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);
1070 get_segment_type (unsigned int p_type)
1075 case PT_NULL: pt = "NULL"; break;
1076 case PT_LOAD: pt = "LOAD"; break;
1077 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1078 case PT_INTERP: pt = "INTERP"; break;
1079 case PT_NOTE: pt = "NOTE"; break;
1080 case PT_SHLIB: pt = "SHLIB"; break;
1081 case PT_PHDR: pt = "PHDR"; break;
1082 case PT_TLS: pt = "TLS"; break;
1083 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1084 case PT_GNU_STACK: pt = "STACK"; break;
1085 case PT_GNU_RELRO: pt = "RELRO"; break;
1086 default: pt = NULL; break;
1091 /* Print out the program headers. */
1094 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1096 FILE *f = (FILE *) farg;
1097 Elf_Internal_Phdr *p;
1099 bfd_byte *dynbuf = NULL;
1101 p = elf_tdata (abfd)->phdr;
1106 fprintf (f, _("\nProgram Header:\n"));
1107 c = elf_elfheader (abfd)->e_phnum;
1108 for (i = 0; i < c; i++, p++)
1110 const char *pt = get_segment_type (p->p_type);
1115 sprintf (buf, "0x%lx", p->p_type);
1118 fprintf (f, "%8s off 0x", pt);
1119 bfd_fprintf_vma (abfd, f, p->p_offset);
1120 fprintf (f, " vaddr 0x");
1121 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1122 fprintf (f, " paddr 0x");
1123 bfd_fprintf_vma (abfd, f, p->p_paddr);
1124 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1125 fprintf (f, " filesz 0x");
1126 bfd_fprintf_vma (abfd, f, p->p_filesz);
1127 fprintf (f, " memsz 0x");
1128 bfd_fprintf_vma (abfd, f, p->p_memsz);
1129 fprintf (f, " flags %c%c%c",
1130 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1131 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1132 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1133 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1134 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1139 s = bfd_get_section_by_name (abfd, ".dynamic");
1142 unsigned int elfsec;
1143 unsigned long shlink;
1144 bfd_byte *extdyn, *extdynend;
1146 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1148 fprintf (f, _("\nDynamic Section:\n"));
1150 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1153 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1154 if (elfsec == SHN_BAD)
1156 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1158 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1159 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1162 extdynend = extdyn + s->size;
1163 for (; extdyn < extdynend; extdyn += extdynsize)
1165 Elf_Internal_Dyn dyn;
1166 const char *name = "";
1168 bfd_boolean stringp;
1169 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1171 (*swap_dyn_in) (abfd, extdyn, &dyn);
1173 if (dyn.d_tag == DT_NULL)
1180 if (bed->elf_backend_get_target_dtag)
1181 name = (*bed->elf_backend_get_target_dtag) (dyn.d_tag);
1183 if (!strcmp (name, ""))
1185 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1190 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1191 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1192 case DT_PLTGOT: name = "PLTGOT"; break;
1193 case DT_HASH: name = "HASH"; break;
1194 case DT_STRTAB: name = "STRTAB"; break;
1195 case DT_SYMTAB: name = "SYMTAB"; break;
1196 case DT_RELA: name = "RELA"; break;
1197 case DT_RELASZ: name = "RELASZ"; break;
1198 case DT_RELAENT: name = "RELAENT"; break;
1199 case DT_STRSZ: name = "STRSZ"; break;
1200 case DT_SYMENT: name = "SYMENT"; break;
1201 case DT_INIT: name = "INIT"; break;
1202 case DT_FINI: name = "FINI"; break;
1203 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1204 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1205 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1206 case DT_REL: name = "REL"; break;
1207 case DT_RELSZ: name = "RELSZ"; break;
1208 case DT_RELENT: name = "RELENT"; break;
1209 case DT_PLTREL: name = "PLTREL"; break;
1210 case DT_DEBUG: name = "DEBUG"; break;
1211 case DT_TEXTREL: name = "TEXTREL"; break;
1212 case DT_JMPREL: name = "JMPREL"; break;
1213 case DT_BIND_NOW: name = "BIND_NOW"; break;
1214 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1215 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1216 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1217 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1218 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1219 case DT_FLAGS: name = "FLAGS"; break;
1220 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1221 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1222 case DT_CHECKSUM: name = "CHECKSUM"; break;
1223 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1224 case DT_MOVEENT: name = "MOVEENT"; break;
1225 case DT_MOVESZ: name = "MOVESZ"; break;
1226 case DT_FEATURE: name = "FEATURE"; break;
1227 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1228 case DT_SYMINSZ: name = "SYMINSZ"; break;
1229 case DT_SYMINENT: name = "SYMINENT"; break;
1230 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1231 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1232 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1233 case DT_PLTPAD: name = "PLTPAD"; break;
1234 case DT_MOVETAB: name = "MOVETAB"; break;
1235 case DT_SYMINFO: name = "SYMINFO"; break;
1236 case DT_RELACOUNT: name = "RELACOUNT"; break;
1237 case DT_RELCOUNT: name = "RELCOUNT"; break;
1238 case DT_FLAGS_1: name = "FLAGS_1"; break;
1239 case DT_VERSYM: name = "VERSYM"; break;
1240 case DT_VERDEF: name = "VERDEF"; break;
1241 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1242 case DT_VERNEED: name = "VERNEED"; break;
1243 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1244 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1245 case DT_USED: name = "USED"; break;
1246 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1247 case DT_GNU_HASH: name = "GNU_HASH"; break;
1250 fprintf (f, " %-20s ", name);
1254 bfd_fprintf_vma (abfd, f, dyn.d_un.d_val);
1259 unsigned int tagv = dyn.d_un.d_val;
1261 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1264 fprintf (f, "%s", string);
1273 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1274 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1276 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1280 if (elf_dynverdef (abfd) != 0)
1282 Elf_Internal_Verdef *t;
1284 fprintf (f, _("\nVersion definitions:\n"));
1285 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1287 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1288 t->vd_flags, t->vd_hash,
1289 t->vd_nodename ? t->vd_nodename : "<corrupt>");
1290 if (t->vd_auxptr != NULL && t->vd_auxptr->vda_nextptr != NULL)
1292 Elf_Internal_Verdaux *a;
1295 for (a = t->vd_auxptr->vda_nextptr;
1299 a->vda_nodename ? a->vda_nodename : "<corrupt>");
1305 if (elf_dynverref (abfd) != 0)
1307 Elf_Internal_Verneed *t;
1309 fprintf (f, _("\nVersion References:\n"));
1310 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1312 Elf_Internal_Vernaux *a;
1314 fprintf (f, _(" required from %s:\n"),
1315 t->vn_filename ? t->vn_filename : "<corrupt>");
1316 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1317 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1318 a->vna_flags, a->vna_other,
1319 a->vna_nodename ? a->vna_nodename : "<corrupt>");
1331 /* Display ELF-specific fields of a symbol. */
1334 bfd_elf_print_symbol (bfd *abfd,
1337 bfd_print_symbol_type how)
1339 FILE *file = (FILE *) filep;
1342 case bfd_print_symbol_name:
1343 fprintf (file, "%s", symbol->name);
1345 case bfd_print_symbol_more:
1346 fprintf (file, "elf ");
1347 bfd_fprintf_vma (abfd, file, symbol->value);
1348 fprintf (file, " %lx", (unsigned long) symbol->flags);
1350 case bfd_print_symbol_all:
1352 const char *section_name;
1353 const char *name = NULL;
1354 const struct elf_backend_data *bed;
1355 unsigned char st_other;
1358 section_name = symbol->section ? symbol->section->name : "(*none*)";
1360 bed = get_elf_backend_data (abfd);
1361 if (bed->elf_backend_print_symbol_all)
1362 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1366 name = symbol->name;
1367 bfd_print_symbol_vandf (abfd, file, symbol);
1370 fprintf (file, " %s\t", section_name);
1371 /* Print the "other" value for a symbol. For common symbols,
1372 we've already printed the size; now print the alignment.
1373 For other symbols, we have no specified alignment, and
1374 we've printed the address; now print the size. */
1375 if (symbol->section && bfd_is_com_section (symbol->section))
1376 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1378 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1379 bfd_fprintf_vma (abfd, file, val);
1381 /* If we have version information, print it. */
1382 if (elf_tdata (abfd)->dynversym_section != 0
1383 && (elf_tdata (abfd)->dynverdef_section != 0
1384 || elf_tdata (abfd)->dynverref_section != 0))
1386 unsigned int vernum;
1387 const char *version_string;
1389 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1392 version_string = "";
1393 else if (vernum == 1)
1394 version_string = "Base";
1395 else if (vernum <= elf_tdata (abfd)->cverdefs)
1397 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1400 Elf_Internal_Verneed *t;
1402 version_string = "";
1403 for (t = elf_tdata (abfd)->verref;
1407 Elf_Internal_Vernaux *a;
1409 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1411 if (a->vna_other == vernum)
1413 version_string = a->vna_nodename;
1420 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1421 fprintf (file, " %-11s", version_string);
1426 fprintf (file, " (%s)", version_string);
1427 for (i = 10 - strlen (version_string); i > 0; --i)
1432 /* If the st_other field is not zero, print it. */
1433 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1438 case STV_INTERNAL: fprintf (file, " .internal"); break;
1439 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1440 case STV_PROTECTED: fprintf (file, " .protected"); break;
1442 /* Some other non-defined flags are also present, so print
1444 fprintf (file, " 0x%02x", (unsigned int) st_other);
1447 fprintf (file, " %s", name);
1453 /* Allocate an ELF string table--force the first byte to be zero. */
1455 struct bfd_strtab_hash *
1456 _bfd_elf_stringtab_init (void)
1458 struct bfd_strtab_hash *ret;
1460 ret = _bfd_stringtab_init ();
1465 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1466 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1467 if (loc == (bfd_size_type) -1)
1469 _bfd_stringtab_free (ret);
1476 /* ELF .o/exec file reading */
1478 /* Create a new bfd section from an ELF section header. */
1481 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1483 Elf_Internal_Shdr *hdr;
1484 Elf_Internal_Ehdr *ehdr;
1485 const struct elf_backend_data *bed;
1488 if (shindex >= elf_numsections (abfd))
1491 hdr = elf_elfsections (abfd)[shindex];
1492 ehdr = elf_elfheader (abfd);
1493 name = bfd_elf_string_from_elf_section (abfd, ehdr->e_shstrndx,
1498 bed = get_elf_backend_data (abfd);
1499 switch (hdr->sh_type)
1502 /* Inactive section. Throw it away. */
1505 case SHT_PROGBITS: /* Normal section with contents. */
1506 case SHT_NOBITS: /* .bss section. */
1507 case SHT_HASH: /* .hash section. */
1508 case SHT_NOTE: /* .note section. */
1509 case SHT_INIT_ARRAY: /* .init_array section. */
1510 case SHT_FINI_ARRAY: /* .fini_array section. */
1511 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1512 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
1513 case SHT_GNU_HASH: /* .gnu.hash section. */
1514 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1516 case SHT_DYNAMIC: /* Dynamic linking information. */
1517 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1519 if (hdr->sh_link > elf_numsections (abfd))
1521 /* PR 10478: Accept Solaris binaries with a sh_link
1522 field set to SHN_BEFORE or SHN_AFTER. */
1523 switch (bfd_get_arch (abfd))
1526 case bfd_arch_sparc:
1527 if (hdr->sh_link == (SHN_LORESERVE & 0xffff) /* SHN_BEFORE */
1528 || hdr->sh_link == ((SHN_LORESERVE + 1) & 0xffff) /* SHN_AFTER */)
1530 /* Otherwise fall through. */
1535 else if (elf_elfsections (abfd)[hdr->sh_link] == NULL)
1537 else if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1539 Elf_Internal_Shdr *dynsymhdr;
1541 /* The shared libraries distributed with hpux11 have a bogus
1542 sh_link field for the ".dynamic" section. Find the
1543 string table for the ".dynsym" section instead. */
1544 if (elf_dynsymtab (abfd) != 0)
1546 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1547 hdr->sh_link = dynsymhdr->sh_link;
1551 unsigned int i, num_sec;
1553 num_sec = elf_numsections (abfd);
1554 for (i = 1; i < num_sec; i++)
1556 dynsymhdr = elf_elfsections (abfd)[i];
1557 if (dynsymhdr->sh_type == SHT_DYNSYM)
1559 hdr->sh_link = dynsymhdr->sh_link;
1567 case SHT_SYMTAB: /* A symbol table */
1568 if (elf_onesymtab (abfd) == shindex)
1571 if (hdr->sh_entsize != bed->s->sizeof_sym)
1573 if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size)
1575 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1576 elf_onesymtab (abfd) = shindex;
1577 elf_tdata (abfd)->symtab_hdr = *hdr;
1578 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1579 abfd->flags |= HAS_SYMS;
1581 /* Sometimes a shared object will map in the symbol table. If
1582 SHF_ALLOC is set, and this is a shared object, then we also
1583 treat this section as a BFD section. We can not base the
1584 decision purely on SHF_ALLOC, because that flag is sometimes
1585 set in a relocatable object file, which would confuse the
1587 if ((hdr->sh_flags & SHF_ALLOC) != 0
1588 && (abfd->flags & DYNAMIC) != 0
1589 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1593 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1594 can't read symbols without that section loaded as well. It
1595 is most likely specified by the next section header. */
1596 if (elf_elfsections (abfd)[elf_symtab_shndx (abfd)]->sh_link != shindex)
1598 unsigned int i, num_sec;
1600 num_sec = elf_numsections (abfd);
1601 for (i = shindex + 1; i < num_sec; i++)
1603 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1604 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1605 && hdr2->sh_link == shindex)
1609 for (i = 1; i < shindex; i++)
1611 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1612 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1613 && hdr2->sh_link == shindex)
1617 return bfd_section_from_shdr (abfd, i);
1621 case SHT_DYNSYM: /* A dynamic symbol table */
1622 if (elf_dynsymtab (abfd) == shindex)
1625 if (hdr->sh_entsize != bed->s->sizeof_sym)
1627 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1628 elf_dynsymtab (abfd) = shindex;
1629 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1630 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1631 abfd->flags |= HAS_SYMS;
1633 /* Besides being a symbol table, we also treat this as a regular
1634 section, so that objcopy can handle it. */
1635 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1637 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1638 if (elf_symtab_shndx (abfd) == shindex)
1641 BFD_ASSERT (elf_symtab_shndx (abfd) == 0);
1642 elf_symtab_shndx (abfd) = shindex;
1643 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1644 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1647 case SHT_STRTAB: /* A string table */
1648 if (hdr->bfd_section != NULL)
1650 if (ehdr->e_shstrndx == shindex)
1652 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1653 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1656 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
1659 elf_tdata (abfd)->strtab_hdr = *hdr;
1660 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
1663 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
1666 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1667 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
1668 elf_elfsections (abfd)[shindex] = hdr;
1669 /* We also treat this as a regular section, so that objcopy
1671 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1675 /* If the string table isn't one of the above, then treat it as a
1676 regular section. We need to scan all the headers to be sure,
1677 just in case this strtab section appeared before the above. */
1678 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
1680 unsigned int i, num_sec;
1682 num_sec = elf_numsections (abfd);
1683 for (i = 1; i < num_sec; i++)
1685 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1686 if (hdr2->sh_link == shindex)
1688 /* Prevent endless recursion on broken objects. */
1691 if (! bfd_section_from_shdr (abfd, i))
1693 if (elf_onesymtab (abfd) == i)
1695 if (elf_dynsymtab (abfd) == i)
1696 goto dynsymtab_strtab;
1700 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1704 /* *These* do a lot of work -- but build no sections! */
1706 asection *target_sect;
1707 Elf_Internal_Shdr *hdr2;
1708 unsigned int num_sec = elf_numsections (abfd);
1711 != (bfd_size_type) (hdr->sh_type == SHT_REL
1712 ? bed->s->sizeof_rel : bed->s->sizeof_rela))
1715 /* Check for a bogus link to avoid crashing. */
1716 if (hdr->sh_link >= num_sec)
1718 ((*_bfd_error_handler)
1719 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1720 abfd, hdr->sh_link, name, shindex));
1721 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1725 /* For some incomprehensible reason Oracle distributes
1726 libraries for Solaris in which some of the objects have
1727 bogus sh_link fields. It would be nice if we could just
1728 reject them, but, unfortunately, some people need to use
1729 them. We scan through the section headers; if we find only
1730 one suitable symbol table, we clobber the sh_link to point
1731 to it. I hope this doesn't break anything.
1733 Don't do it on executable nor shared library. */
1734 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0
1735 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1736 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1742 for (scan = 1; scan < num_sec; scan++)
1744 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1745 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1756 hdr->sh_link = found;
1759 /* Get the symbol table. */
1760 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1761 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
1762 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1765 /* If this reloc section does not use the main symbol table we
1766 don't treat it as a reloc section. BFD can't adequately
1767 represent such a section, so at least for now, we don't
1768 try. We just present it as a normal section. We also
1769 can't use it as a reloc section if it points to the null
1770 section, an invalid section, another reloc section, or its
1771 sh_link points to the null section. */
1772 if (hdr->sh_link != elf_onesymtab (abfd)
1773 || hdr->sh_link == SHN_UNDEF
1774 || hdr->sh_info == SHN_UNDEF
1775 || hdr->sh_info >= num_sec
1776 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL
1777 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_RELA)
1778 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1781 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1783 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1784 if (target_sect == NULL)
1787 if ((target_sect->flags & SEC_RELOC) == 0
1788 || target_sect->reloc_count == 0)
1789 hdr2 = &elf_section_data (target_sect)->rel_hdr;
1793 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
1794 amt = sizeof (*hdr2);
1795 hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt);
1798 elf_section_data (target_sect)->rel_hdr2 = hdr2;
1801 elf_elfsections (abfd)[shindex] = hdr2;
1802 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
1803 target_sect->flags |= SEC_RELOC;
1804 target_sect->relocation = NULL;
1805 target_sect->rel_filepos = hdr->sh_offset;
1806 /* In the section to which the relocations apply, mark whether
1807 its relocations are of the REL or RELA variety. */
1808 if (hdr->sh_size != 0)
1809 target_sect->use_rela_p = hdr->sh_type == SHT_RELA;
1810 abfd->flags |= HAS_RELOC;
1814 case SHT_GNU_verdef:
1815 elf_dynverdef (abfd) = shindex;
1816 elf_tdata (abfd)->dynverdef_hdr = *hdr;
1817 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1819 case SHT_GNU_versym:
1820 if (hdr->sh_entsize != sizeof (Elf_External_Versym))
1822 elf_dynversym (abfd) = shindex;
1823 elf_tdata (abfd)->dynversym_hdr = *hdr;
1824 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1826 case SHT_GNU_verneed:
1827 elf_dynverref (abfd) = shindex;
1828 elf_tdata (abfd)->dynverref_hdr = *hdr;
1829 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1835 if (! IS_VALID_GROUP_SECTION_HEADER (hdr))
1837 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1839 if (hdr->contents != NULL)
1841 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
1842 unsigned int n_elt = hdr->sh_size / GRP_ENTRY_SIZE;
1845 if (idx->flags & GRP_COMDAT)
1846 hdr->bfd_section->flags
1847 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
1849 /* We try to keep the same section order as it comes in. */
1851 while (--n_elt != 0)
1855 if (idx->shdr != NULL
1856 && (s = idx->shdr->bfd_section) != NULL
1857 && elf_next_in_group (s) != NULL)
1859 elf_next_in_group (hdr->bfd_section) = s;
1867 /* Possibly an attributes section. */
1868 if (hdr->sh_type == SHT_GNU_ATTRIBUTES
1869 || hdr->sh_type == bed->obj_attrs_section_type)
1871 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1873 _bfd_elf_parse_attributes (abfd, hdr);
1877 /* Check for any processor-specific section types. */
1878 if (bed->elf_backend_section_from_shdr (abfd, hdr, name, shindex))
1881 if (hdr->sh_type >= SHT_LOUSER && hdr->sh_type <= SHT_HIUSER)
1883 if ((hdr->sh_flags & SHF_ALLOC) != 0)
1884 /* FIXME: How to properly handle allocated section reserved
1885 for applications? */
1886 (*_bfd_error_handler)
1887 (_("%B: don't know how to handle allocated, application "
1888 "specific section `%s' [0x%8x]"),
1889 abfd, name, hdr->sh_type);
1891 /* Allow sections reserved for applications. */
1892 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1895 else if (hdr->sh_type >= SHT_LOPROC
1896 && hdr->sh_type <= SHT_HIPROC)
1897 /* FIXME: We should handle this section. */
1898 (*_bfd_error_handler)
1899 (_("%B: don't know how to handle processor specific section "
1901 abfd, name, hdr->sh_type);
1902 else if (hdr->sh_type >= SHT_LOOS && hdr->sh_type <= SHT_HIOS)
1904 /* Unrecognised OS-specific sections. */
1905 if ((hdr->sh_flags & SHF_OS_NONCONFORMING) != 0)
1906 /* SHF_OS_NONCONFORMING indicates that special knowledge is
1907 required to correctly process the section and the file should
1908 be rejected with an error message. */
1909 (*_bfd_error_handler)
1910 (_("%B: don't know how to handle OS specific section "
1912 abfd, name, hdr->sh_type);
1914 /* Otherwise it should be processed. */
1915 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1918 /* FIXME: We should handle this section. */
1919 (*_bfd_error_handler)
1920 (_("%B: don't know how to handle section `%s' [0x%8x]"),
1921 abfd, name, hdr->sh_type);
1929 /* Return the local symbol specified by ABFD, R_SYMNDX. */
1932 bfd_sym_from_r_symndx (struct sym_cache *cache,
1934 unsigned long r_symndx)
1936 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
1938 if (cache->abfd != abfd || cache->indx[ent] != r_symndx)
1940 Elf_Internal_Shdr *symtab_hdr;
1941 unsigned char esym[sizeof (Elf64_External_Sym)];
1942 Elf_External_Sym_Shndx eshndx;
1944 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1945 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
1946 &cache->sym[ent], esym, &eshndx) == NULL)
1949 if (cache->abfd != abfd)
1951 memset (cache->indx, -1, sizeof (cache->indx));
1954 cache->indx[ent] = r_symndx;
1957 return &cache->sym[ent];
1960 /* Given an ELF section number, retrieve the corresponding BFD
1964 bfd_section_from_elf_index (bfd *abfd, unsigned int sec_index)
1966 if (sec_index >= elf_numsections (abfd))
1968 return elf_elfsections (abfd)[sec_index]->bfd_section;
1971 static const struct bfd_elf_special_section special_sections_b[] =
1973 { STRING_COMMA_LEN (".bss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1974 { NULL, 0, 0, 0, 0 }
1977 static const struct bfd_elf_special_section special_sections_c[] =
1979 { STRING_COMMA_LEN (".comment"), 0, SHT_PROGBITS, 0 },
1980 { NULL, 0, 0, 0, 0 }
1983 static const struct bfd_elf_special_section special_sections_d[] =
1985 { STRING_COMMA_LEN (".data"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1986 { STRING_COMMA_LEN (".data1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1987 { STRING_COMMA_LEN (".debug"), 0, SHT_PROGBITS, 0 },
1988 { STRING_COMMA_LEN (".debug_line"), 0, SHT_PROGBITS, 0 },
1989 { STRING_COMMA_LEN (".debug_info"), 0, SHT_PROGBITS, 0 },
1990 { STRING_COMMA_LEN (".debug_abbrev"), 0, SHT_PROGBITS, 0 },
1991 { STRING_COMMA_LEN (".debug_aranges"), 0, SHT_PROGBITS, 0 },
1992 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, SHF_ALLOC },
1993 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, SHF_ALLOC },
1994 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, SHF_ALLOC },
1995 { NULL, 0, 0, 0, 0 }
1998 static const struct bfd_elf_special_section special_sections_f[] =
2000 { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2001 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2002 { NULL, 0, 0, 0, 0 }
2005 static const struct bfd_elf_special_section special_sections_g[] =
2007 { STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2008 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2009 { STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym, 0 },
2010 { STRING_COMMA_LEN (".gnu.version_d"), 0, SHT_GNU_verdef, 0 },
2011 { STRING_COMMA_LEN (".gnu.version_r"), 0, SHT_GNU_verneed, 0 },
2012 { STRING_COMMA_LEN (".gnu.liblist"), 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2013 { STRING_COMMA_LEN (".gnu.conflict"), 0, SHT_RELA, SHF_ALLOC },
2014 { STRING_COMMA_LEN (".gnu.hash"), 0, SHT_GNU_HASH, SHF_ALLOC },
2015 { NULL, 0, 0, 0, 0 }
2018 static const struct bfd_elf_special_section special_sections_h[] =
2020 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, SHF_ALLOC },
2021 { NULL, 0, 0, 0, 0 }
2024 static const struct bfd_elf_special_section special_sections_i[] =
2026 { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2027 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2028 { STRING_COMMA_LEN (".interp"), 0, SHT_PROGBITS, 0 },
2029 { NULL, 0, 0, 0, 0 }
2032 static const struct bfd_elf_special_section special_sections_l[] =
2034 { STRING_COMMA_LEN (".line"), 0, SHT_PROGBITS, 0 },
2035 { NULL, 0, 0, 0, 0 }
2038 static const struct bfd_elf_special_section special_sections_n[] =
2040 { STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS, 0 },
2041 { STRING_COMMA_LEN (".note"), -1, SHT_NOTE, 0 },
2042 { NULL, 0, 0, 0, 0 }
2045 static const struct bfd_elf_special_section special_sections_p[] =
2047 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2048 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2049 { NULL, 0, 0, 0, 0 }
2052 static const struct bfd_elf_special_section special_sections_r[] =
2054 { STRING_COMMA_LEN (".rodata"), -2, SHT_PROGBITS, SHF_ALLOC },
2055 { STRING_COMMA_LEN (".rodata1"), 0, SHT_PROGBITS, SHF_ALLOC },
2056 { STRING_COMMA_LEN (".rela"), -1, SHT_RELA, 0 },
2057 { STRING_COMMA_LEN (".rel"), -1, SHT_REL, 0 },
2058 { NULL, 0, 0, 0, 0 }
2061 static const struct bfd_elf_special_section special_sections_s[] =
2063 { STRING_COMMA_LEN (".shstrtab"), 0, SHT_STRTAB, 0 },
2064 { STRING_COMMA_LEN (".strtab"), 0, SHT_STRTAB, 0 },
2065 { STRING_COMMA_LEN (".symtab"), 0, SHT_SYMTAB, 0 },
2066 /* See struct bfd_elf_special_section declaration for the semantics of
2067 this special case where .prefix_length != strlen (.prefix). */
2068 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2069 { NULL, 0, 0, 0, 0 }
2072 static const struct bfd_elf_special_section special_sections_t[] =
2074 { STRING_COMMA_LEN (".text"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2075 { STRING_COMMA_LEN (".tbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2076 { STRING_COMMA_LEN (".tdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2077 { NULL, 0, 0, 0, 0 }
2080 static const struct bfd_elf_special_section special_sections_z[] =
2082 { STRING_COMMA_LEN (".zdebug_line"), 0, SHT_PROGBITS, 0 },
2083 { STRING_COMMA_LEN (".zdebug_info"), 0, SHT_PROGBITS, 0 },
2084 { STRING_COMMA_LEN (".zdebug_abbrev"), 0, SHT_PROGBITS, 0 },
2085 { STRING_COMMA_LEN (".zdebug_aranges"), 0, SHT_PROGBITS, 0 },
2086 { NULL, 0, 0, 0, 0 }
2089 static const struct bfd_elf_special_section *special_sections[] =
2091 special_sections_b, /* 'b' */
2092 special_sections_c, /* 'c' */
2093 special_sections_d, /* 'd' */
2095 special_sections_f, /* 'f' */
2096 special_sections_g, /* 'g' */
2097 special_sections_h, /* 'h' */
2098 special_sections_i, /* 'i' */
2101 special_sections_l, /* 'l' */
2103 special_sections_n, /* 'n' */
2105 special_sections_p, /* 'p' */
2107 special_sections_r, /* 'r' */
2108 special_sections_s, /* 's' */
2109 special_sections_t, /* 't' */
2115 special_sections_z /* 'z' */
2118 const struct bfd_elf_special_section *
2119 _bfd_elf_get_special_section (const char *name,
2120 const struct bfd_elf_special_section *spec,
2126 len = strlen (name);
2128 for (i = 0; spec[i].prefix != NULL; i++)
2131 int prefix_len = spec[i].prefix_length;
2133 if (len < prefix_len)
2135 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2138 suffix_len = spec[i].suffix_length;
2139 if (suffix_len <= 0)
2141 if (name[prefix_len] != 0)
2143 if (suffix_len == 0)
2145 if (name[prefix_len] != '.'
