrs)
5598 /* There is some padding before the first section in the
5599 segment. So, we must account for that in the output
5601 map->p_vaddr_offset = matching_lma - map->p_paddr;
5608 if (!first_matching_lma)
5610 /* At least one section fits inside the current segment.
5611 Keep it, but modify its physical address to match the
5612 LMA of the first section that fitted. */
5613 map->p_paddr = matching_lma;
5617 /* None of the sections fitted inside the current segment.
5618 Change the current segment's physical address to match
5619 the LMA of the first section. */
5620 map->p_paddr = suggested_lma;
5623 /* Offset the segment physical address from the lma
5624 to allow for space taken up by elf headers. */
5625 if (map->includes_filehdr)
5627 if (map->p_paddr >= iehdr->e_ehsize)
5628 map->p_paddr -= iehdr->e_ehsize;
5631 map->includes_filehdr = FALSE;
5632 map->includes_phdrs = FALSE;
5636 if (map->includes_phdrs)
5638 if (map->p_paddr >= iehdr->e_phnum * iehdr->e_phentsize)
5640 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5642 /* iehdr->e_phnum is just an estimate of the number
5643 of program headers that we will need. Make a note
5644 here of the number we used and the segment we chose
5645 to hold these headers, so that we can adjust the
5646 offset when we know the correct value. */
5647 phdr_adjust_num = iehdr->e_phnum;
5648 phdr_adjust_seg = map;
5651 map->includes_phdrs = FALSE;
5655 /* Step Three: Loop over the sections again, this time assigning
5656 those that fit to the current segment and removing them from the
5657 sections array; but making sure not to leave large gaps. Once all
5658 possible sections have been assigned to the current segment it is
5659 added to the list of built segments and if sections still remain
5660 to be assigned, a new segment is constructed before repeating
5667 first_suggested_lma = TRUE;
5669 /* Fill the current segment with sections that fit. */
5670 for (j = 0; j < section_count; j++)
5672 section = sections[j];
5674 if (section == NULL)
5677 output_section = section->output_section;
5679 BFD_ASSERT (output_section != NULL);
5681 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5682 || IS_COREFILE_NOTE (segment, section))
5684 if (map->count == 0)
5686 /* If the first section in a segment does not start at
5687 the beginning of the segment, then something is
5689 if (output_section->lma
5691 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5692 + (map->includes_phdrs
5693 ? iehdr->e_phnum * iehdr->e_phentsize
5701 prev_sec = map->sections[map->count - 1];
5703 /* If the gap between the end of the previous section
5704 and the start of this section is more than
5705 maxpagesize then we need to start a new segment. */
5706 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
5708 < BFD_ALIGN (output_section->lma, maxpagesize))
5709 || (prev_sec->lma + prev_sec->size
5710 > output_section->lma))
5712 if (first_suggested_lma)
5714 suggested_lma = output_section->lma;
5715 first_suggested_lma = FALSE;
5722 map->sections[map->count++] = output_section;
5725 section->segment_mark = TRUE;
5727 else if (first_suggested_lma)
5729 suggested_lma = output_section->lma;
5730 first_suggested_lma = FALSE;
5734 BFD_ASSERT (map->count > 0);
5736 /* Add the current segment to the list of built segments. */
5737 *pointer_to_map = map;
5738 pointer_to_map = &map->next;
5740 if (isec < section_count)
5742 /* We still have not allocated all of the sections to
5743 segments. Create a new segment here, initialise it
5744 and carry on looping. */
5745 amt = sizeof (struct elf_segment_map);
5746 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5747 map = (struct elf_segment_map *) bfd_alloc (obfd, amt);
5754 /* Initialise the fields of the segment map. Set the physical
5755 physical address to the LMA of the first section that has
5756 not yet been assigned. */
5758 map->p_type = segment->p_type;
5759 map->p_flags = segment->p_flags;
5760 map->p_flags_valid = 1;
5761 map->p_paddr = suggested_lma;
5762 map->p_paddr_valid = p_paddr_valid;
5763 map->includes_filehdr = 0;
5764 map->includes_phdrs = 0;
5767 while (isec < section_count);
5772 elf_tdata (obfd)->segment_map = map_first;
5774 /* If we had to estimate the number of program headers that were
5775 going to be needed, then check our estimate now and adjust
5776 the offset if necessary. */
5777 if (phdr_adjust_seg != NULL)
5781 for (count = 0, map = map_first; map != NULL; map = map->next)
5784 if (count > phdr_adjust_num)
5785 phdr_adjust_seg->p_paddr
5786 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5791 #undef IS_CONTAINED_BY_VMA
5792 #undef IS_CONTAINED_BY_LMA
5794 #undef IS_COREFILE_NOTE
5795 #undef IS_SOLARIS_PT_INTERP
5796 #undef IS_SECTION_IN_INPUT_SEGMENT
5797 #undef INCLUDE_SECTION_IN_SEGMENT
5798 #undef SEGMENT_AFTER_SEGMENT
5799 #undef SEGMENT_OVERLAPS
5803 /* Copy ELF program header information. */
5806 copy_elf_program_header (bfd *ibfd, bfd *obfd)
5808 Elf_Internal_Ehdr *iehdr;
5809 struct elf_segment_map *map;
5810 struct elf_segment_map *map_first;
5811 struct elf_segment_map **pointer_to_map;
5812 Elf_Internal_Phdr *segment;
5814 unsigned int num_segments;
5815 bfd_boolean phdr_included = FALSE;
5816 bfd_boolean p_paddr_valid;
5818 iehdr = elf_elfheader (ibfd);
5821 pointer_to_map = &map_first;
5823 /* If all the segment p_paddr fields are zero, don't set
5824 map->p_paddr_valid. */
5825 p_paddr_valid = FALSE;
5826 num_segments = elf_elfheader (ibfd)->e_phnum;
5827 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5830 if (segment->p_paddr != 0)
5832 p_paddr_valid = TRUE;
5836 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5841 unsigned int section_count;
5843 Elf_Internal_Shdr *this_hdr;
5844 asection *first_section = NULL;
5845 asection *lowest_section = NULL;
5847 /* Compute how many sections are in this segment. */
5848 for (section = ibfd->sections, section_count = 0;
5850 section = section->next)
5852 this_hdr = &(elf_section_data(section)->this_hdr);
5853 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5856 first_section = lowest_section = section;
5857 if (section->lma < lowest_section->lma)
5858 lowest_section = section;
5863 /* Allocate a segment map big enough to contain
5864 all of the sections we have selected. */
5865 amt = sizeof (struct elf_segment_map);
5866 if (section_count != 0)
5867 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5868 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
5872 /* Initialize the fields of the output segment map with the
5875 map->p_type = segment->p_type;
5876 map->p_flags = segment->p_flags;
5877 map->p_flags_valid = 1;
5878 map->p_paddr = segment->p_paddr;
5879 map->p_paddr_valid = p_paddr_valid;
5880 map->p_align = segment->p_align;
5881 map->p_align_valid = 1;
5882 map->p_vaddr_offset = 0;
5884 if (map->p_type == PT_GNU_RELRO)
5886 /* The PT_GNU_RELRO segment may contain the first a few
5887 bytes in the .got.plt section even if the whole .got.plt
5888 section isn't in the PT_GNU_RELRO segment. We won't
5889 change the size of the PT_GNU_RELRO segment. */
5890 map->p_size = segment->p_memsz;
5891 map->p_size_valid = 1;
5894 /* Determine if this segment contains the ELF file header
5895 and if it contains the program headers themselves. */
5896 map->includes_filehdr = (segment->p_offset == 0
5897 && segment->p_filesz >= iehdr->e_ehsize);
5899 map->includes_phdrs = 0;
5900 if (! phdr_included || segment->p_type != PT_LOAD)
5902 map->includes_phdrs =
5903 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5904 && (segment->p_offset + segment->p_filesz
5905 >= ((bfd_vma) iehdr->e_phoff
5906 + iehdr->e_phnum * iehdr->e_phentsize)));
5908 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5909 phdr_included = TRUE;
5912 if (map->includes_filehdr && first_section)
5913 /* We need to keep the space used by the headers fixed. */
5914 map->header_size = first_section->vma - segment->p_vaddr;
5916 if (!map->includes_phdrs
5917 && !map->includes_filehdr
5918 && map->p_paddr_valid)
5919 /* There is some other padding before the first section. */
5920 map->p_vaddr_offset = ((lowest_section ? lowest_section->lma : 0)
5921 - segment->p_paddr);
5923 if (section_count != 0)
5925 unsigned int isec = 0;
5927 for (section = first_section;
5929 section = section->next)
5931 this_hdr = &(elf_section_data(section)->this_hdr);
5932 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5934 map->sections[isec++] = section->output_section;
5935 if (isec == section_count)
5941 map->count = section_count;
5942 *pointer_to_map = map;
5943 pointer_to_map = &map->next;
5946 elf_tdata (obfd)->segment_map = map_first;
5950 /* Copy private BFD data. This copies or rewrites ELF program header
5954 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
5956 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5957 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5960 if (elf_tdata (ibfd)->phdr == NULL)
5963 if (ibfd->xvec == obfd->xvec)
5965 /* Check to see if any sections in the input BFD
5966 covered by ELF program header have changed. */
5967 Elf_Internal_Phdr *segment;
5968 asection *section, *osec;
5969 unsigned int i, num_segments;
5970 Elf_Internal_Shdr *this_hdr;
5971 const struct elf_backend_data *bed;
5973 bed = get_elf_backend_data (ibfd);
5975 /* Regenerate the segment map if p_paddr is set to 0. */
5976 if (bed->want_p_paddr_set_to_zero)
5979 /* Initialize the segment mark field. */
5980 for (section = obfd->sections; section != NULL;
5981 section = section->next)
5982 section->segment_mark = FALSE;
5984 num_segments = elf_elfheader (ibfd)->e_phnum;
5985 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5989 /* PR binutils/3535. The Solaris linker always sets the p_paddr
5990 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
5991 which severly confuses things, so always regenerate the segment
5992 map in this case. */
5993 if (segment->p_paddr == 0
5994 && segment->p_memsz == 0
5995 && (segment->p_type == PT_INTERP || segment->p_type == PT_DYNAMIC))
5998 for (section = ibfd->sections;
5999 section != NULL; section = section->next)
6001 /* We mark the output section so that we know it comes
6002 from the input BFD. */
6003 osec = section->output_section;
6005 osec->segment_mark = TRUE;
6007 /* Check if this section is covered by the segment. */
6008 this_hdr = &(elf_section_data(section)->this_hdr);
6009 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
6011 /* FIXME: Check if its output section is changed or
6012 removed. What else do we need to check? */
6014 || section->flags != osec->flags
6015 || section->lma != osec->lma
6016 || section->vma != osec->vma
6017 || section->size != osec->size
6018 || section->rawsize != osec->rawsize
6019 || section->alignment_power != osec->alignment_power)
6025 /* Check to see if any output section do not come from the
6027 for (section = obfd->sections; section != NULL;
6028 section = section->next)
6030 if (section->segment_mark == FALSE)
6033 section->segment_mark = FALSE;
6036 return copy_elf_program_header (ibfd, obfd);
6040 return rewrite_elf_program_header (ibfd, obfd);
6043 /* Initialize private output section information from input section. */
6046 _bfd_elf_init_private_section_data (bfd *ibfd,
6050 struct bfd_link_info *link_info)
6053 Elf_Internal_Shdr *ihdr, *ohdr;
6054 bfd_boolean final_link = link_info != NULL && !link_info->relocatable;
6056 if (ibfd->xvec->flavour != bfd_target_elf_flavour
6057 || obfd->xvec->flavour != bfd_target_elf_flavour)
6060 /* For objcopy and relocatable link, don't copy the output ELF
6061 section type from input if the output BFD section flags have been
6062 set to something different. For a final link allow some flags
6063 that the linker clears to differ. */
6064 if (elf_section_type (osec) == SHT_NULL
6065 && (osec->flags == isec->flags
6067 && ((osec->flags ^ isec->flags)
6068 & ~ (SEC_LINK_ONCE | SEC_LINK_DUPLICATES)) == 0)))
6069 elf_section_type (osec) = elf_section_type (isec);
6071 /* FIXME: Is this correct for all OS/PROC specific flags? */
6072 elf_section_flags (osec) |= (elf_section_flags (isec)
6073 & (SHF_MASKOS | SHF_MASKPROC));
6075 /* Set things up for objcopy and relocatable link. The output
6076 SHT_GROUP section will have its elf_next_in_group pointing back
6077 to the input group members. Ignore linker created group section.
