1 /* ELF executable support for BFD.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
28 BFD support for ELF formats is being worked on.
29 Currently, the best supported back ends are for sparc and i386
30 (running svr4 or Solaris 2).
32 Documentation of the internals of the support code still needs
33 to be written. The code is changing quickly enough that we
34 haven't bothered yet. */
36 /* For sparc64-cross-sparc32. */
44 #include "libiberty.h"
45 #include "safe-ctype.h"
47 static int elf_sort_sections (const void *, const void *);
48 static bfd_boolean assign_file_positions_except_relocs (bfd *, struct bfd_link_info *);
49 static bfd_boolean prep_headers (bfd *);
50 static bfd_boolean swap_out_syms (bfd *, struct bfd_strtab_hash **, int) ;
51 static bfd_boolean elfcore_read_notes (bfd *, file_ptr, bfd_size_type) ;
53 /* Swap version information in and out. The version information is
54 currently size independent. If that ever changes, this code will
55 need to move into elfcode.h. */
57 /* Swap in a Verdef structure. */
60 _bfd_elf_swap_verdef_in (bfd *abfd,
61 const Elf_External_Verdef *src,
62 Elf_Internal_Verdef *dst)
64 dst->vd_version = H_GET_16 (abfd, src->vd_version);
65 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
66 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
67 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
68 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
69 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
70 dst->vd_next = H_GET_32 (abfd, src->vd_next);
73 /* Swap out a Verdef structure. */
76 _bfd_elf_swap_verdef_out (bfd *abfd,
77 const Elf_Internal_Verdef *src,
78 Elf_External_Verdef *dst)
80 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
81 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
82 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
83 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
84 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
85 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
86 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
89 /* Swap in a Verdaux structure. */
92 _bfd_elf_swap_verdaux_in (bfd *abfd,
93 const Elf_External_Verdaux *src,
94 Elf_Internal_Verdaux *dst)
96 dst->vda_name = H_GET_32 (abfd, src->vda_name);
97 dst->vda_next = H_GET_32 (abfd, src->vda_next);
100 /* Swap out a Verdaux structure. */
103 _bfd_elf_swap_verdaux_out (bfd *abfd,
104 const Elf_Internal_Verdaux *src,
105 Elf_External_Verdaux *dst)
107 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
108 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
111 /* Swap in a Verneed structure. */
114 _bfd_elf_swap_verneed_in (bfd *abfd,
115 const Elf_External_Verneed *src,
116 Elf_Internal_Verneed *dst)
118 dst->vn_version = H_GET_16 (abfd, src->vn_version);
119 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
120 dst->vn_file = H_GET_32 (abfd, src->vn_file);
121 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
122 dst->vn_next = H_GET_32 (abfd, src->vn_next);
125 /* Swap out a Verneed structure. */
128 _bfd_elf_swap_verneed_out (bfd *abfd,
129 const Elf_Internal_Verneed *src,
130 Elf_External_Verneed *dst)
132 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
133 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
134 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
135 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
136 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
139 /* Swap in a Vernaux structure. */
142 _bfd_elf_swap_vernaux_in (bfd *abfd,
143 const Elf_External_Vernaux *src,
144 Elf_Internal_Vernaux *dst)
146 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
147 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
148 dst->vna_other = H_GET_16 (abfd, src->vna_other);
149 dst->vna_name = H_GET_32 (abfd, src->vna_name);
150 dst->vna_next = H_GET_32 (abfd, src->vna_next);
153 /* Swap out a Vernaux structure. */
156 _bfd_elf_swap_vernaux_out (bfd *abfd,
157 const Elf_Internal_Vernaux *src,
158 Elf_External_Vernaux *dst)
160 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
161 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
162 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
163 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
164 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
167 /* Swap in a Versym structure. */
170 _bfd_elf_swap_versym_in (bfd *abfd,
171 const Elf_External_Versym *src,
172 Elf_Internal_Versym *dst)
174 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
177 /* Swap out a Versym structure. */
180 _bfd_elf_swap_versym_out (bfd *abfd,
181 const Elf_Internal_Versym *src,
182 Elf_External_Versym *dst)
184 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
187 /* Standard ELF hash function. Do not change this function; you will
188 cause invalid hash tables to be generated. */
191 bfd_elf_hash (const char *namearg)
193 const unsigned char *name = (const unsigned char *) namearg;
198 while ((ch = *name++) != '\0')
201 if ((g = (h & 0xf0000000)) != 0)
204 /* The ELF ABI says `h &= ~g', but this is equivalent in
205 this case and on some machines one insn instead of two. */
209 return h & 0xffffffff;