2146 && (suffix_len == -2
2147 || (rela && spec[i].type == SHT_REL)))
2153 if (len < prefix_len + suffix_len)
2155 if (memcmp (name + len - suffix_len,
2156 spec[i].prefix + prefix_len,
2166 const struct bfd_elf_special_section *
2167 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2170 const struct bfd_elf_special_section *spec;
2171 const struct elf_backend_data *bed;
2173 /* See if this is one of the special sections. */
2174 if (sec->name == NULL)
2177 bed = get_elf_backend_data (abfd);
2178 spec = bed->special_sections;
2181 spec = _bfd_elf_get_special_section (sec->name,
2182 bed->special_sections,
2188 if (sec->name[0] != '.')
2191 i = sec->name[1] - 'b';
2192 if (i < 0 || i > 'z' - 'b')
2195 spec = special_sections[i];
2200 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2204 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2206 struct bfd_elf_section_data *sdata;
2207 const struct elf_backend_data *bed;
2208 const struct bfd_elf_special_section *ssect;
2210 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2213 sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd,
2217 sec->used_by_bfd = sdata;
2220 /* Indicate whether or not this section should use RELA relocations. */
2221 bed = get_elf_backend_data (abfd);
2222 sec->use_rela_p = bed->default_use_rela_p;
2224 /* When we read a file, we don't need to set ELF section type and
2225 flags. They will be overridden in _bfd_elf_make_section_from_shdr
2226 anyway. We will set ELF section type and flags for all linker
2227 created sections. If user specifies BFD section flags, we will
2228 set ELF section type and flags based on BFD section flags in
2229 elf_fake_sections. */
2230 if ((!sec->flags && abfd->direction != read_direction)
2231 || (sec->flags & SEC_LINKER_CREATED) != 0)
2233 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2236 elf_section_type (sec) = ssect->type;
2237 elf_section_flags (sec) = ssect->attr;
2241 return _bfd_generic_new_section_hook (abfd, sec);
2244 /* Create a new bfd section from an ELF program header.
2246 Since program segments have no names, we generate a synthetic name
2247 of the form segment<NUM>, where NUM is generally the index in the
2248 program header table. For segments that are split (see below) we
2249 generate the names segment<NUM>a and segment<NUM>b.
2251 Note that some program segments may have a file size that is different than
2252 (less than) the memory size. All this means is that at execution the
2253 system must allocate the amount of memory specified by the memory size,
2254 but only initialize it with the first "file size" bytes read from the
2255 file. This would occur for example, with program segments consisting
2256 of combined data+bss.
2258 To handle the above situation, this routine generates TWO bfd sections
2259 for the single program segment. The first has the length specified by
2260 the file size of the segment, and the second has the length specified
2261 by the difference between the two sizes. In effect, the segment is split
2262 into its initialized and uninitialized parts.
2267 _bfd_elf_make_section_from_phdr (bfd *abfd,
2268 Elf_Internal_Phdr *hdr,
2270 const char *type_name)
2278 split = ((hdr->p_memsz > 0)
2279 && (hdr->p_filesz > 0)
2280 && (hdr->p_memsz > hdr->p_filesz));
2282 if (hdr->p_filesz > 0)
2284 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "a" : "");
2285 len = strlen (namebuf) + 1;
2286 name = (char *) bfd_alloc (abfd, len);
2289 memcpy (name, namebuf, len);
2290 newsect = bfd_make_section (abfd, name);
2291 if (newsect == NULL)
2293 newsect->vma = hdr->p_vaddr;
2294 newsect->lma = hdr->p_paddr;
2295 newsect->size = hdr->p_filesz;
2296 newsect->filepos = hdr->p_offset;
2297 newsect->flags |= SEC_HAS_CONTENTS;
2298 newsect->alignment_power = bfd_log2 (hdr->p_align);
2299 if (hdr->p_type == PT_LOAD)
2301 newsect->flags |= SEC_ALLOC;
2302 newsect->flags |= SEC_LOAD;
2303 if (hdr->p_flags & PF_X)
2305 /* FIXME: all we known is that it has execute PERMISSION,
2307 newsect->flags |= SEC_CODE;
2310 if (!(hdr->p_flags & PF_W))
2312 newsect->flags |= SEC_READONLY;
2316 if (hdr->p_memsz > hdr->p_filesz)
2320 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "b" : "");
2321 len = strlen (namebuf) + 1;
2322 name = (char *) bfd_alloc (abfd, len);
2325 memcpy (name, namebuf, len);
2326 newsect = bfd_make_section (abfd, name);
2327 if (newsect == NULL)
2329 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2330 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2331 newsect->size = hdr->p_memsz - hdr->p_filesz;
2332 newsect->filepos = hdr->p_offset + hdr->p_filesz;
2333 align = newsect->vma & -newsect->vma;
2334 if (align == 0 || align > hdr->p_align)
2335 align = hdr->p_align;
2336 newsect->alignment_power = bfd_log2 (align);
2337 if (hdr->p_type == PT_LOAD)
2339 /* Hack for gdb. Segments that have not been modified do
2340 not have their contents written to a core file, on the
2341 assumption that a debugger can find the contents in the
2342 executable. We flag this case by setting the fake
2343 section size to zero. Note that "real" bss sections will
2344 always have their contents dumped to the core file. */
2345 if (bfd_get_format (abfd) == bfd_core)
2347 newsect->flags |= SEC_ALLOC;
2348 if (hdr->p_flags & PF_X)
2349 newsect->flags |= SEC_CODE;
2351 if (!(hdr->p_flags & PF_W))
2352 newsect->flags |= SEC_READONLY;
2359 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int hdr_index)
2361 const struct elf_backend_data *bed;
2363 switch (hdr->p_type)
2366 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "null");
2369 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "load");
2372 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "dynamic");
2375 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "interp");
2378 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "note"))
2380 if (! elf_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2385 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "shlib");
2388 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "phdr");
2390 case PT_GNU_EH_FRAME:
2391 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index,
2395 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "stack");
2398 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "relro");
2401 /* Check for any processor-specific program segment types. */
2402 bed = get_elf_backend_data (abfd);
2403 return bed->elf_backend_section_from_phdr (abfd, hdr, hdr_index, "proc");
2407 /* Initialize REL_HDR, the section-header for new section, containing
2408 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2409 relocations; otherwise, we use REL relocations. */
2412 _bfd_elf_init_reloc_shdr (bfd *abfd,
2413 Elf_Internal_Shdr *rel_hdr,
2415 bfd_boolean use_rela_p)
2418 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2419 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2421 name = (char *) bfd_alloc (abfd, amt);
2424 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2426 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2428 if (rel_hdr->sh_name == (unsigned int) -1)
2430 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2431 rel_hdr->sh_entsize = (use_rela_p
2432 ? bed->s->sizeof_rela
2433 : bed->s->sizeof_rel);
2434 rel_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
2435 rel_hdr->sh_flags = 0;
2436 rel_hdr->sh_addr = 0;
2437 rel_hdr->sh_size = 0;
2438 rel_hdr->sh_offset = 0;
2443 /* Return the default section type based on the passed in section flags. */
2446 bfd_elf_get_default_section_type (flagword flags)
2448 if ((flags & SEC_ALLOC) != 0
2449 && ((flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0
2450 || (flags & SEC_NEVER_LOAD) != 0))
2452 return SHT_PROGBITS;
2455 /* Set up an ELF internal section header for a section. */
2458 elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg)
2460 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2461 bfd_boolean *failedptr = (bfd_boolean *) failedptrarg;
2462 Elf_Internal_Shdr *this_hdr;
2463 unsigned int sh_type;
2467 /* We already failed; just get out of the bfd_map_over_sections
2472 this_hdr = &elf_section_data (asect)->this_hdr;
2474 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2475 asect->name, FALSE);
2476 if (this_hdr->sh_name == (unsigned int) -1)
2482 /* Don't clear sh_flags. Assembler may set additional bits. */
2484 if ((asect->flags & SEC_ALLOC) != 0
2485 || asect->user_set_vma)
2486 this_hdr->sh_addr = asect->vma;
2488 this_hdr->sh_addr = 0;
2490 this_hdr->sh_offset = 0;
2491 this_hdr->sh_size = asect->size;
2492 this_hdr->sh_link = 0;
2493 this_hdr->sh_addralign = (bfd_vma) 1 << asect->alignment_power;
2494 /* The sh_entsize and sh_info fields may have been set already by
2495 copy_private_section_data. */
2497 this_hdr->bfd_section = asect;
2498 this_hdr->contents = NULL;
2500 /* If the section type is unspecified, we set it based on
2502 if ((asect->flags & SEC_GROUP) != 0)
2503 sh_type = SHT_GROUP;
2505 sh_type = bfd_elf_get_default_section_type (asect->flags);
2507 if (this_hdr->sh_type == SHT_NULL)
2508 this_hdr->sh_type = sh_type;
2509 else if (this_hdr->sh_type == SHT_NOBITS
2510 && sh_type == SHT_PROGBITS
2511 && (asect->flags & SEC_ALLOC) != 0)
2513 /* Warn if we are changing a NOBITS section to PROGBITS, but
2514 allow the link to proceed. This can happen when users link
2515 non-bss input sections to bss output sections, or emit data
2516 to a bss output section via a linker script. */
2517 (*_bfd_error_handler)
2518 (_("warning: section `%A' type changed to PROGBITS"), asect);
2519 this_hdr->sh_type = sh_type;
2522 switch (this_hdr->sh_type)
2528 case SHT_INIT_ARRAY:
2529 case SHT_FINI_ARRAY:
2530 case SHT_PREINIT_ARRAY:
2537 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2541 this_hdr->sh_entsize = bed->s->sizeof_sym;
2545 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2549 if (get_elf_backend_data (abfd)->may_use_rela_p)
2550 this_hdr->sh_entsize = bed->s->sizeof_rela;
2554 if (get_elf_backend_data (abfd)->may_use_rel_p)
2555 this_hdr->sh_entsize = bed->s->sizeof_rel;
2558 case SHT_GNU_versym:
2559 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2562 case SHT_GNU_verdef:
2563 this_hdr->sh_entsize = 0;
2564 /* objcopy or strip will copy over sh_info, but may not set
2565 cverdefs. The linker will set cverdefs, but sh_info will be
2567 if (this_hdr->sh_info == 0)
2568 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2570 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2571 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2574 case SHT_GNU_verneed:
2575 this_hdr->sh_entsize = 0;
2576 /* objcopy or strip will copy over sh_info, but may not set
2577 cverrefs. The linker will set cverrefs, but sh_info will be
2579 if (this_hdr->sh_info == 0)
2580 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2582 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2583 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2587 this_hdr->sh_entsize = GRP_ENTRY_SIZE;
2591 this_hdr->sh_entsize = bed->s->arch_size == 64 ? 0 : 4;
2595 if ((asect->flags & SEC_ALLOC) != 0)
2596 this_hdr->sh_flags |= SHF_ALLOC;
2597 if ((asect->flags & SEC_READONLY) == 0)
2598 this_hdr->sh_flags |= SHF_WRITE;
2599 if ((asect->flags & SEC_CODE) != 0)
2600 this_hdr->sh_flags |= SHF_EXECINSTR;
2601 if ((asect->flags & SEC_MERGE) != 0)
2603 this_hdr->sh_flags |= SHF_MERGE;
2604 this_hdr->sh_entsize = asect->entsize;
2605 if ((asect->flags & SEC_STRINGS) != 0)
2606 this_hdr->sh_flags |= SHF_STRINGS;
2608 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2609 this_hdr->sh_flags |= SHF_GROUP;
2610 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2612 this_hdr->sh_flags |= SHF_TLS;
2613 if (asect->size == 0
2614 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2616 struct bfd_link_order *o = asect->map_tail.link_order;
2618 this_hdr->sh_size = 0;
2621 this_hdr->sh_size = o->offset + o->size;
2622 if (this_hdr->sh_size != 0)
2623 this_hdr->sh_type = SHT_NOBITS;
2628 /* Check for processor-specific section types. */
2629 sh_type = this_hdr->sh_type;
2630 if (bed->elf_backend_fake_sections
2631 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2634 if (sh_type == SHT_NOBITS && asect->size != 0)
2636 /* Don't change the header type from NOBITS if we are being
2637 called for objcopy --only-keep-debug. */
2638 this_hdr->sh_type = sh_type;
2641 /* If the section has relocs, set up a section header for the
2642 SHT_REL[A] section. If two relocation sections are required for
2643 this section, it is up to the processor-specific back-end to
2644 create the other. */
2645 if ((asect->flags & SEC_RELOC) != 0
2646 && !_bfd_elf_init_reloc_shdr (abfd,
2647 &elf_section_data (asect)->rel_hdr,
2653 /* Fill in the contents of a SHT_GROUP section. Called from
2654 _bfd_elf_compute_section_file_positions for gas, objcopy, and
2655 when ELF targets use the generic linker, ld. Called for ld -r
2656 from bfd_elf_final_link. */
2659 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2661 bfd_boolean *failedptr = (bfd_boolean *) failedptrarg;
2662 asection *elt, *first;
2666 /* Ignore linker created group section. See elfNN_ia64_object_p in
2668 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2672 if (elf_section_data (sec)->this_hdr.sh_info == 0)
2674 unsigned long symindx = 0;
2676 /* elf_group_id will have been set up by objcopy and the
2678 if (elf_group_id (sec) != NULL)
2679 symindx = elf_group_id (sec)->udata.i;
2683 /* If called from the assembler, swap_out_syms will have set up
2684 elf_section_syms. */
2685 BFD_ASSERT (elf_section_syms (abfd) != NULL);
2686 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2688 elf_section_data (sec)->this_hdr.sh_info = symindx;
2690 else if (elf_section_data (sec)->this_hdr.sh_info == (unsigned int) -2)
2692 /* The ELF backend linker sets sh_info to -2 when the group
2693 signature symbol is global, and thus the index can't be
2694 set until all local symbols are output. */
2695 asection *igroup = elf_sec_group (elf_next_in_group (sec));
2696 struct bfd_elf_section_data *sec_data = elf_section_data (igroup);
2697 unsigned long symndx = sec_data->this_hdr.sh_info;
2698 unsigned long extsymoff = 0;
2699 struct elf_link_hash_entry *h;
2701 if (!elf_bad_symtab (igroup->owner))
2703 Elf_Internal_Shdr *symtab_hdr;
2705 symtab_hdr = &elf_tdata (igroup->owner)->symtab_hdr;
2706 extsymoff = symtab_hdr->sh_info;
2708 h = elf_sym_hashes (igroup->owner)[symndx - extsymoff];
2709 while (h->root.type == bfd_link_hash_indirect
2710 || h->root.type == bfd_link_hash_warning)
2711 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2713 elf_section_data (sec)->this_hdr.sh_info = h->indx;
2716 /* The contents won't be allocated for "ld -r" or objcopy. */
2718 if (sec->contents == NULL)
2721 sec->contents = (unsigned char *) bfd_alloc (abfd, sec->size);
2723 /* Arrange for the section to be written out. */
2724 elf_section_data (sec)->this_hdr.contents = sec->contents;
2725 if (sec->contents == NULL)
2732 loc = sec->contents + sec->size;
2734 /* Get the pointer to the first section in the group that gas
2735 squirreled away here. objcopy arranges for this to be set to the
2736 start of the input section group. */
2737 first = elt = elf_next_in_group (sec);
2739 /* First element is a flag word. Rest of section is elf section
2740 indices for all the sections of the group. Write them backwards
2741 just to keep the group in the same order as given in .section
2742 directives, not that it matters. */
2749 s = s->output_section;
2751 && !bfd_is_abs_section (s))
2753 unsigned int idx = elf_section_data (s)->this_idx;
2756 H_PUT_32 (abfd, idx, loc);
2758 elt = elf_next_in_group (elt);
2763 if ((loc -= 4) != sec->contents)
2766 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2769 /* Assign all ELF section numbers. The dummy first section is handled here
2770 too. The link/info pointers for the standard section types are filled
2771 in here too, while we're at it. */
2774 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
2776 struct elf_obj_tdata *t = elf_tdata (abfd);
2778 unsigned int section_number, secn;
2779 Elf_Internal_Shdr **i_shdrp;
2780 struct bfd_elf_section_data *d;
2781 bfd_boolean need_symtab;
2785 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2787 /* SHT_GROUP sections are in relocatable files only. */
2788 if (link_info == NULL || link_info->relocatable)
2790 /* Put SHT_GROUP sections first. */
2791 for (sec = abfd->sections; sec != NULL; sec = sec->next)
2793 d = elf_section_data (sec);
2795 if (d->this_hdr.sh_type == SHT_GROUP)
2797 if (sec->flags & SEC_LINKER_CREATED)
2799 /* Remove the linker created SHT_GROUP sections. */
2800 bfd_section_list_remove (abfd, sec);
2801 abfd->section_count--;
2804 d->this_idx = section_number++;
2809 for (sec = abfd->sections; sec; sec = sec->next)
2811 d = elf_section_data (sec);
2813 if (d->this_hdr.sh_type != SHT_GROUP)
2814 d->this_idx = section_number++;
2815 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2816 if ((sec->flags & SEC_RELOC) == 0)
2820 d->rel_idx = section_number++;
2821 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2826 d->rel_idx2 = section_number++;
2827 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2833 t->shstrtab_section = section_number++;
2834 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2835 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2837 need_symtab = (bfd_get_symcount (abfd) > 0
2838 || (link_info == NULL
2839 && ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
2843 t->symtab_section = section_number++;
2844 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2845 if (section_number > ((SHN_LORESERVE - 2) & 0xFFFF))
2847 t->symtab_shndx_section = section_number++;
2848 t->symtab_shndx_hdr.sh_name
2849 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2850 ".symtab_shndx", FALSE);
2851 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2854 t->strtab_section = section_number++;
2855 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2858 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2859 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2861 elf_numsections (abfd) = section_number;
2862 elf_elfheader (abfd)->e_shnum = section_number;
2864 /* Set up the list of section header pointers, in agreement with the
2866 i_shdrp = (Elf_Internal_Shdr **) bfd_zalloc2 (abfd, section_number,
2867 sizeof (Elf_Internal_Shdr *));
2868 if (i_shdrp == NULL)
2871 i_shdrp[0] = (Elf_Internal_Shdr *) bfd_zalloc (abfd,
2872 sizeof (Elf_Internal_Shdr));
2873 if (i_shdrp[0] == NULL)
2875 bfd_release (abfd, i_shdrp);
2879 elf_elfsections (abfd) = i_shdrp;
2881 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
2884 i_shdrp[t->symtab_section] = &t->symtab_hdr;
2885 if (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF))
2887 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
2888 t->symtab_shndx_hdr.sh_link = t->symtab_section;
2890 i_shdrp[t->strtab_section] = &t->strtab_hdr;
2891 t->symtab_hdr.sh_link = t->strtab_section;
2894 for (sec = abfd->sections; sec; sec = sec->next)
2899 d = elf_section_data (sec);
2901 i_shdrp[d->this_idx] = &d->this_hdr;
2902 if (d->rel_idx != 0)
2903 i_shdrp[d->rel_idx] = &d->rel_hdr;
2904 if (d->rel_idx2 != 0)
2905 i_shdrp[d->rel_idx2] = d->rel_hdr2;
2907 /* Fill in the sh_link and sh_info fields while we're at it. */
2909 /* sh_link of a reloc section is the section index of the symbol
2910 table. sh_info is the section index of the section to which
2911 the relocation entries apply. */
2912 if (d->rel_idx != 0)
2914 d->rel_hdr.sh_link = t->symtab_section;
2915 d->rel_hdr.sh_info = d->this_idx;
2917 if (d->rel_idx2 != 0)
2919 d->rel_hdr2->sh_link = t->symtab_section;
2920 d->rel_hdr2->sh_info = d->this_idx;
2923 /* We need to set up sh_link for SHF_LINK_ORDER. */
2924 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
2926 s = elf_linked_to_section (sec);
2929 /* elf_linked_to_section points to the input section. */
2930 if (link_info != NULL)
2932 /* Check discarded linkonce section. */
2933 if (elf_discarded_section (s))
2936 (*_bfd_error_handler)
2937 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
2938 abfd, d->this_hdr.bfd_section,
2940 /* Point to the kept section if it has the same
2941 size as the discarded one. */
2942 kept = _bfd_elf_check_kept_section (s, link_info);
2945 bfd_set_error (bfd_error_bad_value);
2951 s = s->output_section;
2952 BFD_ASSERT (s != NULL);
2956 /* Handle objcopy. */
2957 if (s->output_section == NULL)
2959 (*_bfd_error_handler)
2960 (_("%B: sh_link of section `%A' points to removed section `%A' of `%B'"),
2961 abfd, d->this_hdr.bfd_section, s, s->owner);
2962 bfd_set_error (bfd_error_bad_value);
2965 s = s->output_section;
2967 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2972 The Intel C compiler generates SHT_IA_64_UNWIND with
2973 SHF_LINK_ORDER. But it doesn't set the sh_link or
2974 sh_info fields. Hence we could get the situation
2976 const struct elf_backend_data *bed
2977 = get_elf_backend_data (abfd);
2978 if (bed->link_order_error_handler)
2979 bed->link_order_error_handler
2980 (_("%B: warning: sh_link not set for section `%A'"),
2985 switch (d->this_hdr.sh_type)
2989 /* A reloc section which we are treating as a normal BFD
2990 section. sh_link is the section index of the symbol
2991 table. sh_info is the section index of the section to
2992 which the relocation entries apply. We assume that an
2993 allocated reloc section uses the dynamic symbol table.