6078 See elfNN_ia64_object_p in elfxx-ia64.c. */
6081 if (elf_sec_group (isec) == NULL
6082 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)
6084 if (elf_section_flags (isec) & SHF_GROUP)
6085 elf_section_flags (osec) |= SHF_GROUP;
6086 elf_next_in_group (osec) = elf_next_in_group (isec);
6087 elf_section_data (osec)->group = elf_section_data (isec)->group;
6091 ihdr = &elf_section_data (isec)->this_hdr;
6093 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
6094 don't use the output section of the linked-to section since it
6095 may be NULL at this point. */
6096 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
6098 ohdr = &elf_section_data (osec)->this_hdr;
6099 ohdr->sh_flags |= SHF_LINK_ORDER;
6100 elf_linked_to_section (osec) = elf_linked_to_section (isec);
6103 osec->use_rela_p = isec->use_rela_p;
6108 /* Copy private section information. This copies over the entsize
6109 field, and sometimes the info field. */
6112 _bfd_elf_copy_private_section_data (bfd *ibfd,
6117 Elf_Internal_Shdr *ihdr, *ohdr;
6119 if (ibfd->xvec->flavour != bfd_target_elf_flavour
6120 || obfd->xvec->flavour != bfd_target_elf_flavour)
6123 ihdr = &elf_section_data (isec)->this_hdr;
6124 ohdr = &elf_section_data (osec)->this_hdr;
6126 ohdr->sh_entsize = ihdr->sh_entsize;
6128 if (ihdr->sh_type == SHT_SYMTAB
6129 || ihdr->sh_type == SHT_DYNSYM
6130 || ihdr->sh_type == SHT_GNU_verneed
6131 || ihdr->sh_type == SHT_GNU_verdef)
6132 ohdr->sh_info = ihdr->sh_info;
6134 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
6138 /* Look at all the SHT_GROUP sections in IBFD, making any adjustments
6139 necessary if we are removing either the SHT_GROUP section or any of
6140 the group member sections. DISCARDED is the value that a section's
6141 output_section has if the section will be discarded, NULL when this
6142 function is called from objcopy, bfd_abs_section_ptr when called
6146 _bfd_elf_fixup_group_sections (bfd *ibfd, asection *discarded)
6150 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
6151 if (elf_section_type (isec) == SHT_GROUP)
6153 asection *first = elf_next_in_group (isec);
6154 asection *s = first;
6155 bfd_size_type removed = 0;
6159 /* If this member section is being output but the
6160 SHT_GROUP section is not, then clear the group info
6161 set up by _bfd_elf_copy_private_section_data. */
6162 if (s->output_section != discarded
6163 && isec->output_section == discarded)
6165 elf_section_flags (s->output_section) &= ~SHF_GROUP;
6166 elf_group_name (s->output_section) = NULL;
6168 /* Conversely, if the member section is not being output
6169 but the SHT_GROUP section is, then adjust its size. */
6170 else if (s->output_section == discarded
6171 && isec->output_section != discarded)
6173 s = elf_next_in_group (s);
6179 if (discarded != NULL)
6181 /* If we've been called for ld -r, then we need to
6182 adjust the input section size. This function may
6183 be called multiple times, so save the original
6185 if (isec->rawsize == 0)
6186 isec->rawsize = isec->size;
6187 isec->size = isec->rawsize - removed;
6191 /* Adjust the output section size when called from
6193 isec->output_section->size -= removed;
6201 /* Copy private header information. */
6204 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
6206 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6207 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6210 /* Copy over private BFD data if it has not already been copied.
6211 This must be done here, rather than in the copy_private_bfd_data
6212 entry point, because the latter is called after the section
6213 contents have been set, which means that the program headers have
6214 already been worked out. */
6215 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
6217 if (! copy_private_bfd_data (ibfd, obfd))
6221 return _bfd_elf_fixup_group_sections (ibfd, NULL);
6224 /* Copy private symbol information. If this symbol is in a section
6225 which we did not map into a BFD section, try to map the section
6226 index correctly. We use special macro definitions for the mapped
6227 section indices; these definitions are interpreted by the
6228 swap_out_syms function. */
6230 #define MAP_ONESYMTAB (SHN_HIOS + 1)
6231 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
6232 #define MAP_STRTAB (SHN_HIOS + 3)
6233 #define MAP_SHSTRTAB (SHN_HIOS + 4)
6234 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
6237 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
6242 elf_symbol_type *isym, *osym;
6244 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6245 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6248 isym = elf_symbol_from (ibfd, isymarg);
6249 osym = elf_symbol_from (obfd, osymarg);
6252 && isym->internal_elf_sym.st_shndx != 0
6254 && bfd_is_abs_section (isym->symbol.section))
6258 shndx = isym->internal_elf_sym.st_shndx;
6259 if (shndx == elf_onesymtab (ibfd))
6260 shndx = MAP_ONESYMTAB;
6261 else if (shndx == elf_dynsymtab (ibfd))
6262 shndx = MAP_DYNSYMTAB;
6263 else if (shndx == elf_tdata (ibfd)->strtab_section)
6265 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
6266 shndx = MAP_SHSTRTAB;
6267 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
6268 shndx = MAP_SYM_SHNDX;
6269 osym->internal_elf_sym.st_shndx = shndx;
6275 /* Swap out the symbols. */
6278 swap_out_syms (bfd *abfd,
6279 struct bfd_strtab_hash **sttp,
6282 const struct elf_backend_data *bed;
6285 struct bfd_strtab_hash *stt;
6286 Elf_Internal_Shdr *symtab_hdr;
6287 Elf_Internal_Shdr *symtab_shndx_hdr;
6288 Elf_Internal_Shdr *symstrtab_hdr;
6289 bfd_byte *outbound_syms;
6290 bfd_byte *outbound_shndx;
6293 bfd_boolean name_local_sections;
6295 if (!elf_map_symbols (abfd))
6298 /* Dump out the symtabs. */
6299 stt = _bfd_elf_stringtab_init ();
6303 bed = get_elf_backend_data (abfd);
6304 symcount = bfd_get_symcount (abfd);
6305 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
6306 symtab_hdr->sh_type = SHT_SYMTAB;
6307 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
6308 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
6309 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
6310 symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
6312 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
6313 symstrtab_hdr->sh_type = SHT_STRTAB;
6315 outbound_syms = (bfd_byte *) bfd_alloc2 (abfd, 1 + symcount,
6316 bed->s->sizeof_sym);
6317 if (outbound_syms == NULL)
6319 _bfd_stringtab_free (stt);
6322 symtab_hdr->contents = outbound_syms;
6324 outbound_shndx = NULL;
6325 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
6326 if (symtab_shndx_hdr->sh_name != 0)
6328 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
6329 outbound_shndx = (bfd_byte *)
6330 bfd_zalloc2 (abfd, 1 + symcount, sizeof (Elf_External_Sym_Shndx));
6331 if (outbound_shndx == NULL)
6333 _bfd_stringtab_free (stt);
6337 symtab_shndx_hdr->contents = outbound_shndx;
6338 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
6339 symtab_shndx_hdr->sh_size = amt;
6340 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
6341 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
6344 /* Now generate the data (for "contents"). */
6346 /* Fill in zeroth symbol and swap it out. */
6347 Elf_Internal_Sym sym;
6353 sym.st_shndx = SHN_UNDEF;
6354 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6355 outbound_syms += bed->s->sizeof_sym;
6356 if (outbound_shndx != NULL)
6357 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6361 = (bed->elf_backend_name_local_section_symbols
6362 && bed->elf_backend_name_local_section_symbols (abfd));
6364 syms = bfd_get_outsymbols (abfd);
6365 for (idx = 0; idx < symcount; idx++)
6367 Elf_Internal_Sym sym;
6368 bfd_vma value = syms[idx]->value;
6369 elf_symbol_type *type_ptr;
6370 flagword flags = syms[idx]->flags;
6373 if (!name_local_sections
6374 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
6376 /* Local section symbols have no name. */
6381 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
6384 if (sym.st_name == (unsigned long) -1)
6386 _bfd_stringtab_free (stt);
6391 type_ptr = elf_symbol_from (abfd, syms[idx]);
6393 if ((flags & BSF_SECTION_SYM) == 0
6394 && bfd_is_com_section (syms[idx]->section))
6396 /* ELF common symbols put the alignment into the `value' field,
6397 and the size into the `size' field. This is backwards from
6398 how BFD handles it, so reverse it here. */
6399 sym.st_size = value;
6400 if (type_ptr == NULL
6401 || type_ptr->internal_elf_sym.st_value == 0)
6402 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
6404 sym.st_value = type_ptr->internal_elf_sym.st_value;
6405 sym.st_shndx = _bfd_elf_section_from_bfd_section
6406 (abfd, syms[idx]->section);
6410 asection *sec = syms[idx]->section;
6413 if (sec->output_section)
6415 value += sec->output_offset;
6416 sec = sec->output_section;
6419 /* Don't add in the section vma for relocatable output. */
6420 if (! relocatable_p)
6422 sym.st_value = value;
6423 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
6425 if (bfd_is_abs_section (sec)
6427 && type_ptr->internal_elf_sym.st_shndx != 0)
6429 /* This symbol is in a real ELF section which we did
6430 not create as a BFD section. Undo the mapping done
6431 by copy_private_symbol_data. */
6432 shndx = type_ptr->internal_elf_sym.st_shndx;
6436 shndx = elf_onesymtab (abfd);
6439 shndx = elf_dynsymtab (abfd);
6442 shndx = elf_tdata (abfd)->strtab_section;
6445 shndx = elf_tdata (abfd)->shstrtab_section;
6448 shndx = elf_tdata (abfd)->symtab_shndx_section;
6456 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
6458 if (shndx == SHN_BAD)
6462 /* Writing this would be a hell of a lot easier if
6463 we had some decent documentation on bfd, and
6464 knew what to expect of the library, and what to