212 /* DT_GNU_HASH hash function. Do not change this function; you will
213 cause invalid hash tables to be generated. */
216 bfd_elf_gnu_hash (const char *namearg)
218 const unsigned char *name = (const unsigned char *) namearg;
219 unsigned long h = 5381;
222 while ((ch = *name++) != '\0')
223 h = (h << 5) + h + ch;
224 return h & 0xffffffff;
228 bfd_elf_mkobject (bfd *abfd)
230 if (abfd->tdata.any == NULL)
232 abfd->tdata.any = bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
233 if (abfd->tdata.any == NULL)
237 elf_tdata (abfd)->program_header_size = (bfd_size_type) -1;
243 bfd_elf_mkcorefile (bfd *abfd)
245 /* I think this can be done just like an object file. */
246 return bfd_elf_mkobject (abfd);
250 bfd_elf_get_str_section (bfd *abfd, unsigned int shindex)
252 Elf_Internal_Shdr **i_shdrp;
253 bfd_byte *shstrtab = NULL;
255 bfd_size_type shstrtabsize;
257 i_shdrp = elf_elfsections (abfd);
259 || shindex >= elf_numsections (abfd)
260 || i_shdrp[shindex] == 0)
263 shstrtab = i_shdrp[shindex]->contents;
264 if (shstrtab == NULL)
266 /* No cached one, attempt to read, and cache what we read. */
267 offset = i_shdrp[shindex]->sh_offset;
268 shstrtabsize = i_shdrp[shindex]->sh_size;
270 /* Allocate and clear an extra byte at the end, to prevent crashes
271 in case the string table is not terminated. */
272 if (shstrtabsize + 1 == 0
273 || (shstrtab = bfd_alloc (abfd, shstrtabsize + 1)) == NULL
274 || bfd_seek (abfd, offset, SEEK_SET) != 0)
276 else if (bfd_bread (shstrtab, shstrtabsize, abfd) != shstrtabsize)
278 if (bfd_get_error () != bfd_error_system_call)
279 bfd_set_error (bfd_error_file_truncated);
283 shstrtab[shstrtabsize] = '\0';
284 i_shdrp[shindex]->contents = shstrtab;
286 return (char *) shstrtab;
290 bfd_elf_string_from_elf_section (bfd *abfd,
291 unsigned int shindex,
292 unsigned int strindex)
294 Elf_Internal_Shdr *hdr;
299 if (elf_elfsections (abfd) == NULL || shindex >= elf_numsections (abfd))
302 hdr = elf_elfsections (abfd)[shindex];
304 if (hdr->contents == NULL
305 && bfd_elf_get_str_section (abfd, shindex) == NULL)
308 if (strindex >= hdr->sh_size)
310 unsigned int shstrndx = elf_elfheader(abfd)->e_shstrndx;
311 (*_bfd_error_handler)
312 (_("%B: invalid string offset %u >= %lu for section `%s'"),
313 abfd, strindex, (unsigned long) hdr->sh_size,
314 (shindex == shstrndx && strindex == hdr->sh_name
316 : bfd_elf_string_from_elf_section (abfd, shstrndx, hdr->sh_name)));
320 return ((char *) hdr->contents) + strindex;
323 /* Read and convert symbols to internal format.
324 SYMCOUNT specifies the number of symbols to read, starting from
325 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
326 are non-NULL, they are used to store the internal symbols, external
327 symbols, and symbol section index extensions, respectively. */
330 bfd_elf_get_elf_syms (bfd *ibfd,
331 Elf_Internal_Shdr *symtab_hdr,
334 Elf_Internal_Sym *intsym_buf,
336 Elf_External_Sym_Shndx *extshndx_buf)
338 Elf_Internal_Shdr *shndx_hdr;
340 const bfd_byte *esym;
341 Elf_External_Sym_Shndx *alloc_extshndx;
342 Elf_External_Sym_Shndx *shndx;
343 Elf_Internal_Sym *isym;
344 Elf_Internal_Sym *isymend;
345 const struct elf_backend_data *bed;
353 /* Normal syms might have section extension entries. */
355 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr)
356 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr;
358 /* Read the symbols. */
360 alloc_extshndx = NULL;
361 bed = get_elf_backend_data (ibfd);
362 extsym_size = bed->s->sizeof_sym;
363 amt = symcount * extsym_size;
364 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
365 if (extsym_buf == NULL)
367 alloc_ext = bfd_malloc2 (symcount, extsym_size);
368 extsym_buf = alloc_ext;
370 if (extsym_buf == NULL
371 || bfd_seek (ibfd, pos, SEEK_SET) != 0
372 || bfd_bread (extsym_buf, amt, ibfd) != amt)
378 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
382 amt = symcount * sizeof (Elf_External_Sym_Shndx);
383 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
384 if (extshndx_buf == NULL)
386 alloc_extshndx = bfd_malloc2 (symcount,
387 sizeof (Elf_External_Sym_Shndx));
388 extshndx_buf = alloc_extshndx;
390 if (extshndx_buf == NULL
391 || bfd_seek (ibfd, pos, SEEK_SET) != 0
392 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
399 if (intsym_buf == NULL)
401 intsym_buf = bfd_malloc2 (symcount, sizeof (Elf_Internal_Sym));
402 if (intsym_buf == NULL)
406 /* Convert the symbols to internal form. */
407 isymend = intsym_buf + symcount;
408 for (esym = extsym_buf, isym = intsym_buf, shndx = extshndx_buf;
410 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
411 if (!(*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym))
413 symoffset += (esym - (bfd_byte *) extsym_buf) / extsym_size;
414 (*_bfd_error_handler) (_("%B symbol number %lu references "
415 "nonexistent SHT_SYMTAB_SHNDX section"),
416 ibfd, (unsigned long) symoffset);
422 if (alloc_ext != NULL)
424 if (alloc_extshndx != NULL)
425 free (alloc_extshndx);
430 /* Look up a symbol name. */
432 bfd_elf_sym_name (bfd *abfd,
433 Elf_Internal_Shdr *symtab_hdr,
434 Elf_Internal_Sym *isym,
438 unsigned int iname = isym->st_name;
439 unsigned int shindex = symtab_hdr->sh_link;