2994 FIXME: How can we be sure? */
2995 s = bfd_get_section_by_name (abfd, ".dynsym");
2997 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2999 /* We look up the section the relocs apply to by name. */
3001 if (d->this_hdr.sh_type == SHT_REL)
3005 s = bfd_get_section_by_name (abfd, name);
3007 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3011 /* We assume that a section named .stab*str is a stabs
3012 string section. We look for a section with the same name
3013 but without the trailing ``str'', and set its sh_link
3014 field to point to this section. */
3015 if (CONST_STRNEQ (sec->name, ".stab")
3016 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3021 len = strlen (sec->name);
3022 alc = (char *) bfd_malloc (len - 2);
3025 memcpy (alc, sec->name, len - 3);
3026 alc[len - 3] = '\0';
3027 s = bfd_get_section_by_name (abfd, alc);
3031 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3033 /* This is a .stab section. */
3034 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3035 elf_section_data (s)->this_hdr.sh_entsize
3036 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3043 case SHT_GNU_verneed:
3044 case SHT_GNU_verdef:
3045 /* sh_link is the section header index of the string table
3046 used for the dynamic entries, or the symbol table, or the
3048 s = bfd_get_section_by_name (abfd, ".dynstr");
3050 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3053 case SHT_GNU_LIBLIST:
3054 /* sh_link is the section header index of the prelink library
3055 list used for the dynamic entries, or the symbol table, or
3056 the version strings. */
3057 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3058 ? ".dynstr" : ".gnu.libstr");
3060 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3065 case SHT_GNU_versym:
3066 /* sh_link is the section header index of the symbol table
3067 this hash table or version table is for. */
3068 s = bfd_get_section_by_name (abfd, ".dynsym");
3070 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3074 d->this_hdr.sh_link = t->symtab_section;
3078 for (secn = 1; secn < section_number; ++secn)
3079 if (i_shdrp[secn] == NULL)
3080 i_shdrp[secn] = i_shdrp[0];
3082 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3083 i_shdrp[secn]->sh_name);
3087 /* Map symbol from it's internal number to the external number, moving
3088 all local symbols to be at the head of the list. */
3091 sym_is_global (bfd *abfd, asymbol *sym)
3093 /* If the backend has a special mapping, use it. */
3094 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3095 if (bed->elf_backend_sym_is_global)
3096 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3098 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK | BSF_GNU_UNIQUE)) != 0
3099 || bfd_is_und_section (bfd_get_section (sym))
3100 || bfd_is_com_section (bfd_get_section (sym)));
3103 /* Don't output section symbols for sections that are not going to be
3107 ignore_section_sym (bfd *abfd, asymbol *sym)
3109 return ((sym->flags & BSF_SECTION_SYM) != 0
3110 && !(sym->section->owner == abfd
3111 || (sym->section->output_section->owner == abfd
3112 && sym->section->output_offset == 0)));
3116 elf_map_symbols (bfd *abfd)
3118 unsigned int symcount = bfd_get_symcount (abfd);
3119 asymbol **syms = bfd_get_outsymbols (abfd);
3120 asymbol **sect_syms;
3121 unsigned int num_locals = 0;
3122 unsigned int num_globals = 0;
3123 unsigned int num_locals2 = 0;
3124 unsigned int num_globals2 = 0;
3131 fprintf (stderr, "elf_map_symbols\n");
3135 for (asect = abfd->sections; asect; asect = asect->next)
3137 if (max_index < asect->index)
3138 max_index = asect->index;
3142 sect_syms = (asymbol **) bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
3143 if (sect_syms == NULL)
3145 elf_section_syms (abfd) = sect_syms;
3146 elf_num_section_syms (abfd) = max_index;
3148 /* Init sect_syms entries for any section symbols we have already
3149 decided to output. */
3150 for (idx = 0; idx < symcount; idx++)
3152 asymbol *sym = syms[idx];
3154 if ((sym->flags & BSF_SECTION_SYM) != 0
3156 && !ignore_section_sym (abfd, sym))
3158 asection *sec = sym->section;
3160 if (sec->owner != abfd)
3161 sec = sec->output_section;
3163 sect_syms[sec->index] = syms[idx];
3167 /* Classify all of the symbols. */
3168 for (idx = 0; idx < symcount; idx++)
3170 if (ignore_section_sym (abfd, syms[idx]))
3172 if (!sym_is_global (abfd, syms[idx]))
3178 /* We will be adding a section symbol for each normal BFD section. Most
3179 sections will already have a section symbol in outsymbols, but
3180 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3181 at least in that case. */
3182 for (asect = abfd->sections; asect; asect = asect->next)
3184 if (sect_syms[asect->index] == NULL)
3186 if (!sym_is_global (abfd, asect->symbol))
3193 /* Now sort the symbols so the local symbols are first. */
3194 new_syms = (asymbol **) bfd_alloc2 (abfd, num_locals + num_globals,
3195 sizeof (asymbol *));
3197 if (new_syms == NULL)
3200 for (idx = 0; idx < symcount; idx++)
3202 asymbol *sym = syms[idx];
3205 if (ignore_section_sym (abfd, sym))
3207 if (!sym_is_global (abfd, sym))
3210 i = num_locals + num_globals2++;
3212 sym->udata.i = i + 1;
3214 for (asect = abfd->sections; asect; asect = asect->next)
3216 if (sect_syms[asect->index] == NULL)
3218 asymbol *sym = asect->symbol;
3221 sect_syms[asect->index] = sym;
3222 if (!sym_is_global (abfd, sym))
3225 i = num_locals + num_globals2++;
3227 sym->udata.i = i + 1;
3231 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3233 elf_num_locals (abfd) = num_locals;
3234 elf_num_globals (abfd) = num_globals;
3238 /* Align to the maximum file alignment that could be required for any
3239 ELF data structure. */
3241 static inline file_ptr
3242 align_file_position (file_ptr off, int align)
3244 return (off + align - 1) & ~(align - 1);
3247 /* Assign a file position to a section, optionally aligning to the
3248 required section alignment. */
3251 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3255 if (align && i_shdrp->sh_addralign > 1)
3256 offset = BFD_ALIGN (offset, i_shdrp->sh_addralign);
3257 i_shdrp->sh_offset = offset;
3258 if (i_shdrp->bfd_section != NULL)
3259 i_shdrp->bfd_section->filepos = offset;
3260 if (i_shdrp->sh_type != SHT_NOBITS)
3261 offset += i_shdrp->sh_size;
3265 /* Compute the file positions we are going to put the sections at, and
3266 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3267 is not NULL, this is being called by the ELF backend linker. */
3270 _bfd_elf_compute_section_file_positions (bfd *abfd,
3271 struct bfd_link_info *link_info)
3273 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3275 struct bfd_strtab_hash *strtab = NULL;
3276 Elf_Internal_Shdr *shstrtab_hdr;
3277 bfd_boolean need_symtab;
3279 if (abfd->output_has_begun)
3282 /* Do any elf backend specific processing first. */
3283 if (bed->elf_backend_begin_write_processing)
3284 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3286 if (! prep_headers (abfd))
3289 /* Post process the headers if necessary. */
3290 if (bed->elf_backend_post_process_headers)
3291 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3294 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3298 if (!assign_section_numbers (abfd, link_info))
3301 /* The backend linker builds symbol table information itself. */
3302 need_symtab = (link_info == NULL
3303 && (bfd_get_symcount (abfd) > 0
3304 || ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
3308 /* Non-zero if doing a relocatable link. */
3309 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3311 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3315 if (link_info == NULL)
3317 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3322 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3323 /* sh_name was set in prep_headers. */
3324 shstrtab_hdr->sh_type = SHT_STRTAB;
3325 shstrtab_hdr->sh_flags = 0;
3326 shstrtab_hdr->sh_addr = 0;
3327 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3328 shstrtab_hdr->sh_entsize = 0;
3329 shstrtab_hdr->sh_link = 0;
3330 shstrtab_hdr->sh_info = 0;
3331 /* sh_offset is set in assign_file_positions_except_relocs. */
3332 shstrtab_hdr->sh_addralign = 1;
3334 if (!assign_file_positions_except_relocs (abfd, link_info))
3340 Elf_Internal_Shdr *hdr;
3342 off = elf_tdata (abfd)->next_file_pos;
3344 hdr = &elf_tdata (abfd)->symtab_hdr;
3345 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3347 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3348 if (hdr->sh_size != 0)
3349 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3351 hdr = &elf_tdata (abfd)->strtab_hdr;
3352 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3354 elf_tdata (abfd)->next_file_pos = off;
3356 /* Now that we know where the .strtab section goes, write it
3358 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3359 || ! _bfd_stringtab_emit (abfd, strtab))
3361 _bfd_stringtab_free (strtab);
3364 abfd->output_has_begun = TRUE;
3369 /* Make an initial estimate of the size of the program header. If we
3370 get the number wrong here, we'll redo section placement. */
3372 static bfd_size_type
3373 get_program_header_size (bfd *abfd, struct bfd_link_info *info)
3377 const struct elf_backend_data *bed;
3379 /* Assume we will need exactly two PT_LOAD segments: one for text
3380 and one for data. */
3383 s = bfd_get_section_by_name (abfd, ".interp");
3384 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3386 /* If we have a loadable interpreter section, we need a
3387 PT_INTERP segment. In this case, assume we also need a
3388 PT_PHDR segment, although that may not be true for all
3393 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
3395 /* We need a PT_DYNAMIC segment. */
3399 if (info != NULL && info->relro)
3401 /* We need a PT_GNU_RELRO segment. */
3405 if (elf_tdata (abfd)->eh_frame_hdr)
3407 /* We need a PT_GNU_EH_FRAME segment. */
3411 if (elf_tdata (abfd)->stack_flags)
3413 /* We need a PT_GNU_STACK segment. */
3417 for (s = abfd->sections; s != NULL; s = s->next)
3419 if ((s->flags & SEC_LOAD) != 0
3420 && CONST_STRNEQ (s->name, ".note"))
3422 /* We need a PT_NOTE segment. */
3424 /* Try to create just one PT_NOTE segment
3425 for all adjacent loadable .note* sections.
3426 gABI requires that within a PT_NOTE segment
3427 (and also inside of each SHT_NOTE section)
3428 each note is padded to a multiple of 4 size,
3429 so we check whether the sections are correctly
3431 if (s->alignment_power == 2)
3432 while (s->next != NULL
3433 && s->next->alignment_power == 2
3434 && (s->next->flags & SEC_LOAD) != 0
3435 && CONST_STRNEQ (s->next->name, ".note"))
3440 for (s = abfd->sections; s != NULL; s = s->next)
3442 if (s->flags & SEC_THREAD_LOCAL)
3444 /* We need a PT_TLS segment. */
3450 /* Let the backend count up any program headers it might need. */
3451 bed = get_elf_backend_data (abfd);
3452 if (bed->elf_backend_additional_program_headers)
3456 a = (*bed->elf_backend_additional_program_headers) (abfd, info);
3462 return segs * bed->s->sizeof_phdr;
3465 /* Find the segment that contains the output_section of section. */
3468 _bfd_elf_find_segment_containing_section (bfd * abfd, asection * section)
3470 struct elf_segment_map *m;
3471 Elf_Internal_Phdr *p;
3473 for (m = elf_tdata (abfd)->segment_map,
3474 p = elf_tdata (abfd)->phdr;
3480 for (i = m->count - 1; i >= 0; i--)
3481 if (m->sections[i] == section)
3488 /* Create a mapping from a set of sections to a program segment. */
3490 static struct elf_segment_map *
3491 make_mapping (bfd *abfd,
3492 asection **sections,
3497 struct elf_segment_map *m;
3502 amt = sizeof (struct elf_segment_map);
3503 amt += (to - from - 1) * sizeof (asection *);
3504 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3508 m->p_type = PT_LOAD;
3509 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3510 m->sections[i - from] = *hdrpp;
3511 m->count = to - from;
3513 if (from == 0 && phdr)
3515 /* Include the headers in the first PT_LOAD segment. */
3516 m->includes_filehdr = 1;
3517 m->includes_phdrs = 1;
3523 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3526 struct elf_segment_map *
3527 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3529 struct elf_segment_map *m;
3531 m = (struct elf_segment_map *) bfd_zalloc (abfd,
3532 sizeof (struct elf_segment_map));
3536 m->p_type = PT_DYNAMIC;
3538 m->sections[0] = dynsec;
3543 /* Possibly add or remove segments from the segment map. */
3546 elf_modify_segment_map (bfd *abfd,
3547 struct bfd_link_info *info,
3548 bfd_boolean remove_empty_load)
3550 struct elf_segment_map **m;
3551 const struct elf_backend_data *bed;
3553 /* The placement algorithm assumes that non allocated sections are
3554 not in PT_LOAD segments. We ensure this here by removing such
3555 sections from the segment map. We also remove excluded
3556 sections. Finally, any PT_LOAD segment without sections is
3558 m = &elf_tdata (abfd)->segment_map;
3561 unsigned int i, new_count;
3563 for (new_count = 0, i = 0; i < (*m)->count; i++)
3565 if (((*m)->sections[i]->flags & SEC_EXCLUDE) == 0
3566 && (((*m)->sections[i]->flags & SEC_ALLOC) != 0
3567 || (*m)->p_type != PT_LOAD))
3569 (*m)->sections[new_count] = (*m)->sections[i];
3573 (*m)->count = new_count;
3575 if (remove_empty_load && (*m)->p_type == PT_LOAD && (*m)->count == 0)
3581 bed = get_elf_backend_data (abfd);
3582 if (bed->elf_backend_modify_segment_map != NULL)
3584 if (!(*bed->elf_backend_modify_segment_map) (abfd, info))
3591 /* Set up a mapping from BFD sections to program segments. */
3594 _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
3597 struct elf_segment_map *m;
3598 asection **sections = NULL;
3599 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3600 bfd_boolean no_user_phdrs;
3602 no_user_phdrs = elf_tdata (abfd)->segment_map == NULL;
3603 if (no_user_phdrs && bfd_count_sections (abfd) != 0)
3607 struct elf_segment_map *mfirst;
3608 struct elf_segment_map **pm;
3611 unsigned int phdr_index;
3612 bfd_vma maxpagesize;
3614 bfd_boolean phdr_in_segment = TRUE;
3615 bfd_boolean writable;
3617 asection *first_tls = NULL;
3618 asection *dynsec, *eh_frame_hdr;
3621 /* Select the allocated sections, and sort them. */
3623 sections = (asection **) bfd_malloc2 (bfd_count_sections (abfd),
3624 sizeof (asection *));
3625 if (sections == NULL)
3629 for (s = abfd->sections; s != NULL; s = s->next)
3631 if ((s->flags & SEC_ALLOC) != 0)
3637 BFD_ASSERT (i <= bfd_count_sections (abfd));
3640 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3642 /* Build the mapping. */
3647 /* If we have a .interp section, then create a PT_PHDR segment for
3648 the program headers and a PT_INTERP segment for the .interp
3650 s = bfd_get_section_by_name (abfd, ".interp");
3651 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3653 amt = sizeof (struct elf_segment_map);
3654 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3658 m->p_type = PT_PHDR;
3659 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3660 m->p_flags = PF_R | PF_X;
3661 m->p_flags_valid = 1;
3662 m->includes_phdrs = 1;
3667 amt = sizeof (struct elf_segment_map);
3668 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3672 m->p_type = PT_INTERP;
3680 /* Look through the sections. We put sections in the same program
3681 segment when the start of the second section can be placed within
3682 a few bytes of the end of the first section. */
3686 maxpagesize = bed->maxpagesize;
3688 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3690 && (dynsec->flags & SEC_LOAD) == 0)
3693 /* Deal with -Ttext or something similar such that the first section
3694 is not adjacent to the program headers. This is an
3695 approximation, since at this point we don't know exactly how many
3696 program headers we will need. */
3699 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
3701 if (phdr_size == (bfd_size_type) -1)
3702 phdr_size = get_program_header_size (abfd, info);
3703 if ((abfd->flags & D_PAGED) == 0
3704 || sections[0]->lma < phdr_size
3705 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3706 phdr_in_segment = FALSE;
3709 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3712 bfd_boolean new_segment;
3716 /* See if this section and the last one will fit in the same
3719 if (last_hdr == NULL)
3721 /* If we don't have a segment yet, then we don't need a new
3722 one (we build the last one after this loop). */
3723 new_segment = FALSE;
3725 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3727 /* If this section has a different relation between the
3728 virtual address and the load address, then we need a new
3732 /* In the next test we have to be careful when last_hdr->lma is close
3733 to the end of the address space. If the aligned address wraps
3734 around to the start of the address space, then there are no more
3735 pages left in memory and it is OK to assume that the current
3736 section can be included in the current segment. */
3737 else if ((BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
3739 && (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
3742 /* If putting this section in this segment would force us to
3743 skip a page in the segment, then we need a new segment. */
3746 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3747 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3749 /* We don't want to put a loadable section after a
3750 nonloadable section in the same segment.
3751 Consider .tbss sections as loadable for this purpose. */
3754 else if ((abfd->flags & D_PAGED) == 0)
3756 /* If the file is not demand paged, which means that we
3757 don't require the sections to be correctly aligned in the
3758 file, then there is no other reason for a new segment. */
3759 new_segment = FALSE;
3762 && (hdr->flags & SEC_READONLY) == 0
3763 && (((last_hdr->lma + last_size - 1)
3764 & ~(maxpagesize - 1))
3765 != (hdr->lma & ~(maxpagesize - 1))))
3767 /* We don't want to put a writable section in a read only
3768 segment, unless they are on the same page in memory
3769 anyhow. We already know that the last section does not
3770 bring us past the current section on the page, so the
3771 only case in which the new section is not on the same
3772 page as the previous section is when the previous section
3773 ends precisely on a page boundary. */
3778 /* Otherwise, we can use the same segment. */
3779 new_segment = FALSE;
3782 /* Allow interested parties a chance to override our decision. */
3783 if (last_hdr != NULL
3785 && info->callbacks->override_segment_assignment != NULL)
3787 = info->callbacks->override_segment_assignment (info, abfd, hdr,
3793 if ((hdr->flags & SEC_READONLY) == 0)
3796 /* .tbss sections effectively have zero size. */
3797 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
3798 != SEC_THREAD_LOCAL)
3799 last_size = hdr->size;
3805 /* We need a new program segment. We must create a new program
3806 header holding all the sections from phdr_index until hdr. */
3808 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3815 if ((hdr->flags & SEC_READONLY) == 0)
3821 /* .tbss sections effectively have zero size. */
3822 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3823 last_size = hdr->size;
3827 phdr_in_segment = FALSE;
3830 /* Create a final PT_LOAD program segment. */
3831 if (last_hdr != NULL)
3833 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3841 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3844 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
3851 /* For each batch of consecutive loadable .note sections,
3852 add a PT_NOTE segment. We don't use bfd_get_section_by_name,
3853 because if we link together nonloadable .note sections and
3854 loadable .note sections, we will generate two .note sections
3855 in the output file. FIXME: Using names for section types is
3857 for (s = abfd->sections; s != NULL; s = s->next)
3859 if ((s->flags & SEC_LOAD) != 0
3860 && CONST_STRNEQ (s->name, ".note"))
3865 amt = sizeof (struct elf_segment_map);
3866 if (s->alignment_power == 2)
3867 for (s2 = s; s2->next != NULL; s2 = s2->next)
3869 if (s2->next->alignment_power == 2
3870 && (s2->next->flags & SEC_LOAD) != 0
3871 && CONST_STRNEQ (s2->next->name, ".note")
3872 && align_power (s2->vma + s2->size, 2)
3878 amt += (count - 1) * sizeof (asection *);
3879 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3883 m->p_type = PT_NOTE;
3887 m->sections[m->count - count--] = s;
3888 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
3891 m->sections[m->count - 1] = s;
3892 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
3896 if (s->flags & SEC_THREAD_LOCAL)
3904 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3907 amt = sizeof (struct elf_segment_map);
3908 amt += (tls_count - 1) * sizeof (asection *);
3909 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3914 m->count = tls_count;
3915 /* Mandated PF_R. */
3917 m->p_flags_valid = 1;
3918 for (i = 0; i < (unsigned int) tls_count; ++i)
3920 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3921 m->sections[i] = first_tls;
3922 first_tls = first_tls->next;
3929 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3931 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3932 if (eh_frame_hdr != NULL
3933 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
3935 amt = sizeof (struct elf_segment_map);
3936 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3940 m->p_type = PT_GNU_EH_FRAME;
3942 m->sections[0] = eh_frame_hdr->output_section;
3948 if (elf_tdata (abfd)->stack_flags)
3950 amt = sizeof (struct elf_segment_map);
3951 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3955 m->p_type = PT_GNU_STACK;
3956 m->p_flags = elf_tdata (abfd)->stack_flags;
3957 m->p_flags_valid = 1;
3963 if (info != NULL && info->relro)
3965 for (m = mfirst; m != NULL; m = m->next)
3967 if (m->p_type == PT_LOAD)
3969 asection *last = m->sections[m->count - 1];
3970 bfd_vma vaddr = m->sections[0]->vma;
3971 bfd_vma filesz = last->vma - vaddr + last->size;
3973 if (vaddr < info->relro_end
3974 && vaddr >= info->relro_start
3975 && (vaddr + filesz) >= info->relro_end)
3980 /* Make a PT_GNU_RELRO segment only when it isn't empty. */
3983 amt = sizeof (struct elf_segment_map);
3984 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3988 m->p_type = PT_GNU_RELRO;
3990 m->p_flags_valid = 1;
3998 elf_tdata (abfd)->segment_map = mfirst;
4001 if (!elf_modify_segment_map (abfd, info, no_user_phdrs))
4004 for (count = 0, m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4006 elf_tdata (abfd)->program_header_size = count * bed->s->sizeof_phdr;
4011 if (sections != NULL)
4016 /* Sort sections by address. */
4019 elf_sort_sections (const void *arg1, const void *arg2)
4021 const asection *sec1 = *(const asection **) arg1;
4022 const asection *sec2 = *(const asection **) arg2;
4023 bfd_size_type size1, size2;
4025 /* Sort by LMA first, since this is the address used to
4026 place the section into a segment. */
4027 if (sec1->lma < sec2->lma)
4029 else if (sec1->lma > sec2->lma)
4032 /* Then sort by VMA. Normally the LMA and the VMA will be
4033 the same, and this will do nothing. */
4034 if (sec1->vma < sec2->vma)
4036 else if (sec1->vma > sec2->vma)
4039 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
4041 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
4047 /* If the indicies are the same, do not return 0
4048 here, but continue to try the next comparison. */
4049 if (sec1->target_index - sec2->target_index != 0)
4050 return sec1->target_index - sec2->target_index;
4055 else if (TOEND (sec2))
4060 /* Sort by size, to put zero sized sections
4061 before others at the same address. */
4063 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
4064 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
4071 return sec1->target_index - sec2->target_index;
4074 /* Ian Lance Taylor writes:
4076 We shouldn't be using % with a negative signed number. That's just
4077 not good. We have to make sure either that the number is not
4078 negative, or that the number has an unsigned type. When the types
4079 are all the same size they wind up as unsigned. When file_ptr is a
4080 larger signed type, the arithmetic winds up as signed long long,
4083 What we're trying to say here is something like ``increase OFF by
4084 the least amount that will cause it to be equal to the VMA modulo
4086 /* In other words, something like:
4088 vma_offset = m->sections[0]->vma % bed->maxpagesize;
4089 off_offset = off % bed->maxpagesize;
4090 if (vma_offset < off_offset)
4091 adjustment = vma_offset + bed->maxpagesize - off_offset;
4093 adjustment = vma_offset - off_offset;
4095 which can can be collapsed into the expression below. */
4098 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
4100 return ((vma - off) % maxpagesize);
4104 print_segment_map (const struct elf_segment_map *m)
4107 const char *pt = get_segment_type (m->p_type);
4112 if (m->p_type >= PT_LOPROC && m->p_type <= PT_HIPROC)
4113 sprintf (buf, "LOPROC+%7.7x",
4114 (unsigned int) (m->p_type - PT_LOPROC));
4115 else if (m->p_type >= PT_LOOS && m->p_type <= PT_HIOS)
4116 sprintf (buf, "LOOS+%7.7x",
4117 (unsigned int) (m->p_type - PT_LOOS));
4119 snprintf (buf, sizeof (buf), "%8.8x",
4120 (unsigned int) m->p_type);
4123 fprintf (stderr, "%s:", pt);
4124 for (j = 0; j < m->count; j++)
4125 fprintf (stderr, " %s", m->sections [j]->name);
4130 write_zeros (bfd *abfd, file_ptr pos, bfd_size_type len)
4135 if (bfd_seek (abfd, pos, SEEK_SET) != 0)
4137 buf = bfd_zmalloc (len);
4140 ret = bfd_bwrite (buf, len, abfd) == len;
4145 /* Assign file positions to the sections based on the mapping from
4146 sections to segments. This function also sets up some fields in
4150 assign_file_positions_for_load_sections (bfd *abfd,
4151 struct bfd_link_info *link_info)
4153 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4154 struct elf_segment_map *m;
4155 Elf_Internal_Phdr *phdrs;
4156 Elf_Internal_Phdr *p;
4158 bfd_size_type maxpagesize;
4161 bfd_vma header_pad = 0;
4163 if (link_info == NULL
4164 && !_bfd_elf_map_sections_to_segments (abfd, link_info))
4168 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4172 header_pad = m->header_size;
4175 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
4176 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
4177 elf_elfheader (abfd)->e_phnum = alloc;
4179 if (elf_tdata (abfd)->program_header_size == (bfd_size_type) -1)
4180 elf_tdata (abfd)->program_header_size = alloc * bed->s->sizeof_phdr;
4182 BFD_ASSERT (elf_tdata (abfd)->program_header_size
4183 >= alloc * bed->s->sizeof_phdr);
4187 elf_tdata (abfd)->next_file_pos = bed->s->sizeof_ehdr;
4191 /* We're writing the size in elf_tdata (abfd)->program_header_size,
4192 see assign_file_positions_except_relocs, so make sure we have
4193 that amount allocated, with trailing space cleared.