6465 demand of applications. For example, it
6466 appears that `objcopy' might not set the
6467 section of a symbol to be a section that is
6468 actually in the output file. */
6469 sec2 = bfd_get_section_by_name (abfd, sec->name);
6472 _bfd_error_handler (_("\
6473 Unable to find equivalent output section for symbol '%s' from section '%s'"),
6474 syms[idx]->name ? syms[idx]->name : "<Local sym>",
6476 bfd_set_error (bfd_error_invalid_operation);
6477 _bfd_stringtab_free (stt);
6481 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
6482 BFD_ASSERT (shndx != SHN_BAD);
6486 sym.st_shndx = shndx;
6489 if ((flags & BSF_THREAD_LOCAL) != 0)
6491 else if ((flags & BSF_GNU_INDIRECT_FUNCTION) != 0)
6492 type = STT_GNU_IFUNC;
6493 else if ((flags & BSF_FUNCTION) != 0)
6495 else if ((flags & BSF_OBJECT) != 0)
6497 else if ((flags & BSF_RELC) != 0)
6499 else if ((flags & BSF_SRELC) != 0)
6504 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
6507 /* Processor-specific types. */
6508 if (type_ptr != NULL
6509 && bed->elf_backend_get_symbol_type)
6510 type = ((*bed->elf_backend_get_symbol_type)
6511 (&type_ptr->internal_elf_sym, type));
6513 if (flags & BSF_SECTION_SYM)
6515 if (flags & BSF_GLOBAL)
6516 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
6518 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
6520 else if (bfd_is_com_section (syms[idx]->section))
6522 #ifdef USE_STT_COMMON
6523 if (type == STT_OBJECT)
6524 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_COMMON);
6527 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
6529 else if (bfd_is_und_section (syms[idx]->section))
6530 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
6534 else if (flags & BSF_FILE)
6535 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
6538 int bind = STB_LOCAL;
6540 if (flags & BSF_LOCAL)
6542 else if (flags & BSF_GNU_UNIQUE)
6543 bind = STB_GNU_UNIQUE;
6544 else if (flags & BSF_WEAK)
6546 else if (flags & BSF_GLOBAL)
6549 sym.st_info = ELF_ST_INFO (bind, type);
6552 if (type_ptr != NULL)
6553 sym.st_other = type_ptr->internal_elf_sym.st_other;
6557 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6558 outbound_syms += bed->s->sizeof_sym;
6559 if (outbound_shndx != NULL)
6560 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6564 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
6565 symstrtab_hdr->sh_type = SHT_STRTAB;
6567 symstrtab_hdr->sh_flags = 0;
6568 symstrtab_hdr->sh_addr = 0;
6569 symstrtab_hdr->sh_entsize = 0;
6570 symstrtab_hdr->sh_link = 0;
6571 symstrtab_hdr->sh_info = 0;
6572 symstrtab_hdr->sh_addralign = 1;
6577 /* Return the number of bytes required to hold the symtab vector.
6579 Note that we base it on the count plus 1, since we will null terminate
6580 the vector allocated based on this size. However, the ELF symbol table
6581 always has a dummy entry as symbol #0, so it ends up even. */
6584 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
6588 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
6590 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6591 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6593 symtab_size -= sizeof (asymbol *);
6599 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
6603 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
6605 if (elf_dynsymtab (abfd) == 0)
6607 bfd_set_error (bfd_error_invalid_operation);
6611 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6612 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6614 symtab_size -= sizeof (asymbol *);
6620 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
6623 return (asect->reloc_count + 1) * sizeof (arelent *);
6626 /* Canonicalize the relocs. */
6629 _bfd_elf_canonicalize_reloc (bfd *abfd,
6636 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6638 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
6641 tblptr = section->relocation;
6642 for (i = 0; i < section->reloc_count; i++)
6643 *relptr++ = tblptr++;
6647 return section->reloc_count;
6651 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
6653 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6654 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
6657 bfd_get_symcount (abfd) = symcount;
6662 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
6663 asymbol **allocation)
6665 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6666 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
6669 bfd_get_dynamic_symcount (abfd) = symcount;
6673 /* Return the size required for the dynamic reloc entries. Any loadable
6674 section that was actually installed in the BFD, and has type SHT_REL
6675 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6676 dynamic reloc section. */
6679 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
6684 if (elf_dynsymtab (abfd) == 0)
6686 bfd_set_error (bfd_error_invalid_operation);
6690 ret = sizeof (arelent *);
6691 for (s = abfd->sections; s != NULL; s = s->next)
6692 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6693 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6694 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6695 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
6696 * sizeof (arelent *));
6701 /* Canonicalize the dynamic relocation entries. Note that we return the
6702 dynamic relocations as a single block, although they are actually
6703 associated with particular sections; the interface, which was
6704 designed for SunOS style shared libraries, expects that there is only
6705 one set of dynamic relocs. Any loadable section that was actually
6706 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6707 dynamic symbol table, is considered to be a dynamic reloc section. */
6710 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
6714 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6718 if (elf_dynsymtab (abfd) == 0)
6720 bfd_set_error (bfd_error_invalid_operation);
6724 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6726 for (s = abfd->sections; s != NULL; s = s->next)
6728 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6729 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6730 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6735 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
6737 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
6739 for (i = 0; i < count; i++)
6750 /* Read in the version information. */
6753 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
6755 bfd_byte *contents = NULL;
6756 unsigned int freeidx = 0;
6758 if (elf_dynverref (abfd) != 0)
6760 Elf_Internal_Shdr *hdr;
6761 Elf_External_Verneed *everneed;
6762 Elf_Internal_Verneed *iverneed;
6764 bfd_byte *contents_end;
6766 hdr = &elf_tdata (abfd)->dynverref_hdr;
6768 elf_tdata (abfd)->verref = (Elf_Internal_Verneed *)
6769 bfd_zalloc2 (abfd, hdr->sh_info, sizeof (Elf_Internal_Verneed));
6770 if (elf_tdata (abfd)->verref == NULL)
6773 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6775 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
6776 if (contents == NULL)
6778 error_return_verref:
6779 elf_tdata (abfd)->verref = NULL;
6780 elf_tdata (abfd)->cverrefs = 0;
6783 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6784 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6785 goto error_return_verref;
6787 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verneed))
6788 goto error_return_verref;
6790 BFD_ASSERT (sizeof (Elf_External_Verneed)
6791 == sizeof (Elf_External_Vernaux));
6792 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
6793 everneed = (Elf_External_Verneed *) contents;
6794 iverneed = elf_tdata (abfd)->verref;
6795 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6797 Elf_External_Vernaux *evernaux;
6798 Elf_Internal_Vernaux *ivernaux;
6801 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
6803 iverneed->vn_bfd = abfd;
6805 iverneed->vn_filename =
6806 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6808 if (iverneed->vn_filename == NULL)
6809 goto error_return_verref;
6811 if (iverneed->vn_cnt == 0)
6812 iverneed->vn_auxptr = NULL;
6815 iverneed->vn_auxptr = (struct elf_internal_vernaux *)
6816 bfd_alloc2 (abfd, iverneed->vn_cnt,
6817 sizeof (Elf_Internal_Vernaux));
6818 if (iverneed->vn_auxptr == NULL)
6819 goto error_return_verref;
6822 if (iverneed->vn_aux
6823 > (size_t) (contents_end - (bfd_byte *) everneed))
6824 goto error_return_verref;
6826 evernaux = ((Elf_External_Vernaux *)
6827 ((bfd_byte *) everneed + iverneed->vn_aux));
6828 ivernaux = iverneed->vn_auxptr;
6829 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
6831 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
6833 ivernaux->vna_nodename =
6834 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6835 ivernaux->vna_name);
6836 if (ivernaux->vna_nodename == NULL)
6837 goto error_return_verref;
6839 if (j + 1 < iverneed->vn_cnt)
6840 ivernaux->vna_nextptr = ivernaux + 1;
6842 ivernaux->vna_nextptr = NULL;
6844 if (ivernaux->vna_next
6845 > (size_t) (contents_end - (bfd_byte *) evernaux))
6846 goto error_return_verref;
6848 evernaux = ((Elf_External_Vernaux *)
6849 ((bfd_byte *) evernaux + ivernaux->vna_next));
6851 if (ivernaux->vna_other > freeidx)
6852 freeidx = ivernaux->vna_other;
6855 if (i + 1 < hdr->sh_info)
6856 iverneed->vn_nextref = iverneed + 1;
6858 iverneed->vn_nextref = NULL;
6860 if (iverneed->vn_next
6861 > (size_t) (contents_end - (bfd_byte *) everneed))
6862 goto error_return_verref;
6864 everneed = ((Elf_External_Verneed *)
6865 ((bfd_byte *) everneed + iverneed->vn_next));
6872 if (elf_dynverdef (abfd) != 0)
6874 Elf_Internal_Shdr *hdr;
6875 Elf_External_Verdef *everdef;
6876 Elf_Internal_Verdef *iverdef;
6877 Elf_Internal_Verdef *iverdefarr;
6878 Elf_Internal_Verdef iverdefmem;
6880 unsigned int maxidx;
6881 bfd_byte *contents_end_def, *contents_end_aux;