441 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
442 /* Check for a bogus st_shndx to avoid crashing. */
443 && isym->st_shndx < elf_numsections (abfd)
444 && !(isym->st_shndx >= SHN_LORESERVE && isym->st_shndx <= SHN_HIRESERVE))
446 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
447 shindex = elf_elfheader (abfd)->e_shstrndx;
450 name = bfd_elf_string_from_elf_section (abfd, shindex, iname);
453 else if (sym_sec && *name == '\0')
454 name = bfd_section_name (abfd, sym_sec);
459 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
460 sections. The first element is the flags, the rest are section
463 typedef union elf_internal_group {
464 Elf_Internal_Shdr *shdr;
466 } Elf_Internal_Group;
468 /* Return the name of the group signature symbol. Why isn't the
469 signature just a string? */
472 group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
474 Elf_Internal_Shdr *hdr;
475 unsigned char esym[sizeof (Elf64_External_Sym)];
476 Elf_External_Sym_Shndx eshndx;
477 Elf_Internal_Sym isym;
479 /* First we need to ensure the symbol table is available. Make sure
480 that it is a symbol table section. */
481 hdr = elf_elfsections (abfd) [ghdr->sh_link];
482 if (hdr->sh_type != SHT_SYMTAB
483 || ! bfd_section_from_shdr (abfd, ghdr->sh_link))
486 /* Go read the symbol. */
487 hdr = &elf_tdata (abfd)->symtab_hdr;
488 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
489 &isym, esym, &eshndx) == NULL)
492 return bfd_elf_sym_name (abfd, hdr, &isym, NULL);
495 /* Set next_in_group list pointer, and group name for NEWSECT. */
498 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
500 unsigned int num_group = elf_tdata (abfd)->num_group;
502 /* If num_group is zero, read in all SHT_GROUP sections. The count
503 is set to -1 if there are no SHT_GROUP sections. */
506 unsigned int i, shnum;
508 /* First count the number of groups. If we have a SHT_GROUP
509 section with just a flag word (ie. sh_size is 4), ignore it. */
510 shnum = elf_numsections (abfd);
513 #define IS_VALID_GROUP_SECTION_HEADER(shdr) \
514 ( (shdr)->sh_type == SHT_GROUP \
515 && (shdr)->sh_size >= (2 * GRP_ENTRY_SIZE) \
516 && (shdr)->sh_entsize == GRP_ENTRY_SIZE \
517 && ((shdr)->sh_size % GRP_ENTRY_SIZE) == 0)
519 for (i = 0; i < shnum; i++)
521 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
523 if (IS_VALID_GROUP_SECTION_HEADER (shdr))
529 num_group = (unsigned) -1;
530 elf_tdata (abfd)->num_group = num_group;
534 /* We keep a list of elf section headers for group sections,
535 so we can find them quickly. */
538 elf_tdata (abfd)->num_group = num_group;
539 elf_tdata (abfd)->group_sect_ptr
540 = bfd_alloc2 (abfd, num_group, sizeof (Elf_Internal_Shdr *));
541 if (elf_tdata (abfd)->group_sect_ptr == NULL)
545 for (i = 0; i < shnum; i++)
547 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
549 if (IS_VALID_GROUP_SECTION_HEADER (shdr))
552 Elf_Internal_Group *dest;
554 /* Add to list of sections. */
555 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
558 /* Read the raw contents. */
559 BFD_ASSERT (sizeof (*dest) >= 4);
560 amt = shdr->sh_size * sizeof (*dest) / 4;
561 shdr->contents = bfd_alloc2 (abfd, shdr->sh_size,
563 /* PR binutils/4110: Handle corrupt group headers. */
564 if (shdr->contents == NULL)
567 (_("%B: Corrupt size field in group section header: 0x%lx"), abfd, shdr->sh_size);
568 bfd_set_error (bfd_error_bad_value);
572 memset (shdr->contents, 0, amt);
574 if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
575 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
579 /* Translate raw contents, a flag word followed by an
580 array of elf section indices all in target byte order,
581 to the flag word followed by an array of elf section
583 src = shdr->contents + shdr->sh_size;
584 dest = (Elf_Internal_Group *) (shdr->contents + amt);
591 idx = H_GET_32 (abfd, src);
592 if (src == shdr->contents)
595 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
596 shdr->bfd_section->flags
597 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
602 ((*_bfd_error_handler)
603 (_("%B: invalid SHT_GROUP entry"), abfd));
606 dest->shdr = elf_elfsections (abfd)[idx];
613 if (num_group != (unsigned) -1)
617 for (i = 0; i < num_group; i++)
619 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
620 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
621 unsigned int n_elt = shdr->sh_size / 4;
623 /* Look through this group's sections to see if current
624 section is a member. */
626 if ((++idx)->shdr == hdr)
630 /* We are a member of this group. Go looking through
631 other members to see if any others are linked via
633 idx = (Elf_Internal_Group *) shdr->contents;
634 n_elt = shdr->sh_size / 4;
636 if ((s = (++idx)->shdr->bfd_section) != NULL
637 && elf_next_in_group (s) != NULL)
641 /* Snarf the group name from other member, and
642 insert current section in circular list. */
643 elf_group_name (newsect) = elf_group_name (s);
644 elf_next_in_group (newsect) = elf_next_in_group (s);
645 elf_next_in_group (s) = newsect;
651 gname = group_signature (abfd, shdr);
654 elf_group_name (newsect) = gname;
656 /* Start a circular list with one element. */
657 elf_next_in_group (newsect) = newsect;