4194 The variable alloc contains the computed need, while elf_tdata
4195 (abfd)->program_header_size contains the size used for the
4197 See ld/emultempl/elf-generic.em:gld${EMULATION_NAME}_map_segments
4198 where the layout is forced to according to a larger size in the
4199 last iterations for the testcase ld-elf/header. */
4200 BFD_ASSERT (elf_tdata (abfd)->program_header_size % bed->s->sizeof_phdr
4202 phdrs = (Elf_Internal_Phdr *)
4204 (elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr),
4205 sizeof (Elf_Internal_Phdr));
4206 elf_tdata (abfd)->phdr = phdrs;
4211 if ((abfd->flags & D_PAGED) != 0)
4212 maxpagesize = bed->maxpagesize;
4214 off = bed->s->sizeof_ehdr;
4215 off += alloc * bed->s->sizeof_phdr;
4216 if (header_pad < (bfd_vma) off)
4222 for (m = elf_tdata (abfd)->segment_map, p = phdrs, j = 0;
4224 m = m->next, p++, j++)
4228 bfd_boolean no_contents;
4230 /* If elf_segment_map is not from map_sections_to_segments, the
4231 sections may not be correctly ordered. NOTE: sorting should
4232 not be done to the PT_NOTE section of a corefile, which may
4233 contain several pseudo-sections artificially created by bfd.
4234 Sorting these pseudo-sections breaks things badly. */
4236 && !(elf_elfheader (abfd)->e_type == ET_CORE
4237 && m->p_type == PT_NOTE))
4238 qsort (m->sections, (size_t) m->count, sizeof (asection *),
4241 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4242 number of sections with contents contributing to both p_filesz
4243 and p_memsz, followed by a number of sections with no contents
4244 that just contribute to p_memsz. In this loop, OFF tracks next
4245 available file offset for PT_LOAD and PT_NOTE segments. */
4246 p->p_type = m->p_type;
4247 p->p_flags = m->p_flags;
4252 p->p_vaddr = m->sections[0]->vma - m->p_vaddr_offset;
4254 if (m->p_paddr_valid)
4255 p->p_paddr = m->p_paddr;
4256 else if (m->count == 0)
4259 p->p_paddr = m->sections[0]->lma - m->p_vaddr_offset;
4261 if (p->p_type == PT_LOAD
4262 && (abfd->flags & D_PAGED) != 0)
4264 /* p_align in demand paged PT_LOAD segments effectively stores
4265 the maximum page size. When copying an executable with
4266 objcopy, we set m->p_align from the input file. Use this
4267 value for maxpagesize rather than bed->maxpagesize, which
4268 may be different. Note that we use maxpagesize for PT_TLS
4269 segment alignment later in this function, so we are relying
4270 on at least one PT_LOAD segment appearing before a PT_TLS
4272 if (m->p_align_valid)
4273 maxpagesize = m->p_align;
4275 p->p_align = maxpagesize;
4277 else if (m->p_align_valid)
4278 p->p_align = m->p_align;
4279 else if (m->count == 0)
4280 p->p_align = 1 << bed->s->log_file_align;
4284 no_contents = FALSE;
4286 if (p->p_type == PT_LOAD
4289 bfd_size_type align;
4290 unsigned int align_power = 0;
4292 if (m->p_align_valid)
4296 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4298 unsigned int secalign;
4300 secalign = bfd_get_section_alignment (abfd, *secpp);
4301 if (secalign > align_power)
4302 align_power = secalign;
4304 align = (bfd_size_type) 1 << align_power;
4305 if (align < maxpagesize)
4306 align = maxpagesize;
4309 for (i = 0; i < m->count; i++)
4310 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
4311 /* If we aren't making room for this section, then
4312 it must be SHT_NOBITS regardless of what we've
4313 set via struct bfd_elf_special_section. */
4314 elf_section_type (m->sections[i]) = SHT_NOBITS;
4316 /* Find out whether this segment contains any loadable
4319 for (i = 0; i < m->count; i++)
4320 if (elf_section_type (m->sections[i]) != SHT_NOBITS)
4322 no_contents = FALSE;
4326 off_adjust = vma_page_aligned_bias (m->sections[0]->vma, off, align);
4330 /* We shouldn't need to align the segment on disk since
4331 the segment doesn't need file space, but the gABI
4332 arguably requires the alignment and glibc ld.so
4333 checks it. So to comply with the alignment
4334 requirement but not waste file space, we adjust
4335 p_offset for just this segment. (OFF_ADJUST is
4336 subtracted from OFF later.) This may put p_offset
4337 past the end of file, but that shouldn't matter. */
4342 /* Make sure the .dynamic section is the first section in the
4343 PT_DYNAMIC segment. */
4344 else if (p->p_type == PT_DYNAMIC
4346 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4349 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4351 bfd_set_error (bfd_error_bad_value);
4354 /* Set the note section type to SHT_NOTE. */
4355 else if (p->p_type == PT_NOTE)
4356 for (i = 0; i < m->count; i++)
4357 elf_section_type (m->sections[i]) = SHT_NOTE;
4363 if (m->includes_filehdr)
4365 if (!m->p_flags_valid)
4367 p->p_filesz = bed->s->sizeof_ehdr;
4368 p->p_memsz = bed->s->sizeof_ehdr;
4371 BFD_ASSERT (p->p_type == PT_LOAD);
4373 if (p->p_vaddr < (bfd_vma) off)
4375 (*_bfd_error_handler)
4376 (_("%B: Not enough room for program headers, try linking with -N"),
4378 bfd_set_error (bfd_error_bad_value);
4383 if (!m->p_paddr_valid)
4388 if (m->includes_phdrs)
4390 if (!m->p_flags_valid)
4393 if (!m->includes_filehdr)
4395 p->p_offset = bed->s->sizeof_ehdr;
4399 BFD_ASSERT (p->p_type == PT_LOAD);
4400 p->p_vaddr -= off - p->p_offset;
4401 if (!m->p_paddr_valid)
4402 p->p_paddr -= off - p->p_offset;
4406 p->p_filesz += alloc * bed->s->sizeof_phdr;
4407 p->p_memsz += alloc * bed->s->sizeof_phdr;
4410 p->p_filesz += header_pad;
4411 p->p_memsz += header_pad;
4415 if (p->p_type == PT_LOAD
4416 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4418 if (!m->includes_filehdr && !m->includes_phdrs)
4424 adjust = off - (p->p_offset + p->p_filesz);
4426 p->p_filesz += adjust;
4427 p->p_memsz += adjust;
4431 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
4432 maps. Set filepos for sections in PT_LOAD segments, and in
4433 core files, for sections in PT_NOTE segments.
4434 assign_file_positions_for_non_load_sections will set filepos
4435 for other sections and update p_filesz for other segments. */
4436 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4439 bfd_size_type align;
4440 Elf_Internal_Shdr *this_hdr;
4443 this_hdr = &elf_section_data (sec)->this_hdr;
4444 align = (bfd_size_type) 1 << bfd_get_section_alignment (abfd, sec);
4446 if ((p->p_type == PT_LOAD
4447 || p->p_type == PT_TLS)
4448 && (this_hdr->sh_type != SHT_NOBITS
4449 || ((this_hdr->sh_flags & SHF_ALLOC) != 0
4450 && ((this_hdr->sh_flags & SHF_TLS) == 0
4451 || p->p_type == PT_TLS))))
4453 bfd_signed_vma adjust = sec->vma - (p->p_vaddr + p->p_memsz);
4457 (*_bfd_error_handler)
4458 (_("%B: section %A vma 0x%lx overlaps previous sections"),
4459 abfd, sec, (unsigned long) sec->vma);
4462 p->p_memsz += adjust;
4464 if (p->p_paddr + p->p_memsz != sec->lma)
4466 /* This behavior is a compromise--ld has long
4467 silently changed the lma of sections when
4468 lma - vma is not equal for every section in a
4469 pheader--but only in the internal elf structures.
4470 Silently changing the lma is probably a bug, but
4471 changing it would have subtle and unknown
4472 consequences for existing scripts.
4474 Instead modify the bfd data structure to reflect
4475 what happened. This at least fixes the values
4476 for the lma in the mapfile. */
4477 sec->lma = p->p_paddr + p->p_memsz;
4480 if (this_hdr->sh_type != SHT_NOBITS)
4482 if (p->p_filesz + adjust < p->p_memsz)
4484 /* We have a PROGBITS section following NOBITS ones.
4485 Allocate file space for the NOBITS section(s) and
4487 adjust = p->p_memsz - p->p_filesz;
4488 if (!write_zeros (abfd, off, adjust))
4492 p->p_filesz += adjust;
4496 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4498 /* The section at i == 0 is the one that actually contains
4502 this_hdr->sh_offset = sec->filepos = off;
4503 off += this_hdr->sh_size;
4504 p->p_filesz = this_hdr->sh_size;
4510 /* The rest are fake sections that shouldn't be written. */
4519 if (p->p_type == PT_LOAD)
4521 this_hdr->sh_offset = sec->filepos = off;
4522 if (this_hdr->sh_type != SHT_NOBITS)
4523 off += this_hdr->sh_size;
4526 if (this_hdr->sh_type != SHT_NOBITS)
4528 p->p_filesz += this_hdr->sh_size;
4529 /* A load section without SHF_ALLOC is something like
4530 a note section in a PT_NOTE segment. These take
4531 file space but are not loaded into memory. */
4532 if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4533 p->p_memsz += this_hdr->sh_size;
4535 else if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4537 if (p->p_type == PT_TLS)
4538 p->p_memsz += this_hdr->sh_size;
4540 /* .tbss is special. It doesn't contribute to p_memsz of
4542 else if ((this_hdr->sh_flags & SHF_TLS) == 0)
4543 p->p_memsz += this_hdr->sh_size;
4546 if (align > p->p_align
4547 && !m->p_align_valid
4548 && (p->p_type != PT_LOAD
4549 || (abfd->flags & D_PAGED) == 0))
4553 if (!m->p_flags_valid)
4556 if ((this_hdr->sh_flags & SHF_EXECINSTR) != 0)
4558 if ((this_hdr->sh_flags & SHF_WRITE) != 0)
4564 /* Check that all sections are in a PT_LOAD segment.
4565 Don't check funky gdb generated core files. */
4566 if (p->p_type == PT_LOAD && bfd_get_format (abfd) != bfd_core)
4567 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4569 Elf_Internal_Shdr *this_hdr;
4573 this_hdr = &(elf_section_data(sec)->this_hdr);
4574 if (this_hdr->sh_size != 0
4575 && !ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, p))
4577 (*_bfd_error_handler)
4578 (_("%B: section `%A' can't be allocated in segment %d"),
4580 print_segment_map (m);
4581 bfd_set_error (bfd_error_bad_value);
4587 elf_tdata (abfd)->next_file_pos = off;
4591 /* Assign file positions for the other sections. */
4594 assign_file_positions_for_non_load_sections (bfd *abfd,
4595 struct bfd_link_info *link_info)
4597 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4598 Elf_Internal_Shdr **i_shdrpp;
4599 Elf_Internal_Shdr **hdrpp;
4600 Elf_Internal_Phdr *phdrs;
4601 Elf_Internal_Phdr *p;
4602 struct elf_segment_map *m;
4603 bfd_vma filehdr_vaddr, filehdr_paddr;
4604 bfd_vma phdrs_vaddr, phdrs_paddr;
4606 unsigned int num_sec;
4610 i_shdrpp = elf_elfsections (abfd);
4611 num_sec = elf_numsections (abfd);
4612 off = elf_tdata (abfd)->next_file_pos;
4613 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4615 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4616 Elf_Internal_Shdr *hdr;
4619 if (hdr->bfd_section != NULL
4620 && (hdr->bfd_section->filepos != 0
4621 || (hdr->sh_type == SHT_NOBITS
4622 && hdr->contents == NULL)))
4623 BFD_ASSERT (hdr->sh_offset == hdr->bfd_section->filepos);
4624 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4626 if (hdr->sh_size != 0)
4627 ((*_bfd_error_handler)
4628 (_("%B: warning: allocated section `%s' not in segment"),
4630 (hdr->bfd_section == NULL
4632 : hdr->bfd_section->name)));
4633 /* We don't need to page align empty sections. */
4634 if ((abfd->flags & D_PAGED) != 0 && hdr->sh_size != 0)
4635 off += vma_page_aligned_bias (hdr->sh_addr, off,
4638 off += vma_page_aligned_bias (hdr->sh_addr, off,
4640 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4643 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4644 && hdr->bfd_section == NULL)
4645 || hdr == i_shdrpp[tdata->symtab_section]
4646 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4647 || hdr == i_shdrpp[tdata->strtab_section])
4648 hdr->sh_offset = -1;
4650 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4653 /* Now that we have set the section file positions, we can set up
4654 the file positions for the non PT_LOAD segments. */
4658 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4660 phdrs = elf_tdata (abfd)->phdr;
4661 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4666 if (p->p_type != PT_LOAD)
4669 if (m->includes_filehdr)
4671 filehdr_vaddr = p->p_vaddr;
4672 filehdr_paddr = p->p_paddr;
4674 if (m->includes_phdrs)
4676 phdrs_vaddr = p->p_vaddr;
4677 phdrs_paddr = p->p_paddr;
4678 if (m->includes_filehdr)
4680 phdrs_vaddr += bed->s->sizeof_ehdr;
4681 phdrs_paddr += bed->s->sizeof_ehdr;
4686 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4690 if (p->p_type == PT_GNU_RELRO)
4692 const Elf_Internal_Phdr *lp;
4694 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
4696 if (link_info != NULL)
4698 /* During linking the range of the RELRO segment is passed
4700 for (lp = phdrs; lp < phdrs + count; ++lp)
4702 if (lp->p_type == PT_LOAD
4703 && lp->p_vaddr >= link_info->relro_start
4704 && lp->p_vaddr < link_info->relro_end
4705 && lp->p_vaddr + lp->p_filesz >= link_info->relro_end)
4711 /* Otherwise we are copying an executable or shared
4712 library, but we need to use the same linker logic. */
4713 for (lp = phdrs; lp < phdrs + count; ++lp)
4715 if (lp->p_type == PT_LOAD
4716 && lp->p_paddr == p->p_paddr)
4721 if (lp < phdrs + count)
4723 p->p_vaddr = lp->p_vaddr;
4724 p->p_paddr = lp->p_paddr;
4725 p->p_offset = lp->p_offset;
4726 if (link_info != NULL)
4727 p->p_filesz = link_info->relro_end - lp->p_vaddr;
4728 else if (m->p_size_valid)
4729 p->p_filesz = m->p_size;
4732 p->p_memsz = p->p_filesz;
4734 p->p_flags = (lp->p_flags & ~PF_W);
4738 memset (p, 0, sizeof *p);
4739 p->p_type = PT_NULL;
4742 else if (m->count != 0)
4744 if (p->p_type != PT_LOAD
4745 && (p->p_type != PT_NOTE
4746 || bfd_get_format (abfd) != bfd_core))
4748 Elf_Internal_Shdr *hdr;
4751 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
4753 sect = m->sections[m->count - 1];
4754 hdr = &elf_section_data (sect)->this_hdr;
4755 p->p_filesz = sect->filepos - m->sections[0]->filepos;
4756 if (hdr->sh_type != SHT_NOBITS)
4757 p->p_filesz += hdr->sh_size;
4758 p->p_offset = m->sections[0]->filepos;
4761 else if (m->includes_filehdr)
4763 p->p_vaddr = filehdr_vaddr;
4764 if (! m->p_paddr_valid)
4765 p->p_paddr = filehdr_paddr;
4767 else if (m->includes_phdrs)
4769 p->p_vaddr = phdrs_vaddr;
4770 if (! m->p_paddr_valid)
4771 p->p_paddr = phdrs_paddr;
4775 elf_tdata (abfd)->next_file_pos = off;
4780 /* Work out the file positions of all the sections. This is called by
4781 _bfd_elf_compute_section_file_positions. All the section sizes and
4782 VMAs must be known before this is called.
4784 Reloc sections come in two flavours: Those processed specially as
4785 "side-channel" data attached to a section to which they apply, and
4786 those that bfd doesn't process as relocations. The latter sort are
4787 stored in a normal bfd section by bfd_section_from_shdr. We don't
4788 consider the former sort here, unless they form part of the loadable
4789 image. Reloc sections not assigned here will be handled later by
4790 assign_file_positions_for_relocs.
4792 We also don't set the positions of the .symtab and .strtab here. */
4795 assign_file_positions_except_relocs (bfd *abfd,
4796 struct bfd_link_info *link_info)
4798 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4799 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4801 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4803 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4804 && bfd_get_format (abfd) != bfd_core)
4806 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4807 unsigned int num_sec = elf_numsections (abfd);
4808 Elf_Internal_Shdr **hdrpp;
4811 /* Start after the ELF header. */
4812 off = i_ehdrp->e_ehsize;
4814 /* We are not creating an executable, which means that we are
4815 not creating a program header, and that the actual order of
4816 the sections in the file is unimportant. */
4817 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4819 Elf_Internal_Shdr *hdr;
4822 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4823 && hdr->bfd_section == NULL)
4824 || i == tdata->symtab_section
4825 || i == tdata->symtab_shndx_section
4826 || i == tdata->strtab_section)
4828 hdr->sh_offset = -1;
4831 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4838 /* Assign file positions for the loaded sections based on the
4839 assignment of sections to segments. */
4840 if (!assign_file_positions_for_load_sections (abfd, link_info))
4843 /* And for non-load sections. */
4844 if (!assign_file_positions_for_non_load_sections (abfd, link_info))
4847 if (bed->elf_backend_modify_program_headers != NULL)
4849 if (!(*bed->elf_backend_modify_program_headers) (abfd, link_info))
4853 /* Write out the program headers. */
4854 alloc = tdata->program_header_size / bed->s->sizeof_phdr;
4855 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4856 || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
4859 off = tdata->next_file_pos;
4862 /* Place the section headers. */
4863 off = align_file_position (off, 1 << bed->s->log_file_align);
4864 i_ehdrp->e_shoff = off;
4865 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4867 tdata->next_file_pos = off;
4873 prep_headers (bfd *abfd)
4875 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4876 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4877 struct elf_strtab_hash *shstrtab;
4878 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4880 i_ehdrp = elf_elfheader (abfd);
4882 shstrtab = _bfd_elf_strtab_init ();
4883 if (shstrtab == NULL)
4886 elf_shstrtab (abfd) = shstrtab;
4888 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4889 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4890 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4891 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4893 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4894 i_ehdrp->e_ident[EI_DATA] =
4895 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4896 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4898 if ((abfd->flags & DYNAMIC) != 0)
4899 i_ehdrp->e_type = ET_DYN;
4900 else if ((abfd->flags & EXEC_P) != 0)
4901 i_ehdrp->e_type = ET_EXEC;
4902 else if (bfd_get_format (abfd) == bfd_core)
4903 i_ehdrp->e_type = ET_CORE;
4905 i_ehdrp->e_type = ET_REL;
4907 switch (bfd_get_arch (abfd))
4909 case bfd_arch_unknown:
4910 i_ehdrp->e_machine = EM_NONE;
4913 /* There used to be a long list of cases here, each one setting
4914 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4915 in the corresponding bfd definition. To avoid duplication,
4916 the switch was removed. Machines that need special handling
4917 can generally do it in elf_backend_final_write_processing(),
4918 unless they need the information earlier than the final write.