6883 hdr = &elf_tdata (abfd)->dynverdef_hdr;
6885 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
6886 if (contents == NULL)
6888 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6889 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6892 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verdef))
6895 BFD_ASSERT (sizeof (Elf_External_Verdef)
6896 >= sizeof (Elf_External_Verdaux));
6897 contents_end_def = contents + hdr->sh_size
6898 - sizeof (Elf_External_Verdef);
6899 contents_end_aux = contents + hdr->sh_size
6900 - sizeof (Elf_External_Verdaux);
6902 /* We know the number of entries in the section but not the maximum
6903 index. Therefore we have to run through all entries and find
6905 everdef = (Elf_External_Verdef *) contents;
6907 for (i = 0; i < hdr->sh_info; ++i)
6909 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6911 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
6912 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
6914 if (iverdefmem.vd_next
6915 > (size_t) (contents_end_def - (bfd_byte *) everdef))
6918 everdef = ((Elf_External_Verdef *)
6919 ((bfd_byte *) everdef + iverdefmem.vd_next));
6922 if (default_imported_symver)
6924 if (freeidx > maxidx)
6929 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
6930 bfd_zalloc2 (abfd, maxidx, sizeof (Elf_Internal_Verdef));
6931 if (elf_tdata (abfd)->verdef == NULL)
6934 elf_tdata (abfd)->cverdefs = maxidx;
6936 everdef = (Elf_External_Verdef *) contents;
6937 iverdefarr = elf_tdata (abfd)->verdef;
6938 for (i = 0; i < hdr->sh_info; i++)
6940 Elf_External_Verdaux *everdaux;
6941 Elf_Internal_Verdaux *iverdaux;
6944 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6946 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
6948 error_return_verdef:
6949 elf_tdata (abfd)->verdef = NULL;
6950 elf_tdata (abfd)->cverdefs = 0;
6954 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
6955 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
6957 iverdef->vd_bfd = abfd;
6959 if (iverdef->vd_cnt == 0)
6960 iverdef->vd_auxptr = NULL;
6963 iverdef->vd_auxptr = (struct elf_internal_verdaux *)
6964 bfd_alloc2 (abfd, iverdef->vd_cnt,
6965 sizeof (Elf_Internal_Verdaux));
6966 if (iverdef->vd_auxptr == NULL)
6967 goto error_return_verdef;
6971 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
6972 goto error_return_verdef;
6974 everdaux = ((Elf_External_Verdaux *)
6975 ((bfd_byte *) everdef + iverdef->vd_aux));
6976 iverdaux = iverdef->vd_auxptr;
6977 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
6979 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
6981 iverdaux->vda_nodename =
6982 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6983 iverdaux->vda_name);
6984 if (iverdaux->vda_nodename == NULL)
6985 goto error_return_verdef;
6987 if (j + 1 < iverdef->vd_cnt)
6988 iverdaux->vda_nextptr = iverdaux + 1;
6990 iverdaux->vda_nextptr = NULL;
6992 if (iverdaux->vda_next
6993 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
6994 goto error_return_verdef;
6996 everdaux = ((Elf_External_Verdaux *)
6997 ((bfd_byte *) everdaux + iverdaux->vda_next));
7000 if (iverdef->vd_cnt)
7001 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
7003 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
7004 iverdef->vd_nextdef = iverdef + 1;
7006 iverdef->vd_nextdef = NULL;
7008 everdef = ((Elf_External_Verdef *)
7009 ((bfd_byte *) everdef + iverdef->vd_next));
7015 else if (default_imported_symver)
7022 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
7023 bfd_zalloc2 (abfd, freeidx, sizeof (Elf_Internal_Verdef));
7024 if (elf_tdata (abfd)->verdef == NULL)
7027 elf_tdata (abfd)->cverdefs = freeidx;
7030 /* Create a default version based on the soname. */
7031 if (default_imported_symver)
7033 Elf_Internal_Verdef *iverdef;
7034 Elf_Internal_Verdaux *iverdaux;
7036 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];;
7038 iverdef->vd_version = VER_DEF_CURRENT;
7039 iverdef->vd_flags = 0;
7040 iverdef->vd_ndx = freeidx;
7041 iverdef->vd_cnt = 1;
7043 iverdef->vd_bfd = abfd;
7045 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
7046 if (iverdef->vd_nodename == NULL)
7047 goto error_return_verdef;
7048 iverdef->vd_nextdef = NULL;
7049 iverdef->vd_auxptr = (struct elf_internal_verdaux *)
7050 bfd_alloc (abfd, sizeof (Elf_Internal_Verdaux));
7051 if (iverdef->vd_auxptr == NULL)
7052 goto error_return_verdef;
7054 iverdaux = iverdef->vd_auxptr;
7055 iverdaux->vda_nodename = iverdef->vd_nodename;
7056 iverdaux->vda_nextptr = NULL;
7062 if (contents != NULL)
7068 _bfd_elf_make_empty_symbol (bfd *abfd)
7070 elf_symbol_type *newsym;
7071 bfd_size_type amt = sizeof (elf_symbol_type);
7073 newsym = (elf_symbol_type *) bfd_zalloc (abfd, amt);
7078 newsym->symbol.the_bfd = abfd;
7079 return &newsym->symbol;
7084 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
7088 bfd_symbol_info (symbol, ret);
7091 /* Return whether a symbol name implies a local symbol. Most targets
7092 use this function for the is_local_label_name entry point, but some
7096 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
7099 /* Normal local symbols start with ``.L''. */
7100 if (name[0] == '.' && name[1] == 'L')
7103 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
7104 DWARF debugging symbols starting with ``..''. */
7105 if (name[0] == '.' && name[1] == '.')
7108 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
7109 emitting DWARF debugging output. I suspect this is actually a
7110 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
7111 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
7112 underscore to be emitted on some ELF targets). For ease of use,
7113 we treat such symbols as local. */
7114 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
7121 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
7122 asymbol *symbol ATTRIBUTE_UNUSED)
7129 _bfd_elf_set_arch_mach (bfd *abfd,
7130 enum bfd_architecture arch,
7131 unsigned long machine)
7133 /* If this isn't the right architecture for this backend, and this
7134 isn't the generic backend, fail. */
7135 if (arch != get_elf_backend_data (abfd)->arch
7136 && arch != bfd_arch_unknown
7137 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
7140 return bfd_default_set_arch_mach (abfd, arch, machine);
7143 /* Find the function to a particular section and offset,
7144 for error reporting. */
7147 elf_find_function (bfd *abfd,
7151 const char **filename_ptr,
7152 const char **functionname_ptr)
7154 const char *filename;
7155 asymbol *func, *file;
7158 /* ??? Given multiple file symbols, it is impossible to reliably
7159 choose the right file name for global symbols. File symbols are
7160 local symbols, and thus all file symbols must sort before any
7161 global symbols. The ELF spec may be interpreted to say that a
7162 file symbol must sort before other local symbols, but currently
7163 ld -r doesn't do this. So, for ld -r output, it is possible to
7164 make a better choice of file name for local symbols by ignoring
7165 file symbols appearing after a given local symbol. */
7166 enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
7167 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7173 state = nothing_seen;
7175 for (p = symbols; *p != NULL; p++)
7180 q = (elf_symbol_type *) *p;
7182 type = ELF_ST_TYPE (q->internal_elf_sym.st_info);
7187 if (state == symbol_seen)
7188 state = file_after_symbol_seen;
7191 if (!bed->is_function_type (type))
7194 if (bfd_get_section (&q->symbol) == section
7195 && q->symbol.value >= low_func
7196 && q->symbol.value <= offset)
7198 func = (asymbol *) q;
7199 low_func = q->symbol.value;
7202 && (ELF_ST_BIND (q->internal_elf_sym.st_info) == STB_LOCAL
7203 || state != file_after_symbol_seen))
7204 filename = bfd_asymbol_name (file);
7208 if (state == nothing_seen)
7209 state = symbol_seen;
7216 *filename_ptr = filename;
7217 if (functionname_ptr)
7218 *functionname_ptr = bfd_asymbol_name (func);
7223 /* Find the nearest line to a particular section and offset,
7224 for error reporting. */
7227 _bfd_elf_find_nearest_line (bfd *abfd,
7231 const char **filename_ptr,
7232 const char **functionname_ptr,
7233 unsigned int *line_ptr)
7237 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
7238 filename_ptr, functionname_ptr,
7241 if (!*functionname_ptr)
7242 elf_find_function (abfd, section, symbols, offset,
7243 *filename_ptr ? NULL : filename_ptr,
7249 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
7250 filename_ptr, functionname_ptr,
7252 &elf_tdata (abfd)->dwarf2_find_line_info))
7254 if (!*functionname_ptr)
7255 elf_find_function (abfd, section, symbols, offset,
7256 *filename_ptr ? NULL : filename_ptr,
7262 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
7263 &found, filename_ptr,
7264 functionname_ptr, line_ptr,
7265 &elf_tdata (abfd)->line_info))
7267 if (found && (*functionname_ptr || *line_ptr))
7270 if (symbols == NULL)
7273 if (! elf_find_function (abfd, section, symbols, offset,
7274 filename_ptr, functionname_ptr))
7281 /* Find the line for a symbol. */
7284 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
7285 const char **filename_ptr, unsigned int *line_ptr)
7287 return _bfd_dwarf2_find_line (abfd, symbols, symbol,
7288 filename_ptr, line_ptr, 0,
7289 &elf_tdata (abfd)->dwarf2_find_line_info);
7292 /* After a call to bfd_find_nearest_line, successive calls to
7293 bfd_find_inliner_info can be used to get source information about
7294 each level of function inlining that terminated at the address
7295 passed to bfd_find_nearest_line. Currently this is only supported
7296 for DWARF2 with appropriate DWARF3 extensions. */
7299 _bfd_elf_find_inliner_info (bfd *abfd,
7300 const char **filename_ptr,
7301 const char **functionname_ptr,
7302 unsigned int *line_ptr)