660 /* If the group section has been created, point to the
662 if (shdr->bfd_section != NULL)
663 elf_next_in_group (shdr->bfd_section) = newsect;
671 if (elf_group_name (newsect) == NULL)
673 (*_bfd_error_handler) (_("%B: no group info for section %A"),
680 _bfd_elf_setup_sections (bfd *abfd)
683 unsigned int num_group = elf_tdata (abfd)->num_group;
684 bfd_boolean result = TRUE;
687 /* Process SHF_LINK_ORDER. */
688 for (s = abfd->sections; s != NULL; s = s->next)
690 Elf_Internal_Shdr *this_hdr = &elf_section_data (s)->this_hdr;
691 if ((this_hdr->sh_flags & SHF_LINK_ORDER) != 0)
693 unsigned int elfsec = this_hdr->sh_link;
694 /* FIXME: The old Intel compiler and old strip/objcopy may
695 not set the sh_link or sh_info fields. Hence we could
696 get the situation where elfsec is 0. */
699 const struct elf_backend_data *bed
700 = get_elf_backend_data (abfd);
701 if (bed->link_order_error_handler)
702 bed->link_order_error_handler
703 (_("%B: warning: sh_link not set for section `%A'"),
710 this_hdr = elf_elfsections (abfd)[elfsec];
713 Some strip/objcopy may leave an incorrect value in
714 sh_link. We don't want to proceed. */
715 link = this_hdr->bfd_section;
718 (*_bfd_error_handler)
719 (_("%B: sh_link [%d] in section `%A' is incorrect"),
720 s->owner, s, elfsec);
724 elf_linked_to_section (s) = link;
729 /* Process section groups. */
730 if (num_group == (unsigned) -1)
733 for (i = 0; i < num_group; i++)
735 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
736 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
737 unsigned int n_elt = shdr->sh_size / 4;
740 if ((++idx)->shdr->bfd_section)
741 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
742 else if (idx->shdr->sh_type == SHT_RELA
743 || idx->shdr->sh_type == SHT_REL)
744 /* We won't include relocation sections in section groups in
745 output object files. We adjust the group section size here
746 so that relocatable link will work correctly when
747 relocation sections are in section group in input object
749 shdr->bfd_section->size -= 4;
752 /* There are some unknown sections in the group. */
753 (*_bfd_error_handler)
754 (_("%B: unknown [%d] section `%s' in group [%s]"),
756 (unsigned int) idx->shdr->sh_type,
757 bfd_elf_string_from_elf_section (abfd,
758 (elf_elfheader (abfd)
761 shdr->bfd_section->name);
769 bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
771 return elf_next_in_group (sec) != NULL;
774 /* Make a BFD section from an ELF section. We store a pointer to the
775 BFD section in the bfd_section field of the header. */
778 _bfd_elf_make_section_from_shdr (bfd *abfd,
779 Elf_Internal_Shdr *hdr,
785 const struct elf_backend_data *bed;
787 if (hdr->bfd_section != NULL)
789 BFD_ASSERT (strcmp (name,
790 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
794 newsect = bfd_make_section_anyway (abfd, name);
798 hdr->bfd_section = newsect;
799 elf_section_data (newsect)->this_hdr = *hdr;
800 elf_section_data (newsect)->this_idx = shindex;
802 /* Always use the real type/flags. */
803 elf_section_type (newsect) = hdr->sh_type;
804 elf_section_flags (newsect) = hdr->sh_flags;
806 newsect->filepos = hdr->sh_offset;
808 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
809 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
810 || ! bfd_set_section_alignment (abfd, newsect,
811 bfd_log2 ((bfd_vma) hdr->sh_addralign)))
814 flags = SEC_NO_FLAGS;
815 if (hdr->sh_type != SHT_NOBITS)
816 flags |= SEC_HAS_CONTENTS;
817 if (hdr->sh_type == SHT_GROUP)
818 flags |= SEC_GROUP | SEC_EXCLUDE;
819 if ((hdr->sh_flags & SHF_ALLOC) != 0)
822 if (hdr->sh_type != SHT_NOBITS)
825 if ((hdr->sh_flags & SHF_WRITE) == 0)
826 flags |= SEC_READONLY;
827 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
829 else if ((flags & SEC_LOAD) != 0)
831 if ((hdr->sh_flags & SHF_MERGE) != 0)
834 newsect->entsize = hdr->sh_entsize;
835 if ((hdr->sh_flags & SHF_STRINGS) != 0)
836 flags |= SEC_STRINGS;
838 if (hdr->sh_flags & SHF_GROUP)
839 if (!setup_group (abfd, hdr, newsect))
841 if ((hdr->sh_flags & SHF_TLS) != 0)
842 flags |= SEC_THREAD_LOCAL;
844 if ((flags & SEC_ALLOC) == 0)
846 /* The debugging sections appear to be recognized only by name,
847 not any sort of flag. Their SEC_ALLOC bits are cleared. */
852 } debug_sections [] =
854 { STRING_COMMA_LEN ("debug") }, /* 'd' */
855 { NULL, 0 }, /* 'e' */
856 { NULL, 0 }, /* 'f' */
857 { STRING_COMMA_LEN ("gnu.linkonce.wi.") }, /* 'g' */
858 { NULL, 0 }, /* 'h' */
859 { NULL, 0 }, /* 'i' */
860 { NULL, 0 }, /* 'j' */
861 { NULL, 0 }, /* 'k' */
862 { STRING_COMMA_LEN ("line") }, /* 'l' */
863 { NULL, 0 }, /* 'm' */
864 { NULL, 0 }, /* 'n' */
865 { NULL, 0 }, /* 'o' */
866 { NULL, 0 }, /* 'p' */
867 { NULL, 0 }, /* 'q' */
868 { NULL, 0 }, /* 'r' */
869 { STRING_COMMA_LEN ("stab") } /* 's' */
874 int i = name [1] - 'd';
876 && i < (int) ARRAY_SIZE (debug_sections)
877 && debug_sections [i].name != NULL
878 && strncmp (&name [1], debug_sections [i].name,
879 debug_sections [i].len) == 0)
880 flags |= SEC_DEBUGGING;
884 /* As a GNU extension, if the name begins with .gnu.linkonce, we
885 only link a single copy of the section. This is used to support
886 g++. g++ will emit each template expansion in its own section.