4919 Such need can generally be supplied by replacing the tests for
4920 e_machine with the conditions used to determine it. */
4922 i_ehdrp->e_machine = bed->elf_machine_code;
4925 i_ehdrp->e_version = bed->s->ev_current;
4926 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4928 /* No program header, for now. */
4929 i_ehdrp->e_phoff = 0;
4930 i_ehdrp->e_phentsize = 0;
4931 i_ehdrp->e_phnum = 0;
4933 /* Each bfd section is section header entry. */
4934 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4935 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4937 /* If we're building an executable, we'll need a program header table. */
4938 if (abfd->flags & EXEC_P)
4939 /* It all happens later. */
4943 i_ehdrp->e_phentsize = 0;
4945 i_ehdrp->e_phoff = 0;
4948 elf_tdata (abfd)->symtab_hdr.sh_name =
4949 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
4950 elf_tdata (abfd)->strtab_hdr.sh_name =
4951 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
4952 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4953 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
4954 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4955 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4956 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4962 /* Assign file positions for all the reloc sections which are not part
4963 of the loadable file image. */
4966 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
4969 unsigned int i, num_sec;
4970 Elf_Internal_Shdr **shdrpp;
4972 off = elf_tdata (abfd)->next_file_pos;
4974 num_sec = elf_numsections (abfd);
4975 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4977 Elf_Internal_Shdr *shdrp;
4980 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4981 && shdrp->sh_offset == -1)
4982 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
4985 elf_tdata (abfd)->next_file_pos = off;
4989 _bfd_elf_write_object_contents (bfd *abfd)
4991 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4992 Elf_Internal_Ehdr *i_ehdrp;
4993 Elf_Internal_Shdr **i_shdrp;
4995 unsigned int count, num_sec;
4997 if (! abfd->output_has_begun
4998 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
5001 i_shdrp = elf_elfsections (abfd);
5002 i_ehdrp = elf_elfheader (abfd);
5005 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
5009 _bfd_elf_assign_file_positions_for_relocs (abfd);
5011 /* After writing the headers, we need to write the sections too... */
5012 num_sec = elf_numsections (abfd);
5013 for (count = 1; count < num_sec; count++)
5015 if (bed->elf_backend_section_processing)
5016 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
5017 if (i_shdrp[count]->contents)
5019 bfd_size_type amt = i_shdrp[count]->sh_size;
5021 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
5022 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
5027 /* Write out the section header names. */
5028 if (elf_shstrtab (abfd) != NULL
5029 && (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
5030 || !_bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
5033 if (bed->elf_backend_final_write_processing)
5034 (*bed->elf_backend_final_write_processing) (abfd,
5035 elf_tdata (abfd)->linker);
5037 if (!bed->s->write_shdrs_and_ehdr (abfd))
5040 /* This is last since write_shdrs_and_ehdr can touch i_shdrp[0]. */
5041 if (elf_tdata (abfd)->after_write_object_contents)
5042 return (*elf_tdata (abfd)->after_write_object_contents) (abfd);
5048 _bfd_elf_write_corefile_contents (bfd *abfd)
5050 /* Hopefully this can be done just like an object file. */
5051 return _bfd_elf_write_object_contents (abfd);
5054 /* Given a section, search the header to find them. */
5057 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
5059 const struct elf_backend_data *bed;
5060 unsigned int sec_index;
5062 if (elf_section_data (asect) != NULL
5063 && elf_section_data (asect)->this_idx != 0)
5064 return elf_section_data (asect)->this_idx;
5066 if (bfd_is_abs_section (asect))
5067 sec_index = SHN_ABS;
5068 else if (bfd_is_com_section (asect))
5069 sec_index = SHN_COMMON;
5070 else if (bfd_is_und_section (asect))
5071 sec_index = SHN_UNDEF;
5073 sec_index = SHN_BAD;
5075 bed = get_elf_backend_data (abfd);
5076 if (bed->elf_backend_section_from_bfd_section)
5078 int retval = sec_index;
5080 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
5084 if (sec_index == SHN_BAD)
5085 bfd_set_error (bfd_error_nonrepresentable_section);
5090 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
5094 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
5096 asymbol *asym_ptr = *asym_ptr_ptr;
5098 flagword flags = asym_ptr->flags;
5100 /* When gas creates relocations against local labels, it creates its
5101 own symbol for the section, but does put the symbol into the
5102 symbol chain, so udata is 0. When the linker is generating
5103 relocatable output, this section symbol may be for one of the
5104 input sections rather than the output section. */
5105 if (asym_ptr->udata.i == 0
5106 && (flags & BSF_SECTION_SYM)
5107 && asym_ptr->section)
5112 sec = asym_ptr->section;
5113 if (sec->owner != abfd && sec->output_section != NULL)
5114 sec = sec->output_section;
5115 if (sec->owner == abfd
5116 && (indx = sec->index) < elf_num_section_syms (abfd)
5117 && elf_section_syms (abfd)[indx] != NULL)
5118 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
5121 idx = asym_ptr->udata.i;
5125 /* This case can occur when using --strip-symbol on a symbol
5126 which is used in a relocation entry. */
5127 (*_bfd_error_handler)
5128 (_("%B: symbol `%s' required but not present"),
5129 abfd, bfd_asymbol_name (asym_ptr));
5130 bfd_set_error (bfd_error_no_symbols);
5137 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
5138 (long) asym_ptr, asym_ptr->name, idx, flags,
5139 elf_symbol_flags (flags));
5147 /* Rewrite program header information. */
5150 rewrite_elf_program_header (bfd *ibfd, bfd *obfd)
5152 Elf_Internal_Ehdr *iehdr;
5153 struct elf_segment_map *map;
5154 struct elf_segment_map *map_first;
5155 struct elf_segment_map **pointer_to_map;
5156 Elf_Internal_Phdr *segment;
5159 unsigned int num_segments;
5160 bfd_boolean phdr_included = FALSE;
5161 bfd_boolean p_paddr_valid;
5162 bfd_vma maxpagesize;
5163 struct elf_segment_map *phdr_adjust_seg = NULL;
5164 unsigned int phdr_adjust_num = 0;
5165 const struct elf_backend_data *bed;
5167 bed = get_elf_backend_data (ibfd);
5168 iehdr = elf_elfheader (ibfd);
5171 pointer_to_map = &map_first;
5173 num_segments = elf_elfheader (ibfd)->e_phnum;
5174 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
5176 /* Returns the end address of the segment + 1. */
5177 #define SEGMENT_END(segment, start) \
5178 (start + (segment->p_memsz > segment->p_filesz \
5179 ? segment->p_memsz : segment->p_filesz))
5181 #define SECTION_SIZE(section, segment) \
5182 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5183 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5184 ? section->size : 0)
5186 /* Returns TRUE if the given section is contained within
5187 the given segment. VMA addresses are compared. */
5188 #define IS_CONTAINED_BY_VMA(section, segment) \
5189 (section->vma >= segment->p_vaddr \
5190 && (section->vma + SECTION_SIZE (section, segment) \
5191 <= (SEGMENT_END (segment, segment->p_vaddr))))
5193 /* Returns TRUE if the given section is contained within
5194 the given segment. LMA addresses are compared. */
5195 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5196 (section->lma >= base \
5197 && (section->lma + SECTION_SIZE (section, segment) \
5198 <= SEGMENT_END (segment, base)))
5200 /* Handle PT_NOTE segment. */
5201 #define IS_NOTE(p, s) \
5202 (p->p_type == PT_NOTE \
5203 && elf_section_type (s) == SHT_NOTE \
5204 && (bfd_vma) s->filepos >= p->p_offset \
5205 && ((bfd_vma) s->filepos + s->size \
5206 <= p->p_offset + p->p_filesz))
5208 /* Special case: corefile "NOTE" section containing regs, prpsinfo
5210 #define IS_COREFILE_NOTE(p, s) \
5212 && bfd_get_format (ibfd) == bfd_core \
5216 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5217 linker, which generates a PT_INTERP section with p_vaddr and
5218 p_memsz set to 0. */
5219 #define IS_SOLARIS_PT_INTERP(p, s) \
5221 && p->p_paddr == 0 \
5222 && p->p_memsz == 0 \
5223 && p->p_filesz > 0 \
5224 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5226 && (bfd_vma) s->filepos >= p->p_offset \
5227 && ((bfd_vma) s->filepos + s->size \
5228 <= p->p_offset + p->p_filesz))
5230 /* Decide if the given section should be included in the given segment.
5231 A section will be included if:
5232 1. It is within the address space of the segment -- we use the LMA
5233 if that is set for the segment and the VMA otherwise,
5234 2. It is an allocated section or a NOTE section in a PT_NOTE
5236 3. There is an output section associated with it,
5237 4. The section has not already been allocated to a previous segment.
5238 5. PT_GNU_STACK segments do not include any sections.
5239 6. PT_TLS segment includes only SHF_TLS sections.
5240 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5241 8. PT_DYNAMIC should not contain empty sections at the beginning
5242 (with the possible exception of .dynamic). */
5243 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
5244 ((((segment->p_paddr \
5245 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5246 : IS_CONTAINED_BY_VMA (section, segment)) \
5247 && (section->flags & SEC_ALLOC) != 0) \
5248 || IS_NOTE (segment, section)) \
5249 && segment->p_type != PT_GNU_STACK \
5250 && (segment->p_type != PT_TLS \
5251 || (section->flags & SEC_THREAD_LOCAL)) \
5252 && (segment->p_type == PT_LOAD \
5253 || segment->p_type == PT_TLS \
5254 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5255 && (segment->p_type != PT_DYNAMIC \
5256 || SECTION_SIZE (section, segment) > 0 \
5257 || (segment->p_paddr \
5258 ? segment->p_paddr != section->lma \
5259 : segment->p_vaddr != section->vma) \
5260 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5262 && !section->segment_mark)
5264 /* If the output section of a section in the input segment is NULL,
5265 it is removed from the corresponding output segment. */
5266 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5267 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
5268 && section->output_section != NULL)
5270 /* Returns TRUE iff seg1 starts after the end of seg2. */
5271 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5272 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5274 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5275 their VMA address ranges and their LMA address ranges overlap.
5276 It is possible to have overlapping VMA ranges without overlapping LMA
5277 ranges. RedBoot images for example can have both .data and .bss mapped
5278 to the same VMA range, but with the .data section mapped to a different
5280 #define SEGMENT_OVERLAPS(seg1, seg2) \
5281 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5282 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5283 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5284 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5286 /* Initialise the segment mark field. */
5287 for (section = ibfd->sections; section != NULL; section = section->next)
5288 section->segment_mark = FALSE;
5290 /* The Solaris linker creates program headers in which all the
5291 p_paddr fields are zero. When we try to objcopy or strip such a
5292 file, we get confused. Check for this case, and if we find it
5293 don't set the p_paddr_valid fields. */
5294 p_paddr_valid = FALSE;
5295 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5298 if (segment->p_paddr != 0)
5300 p_paddr_valid = TRUE;
5304 /* Scan through the segments specified in the program header
5305 of the input BFD. For this first scan we look for overlaps
5306 in the loadable segments. These can be created by weird
5307 parameters to objcopy. Also, fix some solaris weirdness. */
5308 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5313 Elf_Internal_Phdr *segment2;
5315 if (segment->p_type == PT_INTERP)
5316 for (section = ibfd->sections; section; section = section->next)
5317 if (IS_SOLARIS_PT_INTERP (segment, section))
5319 /* Mininal change so that the normal section to segment
5320 assignment code will work. */
5321 segment->p_vaddr = section->vma;
5325 if (segment->p_type != PT_LOAD)
5327 /* Remove PT_GNU_RELRO segment. */
5328 if (segment->p_type == PT_GNU_RELRO)
5329 segment->p_type = PT_NULL;
5333 /* Determine if this segment overlaps any previous segments. */
5334 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2++)
5336 bfd_signed_vma extra_length;
5338 if (segment2->p_type != PT_LOAD
5339 || !SEGMENT_OVERLAPS (segment, segment2))
5342 /* Merge the two segments together. */
5343 if (segment2->p_vaddr < segment->p_vaddr)
5345 /* Extend SEGMENT2 to include SEGMENT and then delete
5347 extra_length = (SEGMENT_END (segment, segment->p_vaddr)
5348 - SEGMENT_END (segment2, segment2->p_vaddr));
5350 if (extra_length > 0)
5352 segment2->p_memsz += extra_length;
5353 segment2->p_filesz += extra_length;
5356 segment->p_type = PT_NULL;
5358 /* Since we have deleted P we must restart the outer loop. */
5360 segment = elf_tdata (ibfd)->phdr;
5365 /* Extend SEGMENT to include SEGMENT2 and then delete
5367 extra_length = (SEGMENT_END (segment2, segment2->p_vaddr)
5368 - SEGMENT_END (segment, segment->p_vaddr));
5370 if (extra_length > 0)
5372 segment->p_memsz += extra_length;
5373 segment->p_filesz += extra_length;
5376 segment2->p_type = PT_NULL;
5381 /* The second scan attempts to assign sections to segments. */
5382 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5386 unsigned int section_count;
5387 asection **sections;
5388 asection *output_section;
5390 bfd_vma matching_lma;
5391 bfd_vma suggested_lma;
5394 asection *first_section;
5395 bfd_boolean first_matching_lma;
5396 bfd_boolean first_suggested_lma;
5398 if (segment->p_type == PT_NULL)
5401 first_section = NULL;
5402 /* Compute how many sections might be placed into this segment. */
5403 for (section = ibfd->sections, section_count = 0;
5405 section = section->next)
5407 /* Find the first section in the input segment, which may be
5408 removed from the corresponding output segment. */
5409 if (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed))
5411 if (first_section == NULL)
5412 first_section = section;
5413 if (section->output_section != NULL)
5418 /* Allocate a segment map big enough to contain
5419 all of the sections we have selected. */
5420 amt = sizeof (struct elf_segment_map);
5421 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5422 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
5426 /* Initialise the fields of the segment map. Default to
5427 using the physical address of the segment in the input BFD. */
5429 map->p_type = segment->p_type;
5430 map->p_flags = segment->p_flags;
5431 map->p_flags_valid = 1;
5433 /* If the first section in the input segment is removed, there is
5434 no need to preserve segment physical address in the corresponding
5436 if (!first_section || first_section->output_section != NULL)
5438 map->p_paddr = segment->p_paddr;
5439 map->p_paddr_valid = p_paddr_valid;
5442 /* Determine if this segment contains the ELF file header
5443 and if it contains the program headers themselves. */
5444 map->includes_filehdr = (segment->p_offset == 0
5445 && segment->p_filesz >= iehdr->e_ehsize);
5446 map->includes_phdrs = 0;
5448 if (!phdr_included || segment->p_type != PT_LOAD)
5450 map->includes_phdrs =
5451 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5452 && (segment->p_offset + segment->p_filesz
5453 >= ((bfd_vma) iehdr->e_phoff
5454 + iehdr->e_phnum * iehdr->e_phentsize)));
5456 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5457 phdr_included = TRUE;
5460 if (section_count == 0)
5462 /* Special segments, such as the PT_PHDR segment, may contain
5463 no sections, but ordinary, loadable segments should contain
5464 something. They are allowed by the ELF spec however, so only
5465 a warning is produced. */
5466 if (segment->p_type == PT_LOAD)
5467 (*_bfd_error_handler) (_("%B: warning: Empty loadable segment"
5468 " detected, is this intentional ?\n"),
5472 *pointer_to_map = map;
5473 pointer_to_map = &map->next;
5478 /* Now scan the sections in the input BFD again and attempt
5479 to add their corresponding output sections to the segment map.
5480 The problem here is how to handle an output section which has
5481 been moved (ie had its LMA changed). There are four possibilities:
5483 1. None of the sections have been moved.
5484 In this case we can continue to use the segment LMA from the
5487 2. All of the sections have been moved by the same amount.
5488 In this case we can change the segment's LMA to match the LMA
5489 of the first section.
5491 3. Some of the sections have been moved, others have not.
5492 In this case those sections which have not been moved can be
5493 placed in the current segment which will have to have its size,
5494 and possibly its LMA changed, and a new segment or segments will
5495 have to be created to contain the other sections.
5497 4. The sections have been moved, but not by the same amount.
5498 In this case we can change the segment's LMA to match the LMA
5499 of the first section and we will have to create a new segment
5500 or segments to contain the other sections.
5502 In order to save time, we allocate an array to hold the section
5503 pointers that we are interested in. As these sections get assigned
5504 to a segment, they are removed from this array. */
5506 sections = (asection **) bfd_malloc2 (section_count, sizeof (asection *));
5507 if (sections == NULL)
5510 /* Step One: Scan for segment vs section LMA conflicts.
5511 Also add the sections to the section array allocated above.
5512 Also add the sections to the current segment. In the common
5513 case, where the sections have not been moved, this means that
5514 we have completely filled the segment, and there is nothing
5519 first_matching_lma = TRUE;
5520 first_suggested_lma = TRUE;
5522 for (section = ibfd->sections;
5524 section = section->next)
5525 if (section == first_section)
5528 for (j = 0; section != NULL; section = section->next)
5530 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5532 output_section = section->output_section;
5534 sections[j++] = section;
5536 /* The Solaris native linker always sets p_paddr to 0.
5537 We try to catch that case here, and set it to the
5538 correct value. Note - some backends require that
5539 p_paddr be left as zero. */
5541 && segment->p_vaddr != 0
5542 && !bed->want_p_paddr_set_to_zero
5544 && output_section->lma != 0
5545 && output_section->vma == (segment->p_vaddr
5546 + (map->includes_filehdr
5549 + (map->includes_phdrs
5551 * iehdr->e_phentsize)
5553 map->p_paddr = segment->p_vaddr;
5555 /* Match up the physical address of the segment with the
5556 LMA address of the output section. */
5557 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5558 || IS_COREFILE_NOTE (segment, section)
5559 || (bed->want_p_paddr_set_to_zero
5560 && IS_CONTAINED_BY_VMA (output_section, segment)))
5562 if (first_matching_lma || output_section->lma < matching_lma)
5564 matching_lma = output_section->lma;
5565 first_matching_lma = FALSE;
5568 /* We assume that if the section fits within the segment
5569 then it does not overlap any other section within that
5571 map->sections[isec++] = output_section;
5573 else if (first_suggested_lma)
5575 suggested_lma = output_section->lma;
5576 first_suggested_lma = FALSE;
5579 if (j == section_count)
5584 BFD_ASSERT (j == section_count);
5586 /* Step Two: Adjust the physical address of the current segment,
5588 if (isec == section_count)
5590 /* All of the sections fitted within the segment as currently
5591 specified. This is the default case. Add the segment to
5592 the list of built segments and carry on to process the next
5593 program header in the input BFD. */
5594 map->count = section_count;
5595 *pointer_to_map = map;
5596 pointer_to_map = &map->next;
5599 && !bed->want_p_paddr_set_to_zero
5600 && matching_lma != map->p_paddr
5601 && !map->includes_filehdr
5602 && !map->includes_phdrs)
5603 /* There is some padding before the first section in the
5604 segment. So, we must account for that in the output
5606 map->p_vaddr_offset = matching_lma - map->p_paddr;
5613 if (!first_matching_lma)
5615 /* At least one section fits inside the current segment.
5616 Keep it, but modify its physical address to match the
5617 LMA of the first section that fitted. */
5618 map->p_paddr = matching_lma;
5622 /* None of the sections fitted inside the current segment.
5623 Change the current segment's physical address to match
5624 the LMA of the first section. */
5625 map->p_paddr = suggested_lma;
5628 /* Offset the segment physical address from the lma
5629 to allow for space taken up by elf headers. */
5630 if (map->includes_filehdr)
5632 if (map->p_paddr >= iehdr->e_ehsize)
5633 map->p_paddr -= iehdr->e_ehsize;
5636 map->includes_filehdr = FALSE;
5637 map->includes_phdrs = FALSE;
5641 if (map->includes_phdrs)
5643 if (map->p_paddr >= iehdr->e_phnum * iehdr->e_phentsize)
5645 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5647 /* iehdr->e_phnum is just an estimate of the number
5648 of program headers that we will need. Make a note
5649 here of the number we used and the segment we chose
5650 to hold these headers, so that we can adjust the
5651 offset when we know the correct value. */
5652 phdr_adjust_num = iehdr->e_phnum;
5653 phdr_adjust_seg = map;
5656 map->includes_phdrs = FALSE;
5660 /* Step Three: Loop over the sections again, this time assigning
5661 those that fit to the current segment and removing them from the
5662 sections array; but making sure not to leave large gaps. Once all
5663 possible sections have been assigned to the current segment it is
5664 added to the list of built segments and if sections still remain
5665 to be assigned, a new segment is constructed before repeating
5672 first_suggested_lma = TRUE;
5674 /* Fill the current segment with sections that fit. */
5675 for (j = 0; j < section_count; j++)
5677 section = sections[j];
5679 if (section == NULL)
5682 output_section = section->output_section;
5684 BFD_ASSERT (output_section != NULL);
5686 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5687 || IS_COREFILE_NOTE (segment, section))
5689 if (map->count == 0)
5691 /* If the first section in a segment does not start at
5692 the beginning of the segment, then something is
5694 if (output_section->lma
5696 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5697 + (map->includes_phdrs
5698 ? iehdr->e_phnum * iehdr->e_phentsize
5706 prev_sec = map->sections[map->count - 1];
5708 /* If the gap between the end of the previous section
5709 and the start of this section is more than
5710 maxpagesize then we need to start a new segment. */
5711 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
5713 < BFD_ALIGN (output_section->lma, maxpagesize))
5714 || (prev_sec->lma + prev_sec->size
5715 > output_section->lma))
5717 if (first_suggested_lma)
5719 suggested_lma = output_section->lma;
5720 first_suggested_lma = FALSE;
5727 map->sections[map->count++] = output_section;
5730 section->segment_mark = TRUE;
5732 else if (first_suggested_lma)
5734 suggested_lma = output_section->lma;
5735 first_suggested_lma = FALSE;
5739 BFD_ASSERT (map->count > 0);
5741 /* Add the current segment to the list of built segments. */
5742 *pointer_to_map = map;
5743 pointer_to_map = &map->next;
5745 if (isec < section_count)
5747 /* We still have not allocated all of the sections to
5748 segments. Create a new segment here, initialise it
5749 and carry on looping. */
5750 amt = sizeof (struct elf_segment_map);
5751 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5752 map = (struct elf_segment_map *) bfd_alloc (obfd, amt);
5759 /* Initialise the fields of the segment map. Set the physical
5760 physical address to the LMA of the first section that has
5761 not yet been assigned. */
5763 map->p_type = segment->p_type;
5764 map->p_flags = segment->p_flags;
5765 map->p_flags_valid = 1;
5766 map->p_paddr = suggested_lma;
5767 map->p_paddr_valid = p_paddr_valid;
5768 map->includes_filehdr = 0;
5769 map->includes_phdrs = 0;
5772 while (isec < section_count);
5777 elf_tdata (obfd)->segment_map = map_first;
5779 /* If we had to estimate the number of program headers that were
5780 going to be needed, then check our estimate now and adjust
5781 the offset if necessary. */
5782 if (phdr_adjust_seg != NULL)
5786 for (count = 0, map = map_first; map != NULL; map = map->next)
5789 if (count > phdr_adjust_num)
5790 phdr_adjust_seg->p_paddr
5791 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5796 #undef IS_CONTAINED_BY_VMA
5797 #undef IS_CONTAINED_BY_LMA
5799 #undef IS_COREFILE_NOTE
5800 #undef IS_SOLARIS_PT_INTERP
5801 #undef IS_SECTION_IN_INPUT_SEGMENT
5802 #undef INCLUDE_SECTION_IN_SEGMENT
5803 #undef SEGMENT_AFTER_SEGMENT
5804 #undef SEGMENT_OVERLAPS
5808 /* Copy ELF program header information. */
5811 copy_elf_program_header (bfd *ibfd, bfd *obfd)
5813 Elf_Internal_Ehdr *iehdr;
5814 struct elf_segment_map *map;
5815 struct elf_segment_map *map_first;
5816 struct elf_segment_map **pointer_to_map;
5817 Elf_Internal_Phdr *segment;
5819 unsigned int num_segments;
5820 bfd_boolean phdr_included = FALSE;
5821 bfd_boolean p_paddr_valid;
5823 iehdr = elf_elfheader (ibfd);
5826 pointer_to_map = &map_first;
5828 /* If all the segment p_paddr fields are zero, don't set
5829 map->p_paddr_valid. */
5830 p_paddr_valid = FALSE;
5831 num_segments = elf_elfheader (ibfd)->e_phnum;
5832 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5835 if (segment->p_paddr != 0)
5837 p_paddr_valid = TRUE;
5841 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5846 unsigned int section_count;
5848 Elf_Internal_Shdr *this_hdr;
5849 asection *first_section = NULL;
5850 asection *lowest_section = NULL;
5852 /* Compute how many sections are in this segment. */
5853 for (section = ibfd->sections, section_count = 0;
5855 section = section->next)
5857 this_hdr = &(elf_section_data(section)->this_hdr);
5858 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5861 first_section = lowest_section = section;
5862 if (section->lma < lowest_section->lma)
5863 lowest_section = section;
5868 /* Allocate a segment map big enough to contain
5869 all of the sections we have selected. */
5870 amt = sizeof (struct elf_segment_map);
5871 if (section_count != 0)
5872 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5873 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
5877 /* Initialize the fields of the output segment map with the
5880 map->p_type = segment->p_type;
5881 map->p_flags = segment->p_flags;
5882 map->p_flags_valid = 1;
5883 map->p_paddr = segment->p_paddr;
5884 map->p_paddr_valid = p_paddr_valid;
5885 map->p_align = segment->p_align;
5886 map->p_align_valid = 1;
5887 map->p_vaddr_offset = 0;
5889 if (map->p_type == PT_GNU_RELRO)
5891 /* The PT_GNU_RELRO segment may contain the first a few
5892 bytes in the .got.plt section even if the whole .got.plt
5893 section isn't in the PT_GNU_RELRO segment. We won't
5894 change the size of the PT_GNU_RELRO segment. */
5895 map->p_size = segment->p_memsz;
5896 map->p_size_valid = 1;
5899 /* Determine if this segment contains the ELF file header
5900 and if it contains the program headers themselves. */
5901 map->includes_filehdr = (segment->p_offset == 0
5902 && segment->p_filesz >= iehdr->e_ehsize);
5904 map->includes_phdrs = 0;
5905 if (! phdr_included || segment->p_type != PT_LOAD)
5907 map->includes_phdrs =
5908 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5909 && (segment->p_offset + segment->p_filesz
5910 >= ((bfd_vma) iehdr->e_phoff
5911 + iehdr->e_phnum * iehdr->e_phentsize)));
5913 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5914 phdr_included = TRUE;
5917 if (map->includes_filehdr && first_section)
5918 /* We need to keep the space used by the headers fixed. */
5919 map->header_size = first_section->vma - segment->p_vaddr;
5921 if (!map->includes_phdrs
5922 && !map->includes_filehdr
5923 && map->p_paddr_valid)
5924 /* There is some other padding before the first section. */
5925 map->p_vaddr_offset = ((lowest_section ? lowest_section->lma : 0)
5926 - segment->p_paddr);
5928 if (section_count != 0)
5930 unsigned int isec = 0;
5932 for (section = first_section;
5934 section = section->next)
5936 this_hdr = &(elf_section_data(section)->this_hdr);
5937 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5939 map->sections[isec++] = section->output_section;
5940 if (isec == section_count)
5946 map->count = section_count;
5947 *pointer_to_map = map;
5948 pointer_to_map = &map->next;
5951 elf_tdata (obfd)->segment_map = map_first;
5955 /* Copy private BFD data. This copies or rewrites ELF program header
5959 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
5961 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5962 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5965 if (elf_tdata (ibfd)->phdr == NULL)
5968 if (ibfd->xvec == obfd->xvec)
5970 /* Check to see if any sections in the input BFD
5971 covered by ELF program header have changed. */
5972 Elf_Internal_Phdr *segment;
5973 asection *section, *osec;
5974 unsigned int i, num_segments;
5975 Elf_Internal_Shdr *this_hdr;
5976 const struct elf_backend_data *bed;
5978 bed = get_elf_backend_data (ibfd);
5980 /* Regenerate the segment map if p_paddr is set to 0. */
5981 if (bed->want_p_paddr_set_to_zero)
5984 /* Initialize the segment mark field. */
5985 for (section = obfd->sections; section != NULL;
5986 section = section->next)
5987 section->segment_mark = FALSE;
5989 num_segments = elf_elfheader (ibfd)->e_phnum;
5990 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5994 /* PR binutils/3535. The Solaris linker always sets the p_paddr
5995 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
5996 which severly confuses things, so always regenerate the segment
5997 map in this case. */
5998 if (segment->p_paddr == 0
5999 && segment->p_memsz == 0
6000 && (segment->p_type == PT_INTERP || segment->p_type == PT_DYNAMIC))
6003 for (section = ibfd->sections;
6004 section != NULL; section = section->next)
6006 /* We mark the output section so that we know it comes
6007 from the input BFD. */
6008 osec = section->output_section;
6010 osec->segment_mark = TRUE;
6012 /* Check if this section is covered by the segment. */
6013 this_hdr = &(elf_section_data(section)->this_hdr);
6014 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
6016 /* FIXME: Check if its output section is changed or
6017 removed. What else do we need to check? */
6019 || section->flags != osec->flags
6020 || section->lma != osec->lma
6021 || section->vma != osec->vma
6022 || section->size != osec->size
6023 || section->rawsize != osec->rawsize
6024 || section->alignment_power != osec->alignment_power)
6030 /* Check to see if any output section do not come from the
6032 for (section = obfd->sections; section != NULL;
6033 section = section->next)
6035 if (section->segment_mark == FALSE)
6038 section->segment_mark = FALSE;
6041 return copy_elf_program_header (ibfd, obfd);
6045 return rewrite_elf_program_header (ibfd, obfd);
6048 /* Initialize private output section information from input section. */
6051 _bfd_elf_init_private_section_data (bfd *ibfd,
6055 struct bfd_link_info *link_info)
6058 Elf_Internal_Shdr *ihdr, *ohdr;
6059 bfd_boolean need_group = link_info == NULL || link_info->relocatable;
6061 if (ibfd->xvec->flavour != bfd_target_elf_flavour
6062 || obfd->xvec->flavour != bfd_target_elf_flavour)
6065 /* Don't copy the output ELF section type from input if the
6066 output BFD section flags have been set to something different.