7305 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
7306 functionname_ptr, line_ptr,
7307 & elf_tdata (abfd)->dwarf2_find_line_info);
7312 _bfd_elf_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
7314 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7315 int ret = bed->s->sizeof_ehdr;
7317 if (!info->relocatable)
7319 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
7321 if (phdr_size == (bfd_size_type) -1)
7323 struct elf_segment_map *m;
7326 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
7327 phdr_size += bed->s->sizeof_phdr;
7330 phdr_size = get_program_header_size (abfd, info);
7333 elf_tdata (abfd)->program_header_size = phdr_size;
7341 _bfd_elf_set_section_contents (bfd *abfd,
7343 const void *location,
7345 bfd_size_type count)
7347 Elf_Internal_Shdr *hdr;
7350 if (! abfd->output_has_begun
7351 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
7354 hdr = &elf_section_data (section)->this_hdr;
7355 pos = hdr->sh_offset + offset;
7356 if (bfd_seek (abfd, pos, SEEK_SET) != 0
7357 || bfd_bwrite (location, count, abfd) != count)
7364 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
7365 arelent *cache_ptr ATTRIBUTE_UNUSED,
7366 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
7371 /* Try to convert a non-ELF reloc into an ELF one. */
7374 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
7376 /* Check whether we really have an ELF howto. */
7378 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
7380 bfd_reloc_code_real_type code;
7381 reloc_howto_type *howto;
7383 /* Alien reloc: Try to determine its type to replace it with an
7384 equivalent ELF reloc. */
7386 if (areloc->howto->pc_relative)
7388 switch (areloc->howto->bitsize)
7391 code = BFD_RELOC_8_PCREL;
7394 code = BFD_RELOC_12_PCREL;
7397 code = BFD_RELOC_16_PCREL;
7400 code = BFD_RELOC_24_PCREL;
7403 code = BFD_RELOC_32_PCREL;
7406 code = BFD_RELOC_64_PCREL;
7412 howto = bfd_reloc_type_lookup (abfd, code);
7414 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
7416 if (howto->pcrel_offset)
7417 areloc->addend += areloc->address;
7419 areloc->addend -= areloc->address; /* addend is unsigned!! */
7424 switch (areloc->howto->bitsize)
7430 code = BFD_RELOC_14;
7433 code = BFD_RELOC_16;
7436 code = BFD_RELOC_26;
7439 code = BFD_RELOC_32;
7442 code = BFD_RELOC_64;
7448 howto = bfd_reloc_type_lookup (abfd, code);
7452 areloc->howto = howto;
7460 (*_bfd_error_handler)
7461 (_("%B: unsupported relocation type %s"),
7462 abfd, areloc->howto->name);
7463 bfd_set_error (bfd_error_bad_value);
7468 _bfd_elf_close_and_cleanup (bfd *abfd)
7470 if (bfd_get_format (abfd) == bfd_object)
7472 if (elf_tdata (abfd) != NULL && elf_shstrtab (abfd) != NULL)
7473 _bfd_elf_strtab_free (elf_shstrtab (abfd));
7474 _bfd_dwarf2_cleanup_debug_info (abfd);
7477 return _bfd_generic_close_and_cleanup (abfd);
7480 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
7481 in the relocation's offset. Thus we cannot allow any sort of sanity
7482 range-checking to interfere. There is nothing else to do in processing
7485 bfd_reloc_status_type
7486 _bfd_elf_rel_vtable_reloc_fn
7487 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
7488 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
7489 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
7490 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
7492 return bfd_reloc_ok;
7495 /* Elf core file support. Much of this only works on native
7496 toolchains, since we rely on knowing the
7497 machine-dependent procfs structure in order to pick
7498 out details about the corefile. */
7500 #ifdef HAVE_SYS_PROCFS_H
7501 /* Needed for new procfs interface on sparc-solaris. */
7502 # define _STRUCTURED_PROC 1
7503 # include <sys/procfs.h>
7506 /* FIXME: this is kinda wrong, but it's what gdb wants. */
7509 elfcore_make_pid (bfd *abfd)
7511 return ((elf_tdata (abfd)->core_lwpid << 16)
7512 + (elf_tdata (abfd)->core_pid));
7515 /* If there isn't a section called NAME, make one, using
7516 data from SECT. Note, this function will generate a
7517 reference to NAME, so you shouldn't deallocate or
7521 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
7525 if (bfd_get_section_by_name (abfd, name) != NULL)
7528 sect2 = bfd_make_section_with_flags (abfd, name, sect->flags);
7532 sect2->size = sect->size;
7533 sect2->filepos = sect->filepos;
7534 sect2->alignment_power = sect->alignment_power;
7538 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
7539 actually creates up to two pseudosections:
7540 - For the single-threaded case, a section named NAME, unless
7541 such a section already exists.
7542 - For the multi-threaded case, a section named "NAME/PID", where
7543 PID is elfcore_make_pid (abfd).
7544 Both pseudosections have identical contents. */
7546 _bfd_elfcore_make_pseudosection (bfd *abfd,
7552 char *threaded_name;
7556 /* Build the section name. */
7558 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
7559 len = strlen (buf) + 1;
7560 threaded_name = (char *) bfd_alloc (abfd, len);
7561 if (threaded_name == NULL)
7563 memcpy (threaded_name, buf, len);
7565 sect = bfd_make_section_anyway_with_flags (abfd, threaded_name,
7570 sect->filepos = filepos;
7571 sect->alignment_power = 2;
7573 return elfcore_maybe_make_sect (abfd, name, sect);
7576 /* prstatus_t exists on:
7578 linux 2.[01] + glibc
7582 #if defined (HAVE_PRSTATUS_T)
7585 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
7590 if (note->descsz == sizeof (prstatus_t))
7594 size = sizeof (prstat.pr_reg);
7595 offset = offsetof (prstatus_t, pr_reg);
7596 memcpy (&prstat, note->descdata, sizeof (prstat));
7598 /* Do not overwrite the core signal if it
7599 has already been set by another thread. */
7600 if (elf_tdata (abfd)->core_signal == 0)
7601 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7602 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7604 /* pr_who exists on:
7607 pr_who doesn't exist on:
7610 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7611 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7614 #if defined (HAVE_PRSTATUS32_T)
7615 else if (note->descsz == sizeof (prstatus32_t))
7617 /* 64-bit host, 32-bit corefile */
7618 prstatus32_t prstat;
7620 size = sizeof (prstat.pr_reg);
7621 offset = offsetof (prstatus32_t, pr_reg);
7622 memcpy (&prstat, note->descdata, sizeof (prstat));
7624 /* Do not overwrite the core signal if it
7625 has already been set by another thread. */
7626 if (elf_tdata (abfd)->core_signal == 0)
7627 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7628 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7630 /* pr_who exists on:
7633 pr_who doesn't exist on:
7636 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7637 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7640 #endif /* HAVE_PRSTATUS32_T */
7643 /* Fail - we don't know how to handle any other
7644 note size (ie. data object type). */
7648 /* Make a ".reg/999" section and a ".reg" section. */
7649 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
7650 size, note->descpos + offset);
7652 #endif /* defined (HAVE_PRSTATUS_T) */
7654 /* Create a pseudosection containing the exact contents of NOTE. */
7656 elfcore_make_note_pseudosection (bfd *abfd,
7658 Elf_Internal_Note *note)
7660 return _bfd_elfcore_make_pseudosection (abfd, name,
7661 note->descsz, note->descpos);
7664 /* There isn't a consistent prfpregset_t across platforms,
7665 but it doesn't matter, because we don't have to pick this
7666 data structure apart. */
7669 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
7671 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7674 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7675 type of NT_PRXFPREG. Just include the whole note's contents
7679 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
7681 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
7684 /* Linux dumps the Intel XSAVE extended state in a note named "LINUX"
7685 with a note type of NT_X86_XSTATE. Just include the whole note's
7686 contents literally. */
7689 elfcore_grok_xstatereg (bfd *abfd, Elf_Internal_Note *note)
7691 return elfcore_make_note_pseudosection (abfd, ".reg-xstate", note);
7695 elfcore_grok_ppc_vmx (bfd *abfd, Elf_Internal_Note *note)
7697 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vmx", note);
7701 elfcore_grok_ppc_vsx (bfd *abfd, Elf_Internal_Note *note)
7703 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vsx", note);
7707 elfcore_grok_s390_high_gprs (bfd *abfd, Elf_Internal_Note *note)
7709 return elfcore_make_note_pseudosection (abfd, ".reg-s390-high-gprs", note);
7713 elfcore_grok_s390_timer (bfd *abfd, Elf_Internal_Note *note)
7715 return elfcore_make_note_pseudosection (abfd, ".reg-s390-timer", note);
7719 elfcore_grok_s390_todcmp (bfd *abfd, Elf_Internal_Note *note)
7721 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todcmp", note);
7725 elfcore_grok_s390_todpreg (bfd *abfd, Elf_Internal_Note *note)
7727 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todpreg", note);
7731 elfcore_grok_s390_ctrs (bfd *abfd, Elf_Internal_Note *note)
7733 return elfcore_make_note_pseudosection (abfd, ".reg-s390-ctrs", note);
7737 elfcore_grok_s390_prefix (bfd *abfd, Elf_Internal_Note *note)
7739 return elfcore_make_note_pseudosection (abfd, ".reg-s390-prefix", note);
7742 #if defined (HAVE_PRPSINFO_T)
7743 typedef prpsinfo_t elfcore_psinfo_t;
7744 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7745 typedef prpsinfo32_t elfcore_psinfo32_t;
7749 #if defined (HAVE_PSINFO_T)
7750 typedef psinfo_t elfcore_psinfo_t;
7751 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7752 typedef psinfo32_t elfcore_psinfo32_t;
7756 /* return a malloc'ed copy of a string at START which is at
7757 most MAX bytes long, possibly without a terminating '\0'.