887 The symbols will be defined as weak, so that multiple definitions
888 are permitted. The GNU linker extension is to actually discard
889 all but one of the sections. */
890 if (CONST_STRNEQ (name, ".gnu.linkonce")
891 && elf_next_in_group (newsect) == NULL)
892 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
894 bed = get_elf_backend_data (abfd);
895 if (bed->elf_backend_section_flags)
896 if (! bed->elf_backend_section_flags (&flags, hdr))
899 if (! bfd_set_section_flags (abfd, newsect, flags))
902 if ((flags & SEC_ALLOC) != 0)
904 Elf_Internal_Phdr *phdr;
907 /* Look through the phdrs to see if we need to adjust the lma.
908 If all the p_paddr fields are zero, we ignore them, since
909 some ELF linkers produce such output. */
910 phdr = elf_tdata (abfd)->phdr;
911 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
913 if (phdr->p_paddr != 0)
916 if (i < elf_elfheader (abfd)->e_phnum)
918 phdr = elf_tdata (abfd)->phdr;
919 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
921 /* This section is part of this segment if its file
922 offset plus size lies within the segment's memory
923 span and, if the section is loaded, the extent of the
924 loaded data lies within the extent of the segment.
926 Note - we used to check the p_paddr field as well, and
927 refuse to set the LMA if it was 0. This is wrong
928 though, as a perfectly valid initialised segment can
929 have a p_paddr of zero. Some architectures, eg ARM,
930 place special significance on the address 0 and
931 executables need to be able to have a segment which
932 covers this address. */
933 if (phdr->p_type == PT_LOAD
934 && (bfd_vma) hdr->sh_offset >= phdr->p_offset
935 && (hdr->sh_offset + hdr->sh_size
936 <= phdr->p_offset + phdr->p_memsz)
937 && ((flags & SEC_LOAD) == 0
938 || (hdr->sh_offset + hdr->sh_size
939 <= phdr->p_offset + phdr->p_filesz)))
941 if ((flags & SEC_LOAD) == 0)
942 newsect->lma = (phdr->p_paddr
943 + hdr->sh_addr - phdr->p_vaddr);
945 /* We used to use the same adjustment for SEC_LOAD
946 sections, but that doesn't work if the segment
947 is packed with code from multiple VMAs.
948 Instead we calculate the section LMA based on
949 the segment LMA. It is assumed that the
950 segment will contain sections with contiguous
951 LMAs, even if the VMAs are not. */
952 newsect->lma = (phdr->p_paddr
953 + hdr->sh_offset - phdr->p_offset);
955 /* With contiguous segments, we can't tell from file
956 offsets whether a section with zero size should
957 be placed at the end of one segment or the
958 beginning of the next. Decide based on vaddr. */
959 if (hdr->sh_addr >= phdr->p_vaddr
960 && (hdr->sh_addr + hdr->sh_size
961 <= phdr->p_vaddr + phdr->p_memsz))
976 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
979 Helper functions for GDB to locate the string tables.
980 Since BFD hides string tables from callers, GDB needs to use an
981 internal hook to find them. Sun's .stabstr, in particular,
982 isn't even pointed to by the .stab section, so ordinary
983 mechanisms wouldn't work to find it, even if we had some.