6067 elf_fake_sections will set ELF section type based on BFD
6069 if (elf_section_type (osec) == SHT_NULL
6070 && (osec->flags == isec->flags || !osec->flags))
6071 elf_section_type (osec) = elf_section_type (isec);
6073 /* FIXME: Is this correct for all OS/PROC specific flags? */
6074 elf_section_flags (osec) |= (elf_section_flags (isec)
6075 & (SHF_MASKOS | SHF_MASKPROC));
6077 /* Set things up for objcopy and relocatable link. The output
6078 SHT_GROUP section will have its elf_next_in_group pointing back
6079 to the input group members. Ignore linker created group section.
6080 See elfNN_ia64_object_p in elfxx-ia64.c. */
6083 if (elf_sec_group (isec) == NULL
6084 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)
6086 if (elf_section_flags (isec) & SHF_GROUP)
6087 elf_section_flags (osec) |= SHF_GROUP;
6088 elf_next_in_group (osec) = elf_next_in_group (isec);
6089 elf_section_data (osec)->group = elf_section_data (isec)->group;
6093 ihdr = &elf_section_data (isec)->this_hdr;
6095 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
6096 don't use the output section of the linked-to section since it
6097 may be NULL at this point. */
6098 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
6100 ohdr = &elf_section_data (osec)->this_hdr;
6101 ohdr->sh_flags |= SHF_LINK_ORDER;
6102 elf_linked_to_section (osec) = elf_linked_to_section (isec);
6105 osec->use_rela_p = isec->use_rela_p;
6110 /* Copy private section information. This copies over the entsize
6111 field, and sometimes the info field. */
6114 _bfd_elf_copy_private_section_data (bfd *ibfd,
6119 Elf_Internal_Shdr *ihdr, *ohdr;
6121 if (ibfd->xvec->flavour != bfd_target_elf_flavour
6122 || obfd->xvec->flavour != bfd_target_elf_flavour)
6125 ihdr = &elf_section_data (isec)->this_hdr;
6126 ohdr = &elf_section_data (osec)->this_hdr;
6128 ohdr->sh_entsize = ihdr->sh_entsize;
6130 if (ihdr->sh_type == SHT_SYMTAB
6131 || ihdr->sh_type == SHT_DYNSYM
6132 || ihdr->sh_type == SHT_GNU_verneed
6133 || ihdr->sh_type == SHT_GNU_verdef)
6134 ohdr->sh_info = ihdr->sh_info;
6136 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
6140 /* Copy private header information. */
6143 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
6147 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6148 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6151 /* Copy over private BFD data if it has not already been copied.
6152 This must be done here, rather than in the copy_private_bfd_data
6153 entry point, because the latter is called after the section
6154 contents have been set, which means that the program headers have
6155 already been worked out. */
6156 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
6158 if (! copy_private_bfd_data (ibfd, obfd))
6162 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
6163 if (elf_section_type (isec) == SHT_GROUP)
6165 asection *first = elf_next_in_group (isec);
6166 asection *s = first;
6169 /* If this member section is being output but the
6170 SHT_GROUP section is not, then clear the group info
6171 set up by _bfd_elf_copy_private_section_data. */
6172 if (s->output_section != NULL
6173 && isec->output_section == NULL)
6175 elf_section_flags (s->output_section) &= ~SHF_GROUP;
6176 elf_group_name (s->output_section) = NULL;
6178 /* Conversely, if the member section is not being output
6179 but the SHT_GROUP section is, then adjust its size. */
6180 else if (s->output_section == NULL
6181 && isec->output_section != NULL)
6182 isec->output_section->size -= 4;
6183 s = elf_next_in_group (s);
6192 /* Copy private symbol information. If this symbol is in a section
6193 which we did not map into a BFD section, try to map the section
6194 index correctly. We use special macro definitions for the mapped
6195 section indices; these definitions are interpreted by the
6196 swap_out_syms function. */
6198 #define MAP_ONESYMTAB (SHN_HIOS + 1)
6199 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
6200 #define MAP_STRTAB (SHN_HIOS + 3)
6201 #define MAP_SHSTRTAB (SHN_HIOS + 4)
6202 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
6205 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
6210 elf_symbol_type *isym, *osym;
6212 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6213 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6216 isym = elf_symbol_from (ibfd, isymarg);
6217 osym = elf_symbol_from (obfd, osymarg);
6220 && isym->internal_elf_sym.st_shndx != 0
6222 && bfd_is_abs_section (isym->symbol.section))
6226 shndx = isym->internal_elf_sym.st_shndx;
6227 if (shndx == elf_onesymtab (ibfd))
6228 shndx = MAP_ONESYMTAB;
6229 else if (shndx == elf_dynsymtab (ibfd))
6230 shndx = MAP_DYNSYMTAB;
6231 else if (shndx == elf_tdata (ibfd)->strtab_section)
6233 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
6234 shndx = MAP_SHSTRTAB;
6235 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
6236 shndx = MAP_SYM_SHNDX;
6237 osym->internal_elf_sym.st_shndx = shndx;
6243 /* Swap out the symbols. */
6246 swap_out_syms (bfd *abfd,
6247 struct bfd_strtab_hash **sttp,
6250 const struct elf_backend_data *bed;
6253 struct bfd_strtab_hash *stt;
6254 Elf_Internal_Shdr *symtab_hdr;
6255 Elf_Internal_Shdr *symtab_shndx_hdr;
6256 Elf_Internal_Shdr *symstrtab_hdr;
6257 bfd_byte *outbound_syms;
6258 bfd_byte *outbound_shndx;
6261 bfd_boolean name_local_sections;
6263 if (!elf_map_symbols (abfd))
6266 /* Dump out the symtabs. */
6267 stt = _bfd_elf_stringtab_init ();
6271 bed = get_elf_backend_data (abfd);
6272 symcount = bfd_get_symcount (abfd);
6273 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
6274 symtab_hdr->sh_type = SHT_SYMTAB;
6275 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
6276 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
6277 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
6278 symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
6280 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
6281 symstrtab_hdr->sh_type = SHT_STRTAB;
6283 outbound_syms = (bfd_byte *) bfd_alloc2 (abfd, 1 + symcount,
6284 bed->s->sizeof_sym);
6285 if (outbound_syms == NULL)
6287 _bfd_stringtab_free (stt);
6290 symtab_hdr->contents = outbound_syms;
6292 outbound_shndx = NULL;
6293 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
6294 if (symtab_shndx_hdr->sh_name != 0)
6296 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
6297 outbound_shndx = (bfd_byte *)
6298 bfd_zalloc2 (abfd, 1 + symcount, sizeof (Elf_External_Sym_Shndx));
6299 if (outbound_shndx == NULL)
6301 _bfd_stringtab_free (stt);
6305 symtab_shndx_hdr->contents = outbound_shndx;
6306 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
6307 symtab_shndx_hdr->sh_size = amt;
6308 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
6309 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
6312 /* Now generate the data (for "contents"). */
6314 /* Fill in zeroth symbol and swap it out. */
6315 Elf_Internal_Sym sym;
6321 sym.st_shndx = SHN_UNDEF;
6322 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6323 outbound_syms += bed->s->sizeof_sym;
6324 if (outbound_shndx != NULL)
6325 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6329 = (bed->elf_backend_name_local_section_symbols
6330 && bed->elf_backend_name_local_section_symbols (abfd));
6332 syms = bfd_get_outsymbols (abfd);
6333 for (idx = 0; idx < symcount; idx++)
6335 Elf_Internal_Sym sym;
6336 bfd_vma value = syms[idx]->value;
6337 elf_symbol_type *type_ptr;
6338 flagword flags = syms[idx]->flags;
6341 if (!name_local_sections
6342 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
6344 /* Local section symbols have no name. */
6349 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
6352 if (sym.st_name == (unsigned long) -1)
6354 _bfd_stringtab_free (stt);
6359 type_ptr = elf_symbol_from (abfd, syms[idx]);
6361 if ((flags & BSF_SECTION_SYM) == 0
6362 && bfd_is_com_section (syms[idx]->section))
6364 /* ELF common symbols put the alignment into the `value' field,
6365 and the size into the `size' field. This is backwards from
6366 how BFD handles it, so reverse it here. */
6367 sym.st_size = value;
6368 if (type_ptr == NULL
6369 || type_ptr->internal_elf_sym.st_value == 0)
6370 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
6372 sym.st_value = type_ptr->internal_elf_sym.st_value;
6373 sym.st_shndx = _bfd_elf_section_from_bfd_section
6374 (abfd, syms[idx]->section);
6378 asection *sec = syms[idx]->section;
6381 if (sec->output_section)
6383 value += sec->output_offset;
6384 sec = sec->output_section;
6387 /* Don't add in the section vma for relocatable output. */
6388 if (! relocatable_p)
6390 sym.st_value = value;
6391 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
6393 if (bfd_is_abs_section (sec)
6395 && type_ptr->internal_elf_sym.st_shndx != 0)
6397 /* This symbol is in a real ELF section which we did
6398 not create as a BFD section. Undo the mapping done
6399 by copy_private_symbol_data. */
6400 shndx = type_ptr->internal_elf_sym.st_shndx;
6404 shndx = elf_onesymtab (abfd);
6407 shndx = elf_dynsymtab (abfd);
6410 shndx = elf_tdata (abfd)->strtab_section;
6413 shndx = elf_tdata (abfd)->shstrtab_section;
6416 shndx = elf_tdata (abfd)->symtab_shndx_section;
6424 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
6426 if (shndx == SHN_BAD)
6430 /* Writing this would be a hell of a lot easier if
6431 we had some decent documentation on bfd, and
6432 knew what to expect of the library, and what to
6433 demand of applications. For example, it
6434 appears that `objcopy' might not set the
6435 section of a symbol to be a section that is
6436 actually in the output file. */
6437 sec2 = bfd_get_section_by_name (abfd, sec->name);
6440 _bfd_error_handler (_("\
6441 Unable to find equivalent output section for symbol '%s' from section '%s'"),
6442 syms[idx]->name ? syms[idx]->name : "<Local sym>",
6444 bfd_set_error (bfd_error_invalid_operation);
6445 _bfd_stringtab_free (stt);
6449 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
6450 BFD_ASSERT (shndx != SHN_BAD);
6454 sym.st_shndx = shndx;
6457 if ((flags & BSF_THREAD_LOCAL) != 0)
6459 else if ((flags & BSF_GNU_INDIRECT_FUNCTION) != 0)
6460 type = STT_GNU_IFUNC;
6461 else if ((flags & BSF_FUNCTION) != 0)
6463 else if ((flags & BSF_OBJECT) != 0)
6465 else if ((flags & BSF_RELC) != 0)
6467 else if ((flags & BSF_SRELC) != 0)
6472 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
6475 /* Processor-specific types. */
6476 if (type_ptr != NULL
6477 && bed->elf_backend_get_symbol_type)
6478 type = ((*bed->elf_backend_get_symbol_type)
6479 (&type_ptr->internal_elf_sym, type));
6481 if (flags & BSF_SECTION_SYM)
6483 if (flags & BSF_GLOBAL)
6484 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
6486 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
6488 else if (bfd_is_com_section (syms[idx]->section))
6490 #ifdef USE_STT_COMMON
6491 if (type == STT_OBJECT)
6492 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_COMMON);
6495 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
6497 else if (bfd_is_und_section (syms[idx]->section))
6498 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
6502 else if (flags & BSF_FILE)
6503 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
6506 int bind = STB_LOCAL;
6508 if (flags & BSF_LOCAL)
6510 else if (flags & BSF_GNU_UNIQUE)
6511 bind = STB_GNU_UNIQUE;
6512 else if (flags & BSF_WEAK)
6514 else if (flags & BSF_GLOBAL)
6517 sym.st_info = ELF_ST_INFO (bind, type);
6520 if (type_ptr != NULL)
6521 sym.st_other = type_ptr->internal_elf_sym.st_other;
6525 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6526 outbound_syms += bed->s->sizeof_sym;
6527 if (outbound_shndx != NULL)
6528 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6532 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
6533 symstrtab_hdr->sh_type = SHT_STRTAB;
6535 symstrtab_hdr->sh_flags = 0;
6536 symstrtab_hdr->sh_addr = 0;
6537 symstrtab_hdr->sh_entsize = 0;
6538 symstrtab_hdr->sh_link = 0;
6539 symstrtab_hdr->sh_info = 0;
6540 symstrtab_hdr->sh_addralign = 1;
6545 /* Return the number of bytes required to hold the symtab vector.
6547 Note that we base it on the count plus 1, since we will null terminate
6548 the vector allocated based on this size. However, the ELF symbol table
6549 always has a dummy entry as symbol #0, so it ends up even. */
6552 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
6556 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
6558 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6559 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6561 symtab_size -= sizeof (asymbol *);
6567 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
6571 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
6573 if (elf_dynsymtab (abfd) == 0)
6575 bfd_set_error (bfd_error_invalid_operation);
6579 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6580 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6582 symtab_size -= sizeof (asymbol *);
6588 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
6591 return (asect->reloc_count + 1) * sizeof (arelent *);
6594 /* Canonicalize the relocs. */
6597 _bfd_elf_canonicalize_reloc (bfd *abfd,
6604 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6606 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
6609 tblptr = section->relocation;
6610 for (i = 0; i < section->reloc_count; i++)
6611 *relptr++ = tblptr++;
6615 return section->reloc_count;
6619 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
6621 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6622 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
6625 bfd_get_symcount (abfd) = symcount;
6630 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
6631 asymbol **allocation)
6633 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6634 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
6637 bfd_get_dynamic_symcount (abfd) = symcount;
6641 /* Return the size required for the dynamic reloc entries. Any loadable
6642 section that was actually installed in the BFD, and has type SHT_REL
6643 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6644 dynamic reloc section. */
6647 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
6652 if (elf_dynsymtab (abfd) == 0)
6654 bfd_set_error (bfd_error_invalid_operation);
6658 ret = sizeof (arelent *);
6659 for (s = abfd->sections; s != NULL; s = s->next)
6660 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6661 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6662 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6663 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
6664 * sizeof (arelent *));
6669 /* Canonicalize the dynamic relocation entries. Note that we return the
6670 dynamic relocations as a single block, although they are actually
6671 associated with particular sections; the interface, which was
6672 designed for SunOS style shared libraries, expects that there is only
6673 one set of dynamic relocs. Any loadable section that was actually
6674 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6675 dynamic symbol table, is considered to be a dynamic reloc section. */
6678 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
6682 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6686 if (elf_dynsymtab (abfd) == 0)
6688 bfd_set_error (bfd_error_invalid_operation);
6692 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6694 for (s = abfd->sections; s != NULL; s = s->next)
6696 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6697 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6698 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6703 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
6705 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
6707 for (i = 0; i < count; i++)
6718 /* Read in the version information. */
6721 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
6723 bfd_byte *contents = NULL;
6724 unsigned int freeidx = 0;
6726 if (elf_dynverref (abfd) != 0)
6728 Elf_Internal_Shdr *hdr;
6729 Elf_External_Verneed *everneed;
6730 Elf_Internal_Verneed *iverneed;
6732 bfd_byte *contents_end;
6734 hdr = &elf_tdata (abfd)->dynverref_hdr;
6736 elf_tdata (abfd)->verref = (Elf_Internal_Verneed *)
6737 bfd_zalloc2 (abfd, hdr->sh_info, sizeof (Elf_Internal_Verneed));
6738 if (elf_tdata (abfd)->verref == NULL)
6741 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6743 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
6744 if (contents == NULL)
6746 error_return_verref:
6747 elf_tdata (abfd)->verref = NULL;
6748 elf_tdata (abfd)->cverrefs = 0;
6751 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6752 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6753 goto error_return_verref;
6755 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verneed))
6756 goto error_return_verref;
6758 BFD_ASSERT (sizeof (Elf_External_Verneed)
6759 == sizeof (Elf_External_Vernaux));
6760 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
6761 everneed = (Elf_External_Verneed *) contents;
6762 iverneed = elf_tdata (abfd)->verref;
6763 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6765 Elf_External_Vernaux *evernaux;
6766 Elf_Internal_Vernaux *ivernaux;
6769 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
6771 iverneed->vn_bfd = abfd;
6773 iverneed->vn_filename =
6774 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6776 if (iverneed->vn_filename == NULL)
6777 goto error_return_verref;
6779 if (iverneed->vn_cnt == 0)
6780 iverneed->vn_auxptr = NULL;
6783 iverneed->vn_auxptr = (struct elf_internal_vernaux *)
6784 bfd_alloc2 (abfd, iverneed->vn_cnt,
6785 sizeof (Elf_Internal_Vernaux));
6786 if (iverneed->vn_auxptr == NULL)
6787 goto error_return_verref;
6790 if (iverneed->vn_aux
6791 > (size_t) (contents_end - (bfd_byte *) everneed))
6792 goto error_return_verref;
6794 evernaux = ((Elf_External_Vernaux *)
6795 ((bfd_byte *) everneed + iverneed->vn_aux));
6796 ivernaux = iverneed->vn_auxptr;
6797 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
6799 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
6801 ivernaux->vna_nodename =
6802 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6803 ivernaux->vna_name);
6804 if (ivernaux->vna_nodename == NULL)
6805 goto error_return_verref;
6807 if (j + 1 < iverneed->vn_cnt)
6808 ivernaux->vna_nextptr = ivernaux + 1;
6810 ivernaux->vna_nextptr = NULL;
6812 if (ivernaux->vna_next
6813 > (size_t) (contents_end - (bfd_byte *) evernaux))
6814 goto error_return_verref;
6816 evernaux = ((Elf_External_Vernaux *)
6817 ((bfd_byte *) evernaux + ivernaux->vna_next));
6819 if (ivernaux->vna_other > freeidx)
6820 freeidx = ivernaux->vna_other;
6823 if (i + 1 < hdr->sh_info)
6824 iverneed->vn_nextref = iverneed + 1;
6826 iverneed->vn_nextref = NULL;
6828 if (iverneed->vn_next
6829 > (size_t) (contents_end - (bfd_byte *) everneed))
6830 goto error_return_verref;
6832 everneed = ((Elf_External_Verneed *)
6833 ((bfd_byte *) everneed + iverneed->vn_next));
6840 if (elf_dynverdef (abfd) != 0)
6842 Elf_Internal_Shdr *hdr;
6843 Elf_External_Verdef *everdef;
6844 Elf_Internal_Verdef *iverdef;
6845 Elf_Internal_Verdef *iverdefarr;
6846 Elf_Internal_Verdef iverdefmem;
6848 unsigned int maxidx;
6849 bfd_byte *contents_end_def, *contents_end_aux;
6851 hdr = &elf_tdata (abfd)->dynverdef_hdr;
6853 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
6854 if (contents == NULL)
6856 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6857 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6860 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verdef))
6863 BFD_ASSERT (sizeof (Elf_External_Verdef)
6864 >= sizeof (Elf_External_Verdaux));
6865 contents_end_def = contents + hdr->sh_size
6866 - sizeof (Elf_External_Verdef);
6867 contents_end_aux = contents + hdr->sh_size
6868 - sizeof (Elf_External_Verdaux);
6870 /* We know the number of entries in the section but not the maximum
6871 index. Therefore we have to run through all entries and find
6873 everdef = (Elf_External_Verdef *) contents;
6875 for (i = 0; i < hdr->sh_info; ++i)
6877 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6879 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
6880 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
6882 if (iverdefmem.vd_next
6883 > (size_t) (contents_end_def - (bfd_byte *) everdef))
6886 everdef = ((Elf_External_Verdef *)
6887 ((bfd_byte *) everdef + iverdefmem.vd_next));
6890 if (default_imported_symver)
6892 if (freeidx > maxidx)
6897 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
6898 bfd_zalloc2 (abfd, maxidx, sizeof (Elf_Internal_Verdef));
6899 if (elf_tdata (abfd)->verdef == NULL)
6902 elf_tdata (abfd)->cverdefs = maxidx;
6904 everdef = (Elf_External_Verdef *) contents;
6905 iverdefarr = elf_tdata (abfd)->verdef;
6906 for (i = 0; i < hdr->sh_info; i++)
6908 Elf_External_Verdaux *everdaux;
6909 Elf_Internal_Verdaux *iverdaux;
6912 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6914 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
6916 error_return_verdef:
6917 elf_tdata (abfd)->verdef = NULL;
6918 elf_tdata (abfd)->cverdefs = 0;
6922 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
6923 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
6925 iverdef->vd_bfd = abfd;
6927 if (iverdef->vd_cnt == 0)
6928 iverdef->vd_auxptr = NULL;
6931 iverdef->vd_auxptr = (struct elf_internal_verdaux *)
6932 bfd_alloc2 (abfd, iverdef->vd_cnt,
6933 sizeof (Elf_Internal_Verdaux));
6934 if (iverdef->vd_auxptr == NULL)
6935 goto error_return_verdef;
6939 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
6940 goto error_return_verdef;
6942 everdaux = ((Elf_External_Verdaux *)
6943 ((bfd_byte *) everdef + iverdef->vd_aux));
6944 iverdaux = iverdef->vd_auxptr;
6945 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
6947 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
6949 iverdaux->vda_nodename =
6950 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6951 iverdaux->vda_name);
6952 if (iverdaux->vda_nodename == NULL)
6953 goto error_return_verdef;
6955 if (j + 1 < iverdef->vd_cnt)
6956 iverdaux->vda_nextptr = iverdaux + 1;
6958 iverdaux->vda_nextptr = NULL;
6960 if (iverdaux->vda_next
6961 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
6962 goto error_return_verdef;
6964 everdaux = ((Elf_External_Verdaux *)
6965 ((bfd_byte *) everdaux + iverdaux->vda_next));
6968 if (iverdef->vd_cnt)
6969 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
6971 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
6972 iverdef->vd_nextdef = iverdef + 1;
6974 iverdef->vd_nextdef = NULL;
6976 everdef = ((Elf_External_Verdef *)
6977 ((bfd_byte *) everdef + iverdef->vd_next));
6983 else if (default_imported_symver)
6990 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
6991 bfd_zalloc2 (abfd, freeidx, sizeof (Elf_Internal_Verdef));
6992 if (elf_tdata (abfd)->verdef == NULL)
6995 elf_tdata (abfd)->cverdefs = freeidx;
6998 /* Create a default version based on the soname. */
6999 if (default_imported_symver)
7001 Elf_Internal_Verdef *iverdef;
7002 Elf_Internal_Verdaux *iverdaux;
7004 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];;
7006 iverdef->vd_version = VER_DEF_CURRENT;
7007 iverdef->vd_flags = 0;
7008 iverdef->vd_ndx = freeidx;
7009 iverdef->vd_cnt = 1;
7011 iverdef->vd_bfd = abfd;
7013 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
7014 if (iverdef->vd_nodename == NULL)
7015 goto error_return_verdef;
7016 iverdef->vd_nextdef = NULL;
7017 iverdef->vd_auxptr = (struct elf_internal_verdaux *)
7018 bfd_alloc (abfd, sizeof (Elf_Internal_Verdaux));
7019 if (iverdef->vd_auxptr == NULL)
7020 goto error_return_verdef;
7022 iverdaux = iverdef->vd_auxptr;
7023 iverdaux->vda_nodename = iverdef->vd_nodename;
7024 iverdaux->vda_nextptr = NULL;
7030 if (contents != NULL)
7036 _bfd_elf_make_empty_symbol (bfd *abfd)
7038 elf_symbol_type *newsym;
7039 bfd_size_type amt = sizeof (elf_symbol_type);
7041 newsym = (elf_symbol_type *) bfd_zalloc (abfd, amt);
7046 newsym->symbol.the_bfd = abfd;
7047 return &newsym->symbol;
7052 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
7056 bfd_symbol_info (symbol, ret);
7059 /* Return whether a symbol name implies a local symbol. Most targets
7060 use this function for the is_local_label_name entry point, but some
7064 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
7067 /* Normal local symbols start with ``.L''. */
7068 if (name[0] == '.' && name[1] == 'L')
7071 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
7072 DWARF debugging symbols starting with ``..''. */
7073 if (name[0] == '.' && name[1] == '.')