7758 the copy will always have a terminating '\0'. */
7761 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
7764 char *end = (char *) memchr (start, '\0', max);
7772 dups = (char *) bfd_alloc (abfd, len + 1);
7776 memcpy (dups, start, len);
7782 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7784 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
7786 if (note->descsz == sizeof (elfcore_psinfo_t))
7788 elfcore_psinfo_t psinfo;
7790 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7792 elf_tdata (abfd)->core_program
7793 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7794 sizeof (psinfo.pr_fname));
7796 elf_tdata (abfd)->core_command
7797 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7798 sizeof (psinfo.pr_psargs));
7800 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7801 else if (note->descsz == sizeof (elfcore_psinfo32_t))
7803 /* 64-bit host, 32-bit corefile */
7804 elfcore_psinfo32_t psinfo;
7806 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7808 elf_tdata (abfd)->core_program
7809 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7810 sizeof (psinfo.pr_fname));
7812 elf_tdata (abfd)->core_command
7813 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7814 sizeof (psinfo.pr_psargs));
7820 /* Fail - we don't know how to handle any other
7821 note size (ie. data object type). */
7825 /* Note that for some reason, a spurious space is tacked
7826 onto the end of the args in some (at least one anyway)
7827 implementations, so strip it off if it exists. */
7830 char *command = elf_tdata (abfd)->core_command;
7831 int n = strlen (command);
7833 if (0 < n && command[n - 1] == ' ')
7834 command[n - 1] = '\0';
7839 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7841 #if defined (HAVE_PSTATUS_T)
7843 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
7845 if (note->descsz == sizeof (pstatus_t)
7846 #if defined (HAVE_PXSTATUS_T)
7847 || note->descsz == sizeof (pxstatus_t)
7853 memcpy (&pstat, note->descdata, sizeof (pstat));
7855 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7857 #if defined (HAVE_PSTATUS32_T)
7858 else if (note->descsz == sizeof (pstatus32_t))
7860 /* 64-bit host, 32-bit corefile */
7863 memcpy (&pstat, note->descdata, sizeof (pstat));
7865 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7868 /* Could grab some more details from the "representative"
7869 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7870 NT_LWPSTATUS note, presumably. */
7874 #endif /* defined (HAVE_PSTATUS_T) */
7876 #if defined (HAVE_LWPSTATUS_T)
7878 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
7880 lwpstatus_t lwpstat;
7886 if (note->descsz != sizeof (lwpstat)
7887 #if defined (HAVE_LWPXSTATUS_T)
7888 && note->descsz != sizeof (lwpxstatus_t)
7893 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
7895 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
7896 /* Do not overwrite the core signal if it has already been set by
7898 if (elf_tdata (abfd)->core_signal == 0)
7899 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
7901 /* Make a ".reg/999" section. */
7903 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
7904 len = strlen (buf) + 1;
7905 name = bfd_alloc (abfd, len);
7908 memcpy (name, buf, len);
7910 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7914 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7915 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
7916 sect->filepos = note->descpos
7917 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
7920 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7921 sect->size = sizeof (lwpstat.pr_reg);
7922 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
7925 sect->alignment_power = 2;
7927 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
7930 /* Make a ".reg2/999" section */
7932 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
7933 len = strlen (buf) + 1;
7934 name = bfd_alloc (abfd, len);
7937 memcpy (name, buf, len);
7939 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7943 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7944 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
7945 sect->filepos = note->descpos
7946 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
7949 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7950 sect->size = sizeof (lwpstat.pr_fpreg);
7951 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
7954 sect->alignment_power = 2;
7956 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
7958 #endif /* defined (HAVE_LWPSTATUS_T) */
7961 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
7968 int is_active_thread;
7971 if (note->descsz < 728)
7974 if (! CONST_STRNEQ (note->namedata, "win32"))
7977 type = bfd_get_32 (abfd, note->descdata);
7981 case 1 /* NOTE_INFO_PROCESS */:
7982 /* FIXME: need to add ->core_command. */
7983 /* process_info.pid */
7984 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 8);
7985 /* process_info.signal */
7986 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 12);
7989 case 2 /* NOTE_INFO_THREAD */:
7990 /* Make a ".reg/999" section. */
7991 /* thread_info.tid */
7992 sprintf (buf, ".reg/%ld", (long) bfd_get_32 (abfd, note->descdata + 8));
7994 len = strlen (buf) + 1;
7995 name = (char *) bfd_alloc (abfd, len);
7999 memcpy (name, buf, len);
8001 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8005 /* sizeof (thread_info.thread_context) */
8007 /* offsetof (thread_info.thread_context) */
8008 sect->filepos = note->descpos + 12;
8009 sect->alignment_power = 2;
8011 /* thread_info.is_active_thread */
8012 is_active_thread = bfd_get_32 (abfd, note->descdata + 8);
8014 if (is_active_thread)
8015 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
8019 case 3 /* NOTE_INFO_MODULE */:
8020 /* Make a ".module/xxxxxxxx" section. */
8021 /* module_info.base_address */
8022 base_addr = bfd_get_32 (abfd, note->descdata + 4);
8023 sprintf (buf, ".module/%08lx", (unsigned long) base_addr);
8025 len = strlen (buf) + 1;
8026 name = (char *) bfd_alloc (abfd, len);
8030 memcpy (name, buf, len);
8032 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8037 sect->size = note->descsz;
8038 sect->filepos = note->descpos;
8039 sect->alignment_power = 2;
8050 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
8052 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8060 if (bed->elf_backend_grok_prstatus)
8061 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
8063 #if defined (HAVE_PRSTATUS_T)
8064 return elfcore_grok_prstatus (abfd, note);
8069 #if defined (HAVE_PSTATUS_T)
8071 return elfcore_grok_pstatus (abfd, note);
8074 #if defined (HAVE_LWPSTATUS_T)
8076 return elfcore_grok_lwpstatus (abfd, note);
8079 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
8080 return elfcore_grok_prfpreg (abfd, note);
8082 case NT_WIN32PSTATUS:
8083 return elfcore_grok_win32pstatus (abfd, note);
8085 case NT_PRXFPREG: /* Linux SSE extension */
8086 if (note->namesz == 6
8087 && strcmp (note->namedata, "LINUX") == 0)
8088 return elfcore_grok_prxfpreg (abfd, note);
8092 case NT_X86_XSTATE: /* Linux XSAVE extension */
8093 if (note->namesz == 6
8094 && strcmp (note->namedata, "LINUX") == 0)
8095 return elfcore_grok_xstatereg (abfd, note);
8100 if (note->namesz == 6
8101 && strcmp (note->namedata, "LINUX") == 0)
8102 return elfcore_grok_ppc_vmx (abfd, note);
8107 if (note->namesz == 6
8108 && strcmp (note->namedata, "LINUX") == 0)
8109 return elfcore_grok_ppc_vsx (abfd, note);
8113 case NT_S390_HIGH_GPRS:
8114 if (note->namesz == 6
8115 && strcmp (note->namedata, "LINUX") == 0)
8116 return elfcore_grok_s390_high_gprs (abfd, note);
8121 if (note->namesz == 6
8122 && strcmp (note->namedata, "LINUX") == 0)
8123 return elfcore_grok_s390_timer (abfd, note);
8127 case NT_S390_TODCMP:
8128 if (note->namesz == 6
8129 && strcmp (note->namedata, "LINUX") == 0)
8130 return elfcore_grok_s390_todcmp (abfd, note);
8134 case NT_S390_TODPREG:
8135 if (note->namesz == 6
8136 && strcmp (note->namedata, "LINUX") == 0)
8137 return elfcore_grok_s390_todpreg (abfd, note);
8142 if (note->namesz == 6
8143 && strcmp (note->namedata, "LINUX") == 0)
8144 return elfcore_grok_s390_ctrs (abfd, note);
8148 case NT_S390_PREFIX:
8149 if (note->namesz == 6
8150 && strcmp (note->namedata, "LINUX") == 0)
8151 return elfcore_grok_s390_prefix (abfd, note);
8157 if (bed->elf_backend_grok_psinfo)
8158 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
8160 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8161 return elfcore_grok_psinfo (abfd, note);
8168 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
8173 sect->size = note->descsz;
8174 sect->filepos = note->descpos;
8175 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8183 elfobj_grok_gnu_build_id (bfd *abfd, Elf_Internal_Note *note)
8185 elf_tdata (abfd)->build_id_size = note->descsz;
8186 elf_tdata (abfd)->build_id = (bfd_byte *) bfd_alloc (abfd, note->descsz);
8187 if (elf_tdata (abfd)->build_id == NULL)
8190 memcpy (elf_tdata (abfd)->build_id, note->descdata, note->descsz);
8196 elfobj_grok_gnu_note (bfd *abfd, Elf_Internal_Note *note)
8203 case NT_GNU_BUILD_ID:
8204 return elfobj_grok_gnu_build_id (abfd, note);
8209 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
8213 cp = strchr (note->namedata, '@');
8216 *lwpidp = atoi(cp + 1);
8223 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
8225 /* Signal number at offset 0x08. */
8226 elf_tdata (abfd)->core_signal
8227 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
8229 /* Process ID at offset 0x50. */
8230 elf_tdata (abfd)->core_pid
8231 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
8233 /* Command name at 0x7c (max 32 bytes, including nul). */
8234 elf_tdata (abfd)->core_command
8235 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
8237 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
8242 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
8246 if (elfcore_netbsd_get_lwpid (note, &lwp))
8247 elf_tdata (abfd)->core_lwpid = lwp;
8249 if (note->type == NT_NETBSDCORE_PROCINFO)
8251 /* NetBSD-specific core "procinfo". Note that we expect to
8252 find this note before any of the others, which is fine,
8253 since the kernel writes this note out first when it
8254 creates a core file. */
8256 return elfcore_grok_netbsd_procinfo (abfd, note);
8259 /* As of Jan 2002 there are no other machine-independent notes
8260 defined for NetBSD core files. If the note type is less
8261 than the start of the machine-dependent note types, we don't
8264 if (note->type < NT_NETBSDCORE_FIRSTMACH)
8268 switch (bfd_get_arch (abfd))
8270 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
8271 PT_GETFPREGS == mach+2. */
8273 case bfd_arch_alpha:
8274 case bfd_arch_sparc:
8277 case NT_NETBSDCORE_FIRSTMACH+0:
8278 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8280 case NT_NETBSDCORE_FIRSTMACH+2:
8281 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8287 /* On all other arch's, PT_GETREGS == mach+1 and
8288 PT_GETFPREGS == mach+3. */
8293 case NT_NETBSDCORE_FIRSTMACH+1:
8294 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8296 case NT_NETBSDCORE_FIRSTMACH+3:
8297 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8307 elfcore_grok_openbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
8309 /* Signal number at offset 0x08. */
8310 elf_tdata (abfd)->core_signal
8311 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
8313 /* Process ID at offset 0x20. */
8314 elf_tdata (abfd)->core_pid
8315 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x20);
8317 /* Command name at 0x48 (max 32 bytes, including nul). */
8318 elf_tdata (abfd)->core_command
8319 = _bfd_elfcore_strndup (abfd, note->descdata + 0x48, 31);
8325 elfcore_grok_openbsd_note (bfd *abfd, Elf_Internal_Note *note)
8327 if (note->type == NT_OPENBSD_PROCINFO)
8328 return elfcore_grok_openbsd_procinfo (abfd, note);
8330 if (note->type == NT_OPENBSD_REGS)
8331 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8333 if (note->type == NT_OPENBSD_FPREGS)
8334 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8336 if (note->type == NT_OPENBSD_XFPREGS)
8337 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
8339 if (note->type == NT_OPENBSD_AUXV)
8341 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
8346 sect->size = note->descsz;
8347 sect->filepos = note->descpos;
8348 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8353 if (note->type == NT_OPENBSD_WCOOKIE)
8355 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".wcookie",
8360 sect->size = note->descsz;
8361 sect->filepos = note->descpos;
8362 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8371 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, long *tid)
8373 void *ddata = note->descdata;
8380 /* nto_procfs_status 'pid' field is at offset 0. */
8381 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
8383 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
8384 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
8386 /* nto_procfs_status 'flags' field is at offset 8. */
8387 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
8389 /* nto_procfs_status 'what' field is at offset 14. */
8390 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
8392 elf_tdata (abfd)->core_signal = sig;
8393 elf_tdata (abfd)->core_lwpid = *tid;
8396 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
8397 do not come from signals so we make sure we set the current
8398 thread just in case. */
8399 if (flags & 0x00000080)
8400 elf_tdata (abfd)->core_lwpid = *tid;
8402 /* Make a ".qnx_core_status/%d" section. */
8403 sprintf (buf, ".qnx_core_status/%ld", *tid);
8405 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
8410 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8414 sect->size = note->descsz;
8415 sect->filepos = note->descpos;
8416 sect->alignment_power = 2;
8418 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
8422 elfcore_grok_nto_regs (bfd *abfd,
8423 Elf_Internal_Note *note,
8431 /* Make a "(base)/%d" section. */
8432 sprintf (buf, "%s/%ld", base, tid);
8434 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
8439 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8443 sect->size = note->descsz;
8444 sect->filepos = note->descpos;
8445 sect->alignment_power = 2;
8447 /* This is the current thread. */
8448 if (elf_tdata (abfd)->core_lwpid == tid)
8449 return elfcore_maybe_make_sect (abfd, base, sect);
8454 #define BFD_QNT_CORE_INFO 7
8455 #define BFD_QNT_CORE_STATUS 8
8456 #define BFD_QNT_CORE_GREG 9
8457 #define BFD_QNT_CORE_FPREG 10
8460 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
8462 /* Every GREG section has a STATUS section before it. Store the
8463 tid from the previous call to pass down to the next gregs
8465 static long tid = 1;
8469 case BFD_QNT_CORE_INFO:
8470 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
8471 case BFD_QNT_CORE_STATUS:
8472 return elfcore_grok_nto_status (abfd, note, &tid);
8473 case BFD_QNT_CORE_GREG:
8474 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
8475 case BFD_QNT_CORE_FPREG:
8476 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
8483 elfcore_grok_spu_note (bfd *abfd, Elf_Internal_Note *note)
8489 /* Use note name as section name. */
8491 name = (char *) bfd_alloc (abfd, len);
8494 memcpy (name, note->namedata, len);
8495 name[len - 1] = '\0';
8497 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8501 sect->size = note->descsz;
8502 sect->filepos = note->descpos;
8503 sect->alignment_power = 1;
8508 /* Function: elfcore_write_note
8511 buffer to hold note, and current size of buffer
8515 size of data for note
8517 Writes note to end of buffer. ELF64 notes are written exactly as
8518 for ELF32, despite the current (as of 2006) ELF gabi specifying
8519 that they ought to have 8-byte namesz and descsz field, and have
8520 8-byte alignment. Other writers, eg. Linux kernel, do the same.