986 struct elf_internal_shdr *
987 bfd_elf_find_section (bfd *abfd, char *name)
989 Elf_Internal_Shdr **i_shdrp;
994 i_shdrp = elf_elfsections (abfd);
997 shstrtab = bfd_elf_get_str_section (abfd,
998 elf_elfheader (abfd)->e_shstrndx);
999 if (shstrtab != NULL)
1001 max = elf_numsections (abfd);
1002 for (i = 1; i < max; i++)
1003 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
1010 const char *const bfd_elf_section_type_names[] = {
1011 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
1012 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
1013 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
1016 /* ELF relocs are against symbols. If we are producing relocatable
1017 output, and the reloc is against an external symbol, and nothing
1018 has given us any additional addend, the resulting reloc will also
1019 be against the same symbol. In such a case, we don't want to
1020 change anything about the way the reloc is handled, since it will
1021 all be done at final link time. Rather than put special case code
1022 into bfd_perform_relocation, all the reloc types use this howto
1023 function. It just short circuits the reloc if producing
1024 relocatable output against an external symbol. */
1026 bfd_reloc_status_type
1027 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1028 arelent *reloc_entry,
1030 void *data ATTRIBUTE_UNUSED,
1031 asection *input_section,
1033 char **error_message ATTRIBUTE_UNUSED)
1035 if (output_bfd != NULL
1036 && (symbol->flags & BSF_SECTION_SYM) == 0
1037 && (! reloc_entry->howto->partial_inplace
1038 || reloc_entry->addend == 0))
1040 reloc_entry->address += input_section->output_offset;
1041 return bfd_reloc_ok;
1044 return bfd_reloc_continue;
1047 /* Copy the program header and other data from one object module to
1051 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
1053 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1054 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1057 BFD_ASSERT (!elf_flags_init (obfd)
1058 || (elf_elfheader (obfd)->e_flags
1059 == elf_elfheader (ibfd)->e_flags));
1061 elf_gp (obfd) = elf_gp (ibfd);
1062 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1063 elf_flags_init (obfd) = TRUE;
1065 /* Copy object attributes. */
1066 _bfd_elf_copy_obj_attributes (ibfd, obfd);
1072 get_segment_type (unsigned int p_type)
1077 case PT_NULL: pt = "NULL"; break;
1078 case PT_LOAD: pt = "LOAD"; break;
1079 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1080 case PT_INTERP: pt = "INTERP"; break;
1081 case PT_NOTE: pt = "NOTE"; break;
1082 case PT_SHLIB: pt = "SHLIB"; break;
1083 case PT_PHDR: pt = "PHDR"; break;
1084 case PT_TLS: pt = "TLS"; break;
1085 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1086 case PT_GNU_STACK: pt = "STACK"; break;
1087 case PT_GNU_RELRO: pt = "RELRO"; break;
1088 default: pt = NULL; break;
1093 /* Print out the program headers. */
1096 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1099 Elf_Internal_Phdr *p;
1101 bfd_byte *dynbuf = NULL;
1103 p = elf_tdata (abfd)->phdr;
1108 fprintf (f, _("\nProgram Header:\n"));
1109 c = elf_elfheader (abfd)->e_phnum;
1110 for (i = 0; i < c; i++, p++)
1112 const char *pt = get_segment_type (p->p_type);
1117 sprintf (buf, "0x%lx", p->p_type);
1120 fprintf (f, "%8s off 0x", pt);
1121 bfd_fprintf_vma (abfd, f, p->p_offset);
1122 fprintf (f, " vaddr 0x");
1123 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1124 fprintf (f, " paddr 0x");
1125 bfd_fprintf_vma (abfd, f, p->p_paddr);
1126 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1127 fprintf (f, " filesz 0x");
1128 bfd_fprintf_vma (abfd, f, p->p_filesz);
1129 fprintf (f, " memsz 0x");
1130 bfd_fprintf_vma (abfd, f, p->p_memsz);
1131 fprintf (f, " flags %c%c%c",
1132 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1133 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1134 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1135 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1136 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1141 s = bfd_get_section_by_name (abfd, ".dynamic");
1145 unsigned long shlink;
1146 bfd_byte *extdyn, *extdynend;
1148 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1150 fprintf (f, _("\nDynamic Section:\n"));
1152 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1155 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1158 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1160 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1161 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1164 extdynend = extdyn + s->size;
1165 for (; extdyn < extdynend; extdyn += extdynsize)
1167 Elf_Internal_Dyn dyn;
1170 bfd_boolean stringp;
1172 (*swap_dyn_in) (abfd, extdyn, &dyn);
1174 if (dyn.d_tag == DT_NULL)
1181 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1185 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1186 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1187 case DT_PLTGOT: name = "PLTGOT"; break;
1188 case DT_HASH: name = "HASH"; break;
1189 case DT_STRTAB: name = "STRTAB"; break;