7076 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
7077 emitting DWARF debugging output. I suspect this is actually a
7078 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
7079 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
7080 underscore to be emitted on some ELF targets). For ease of use,
7081 we treat such symbols as local. */
7082 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
7089 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
7090 asymbol *symbol ATTRIBUTE_UNUSED)
7097 _bfd_elf_set_arch_mach (bfd *abfd,
7098 enum bfd_architecture arch,
7099 unsigned long machine)
7101 /* If this isn't the right architecture for this backend, and this
7102 isn't the generic backend, fail. */
7103 if (arch != get_elf_backend_data (abfd)->arch
7104 && arch != bfd_arch_unknown
7105 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
7108 return bfd_default_set_arch_mach (abfd, arch, machine);
7111 /* Find the function to a particular section and offset,
7112 for error reporting. */
7115 elf_find_function (bfd *abfd,
7119 const char **filename_ptr,
7120 const char **functionname_ptr)
7122 const char *filename;
7123 asymbol *func, *file;
7126 /* ??? Given multiple file symbols, it is impossible to reliably
7127 choose the right file name for global symbols. File symbols are
7128 local symbols, and thus all file symbols must sort before any
7129 global symbols. The ELF spec may be interpreted to say that a
7130 file symbol must sort before other local symbols, but currently
7131 ld -r doesn't do this. So, for ld -r output, it is possible to
7132 make a better choice of file name for local symbols by ignoring
7133 file symbols appearing after a given local symbol. */
7134 enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
7135 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7141 state = nothing_seen;
7143 for (p = symbols; *p != NULL; p++)
7148 q = (elf_symbol_type *) *p;
7150 type = ELF_ST_TYPE (q->internal_elf_sym.st_info);
7155 if (state == symbol_seen)
7156 state = file_after_symbol_seen;
7159 if (!bed->is_function_type (type))
7162 if (bfd_get_section (&q->symbol) == section
7163 && q->symbol.value >= low_func
7164 && q->symbol.value <= offset)
7166 func = (asymbol *) q;
7167 low_func = q->symbol.value;
7170 && (ELF_ST_BIND (q->internal_elf_sym.st_info) == STB_LOCAL
7171 || state != file_after_symbol_seen))
7172 filename = bfd_asymbol_name (file);
7176 if (state == nothing_seen)
7177 state = symbol_seen;
7184 *filename_ptr = filename;
7185 if (functionname_ptr)
7186 *functionname_ptr = bfd_asymbol_name (func);
7191 /* Find the nearest line to a particular section and offset,
7192 for error reporting. */
7195 _bfd_elf_find_nearest_line (bfd *abfd,
7199 const char **filename_ptr,
7200 const char **functionname_ptr,
7201 unsigned int *line_ptr)
7205 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
7206 filename_ptr, functionname_ptr,
7209 if (!*functionname_ptr)
7210 elf_find_function (abfd, section, symbols, offset,
7211 *filename_ptr ? NULL : filename_ptr,
7217 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
7218 filename_ptr, functionname_ptr,
7220 &elf_tdata (abfd)->dwarf2_find_line_info))
7222 if (!*functionname_ptr)
7223 elf_find_function (abfd, section, symbols, offset,
7224 *filename_ptr ? NULL : filename_ptr,
7230 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
7231 &found, filename_ptr,
7232 functionname_ptr, line_ptr,
7233 &elf_tdata (abfd)->line_info))
7235 if (found && (*functionname_ptr || *line_ptr))
7238 if (symbols == NULL)
7241 if (! elf_find_function (abfd, section, symbols, offset,
7242 filename_ptr, functionname_ptr))
7249 /* Find the line for a symbol. */
7252 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
7253 const char **filename_ptr, unsigned int *line_ptr)
7255 return _bfd_dwarf2_find_line (abfd, symbols, symbol,
7256 filename_ptr, line_ptr, 0,
7257 &elf_tdata (abfd)->dwarf2_find_line_info);
7260 /* After a call to bfd_find_nearest_line, successive calls to
7261 bfd_find_inliner_info can be used to get source information about
7262 each level of function inlining that terminated at the address
7263 passed to bfd_find_nearest_line. Currently this is only supported
7264 for DWARF2 with appropriate DWARF3 extensions. */
7267 _bfd_elf_find_inliner_info (bfd *abfd,
7268 const char **filename_ptr,
7269 const char **functionname_ptr,
7270 unsigned int *line_ptr)
7273 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
7274 functionname_ptr, line_ptr,
7275 & elf_tdata (abfd)->dwarf2_find_line_info);
7280 _bfd_elf_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
7282 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7283 int ret = bed->s->sizeof_ehdr;
7285 if (!info->relocatable)
7287 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
7289 if (phdr_size == (bfd_size_type) -1)
7291 struct elf_segment_map *m;
7294 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
7295 phdr_size += bed->s->sizeof_phdr;
7298 phdr_size = get_program_header_size (abfd, info);
7301 elf_tdata (abfd)->program_header_size = phdr_size;
7309 _bfd_elf_set_section_contents (bfd *abfd,
7311 const void *location,
7313 bfd_size_type count)
7315 Elf_Internal_Shdr *hdr;
7318 if (! abfd->output_has_begun
7319 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
7322 hdr = &elf_section_data (section)->this_hdr;
7323 pos = hdr->sh_offset + offset;
7324 if (bfd_seek (abfd, pos, SEEK_SET) != 0
7325 || bfd_bwrite (location, count, abfd) != count)
7332 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
7333 arelent *cache_ptr ATTRIBUTE_UNUSED,
7334 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
7339 /* Try to convert a non-ELF reloc into an ELF one. */
7342 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
7344 /* Check whether we really have an ELF howto. */
7346 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
7348 bfd_reloc_code_real_type code;
7349 reloc_howto_type *howto;
7351 /* Alien reloc: Try to determine its type to replace it with an
7352 equivalent ELF reloc. */
7354 if (areloc->howto->pc_relative)
7356 switch (areloc->howto->bitsize)
7359 code = BFD_RELOC_8_PCREL;
7362 code = BFD_RELOC_12_PCREL;
7365 code = BFD_RELOC_16_PCREL;
7368 code = BFD_RELOC_24_PCREL;
7371 code = BFD_RELOC_32_PCREL;
7374 code = BFD_RELOC_64_PCREL;
7380 howto = bfd_reloc_type_lookup (abfd, code);
7382 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
7384 if (howto->pcrel_offset)
7385 areloc->addend += areloc->address;
7387 areloc->addend -= areloc->address; /* addend is unsigned!! */
7392 switch (areloc->howto->bitsize)
7398 code = BFD_RELOC_14;
7401 code = BFD_RELOC_16;
7404 code = BFD_RELOC_26;
7407 code = BFD_RELOC_32;
7410 code = BFD_RELOC_64;
7416 howto = bfd_reloc_type_lookup (abfd, code);
7420 areloc->howto = howto;
7428 (*_bfd_error_handler)
7429 (_("%B: unsupported relocation type %s"),
7430 abfd, areloc->howto->name);
7431 bfd_set_error (bfd_error_bad_value);
7436 _bfd_elf_close_and_cleanup (bfd *abfd)
7438 if (bfd_get_format (abfd) == bfd_object)
7440 if (elf_tdata (abfd) != NULL && elf_shstrtab (abfd) != NULL)
7441 _bfd_elf_strtab_free (elf_shstrtab (abfd));
7442 _bfd_dwarf2_cleanup_debug_info (abfd);
7445 return _bfd_generic_close_and_cleanup (abfd);
7448 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
7449 in the relocation's offset. Thus we cannot allow any sort of sanity
7450 range-checking to interfere. There is nothing else to do in processing
7453 bfd_reloc_status_type
7454 _bfd_elf_rel_vtable_reloc_fn
7455 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
7456 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
7457 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
7458 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
7460 return bfd_reloc_ok;
7463 /* Elf core file support. Much of this only works on native
7464 toolchains, since we rely on knowing the
7465 machine-dependent procfs structure in order to pick
7466 out details about the corefile. */
7468 #ifdef HAVE_SYS_PROCFS_H
7469 /* Needed for new procfs interface on sparc-solaris. */
7470 # define _STRUCTURED_PROC 1
7471 # include <sys/procfs.h>
7474 /* FIXME: this is kinda wrong, but it's what gdb wants. */
7477 elfcore_make_pid (bfd *abfd)
7479 return ((elf_tdata (abfd)->core_lwpid << 16)
7480 + (elf_tdata (abfd)->core_pid));
7483 /* If there isn't a section called NAME, make one, using
7484 data from SECT. Note, this function will generate a
7485 reference to NAME, so you shouldn't deallocate or
7489 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
7493 if (bfd_get_section_by_name (abfd, name) != NULL)
7496 sect2 = bfd_make_section_with_flags (abfd, name, sect->flags);
7500 sect2->size = sect->size;
7501 sect2->filepos = sect->filepos;
7502 sect2->alignment_power = sect->alignment_power;
7506 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
7507 actually creates up to two pseudosections:
7508 - For the single-threaded case, a section named NAME, unless
7509 such a section already exists.
7510 - For the multi-threaded case, a section named "NAME/PID", where
7511 PID is elfcore_make_pid (abfd).
7512 Both pseudosections have identical contents. */
7514 _bfd_elfcore_make_pseudosection (bfd *abfd,
7520 char *threaded_name;
7524 /* Build the section name. */
7526 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
7527 len = strlen (buf) + 1;
7528 threaded_name = (char *) bfd_alloc (abfd, len);
7529 if (threaded_name == NULL)
7531 memcpy (threaded_name, buf, len);
7533 sect = bfd_make_section_anyway_with_flags (abfd, threaded_name,
7538 sect->filepos = filepos;
7539 sect->alignment_power = 2;
7541 return elfcore_maybe_make_sect (abfd, name, sect);
7544 /* prstatus_t exists on:
7546 linux 2.[01] + glibc
7550 #if defined (HAVE_PRSTATUS_T)
7553 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
7558 if (note->descsz == sizeof (prstatus_t))
7562 size = sizeof (prstat.pr_reg);
7563 offset = offsetof (prstatus_t, pr_reg);
7564 memcpy (&prstat, note->descdata, sizeof (prstat));
7566 /* Do not overwrite the core signal if it
7567 has already been set by another thread. */
7568 if (elf_tdata (abfd)->core_signal == 0)
7569 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7570 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7572 /* pr_who exists on:
7575 pr_who doesn't exist on:
7578 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7579 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7582 #if defined (HAVE_PRSTATUS32_T)
7583 else if (note->descsz == sizeof (prstatus32_t))
7585 /* 64-bit host, 32-bit corefile */
7586 prstatus32_t prstat;
7588 size = sizeof (prstat.pr_reg);
7589 offset = offsetof (prstatus32_t, pr_reg);
7590 memcpy (&prstat, note->descdata, sizeof (prstat));
7592 /* Do not overwrite the core signal if it
7593 has already been set by another thread. */
7594 if (elf_tdata (abfd)->core_signal == 0)
7595 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7596 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7598 /* pr_who exists on:
7601 pr_who doesn't exist on:
7604 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7605 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7608 #endif /* HAVE_PRSTATUS32_T */
7611 /* Fail - we don't know how to handle any other
7612 note size (ie. data object type). */
7616 /* Make a ".reg/999" section and a ".reg" section. */
7617 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
7618 size, note->descpos + offset);
7620 #endif /* defined (HAVE_PRSTATUS_T) */
7622 /* Create a pseudosection containing the exact contents of NOTE. */
7624 elfcore_make_note_pseudosection (bfd *abfd,
7626 Elf_Internal_Note *note)
7628 return _bfd_elfcore_make_pseudosection (abfd, name,
7629 note->descsz, note->descpos);
7632 /* There isn't a consistent prfpregset_t across platforms,
7633 but it doesn't matter, because we don't have to pick this
7634 data structure apart. */
7637 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
7639 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7642 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7643 type of NT_PRXFPREG. Just include the whole note's contents
7647 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
7649 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
7652 /* Linux dumps the Intel XSAVE extended state in a note named "LINUX"
7653 with a note type of NT_X86_XSTATE. Just include the whole note's
7654 contents literally. */
7657 elfcore_grok_xstatereg (bfd *abfd, Elf_Internal_Note *note)
7659 return elfcore_make_note_pseudosection (abfd, ".reg-xstate", note);
7663 elfcore_grok_ppc_vmx (bfd *abfd, Elf_Internal_Note *note)
7665 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vmx", note);
7669 elfcore_grok_ppc_vsx (bfd *abfd, Elf_Internal_Note *note)
7671 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vsx", note);
7675 elfcore_grok_s390_high_gprs (bfd *abfd, Elf_Internal_Note *note)
7677 return elfcore_make_note_pseudosection (abfd, ".reg-s390-high-gprs", note);
7681 elfcore_grok_s390_timer (bfd *abfd, Elf_Internal_Note *note)
7683 return elfcore_make_note_pseudosection (abfd, ".reg-s390-timer", note);
7687 elfcore_grok_s390_todcmp (bfd *abfd, Elf_Internal_Note *note)
7689 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todcmp", note);
7693 elfcore_grok_s390_todpreg (bfd *abfd, Elf_Internal_Note *note)
7695 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todpreg", note);
7699 elfcore_grok_s390_ctrs (bfd *abfd, Elf_Internal_Note *note)
7701 return elfcore_make_note_pseudosection (abfd, ".reg-s390-ctrs", note);
7705 elfcore_grok_s390_prefix (bfd *abfd, Elf_Internal_Note *note)
7707 return elfcore_make_note_pseudosection (abfd, ".reg-s390-prefix", note);
7710 #if defined (HAVE_PRPSINFO_T)
7711 typedef prpsinfo_t elfcore_psinfo_t;
7712 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7713 typedef prpsinfo32_t elfcore_psinfo32_t;
7717 #if defined (HAVE_PSINFO_T)
7718 typedef psinfo_t elfcore_psinfo_t;
7719 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7720 typedef psinfo32_t elfcore_psinfo32_t;
7724 /* return a malloc'ed copy of a string at START which is at
7725 most MAX bytes long, possibly without a terminating '\0'.
7726 the copy will always have a terminating '\0'. */
7729 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
7732 char *end = (char *) memchr (start, '\0', max);
7740 dups = (char *) bfd_alloc (abfd, len + 1);
7744 memcpy (dups, start, len);
7750 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7752 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
7754 if (note->descsz == sizeof (elfcore_psinfo_t))
7756 elfcore_psinfo_t psinfo;
7758 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7760 elf_tdata (abfd)->core_program
7761 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7762 sizeof (psinfo.pr_fname));
7764 elf_tdata (abfd)->core_command
7765 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7766 sizeof (psinfo.pr_psargs));
7768 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7769 else if (note->descsz == sizeof (elfcore_psinfo32_t))
7771 /* 64-bit host, 32-bit corefile */
7772 elfcore_psinfo32_t psinfo;
7774 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7776 elf_tdata (abfd)->core_program
7777 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7778 sizeof (psinfo.pr_fname));
7780 elf_tdata (abfd)->core_command
7781 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7782 sizeof (psinfo.pr_psargs));
7788 /* Fail - we don't know how to handle any other
7789 note size (ie. data object type). */
7793 /* Note that for some reason, a spurious space is tacked
7794 onto the end of the args in some (at least one anyway)
7795 implementations, so strip it off if it exists. */
7798 char *command = elf_tdata (abfd)->core_command;
7799 int n = strlen (command);
7801 if (0 < n && command[n - 1] == ' ')
7802 command[n - 1] = '\0';
7807 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7809 #if defined (HAVE_PSTATUS_T)
7811 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
7813 if (note->descsz == sizeof (pstatus_t)
7814 #if defined (HAVE_PXSTATUS_T)
7815 || note->descsz == sizeof (pxstatus_t)
7821 memcpy (&pstat, note->descdata, sizeof (pstat));
7823 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7825 #if defined (HAVE_PSTATUS32_T)
7826 else if (note->descsz == sizeof (pstatus32_t))
7828 /* 64-bit host, 32-bit corefile */
7831 memcpy (&pstat, note->descdata, sizeof (pstat));
7833 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7836 /* Could grab some more details from the "representative"
7837 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7838 NT_LWPSTATUS note, presumably. */
7842 #endif /* defined (HAVE_PSTATUS_T) */
7844 #if defined (HAVE_LWPSTATUS_T)
7846 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
7848 lwpstatus_t lwpstat;
7854 if (note->descsz != sizeof (lwpstat)
7855 #if defined (HAVE_LWPXSTATUS_T)
7856 && note->descsz != sizeof (lwpxstatus_t)
7861 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
7863 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
7864 /* Do not overwrite the core signal if it has already been set by
7866 if (elf_tdata (abfd)->core_signal == 0)
7867 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
7869 /* Make a ".reg/999" section. */
7871 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
7872 len = strlen (buf) + 1;
7873 name = bfd_alloc (abfd, len);
7876 memcpy (name, buf, len);
7878 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7882 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7883 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
7884 sect->filepos = note->descpos
7885 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
7888 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7889 sect->size = sizeof (lwpstat.pr_reg);
7890 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
7893 sect->alignment_power = 2;
7895 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
7898 /* Make a ".reg2/999" section */
7900 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
7901 len = strlen (buf) + 1;
7902 name = bfd_alloc (abfd, len);
7905 memcpy (name, buf, len);
7907 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7911 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7912 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
7913 sect->filepos = note->descpos
7914 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
7917 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7918 sect->size = sizeof (lwpstat.pr_fpreg);
7919 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
7922 sect->alignment_power = 2;
7924 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
7926 #endif /* defined (HAVE_LWPSTATUS_T) */
7929 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
7936 int is_active_thread;
7939 if (note->descsz < 728)
7942 if (! CONST_STRNEQ (note->namedata, "win32"))
7945 type = bfd_get_32 (abfd, note->descdata);
7949 case 1 /* NOTE_INFO_PROCESS */:
7950 /* FIXME: need to add ->core_command. */
7951 /* process_info.pid */
7952 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 8);
7953 /* process_info.signal */
7954 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 12);
7957 case 2 /* NOTE_INFO_THREAD */:
7958 /* Make a ".reg/999" section. */
7959 /* thread_info.tid */
7960 sprintf (buf, ".reg/%ld", (long) bfd_get_32 (abfd, note->descdata + 8));
7962 len = strlen (buf) + 1;
7963 name = (char *) bfd_alloc (abfd, len);
7967 memcpy (name, buf, len);
7969 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7973 /* sizeof (thread_info.thread_context) */
7975 /* offsetof (thread_info.thread_context) */
7976 sect->filepos = note->descpos + 12;
7977 sect->alignment_power = 2;
7979 /* thread_info.is_active_thread */
7980 is_active_thread = bfd_get_32 (abfd, note->descdata + 8);
7982 if (is_active_thread)
7983 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
7987 case 3 /* NOTE_INFO_MODULE */:
7988 /* Make a ".module/xxxxxxxx" section. */
7989 /* module_info.base_address */
7990 base_addr = bfd_get_32 (abfd, note->descdata + 4);
7991 sprintf (buf, ".module/%08lx", (unsigned long) base_addr);
7993 len = strlen (buf) + 1;
7994 name = (char *) bfd_alloc (abfd, len);
7998 memcpy (name, buf, len);
8000 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8005 sect->size = note->descsz;
8006 sect->filepos = note->descpos;
8007 sect->alignment_power = 2;
8018 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
8020 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8028 if (bed->elf_backend_grok_prstatus)
8029 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
8031 #if defined (HAVE_PRSTATUS_T)
8032 return elfcore_grok_prstatus (abfd, note);
8037 #if defined (HAVE_PSTATUS_T)
8039 return elfcore_grok_pstatus (abfd, note);
8042 #if defined (HAVE_LWPSTATUS_T)
8044 return elfcore_grok_lwpstatus (abfd, note);
8047 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
8048 return elfcore_grok_prfpreg (abfd, note);
8050 case NT_WIN32PSTATUS:
8051 return elfcore_grok_win32pstatus (abfd, note);
8053 case NT_PRXFPREG: /* Linux SSE extension */
8054 if (note->namesz == 6
8055 && strcmp (note->namedata, "LINUX") == 0)
8056 return elfcore_grok_prxfpreg (abfd, note);
8060 case NT_X86_XSTATE: /* Linux XSAVE extension */
8061 if (note->namesz == 6
8062 && strcmp (note->namedata, "LINUX") == 0)
8063 return elfcore_grok_xstatereg (abfd, note);
8068 if (note->namesz == 6
8069 && strcmp (note->namedata, "LINUX") == 0)
8070 return elfcore_grok_ppc_vmx (abfd, note);
8075 if (note->namesz == 6
8076 && strcmp (note->namedata, "LINUX") == 0)
8077 return elfcore_grok_ppc_vsx (abfd, note);
8081 case NT_S390_HIGH_GPRS:
8082 if (note->namesz == 6
8083 && strcmp (note->namedata, "LINUX") == 0)
8084 return elfcore_grok_s390_high_gprs (abfd, note);
8089 if (note->namesz == 6
8090 && strcmp (note->namedata, "LINUX") == 0)
8091 return elfcore_grok_s390_timer (abfd, note);
8095 case NT_S390_TODCMP:
8096 if (note->namesz == 6
8097 && strcmp (note->namedata, "LINUX") == 0)
8098 return elfcore_grok_s390_todcmp (abfd, note);
8102 case NT_S390_TODPREG:
8103 if (note->namesz == 6
8104 && strcmp (note->namedata, "LINUX") == 0)
8105 return elfcore_grok_s390_todpreg (abfd, note);
8110 if (note->namesz == 6
8111 && strcmp (note->namedata, "LINUX") == 0)
8112 return elfcore_grok_s390_ctrs (abfd, note);
8116 case NT_S390_PREFIX:
8117 if (note->namesz == 6
8118 && strcmp (note->namedata, "LINUX") == 0)
8119 return elfcore_grok_s390_prefix (abfd, note);
8125 if (bed->elf_backend_grok_psinfo)
8126 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
8128 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8129 return elfcore_grok_psinfo (abfd, note);
8136 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
8141 sect->size = note->descsz;
8142 sect->filepos = note->descpos;
8143 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8151 elfobj_grok_gnu_build_id (bfd *abfd, Elf_Internal_Note *note)
8153 elf_tdata (abfd)->build_id_size = note->descsz;
8154 elf_tdata (abfd)->build_id = (bfd_byte *) bfd_alloc (abfd, note->descsz);
8155 if (elf_tdata (abfd)->build_id == NULL)
8158 memcpy (elf_tdata (abfd)->build_id, note->descdata, note->descsz);
8164 elfobj_grok_gnu_note (bfd *abfd, Elf_Internal_Note *note)
8171 case NT_GNU_BUILD_ID:
8172 return elfobj_grok_gnu_build_id (abfd, note);
8177 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
8181 cp = strchr (note->namedata, '@');
8184 *lwpidp = atoi(cp + 1);
8191 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
8193 /* Signal number at offset 0x08. */
8194 elf_tdata (abfd)->core_signal
8195 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
8197 /* Process ID at offset 0x50. */
8198 elf_tdata (abfd)->core_pid
8199 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
8201 /* Command name at 0x7c (max 32 bytes, including nul). */
8202 elf_tdata (abfd)->core_command
8203 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
8205 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
8210 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
8214 if (elfcore_netbsd_get_lwpid (note, &lwp))
8215 elf_tdata (abfd)->core_lwpid = lwp;
8217 if (note->type == NT_NETBSDCORE_PROCINFO)
8219 /* NetBSD-specific core "procinfo". Note that we expect to
8220 find this note before any of the others, which is fine,
8221 since the kernel writes this note out first when it
8222 creates a core file. */
8224 return elfcore_grok_netbsd_procinfo (abfd, note);
8227 /* As of Jan 2002 there are no other machine-independent notes
8228 defined for NetBSD core files. If the note type is less
8229 than the start of the machine-dependent note types, we don't
8232 if (note->type < NT_NETBSDCORE_FIRSTMACH)
8236 switch (bfd_get_arch (abfd))
8238 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
8239 PT_GETFPREGS == mach+2. */
8241 case bfd_arch_alpha:
8242 case bfd_arch_sparc:
8245 case NT_NETBSDCORE_FIRSTMACH+0:
8246 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8248 case NT_NETBSDCORE_FIRSTMACH+2:
8249 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8255 /* On all other arch's, PT_GETREGS == mach+1 and
8256 PT_GETFPREGS == mach+3. */
8261 case NT_NETBSDCORE_FIRSTMACH+1:
8262 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8264 case NT_NETBSDCORE_FIRSTMACH+3:
8265 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8275 elfcore_grok_openbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
8277 /* Signal number at offset 0x08. */
8278 elf_tdata (abfd)->core_signal
8279 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
8281 /* Process ID at offset 0x20. */
8282 elf_tdata (abfd)->core_pid
8283 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x20);
8285 /* Command name at 0x48 (max 32 bytes, including nul). */
8286 elf_tdata (abfd)->core_command
8287 = _bfd_elfcore_strndup (abfd, note->descdata + 0x48, 31);
8293 elfcore_grok_openbsd_note (bfd *abfd, Elf_Internal_Note *note)
8295 if (note->type == NT_OPENBSD_PROCINFO)
8296 return elfcore_grok_openbsd_procinfo (abfd, note);
8298 if (note->type == NT_OPENBSD_REGS)
8299 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8301 if (note->type == NT_OPENBSD_FPREGS)
8302 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8304 if (note->type == NT_OPENBSD_XFPREGS)
8305 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
8307 if (note->type == NT_OPENBSD_AUXV)
8309 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
8314 sect->size = note->descsz;
8315 sect->filepos = note->descpos;
8316 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8321 if (note->type == NT_OPENBSD_WCOOKIE)
8323 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".wcookie",
8328 sect->size = note->descsz;
8329 sect->filepos = note->descpos;
8330 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8339 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, long *tid)
8341 void *ddata = note->descdata;
8348 /* nto_procfs_status 'pid' field is at offset 0. */
8349 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
8351 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
8352 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
8354 /* nto_procfs_status 'flags' field is at offset 8. */
8355 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
8357 /* nto_procfs_status 'what' field is at offset 14. */
8358 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
8360 elf_tdata (abfd)->core_signal = sig;
8361 elf_tdata (abfd)->core_lwpid = *tid;
8364 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
8365 do not come from signals so we make sure we set the current
8366 thread just in case. */
8367 if (flags & 0x00000080)
8368 elf_tdata (abfd)->core_lwpid = *tid;
8370 /* Make a ".qnx_core_status/%d" section. */
8371 sprintf (buf, ".qnx_core_status/%ld", *tid);
8373 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
8378 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8382 sect->size = note->descsz;
8383 sect->filepos = note->descpos;
8384 sect->alignment_power = 2;
8386 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
8390 elfcore_grok_nto_regs (bfd *abfd,
8391 Elf_Internal_Note *note,
8399 /* Make a "(base)/%d" section. */
8400 sprintf (buf, "%s/%ld", base, tid);
8402 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
8407 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8411 sect->size = note->descsz;
8412 sect->filepos = note->descpos;
8413 sect->alignment_power = 2;
8415 /* This is the current thread. */
8416 if (elf_tdata (abfd)->core_lwpid == tid)
8417 return elfcore_maybe_make_sect (abfd, base, sect);
8422 #define BFD_QNT_CORE_INFO 7
8423 #define BFD_QNT_CORE_STATUS 8
8424 #define BFD_QNT_CORE_GREG 9
8425 #define BFD_QNT_CORE_FPREG 10
8428 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
8430 /* Every GREG section has a STATUS section before it. Store the
8431 tid from the previous call to pass down to the next gregs
8433 static long tid = 1;
8437 case BFD_QNT_CORE_INFO:
8438 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
8439 case BFD_QNT_CORE_STATUS:
8440 return elfcore_grok_nto_status (abfd, note, &tid);
8441 case BFD_QNT_CORE_GREG:
8442 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
8443 case BFD_QNT_CORE_FPREG:
8444 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
8451 elfcore_grok_spu_note (bfd *abfd, Elf_Internal_Note *note)
8457 /* Use note name as section name. */
8459 name = (char *) bfd_alloc (abfd, len);
8462 memcpy (name, note->namedata, len);
8463 name[len - 1] = '\0';
8465 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8469 sect->size = note->descsz;
8470 sect->filepos = note->descpos;
8471 sect->alignment_power = 1;
8476 /* Function: elfcore_write_note
8479 buffer to hold note, and current size of buffer
8483 size of data for note
8485 Writes note to end of buffer. ELF64 notes are written exactly as
8486 for ELF32, despite the current (as of 2006) ELF gabi specifying
8487 that they ought to have 8-byte namesz and descsz field, and have
8488 8-byte alignment. Other writers, eg. Linux kernel, do the same.