8523 Pointer to realloc'd buffer, *BUFSIZ updated. */
8526 elfcore_write_note (bfd *abfd,
8534 Elf_External_Note *xnp;
8541 namesz = strlen (name) + 1;
8543 newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4);
8545 buf = (char *) realloc (buf, *bufsiz + newspace);
8548 dest = buf + *bufsiz;
8549 *bufsiz += newspace;
8550 xnp = (Elf_External_Note *) dest;
8551 H_PUT_32 (abfd, namesz, xnp->namesz);
8552 H_PUT_32 (abfd, size, xnp->descsz);
8553 H_PUT_32 (abfd, type, xnp->type);
8557 memcpy (dest, name, namesz);
8565 memcpy (dest, input, size);
8575 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8577 elfcore_write_prpsinfo (bfd *abfd,
8583 const char *note_name = "CORE";
8584 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8586 if (bed->elf_backend_write_core_note != NULL)
8589 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8590 NT_PRPSINFO, fname, psargs);
8595 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
8596 if (bed->s->elfclass == ELFCLASS32)
8598 #if defined (HAVE_PSINFO32_T)
8600 int note_type = NT_PSINFO;
8603 int note_type = NT_PRPSINFO;
8606 memset (&data, 0, sizeof (data));
8607 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8608 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8609 return elfcore_write_note (abfd, buf, bufsiz,
8610 note_name, note_type, &data, sizeof (data));
8615 #if defined (HAVE_PSINFO_T)
8617 int note_type = NT_PSINFO;
8620 int note_type = NT_PRPSINFO;
8623 memset (&data, 0, sizeof (data));
8624 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8625 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8626 return elfcore_write_note (abfd, buf, bufsiz,
8627 note_name, note_type, &data, sizeof (data));
8630 #endif /* PSINFO_T or PRPSINFO_T */
8632 #if defined (HAVE_PRSTATUS_T)
8634 elfcore_write_prstatus (bfd *abfd,
8641 const char *note_name = "CORE";
8642 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8644 if (bed->elf_backend_write_core_note != NULL)
8647 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8649 pid, cursig, gregs);
8654 #if defined (HAVE_PRSTATUS32_T)
8655 if (bed->s->elfclass == ELFCLASS32)
8657 prstatus32_t prstat;
8659 memset (&prstat, 0, sizeof (prstat));
8660 prstat.pr_pid = pid;
8661 prstat.pr_cursig = cursig;
8662 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8663 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8664 NT_PRSTATUS, &prstat, sizeof (prstat));
8671 memset (&prstat, 0, sizeof (prstat));
8672 prstat.pr_pid = pid;
8673 prstat.pr_cursig = cursig;
8674 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8675 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8676 NT_PRSTATUS, &prstat, sizeof (prstat));
8679 #endif /* HAVE_PRSTATUS_T */
8681 #if defined (HAVE_LWPSTATUS_T)
8683 elfcore_write_lwpstatus (bfd *abfd,
8690 lwpstatus_t lwpstat;
8691 const char *note_name = "CORE";
8693 memset (&lwpstat, 0, sizeof (lwpstat));
8694 lwpstat.pr_lwpid = pid >> 16;
8695 lwpstat.pr_cursig = cursig;
8696 #if defined (HAVE_LWPSTATUS_T_PR_REG)
8697 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
8698 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8700 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
8701 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
8703 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
8704 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
8707 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8708 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
8710 #endif /* HAVE_LWPSTATUS_T */
8712 #if defined (HAVE_PSTATUS_T)
8714 elfcore_write_pstatus (bfd *abfd,
8718 int cursig ATTRIBUTE_UNUSED,
8719 const void *gregs ATTRIBUTE_UNUSED)
8721 const char *note_name = "CORE";
8722 #if defined (HAVE_PSTATUS32_T)
8723 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8725 if (bed->s->elfclass == ELFCLASS32)
8729 memset (&pstat, 0, sizeof (pstat));
8730 pstat.pr_pid = pid & 0xffff;
8731 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8732 NT_PSTATUS, &pstat, sizeof (pstat));
8740 memset (&pstat, 0, sizeof (pstat));
8741 pstat.pr_pid = pid & 0xffff;
8742 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8743 NT_PSTATUS, &pstat, sizeof (pstat));
8747 #endif /* HAVE_PSTATUS_T */
8750 elfcore_write_prfpreg (bfd *abfd,
8756 const char *note_name = "CORE";
8757 return elfcore_write_note (abfd, buf, bufsiz,
8758 note_name, NT_FPREGSET, fpregs, size);
8762 elfcore_write_prxfpreg (bfd *abfd,
8765 const void *xfpregs,
8768 char *note_name = "LINUX";
8769 return elfcore_write_note (abfd, buf, bufsiz,
8770 note_name, NT_PRXFPREG, xfpregs, size);
8774 elfcore_write_xstatereg (bfd *abfd, char *buf, int *bufsiz,
8775 const void *xfpregs, int size)
8777 char *note_name = "LINUX";
8778 return elfcore_write_note (abfd, buf, bufsiz,
8779 note_name, NT_X86_XSTATE, xfpregs, size);
8783 elfcore_write_ppc_vmx (bfd *abfd,
8786 const void *ppc_vmx,
8789 char *note_name = "LINUX";
8790 return elfcore_write_note (abfd, buf, bufsiz,
8791 note_name, NT_PPC_VMX, ppc_vmx, size);
8795 elfcore_write_ppc_vsx (bfd *abfd,
8798 const void *ppc_vsx,
8801 char *note_name = "LINUX";
8802 return elfcore_write_note (abfd, buf, bufsiz,
8803 note_name, NT_PPC_VSX, ppc_vsx, size);
8807 elfcore_write_s390_high_gprs (bfd *abfd,
8810 const void *s390_high_gprs,
8813 char *note_name = "LINUX";
8814 return elfcore_write_note (abfd, buf, bufsiz,
8815 note_name, NT_S390_HIGH_GPRS,
8816 s390_high_gprs, size);
8820 elfcore_write_s390_timer (bfd *abfd,
8823 const void *s390_timer,
8826 char *note_name = "LINUX";
8827 return elfcore_write_note (abfd, buf, bufsiz,
8828 note_name, NT_S390_TIMER, s390_timer, size);
8832 elfcore_write_s390_todcmp (bfd *abfd,
8835 const void *s390_todcmp,
8838 char *note_name = "LINUX";
8839 return elfcore_write_note (abfd, buf, bufsiz,
8840 note_name, NT_S390_TODCMP, s390_todcmp, size);
8844 elfcore_write_s390_todpreg (bfd *abfd,
8847 const void *s390_todpreg,
8850 char *note_name = "LINUX";
8851 return elfcore_write_note (abfd, buf, bufsiz,
8852 note_name, NT_S390_TODPREG, s390_todpreg, size);
8856 elfcore_write_s390_ctrs (bfd *abfd,
8859 const void *s390_ctrs,
8862 char *note_name = "LINUX";
8863 return elfcore_write_note (abfd, buf, bufsiz,
8864 note_name, NT_S390_CTRS, s390_ctrs, size);
8868 elfcore_write_s390_prefix (bfd *abfd,
8871 const void *s390_prefix,
8874 char *note_name = "LINUX";
8875 return elfcore_write_note (abfd, buf, bufsiz,
8876 note_name, NT_S390_PREFIX, s390_prefix, size);
8880 elfcore_write_register_note (bfd *abfd,
8883 const char *section,
8887 if (strcmp (section, ".reg2") == 0)
8888 return elfcore_write_prfpreg (abfd, buf, bufsiz, data, size);
8889 if (strcmp (section, ".reg-xfp") == 0)
8890 return elfcore_write_prxfpreg (abfd, buf, bufsiz, data, size);
8891 if (strcmp (section, ".reg-xstate") == 0)
8892 return elfcore_write_xstatereg (abfd, buf, bufsiz, data, size);
8893 if (strcmp (section, ".reg-ppc-vmx") == 0)
8894 return elfcore_write_ppc_vmx (abfd, buf, bufsiz, data, size);
8895 if (strcmp (section, ".reg-ppc-vsx") == 0)
8896 return elfcore_write_ppc_vsx (abfd, buf, bufsiz, data, size);
8897 if (strcmp (section, ".reg-s390-high-gprs") == 0)
8898 return elfcore_write_s390_high_gprs (abfd, buf, bufsiz, data, size);
8899 if (strcmp (section, ".reg-s390-timer") == 0)
8900 return elfcore_write_s390_timer (abfd, buf, bufsiz, data, size);
8901 if (strcmp (section, ".reg-s390-todcmp") == 0)
8902 return elfcore_write_s390_todcmp (abfd, buf, bufsiz, data, size);
8903 if (strcmp (section, ".reg-s390-todpreg") == 0)
8904 return elfcore_write_s390_todpreg (abfd, buf, bufsiz, data, size);
8905 if (strcmp (section, ".reg-s390-ctrs") == 0)
8906 return elfcore_write_s390_ctrs (abfd, buf, bufsiz, data, size);
8907 if (strcmp (section, ".reg-s390-prefix") == 0)
8908 return elfcore_write_s390_prefix (abfd, buf, bufsiz, data, size);
8913 elf_parse_notes (bfd *abfd, char *buf, size_t size, file_ptr offset)
8918 while (p < buf + size)
8920 /* FIXME: bad alignment assumption. */
8921 Elf_External_Note *xnp = (Elf_External_Note *) p;
8922 Elf_Internal_Note in;
8924 if (offsetof (Elf_External_Note, name) > buf - p + size)
8927 in.type = H_GET_32 (abfd, xnp->type);
8929 in.namesz = H_GET_32 (abfd, xnp->namesz);
8930 in.namedata = xnp->name;
8931 if (in.namesz > buf - in.namedata + size)