1190 case DT_SYMTAB: name = "SYMTAB"; break;
1191 case DT_RELA: name = "RELA"; break;
1192 case DT_RELASZ: name = "RELASZ"; break;
1193 case DT_RELAENT: name = "RELAENT"; break;
1194 case DT_STRSZ: name = "STRSZ"; break;
1195 case DT_SYMENT: name = "SYMENT"; break;
1196 case DT_INIT: name = "INIT"; break;
1197 case DT_FINI: name = "FINI"; break;
1198 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1199 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1200 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1201 case DT_REL: name = "REL"; break;
1202 case DT_RELSZ: name = "RELSZ"; break;
1203 case DT_RELENT: name = "RELENT"; break;
1204 case DT_PLTREL: name = "PLTREL"; break;
1205 case DT_DEBUG: name = "DEBUG"; break;
1206 case DT_TEXTREL: name = "TEXTREL"; break;
1207 case DT_JMPREL: name = "JMPREL"; break;
1208 case DT_BIND_NOW: name = "BIND_NOW"; break;
1209 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1210 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1211 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1212 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1213 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1214 case DT_FLAGS: name = "FLAGS"; break;
1215 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1216 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1217 case DT_CHECKSUM: name = "CHECKSUM"; break;
1218 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1219 case DT_MOVEENT: name = "MOVEENT"; break;
1220 case DT_MOVESZ: name = "MOVESZ"; break;
1221 case DT_FEATURE: name = "FEATURE"; break;
1222 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1223 case DT_SYMINSZ: name = "SYMINSZ"; break;
1224 case DT_SYMINENT: name = "SYMINENT"; break;
1225 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1226 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1227 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1228 case DT_PLTPAD: name = "PLTPAD"; break;
1229 case DT_MOVETAB: name = "MOVETAB"; break;
1230 case DT_SYMINFO: name = "SYMINFO"; break;
1231 case DT_RELACOUNT: name = "RELACOUNT"; break;
1232 case DT_RELCOUNT: name = "RELCOUNT"; break;
1233 case DT_FLAGS_1: name = "FLAGS_1"; break;
1234 case DT_VERSYM: name = "VERSYM"; break;
1235 case DT_VERDEF: name = "VERDEF"; break;
1236 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1237 case DT_VERNEED: name = "VERNEED"; break;
1238 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1239 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1240 case DT_USED: name = "USED"; break;
1241 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1242 case DT_GNU_HASH: name = "GNU_HASH"; break;
1245 fprintf (f, " %-11s ", name);
1247 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
1251 unsigned int tagv = dyn.d_un.d_val;
1253 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1256 fprintf (f, "%s", string);
1265 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1266 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1268 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1272 if (elf_dynverdef (abfd) != 0)
1274 Elf_Internal_Verdef *t;
1276 fprintf (f, _("\nVersion definitions:\n"));
1277 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1279 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1280 t->vd_flags, t->vd_hash,
1281 t->vd_nodename ? t->vd_nodename : "<corrupt>");
1282 if (t->vd_auxptr != NULL && t->vd_auxptr->vda_nextptr != NULL)
1284 Elf_Internal_Verdaux *a;
1287 for (a = t->vd_auxptr->vda_nextptr;
1291 a->vda_nodename ? a->vda_nodename : "<corrupt>");
1297 if (elf_dynverref (abfd) != 0)
1299 Elf_Internal_Verneed *t;
1301 fprintf (f, _("\nVersion References:\n"));
1302 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1304 Elf_Internal_Vernaux *a;
1306 fprintf (f, _(" required from %s:\n"),
1307 t->vn_filename ? t->vn_filename : "<corrupt>");
1308 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1309 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1310 a->vna_flags, a->vna_other,
1311 a->vna_nodename ? a->vna_nodename : "<corrupt>");
1323 /* Display ELF-specific fields of a symbol. */
1326 bfd_elf_print_symbol (bfd *abfd,
1329 bfd_print_symbol_type how)
1334 case bfd_print_symbol_name:
1335 fprintf (file, "%s", symbol->name);
1337 case bfd_print_symbol_more:
1338 fprintf (file, "elf ");
1339 bfd_fprintf_vma (abfd, file, symbol->value);
1340 fprintf (file, " %lx", (long) symbol->flags);
1342 case bfd_print_symbol_all:
1344 const char *section_name;
1345 const char *name = NULL;
1346 const struct elf_backend_data *bed;
1347 unsigned char st_other;
1350 section_name = symbol->section ? symbol->section->name : "(*none*)";
1352 bed = get_elf_backend_data (abfd);
1353 if (bed->elf_backend_print_symbol_all)
1354 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1358 name = symbol->name;
1359 bfd_print_symbol_vandf (abfd, file, symbol);
1362 fprintf (file, " %s\t", section_name);
1363 /* Print the "other" value for a symbol. For common symbols,
1364 we've already printed the size; now print the alignment.