8491 Pointer to realloc'd buffer, *BUFSIZ updated. */
8494 elfcore_write_note (bfd *abfd,
8502 Elf_External_Note *xnp;
8509 namesz = strlen (name) + 1;
8511 newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4);
8513 buf = (char *) realloc (buf, *bufsiz + newspace);
8516 dest = buf + *bufsiz;
8517 *bufsiz += newspace;
8518 xnp = (Elf_External_Note *) dest;
8519 H_PUT_32 (abfd, namesz, xnp->namesz);
8520 H_PUT_32 (abfd, size, xnp->descsz);
8521 H_PUT_32 (abfd, type, xnp->type);
8525 memcpy (dest, name, namesz);
8533 memcpy (dest, input, size);
8543 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8545 elfcore_write_prpsinfo (bfd *abfd,
8551 const char *note_name = "CORE";
8552 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8554 if (bed->elf_backend_write_core_note != NULL)
8557 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8558 NT_PRPSINFO, fname, psargs);
8563 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
8564 if (bed->s->elfclass == ELFCLASS32)
8566 #if defined (HAVE_PSINFO32_T)
8568 int note_type = NT_PSINFO;
8571 int note_type = NT_PRPSINFO;
8574 memset (&data, 0, sizeof (data));
8575 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8576 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8577 return elfcore_write_note (abfd, buf, bufsiz,
8578 note_name, note_type, &data, sizeof (data));
8583 #if defined (HAVE_PSINFO_T)
8585 int note_type = NT_PSINFO;
8588 int note_type = NT_PRPSINFO;
8591 memset (&data, 0, sizeof (data));
8592 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8593 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8594 return elfcore_write_note (abfd, buf, bufsiz,
8595 note_name, note_type, &data, sizeof (data));
8598 #endif /* PSINFO_T or PRPSINFO_T */
8600 #if defined (HAVE_PRSTATUS_T)
8602 elfcore_write_prstatus (bfd *abfd,
8609 const char *note_name = "CORE";
8610 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8612 if (bed->elf_backend_write_core_note != NULL)
8615 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8617 pid, cursig, gregs);
8622 #if defined (HAVE_PRSTATUS32_T)
8623 if (bed->s->elfclass == ELFCLASS32)
8625 prstatus32_t prstat;
8627 memset (&prstat, 0, sizeof (prstat));
8628 prstat.pr_pid = pid;
8629 prstat.pr_cursig = cursig;
8630 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8631 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8632 NT_PRSTATUS, &prstat, sizeof (prstat));
8639 memset (&prstat, 0, sizeof (prstat));
8640 prstat.pr_pid = pid;
8641 prstat.pr_cursig = cursig;
8642 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8643 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8644 NT_PRSTATUS, &prstat, sizeof (prstat));
8647 #endif /* HAVE_PRSTATUS_T */
8649 #if defined (HAVE_LWPSTATUS_T)
8651 elfcore_write_lwpstatus (bfd *abfd,
8658 lwpstatus_t lwpstat;
8659 const char *note_name = "CORE";
8661 memset (&lwpstat, 0, sizeof (lwpstat));
8662 lwpstat.pr_lwpid = pid >> 16;
8663 lwpstat.pr_cursig = cursig;
8664 #if defined (HAVE_LWPSTATUS_T_PR_REG)
8665 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
8666 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8668 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
8669 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
8671 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
8672 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
8675 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8676 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
8678 #endif /* HAVE_LWPSTATUS_T */
8680 #if defined (HAVE_PSTATUS_T)
8682 elfcore_write_pstatus (bfd *abfd,
8686 int cursig ATTRIBUTE_UNUSED,
8687 const void *gregs ATTRIBUTE_UNUSED)
8689 const char *note_name = "CORE";
8690 #if defined (HAVE_PSTATUS32_T)
8691 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8693 if (bed->s->elfclass == ELFCLASS32)
8697 memset (&pstat, 0, sizeof (pstat));
8698 pstat.pr_pid = pid & 0xffff;
8699 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8700 NT_PSTATUS, &pstat, sizeof (pstat));
8708 memset (&pstat, 0, sizeof (pstat));
8709 pstat.pr_pid = pid & 0xffff;
8710 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8711 NT_PSTATUS, &pstat, sizeof (pstat));
8715 #endif /* HAVE_PSTATUS_T */
8718 elfcore_write_prfpreg (bfd *abfd,
8724 const char *note_name = "CORE";
8725 return elfcore_write_note (abfd, buf, bufsiz,
8726 note_name, NT_FPREGSET, fpregs, size);
8730 elfcore_write_prxfpreg (bfd *abfd,
8733 const void *xfpregs,
8736 char *note_name = "LINUX";
8737 return elfcore_write_note (abfd, buf, bufsiz,
8738 note_name, NT_PRXFPREG, xfpregs, size);
8742 elfcore_write_xstatereg (bfd *abfd, char *buf, int *bufsiz,
8743 const void *xfpregs, int size)
8745 char *note_name = "LINUX";
8746 return elfcore_write_note (abfd, buf, bufsiz,
8747 note_name, NT_X86_XSTATE, xfpregs, size);
8751 elfcore_write_ppc_vmx (bfd *abfd,
8754 const void *ppc_vmx,
8757 char *note_name = "LINUX";
8758 return elfcore_write_note (abfd, buf, bufsiz,
8759 note_name, NT_PPC_VMX, ppc_vmx, size);
8763 elfcore_write_ppc_vsx (bfd *abfd,
8766 const void *ppc_vsx,
8769 char *note_name = "LINUX";
8770 return elfcore_write_note (abfd, buf, bufsiz,
8771 note_name, NT_PPC_VSX, ppc_vsx, size);
8775 elfcore_write_s390_high_gprs (bfd *abfd,
8778 const void *s390_high_gprs,
8781 char *note_name = "LINUX";
8782 return elfcore_write_note (abfd, buf, bufsiz,
8783 note_name, NT_S390_HIGH_GPRS,
8784 s390_high_gprs, size);
8788 elfcore_write_s390_timer (bfd *abfd,
8791 const void *s390_timer,
8794 char *note_name = "LINUX";
8795 return elfcore_write_note (abfd, buf, bufsiz,
8796 note_name, NT_S390_TIMER, s390_timer, size);
8800 elfcore_write_s390_todcmp (bfd *abfd,
8803 const void *s390_todcmp,
8806 char *note_name = "LINUX";
8807 return elfcore_write_note (abfd, buf, bufsiz,
8808 note_name, NT_S390_TODCMP, s390_todcmp, size);
8812 elfcore_write_s390_todpreg (bfd *abfd,
8815 const void *s390_todpreg,
8818 char *note_name = "LINUX";
8819 return elfcore_write_note (abfd, buf, bufsiz,
8820 note_name, NT_S390_TODPREG, s390_todpreg, size);
8824 elfcore_write_s390_ctrs (bfd *abfd,
8827 const void *s390_ctrs,
8830 char *note_name = "LINUX";
8831 return elfcore_write_note (abfd, buf, bufsiz,
8832 note_name, NT_S390_CTRS, s390_ctrs, size);
8836 elfcore_write_s390_prefix (bfd *abfd,
8839 const void *s390_prefix,
8842 char *note_name = "LINUX";
8843 return elfcore_write_note (abfd, buf, bufsiz,
8844 note_name, NT_S390_PREFIX, s390_prefix, size);
8848 elfcore_write_register_note (bfd *abfd,
8851 const char *section,
8855 if (strcmp (section, ".reg2") == 0)
8856 return elfcore_write_prfpreg (abfd, buf, bufsiz, data, size);
8857 if (strcmp (section, ".reg-xfp") == 0)
8858 return elfcore_write_prxfpreg (abfd, buf, bufsiz, data, size);
8859 if (strcmp (section, ".reg-xstate") == 0)
8860 return elfcore_write_xstatereg (abfd, buf, bufsiz, data, size);
8861 if (strcmp (section, ".reg-ppc-vmx") == 0)
8862 return elfcore_write_ppc_vmx (abfd, buf, bufsiz, data, size);
8863 if (strcmp (section, ".reg-ppc-vsx") == 0)
8864 return elfcore_write_ppc_vsx (abfd, buf, bufsiz, data, size);
8865 if (strcmp (section, ".reg-s390-high-gprs") == 0)
8866 return elfcore_write_s390_high_gprs (abfd, buf, bufsiz, data, size);
8867 if (strcmp (section, ".reg-s390-timer") == 0)
8868 return elfcore_write_s390_timer (abfd, buf, bufsiz, data, size);
8869 if (strcmp (section, ".reg-s390-todcmp") == 0)
8870 return elfcore_write_s390_todcmp (abfd, buf, bufsiz, data, size);
8871 if (strcmp (section, ".reg-s390-todpreg") == 0)
8872 return elfcore_write_s390_todpreg (abfd, buf, bufsiz, data, size);
8873 if (strcmp (section, ".reg-s390-ctrs") == 0)
8874 return elfcore_write_s390_ctrs (abfd, buf, bufsiz, data, size);
8875 if (strcmp (section, ".reg-s390-prefix") == 0)
8876 return elfcore_write_s390_prefix (abfd, buf, bufsiz, data, size);
8881 elf_parse_notes (bfd *abfd, char *buf, size_t size, file_ptr offset)
8886 while (p < buf + size)
8888 /* FIXME: bad alignment assumption. */
8889 Elf_External_Note *xnp = (Elf_External_Note *) p;
8890 Elf_Internal_Note in;
8892 if (offsetof (Elf_External_Note, name) > buf - p + size)
8895 in.type = H_GET_32 (abfd, xnp->type);
8897 in.namesz = H_GET_32 (abfd, xnp->namesz);
8898 in.namedata = xnp->name;
8899 if (in.namesz > buf - in.namedata + size)
8902 in.descsz = H_GET_32 (abfd, xnp->descsz);
8903 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
8904 in.descpos = offset + (in.descdata - buf);
8906 && (in.descdata >= buf + size
8907 || in.descsz > buf - in.descdata + size))
8910 switch (bfd_get_format (abfd))
8916 if (CONST_STRNEQ (in.namedata, "NetBSD-CORE"))
8918 if (! elfcore_grok_netbsd_note (abfd, &in))
8921 else if (CONST_STRNEQ (in.namedata, "OpenBSD"))
8923 if (! elfcore_grok_openbsd_note (abfd, &in))
8926 else if (CONST_STRNEQ (in.namedata, "QNX"))
8928 if (! elfcore_grok_nto_note (abfd, &in))
8931 else if (CONST_STRNEQ (in.namedata, "SPU/"))
8933 if (! elfcore_grok_spu_note (abfd, &in))
8938 if (! elfcore_grok_note (abfd, &in))
8944 if (in.namesz == sizeof "GNU" && strcmp (in.namedata, "GNU") == 0)
8946 if (! elfobj_grok_gnu_note (abfd, &in))
8952 p = in.descdata + BFD_ALIGN (in.descsz, 4);
8959 elf_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
8966 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
8969 buf = (char *) bfd_malloc (size);
8973 if (bfd_bread (buf, size, abfd) != size
8974 || !elf_parse_notes (abfd, buf, size, offset))
8984 /* Providing external access to the ELF program header table. */
8986 /* Return an upper bound on the number of bytes required to store a
8987 copy of ABFD's program header table entries. Return -1 if an error
8988 occurs; bfd_get_error will return an appropriate code. */
8991 bfd_get_elf_phdr_upper_bound (bfd *abfd)
8993 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8995 bfd_set_error (bfd_error_wrong_format);
8999 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
9002 /* Copy ABFD's program header table entries to *PHDRS. The entries
9003 will be stored as an array of Elf_Internal_Phdr structures, as
9004 defined in include/elf/internal.h. To find out how large the
9005 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
9007 Return the number of program header table entries read, or -1 if an
9008 error occurs; bfd_get_error will return an appropriate code. */
9011 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
9015 if (abfd->xvec->flavour != bfd_target_elf_flavour)
9017 bfd_set_error (bfd_error_wrong_format);
9021 num_phdrs = elf_elfheader (abfd)->e_phnum;
9022 memcpy (phdrs, elf_tdata (abfd)->phdr,
9023 num_phdrs * sizeof (Elf_Internal_Phdr));
9028 enum elf_reloc_type_class
9029 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
9031 return reloc_class_normal;
9034 /* For RELA architectures, return the relocation value for a
9035 relocation against a local symbol. */
9038 _bfd_elf_rela_local_sym (bfd *abfd,
9039 Elf_Internal_Sym *sym,
9041 Elf_Internal_Rela *rel)
9043 asection *sec = *psec;
9046 relocation = (sec->output_section->vma
9047 + sec->output_offset
9049 if ((sec->flags & SEC_MERGE)
9050 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
9051 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
9054 _bfd_merged_section_offset (abfd, psec,
9055 elf_section_data (sec)->sec_info,
9056 sym->st_value + rel->r_addend);
9059 /* If we have changed the section, and our original section is
9060 marked with SEC_EXCLUDE, it means that the original
9061 SEC_MERGE section has been completely subsumed in some
9062 other SEC_MERGE section. In this case, we need to leave
9063 some info around for --emit-relocs. */
9064 if ((sec->flags & SEC_EXCLUDE) != 0)
9065 sec->kept_section = *psec;
9068 rel->r_addend -= relocation;
9069 rel->r_addend += sec->output_section->vma + sec->output_offset;
9075 _bfd_elf_rel_local_sym (bfd *abfd,
9076 Elf_Internal_Sym *sym,
9080 asection *sec = *psec;
9082 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
9083 return sym->st_value + addend;
9085 return _bfd_merged_section_offset (abfd, psec,
9086 elf_section_data (sec)->sec_info,
9087 sym->st_value + addend);
9091 _bfd_elf_section_offset (bfd *abfd,
9092 struct bfd_link_info *info,
9096 switch (sec->sec_info_type)
9098 case ELF_INFO_TYPE_STABS:
9099 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
9101 case ELF_INFO_TYPE_EH_FRAME:
9102 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
9108 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
9109 reconstruct an ELF file by reading the segments out of remote memory
9110 based on the ELF file header at EHDR_VMA and the ELF program headers it
9111 points to. If not null, *LOADBASEP is filled in with the difference
9112 between the VMAs from which the segments were read, and the VMAs the
9113 file headers (and hence BFD's idea of each section's VMA) put them at.
9115 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
9116 remote memory at target address VMA into the local buffer at MYADDR; it
9117 should return zero on success or an `errno' code on failure. TEMPL must
9118 be a BFD for an ELF target with the word size and byte order found in
9119 the remote memory. */
9122 bfd_elf_bfd_from_remote_memory
9126 int (*target_read_memory) (bfd_vma, bfd_byte *, int))
9128 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
9129 (templ, ehdr_vma, loadbasep, target_read_memory);
9133 _bfd_elf_get_synthetic_symtab (bfd *abfd,
9134 long symcount ATTRIBUTE_UNUSED,
9135 asymbol **syms ATTRIBUTE_UNUSED,
9140 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9143 const char *relplt_name;
9144 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
9148 Elf_Internal_Shdr *hdr;
9154 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
9157 if (dynsymcount <= 0)
9160 if (!bed->plt_sym_val)
9163 relplt_name = bed->relplt_name;
9164 if (relplt_name == NULL)
9165 relplt_name = bed->rela_plts_and_copies_p ? ".rela.plt" : ".rel.plt";
9166 relplt = bfd_get_section_by_name (abfd, relplt_name);
9170 hdr = &elf_section_data (relplt)->this_hdr;
9171 if (hdr->sh_link != elf_dynsymtab (abfd)
9172 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
9175 plt = bfd_get_section_by_name (abfd, ".plt");
9179 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
9180 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
9183 count = relplt->size / hdr->sh_entsize;
9184 size = count * sizeof (asymbol);
9185 p = relplt->relocation;
9186 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
9188 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
9192 size += sizeof ("+0x") - 1 + 8 + 8 * (bed->s->elfclass == ELFCLASS64);
9194 size += sizeof ("+0x") - 1 + 8;
9199 s = *ret = (asymbol *) bfd_malloc (size);
9203 names = (char *) (s + count);
9204 p = relplt->relocation;
9206 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
9211 addr = bed->plt_sym_val (i, plt, p);
9212 if (addr == (bfd_vma) -1)
9215 *s = **p->sym_ptr_ptr;
9216 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
9217 we are defining a symbol, ensure one of them is set. */
9218 if ((s->flags & BSF_LOCAL) == 0)
9219 s->flags |= BSF_GLOBAL;
9220 s->flags |= BSF_SYNTHETIC;
9222 s->value = addr - plt->vma;
9225 len = strlen ((*p->sym_ptr_ptr)->name);
9226 memcpy (names, (*p->sym_ptr_ptr)->name, len);
9232 memcpy (names, "+0x", sizeof ("+0x") - 1);
9233 names += sizeof ("+0x") - 1;
9234 bfd_sprintf_vma (abfd, buf, p->addend);
9235 for (a = buf; *a == '0'; ++a)
9238 memcpy (names, a, len);
9241 memcpy (names, "@plt", sizeof ("@plt"));
9242 names += sizeof ("@plt");
9249 /* It is only used by x86-64 so far. */
9250 asection _bfd_elf_large_com_section
9251 = BFD_FAKE_SECTION (_bfd_elf_large_com_section,
9252 SEC_IS_COMMON, NULL, "LARGE_COMMON", 0);
9255 _bfd_elf_set_osabi (bfd * abfd,
9256 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
9258 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
9260 i_ehdrp = elf_elfheader (abfd);
9262 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
9264 /* To make things simpler for the loader on Linux systems we set the
9265 osabi field to ELFOSABI_LINUX if the binary contains symbols of
9266 the STT_GNU_IFUNC type. */
9267 if (i_ehdrp->e_ident[EI_OSABI] == ELFOSABI_NONE
9268 && elf_tdata (abfd)->has_ifunc_symbols)
9269 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_LINUX;
9273 /* Return TRUE for ELF symbol types that represent functions.
9274 This is the default version of this function, which is sufficient for
9275 most targets. It returns true if TYPE is STT_FUNC or STT_GNU_IFUNC. */
9278 _bfd_elf_is_function_type (unsigned int type)
9280 return (type == STT_FUNC
9281 || type == STT_GNU_IFUNC);