8934 in.descsz = H_GET_32 (abfd, xnp->descsz);
8935 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
8936 in.descpos = offset + (in.descdata - buf);
8938 && (in.descdata >= buf + size
8939 || in.descsz > buf - in.descdata + size))
8942 switch (bfd_get_format (abfd))
8948 if (CONST_STRNEQ (in.namedata, "NetBSD-CORE"))
8950 if (! elfcore_grok_netbsd_note (abfd, &in))
8953 else if (CONST_STRNEQ (in.namedata, "OpenBSD"))
8955 if (! elfcore_grok_openbsd_note (abfd, &in))
8958 else if (CONST_STRNEQ (in.namedata, "QNX"))
8960 if (! elfcore_grok_nto_note (abfd, &in))
8963 else if (CONST_STRNEQ (in.namedata, "SPU/"))
8965 if (! elfcore_grok_spu_note (abfd, &in))
8970 if (! elfcore_grok_note (abfd, &in))
8976 if (in.namesz == sizeof "GNU" && strcmp (in.namedata, "GNU") == 0)
8978 if (! elfobj_grok_gnu_note (abfd, &in))
8984 p = in.descdata + BFD_ALIGN (in.descsz, 4);
8991 elf_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
8998 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
9001 buf = (char *) bfd_malloc (size);
9005 if (bfd_bread (buf, size, abfd) != size
9006 || !elf_parse_notes (abfd, buf, size, offset))
9016 /* Providing external access to the ELF program header table. */
9018 /* Return an upper bound on the number of bytes required to store a
9019 copy of ABFD's program header table entries. Return -1 if an error
9020 occurs; bfd_get_error will return an appropriate code. */
9023 bfd_get_elf_phdr_upper_bound (bfd *abfd)
9025 if (abfd->xvec->flavour != bfd_target_elf_flavour)
9027 bfd_set_error (bfd_error_wrong_format);
9031 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
9034 /* Copy ABFD's program header table entries to *PHDRS. The entries
9035 will be stored as an array of Elf_Internal_Phdr structures, as
9036 defined in include/elf/internal.h. To find out how large the
9037 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
9039 Return the number of program header table entries read, or -1 if an
9040 error occurs; bfd_get_error will return an appropriate code. */
9043 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
9047 if (abfd->xvec->flavour != bfd_target_elf_flavour)
9049 bfd_set_error (bfd_error_wrong_format);
9053 num_phdrs = elf_elfheader (abfd)->e_phnum;
9054 memcpy (phdrs, elf_tdata (abfd)->phdr,
9055 num_phdrs * sizeof (Elf_Internal_Phdr));
9060 enum elf_reloc_type_class
9061 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
9063 return reloc_class_normal;
9066 /* For RELA architectures, return the relocation value for a
9067 relocation against a local symbol. */
9070 _bfd_elf_rela_local_sym (bfd *abfd,
9071 Elf_Internal_Sym *sym,
9073 Elf_Internal_Rela *rel)
9075 asection *sec = *psec;
9078 relocation = (sec->output_section->vma
9079 + sec->output_offset
9081 if ((sec->flags & SEC_MERGE)
9082 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
9083 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
9086 _bfd_merged_section_offset (abfd, psec,
9087 elf_section_data (sec)->sec_info,
9088 sym->st_value + rel->r_addend);
9091 /* If we have changed the section, and our original section is
9092 marked with SEC_EXCLUDE, it means that the original
9093 SEC_MERGE section has been completely subsumed in some
9094 other SEC_MERGE section. In this case, we need to leave
9095 some info around for --emit-relocs. */
9096 if ((sec->flags & SEC_EXCLUDE) != 0)
9097 sec->kept_section = *psec;
9100 rel->r_addend -= relocation;
9101 rel->r_addend += sec->output_section->vma + sec->output_offset;
9107 _bfd_elf_rel_local_sym (bfd *abfd,
9108 Elf_Internal_Sym *sym,
9112 asection *sec = *psec;
9114 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
9115 return sym->st_value + addend;
9117 return _bfd_merged_section_offset (abfd, psec,
9118 elf_section_data (sec)->sec_info,
9119 sym->st_value + addend);
9123 _bfd_elf_section_offset (bfd *abfd,
9124 struct bfd_link_info *info,
9128 switch (sec->sec_info_type)
9130 case ELF_INFO_TYPE_STABS:
9131 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
9133 case ELF_INFO_TYPE_EH_FRAME:
9134 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
9140 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
9141 reconstruct an ELF file by reading the segments out of remote memory
9142 based on the ELF file header at EHDR_VMA and the ELF program headers it
9143 points to. If not null, *LOADBASEP is filled in with the difference
9144 between the VMAs from which the segments were read, and the VMAs the
9145 file headers (and hence BFD's idea of each section's VMA) put them at.
9147 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
9148 remote memory at target address VMA into the local buffer at MYADDR; it
9149 should return zero on success or an `errno' code on failure. TEMPL must
9150 be a BFD for an ELF target with the word size and byte order found in
9151 the remote memory. */
9154 bfd_elf_bfd_from_remote_memory
9158 int (*target_read_memory) (bfd_vma, bfd_byte *, int))
9160 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
9161 (templ, ehdr_vma, loadbasep, target_read_memory);
9165 _bfd_elf_get_synthetic_symtab (bfd *abfd,
9166 long symcount ATTRIBUTE_UNUSED,
9167 asymbol **syms ATTRIBUTE_UNUSED,
9172 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9175 const char *relplt_name;
9176 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
9180 Elf_Internal_Shdr *hdr;
9186 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
9189 if (dynsymcount <= 0)
9192 if (!bed->plt_sym_val)
9195 relplt_name = bed->relplt_name;
9196 if (relplt_name == NULL)
9197 relplt_name = bed->rela_plts_and_copies_p ? ".rela.plt" : ".rel.plt";
9198 relplt = bfd_get_section_by_name (abfd, relplt_name);
9202 hdr = &elf_section_data (relplt)->this_hdr;
9203 if (hdr->sh_link != elf_dynsymtab (abfd)
9204 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
9207 plt = bfd_get_section_by_name (abfd, ".plt");
9211 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
9212 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
9215 count = relplt->size / hdr->sh_entsize;
9216 size = count * sizeof (asymbol);
9217 p = relplt->relocation;
9218 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
9220 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
9224 size += sizeof ("+0x") - 1 + 8 + 8 * (bed->s->elfclass == ELFCLASS64);
9226 size += sizeof ("+0x") - 1 + 8;
9231 s = *ret = (asymbol *) bfd_malloc (size);
9235 names = (char *) (s + count);
9236 p = relplt->relocation;
9238 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
9243 addr = bed->plt_sym_val (i, plt, p);
9244 if (addr == (bfd_vma) -1)
9247 *s = **p->sym_ptr_ptr;
9248 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
9249 we are defining a symbol, ensure one of them is set. */
9250 if ((s->flags & BSF_LOCAL) == 0)
9251 s->flags |= BSF_GLOBAL;
9252 s->flags |= BSF_SYNTHETIC;
9254 s->value = addr - plt->vma;
9257 len = strlen ((*p->sym_ptr_ptr)->name);
9258 memcpy (names, (*p->sym_ptr_ptr)->name, len);
9264 memcpy (names, "+0x", sizeof ("+0x") - 1);
9265 names += sizeof ("+0x") - 1;
9266 bfd_sprintf_vma (abfd, buf, p->addend);
9267 for (a = buf; *a == '0'; ++a)
9270 memcpy (names, a, len);
9273 memcpy (names, "@plt", sizeof ("@plt"));
9274 names += sizeof ("@plt");
9281 /* It is only used by x86-64 so far. */
9282 asection _bfd_elf_large_com_section
9283 = BFD_FAKE_SECTION (_bfd_elf_large_com_section,
9284 SEC_IS_COMMON, NULL, "LARGE_COMMON", 0);
9287 _bfd_elf_set_osabi (bfd * abfd,
9288 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
9290 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
9292 i_ehdrp = elf_elfheader (abfd);
9294 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
9296 /* To make things simpler for the loader on Linux systems we set the
9297 osabi field to ELFOSABI_LINUX if the binary contains symbols of
9298 the STT_GNU_IFUNC type. */
9299 if (i_ehdrp->e_ident[EI_OSABI] == ELFOSABI_NONE
9300 && elf_tdata (abfd)->has_ifunc_symbols)
9301 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_LINUX;
9305 /* Return TRUE for ELF symbol types that represent functions.
9306 This is the default version of this function, which is sufficient for
9307 most targets. It returns true if TYPE is STT_FUNC or STT_GNU_IFUNC. */
9310 _bfd_elf_is_function_type (unsigned int type)
9312 return (type == STT_FUNC
9313 || type == STT_GNU_IFUNC);