1365 For other symbols, we have no specified alignment, and
1366 we've printed the address; now print the size. */
1367 if (symbol->section && bfd_is_com_section (symbol->section))
1368 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1370 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1371 bfd_fprintf_vma (abfd, file, val);
1373 /* If we have version information, print it. */
1374 if (elf_tdata (abfd)->dynversym_section != 0
1375 && (elf_tdata (abfd)->dynverdef_section != 0
1376 || elf_tdata (abfd)->dynverref_section != 0))
1378 unsigned int vernum;
1379 const char *version_string;
1381 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1384 version_string = "";
1385 else if (vernum == 1)
1386 version_string = "Base";
1387 else if (vernum <= elf_tdata (abfd)->cverdefs)
1389 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1392 Elf_Internal_Verneed *t;
1394 version_string = "";
1395 for (t = elf_tdata (abfd)->verref;
1399 Elf_Internal_Vernaux *a;
1401 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1403 if (a->vna_other == vernum)
1405 version_string = a->vna_nodename;
1412 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1413 fprintf (file, " %-11s", version_string);
1418 fprintf (file, " (%s)", version_string);
1419 for (i = 10 - strlen (version_string); i > 0; --i)
1424 /* If the st_other field is not zero, print it. */
1425 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1430 case STV_INTERNAL: fprintf (file, " .internal"); break;
1431 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1432 case STV_PROTECTED: fprintf (file, " .protected"); break;
1434 /* Some other non-defined flags are also present, so print
1436 fprintf (file, " 0x%02x", (unsigned int) st_other);
1439 fprintf (file, " %s", name);
1445 /* Allocate an ELF string table--force the first byte to be zero. */
1447 struct bfd_strtab_hash *
1448 _bfd_elf_stringtab_init (void)
1450 struct bfd_strtab_hash *ret;
1452 ret = _bfd_stringtab_init ();
1457 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1458 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1459 if (loc == (bfd_size_type) -1)
1461 _bfd_stringtab_free (ret);
1468 /* ELF .o/exec file reading */
1470 /* Create a new bfd section from an ELF section header. */
1473 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1475 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
1476 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
1477 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1480 name = bfd_elf_string_from_elf_section (abfd,
1481 elf_elfheader (abfd)->e_shstrndx,
1486 switch (hdr->sh_type)
1489 /* Inactive section. Throw it away. */
1492 case SHT_PROGBITS: /* Normal section with contents. */
1493 case SHT_NOBITS: /* .bss section. */
1494 case SHT_HASH: /* .hash section. */
1495 case SHT_NOTE: /* .note section. */
1496 case SHT_INIT_ARRAY: /* .init_array section. */
1497 case SHT_FINI_ARRAY: /* .fini_array section. */
1498 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1499 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
1500 case SHT_GNU_HASH: /* .gnu.hash section. */
1501 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1503 case SHT_DYNAMIC: /* Dynamic linking information. */
1504 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1506 if (hdr->sh_link > elf_numsections (abfd)
1507 || elf_elfsections (abfd)[hdr->sh_link] == NULL)
1509 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1511 Elf_Internal_Shdr *dynsymhdr;
1513 /* The shared libraries distributed with hpux11 have a bogus
1514 sh_link field for the ".dynamic" section. Find the
1515 string table for the ".dynsym" section instead. */
1516 if (elf_dynsymtab (abfd) != 0)
1518 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1519 hdr->sh_link = dynsymhdr->sh_link;
1523 unsigned int i, num_sec;
1525 num_sec = elf_numsections (abfd);
1526 for (i = 1; i < num_sec; i++)
1528 dynsymhdr = elf_elfsections (abfd)[i];
1529 if (dynsymhdr->sh_type == SHT_DYNSYM)
1531 hdr->sh_link = dynsymhdr->sh_link;
1539 case SHT_SYMTAB: /* A symbol table */
1540 if (elf_onesymtab (abfd) == shindex)
1543 if (hdr->sh_entsize != bed->s->sizeof_sym)
1545 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1546 elf_onesymtab (abfd) = shindex;
1547 elf_tdata (abfd)->symtab_hdr = *hdr;
1548 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1549 abfd->flags |= HAS_SYMS;
1551 /* Sometimes a shared object will map in the symbol table. If
1552 SHF_ALLOC is set, and this is a shared object, then we also
1553 treat this section as a BFD section. We can not base the
1554 decision purely on SHF_ALLOC, because that flag is sometimes
1555 set in a relocatable object file, which would confuse the
1557 if ((hdr->sh_flags & SHF_ALLOC) != 0
1558 && (abfd->flags & DYNAMIC) != 0
1559 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1563 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1564 can't read symbols without that section loaded as well. It
1565 is most likely specified by the next section header. */
1566 if (elf_elfsections (abfd)[elf_symtab_shndx (abfd)]->sh_link != shindex)
1568 unsigned int i, num_sec;
1570 num_sec = elf_numsections (abfd);
1571 for (i = shindex + 1; i < num_sec; i++)
1573 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1574 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1575 && hdr2->sh_link == shindex)
1579 for (i = 1; i < shindex; i++)
1581 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1582 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1583 && hdr2->sh_link == shindex)
1587 return bfd_section_from_shdr (abfd, i);
1591 case SHT_DYNSYM: /* A dynamic symbol table */
1592 if (elf_dynsymtab (abfd) == shindex)
1595 if (hdr->sh_entsize != bed->s->sizeof_sym)
1597 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1598 elf_dynsymtab (abfd) = shindex;
1599 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1600 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1601 abfd->flags |= HAS_SYMS;
1603 /* Besides being a symbol table, we also treat this as a regular
1604 section, so that objcopy can handle it. */
1605 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1607 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1608 if (elf_symtab_shndx (abfd) == shindex)
1611 BFD_ASSERT (elf_symtab_shndx (abfd) == 0);
1612 elf_symtab_shndx (abfd) = shindex;
1613 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1614 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1617 case SHT_STRTAB: /* A string table */
1618 if (hdr->bfd_section != NULL)
1620 if (ehdr->e_shstrndx == shindex)
1622 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1623 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1626 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
1629 elf_tdata (abfd)->strtab_hdr = *hdr;
1630 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
1633 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
1636 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1637 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
1638 elf_elfsections (abfd)[shindex] = hdr;
1639 /* We also treat this as a regular section, so that objcopy
1641 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1645 /* If the string table isn't one of the above, then treat it as a
1646 regular section. We need to scan all the headers to be sure,
1647 just in case this strtab section appeared before the above. */
1648 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
1650 unsigned int i, num_sec;
1652 num_sec = elf_numsections (abfd);
1653 for (i = 1; i < num_sec; i++)
1655 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1656 if (hdr2->sh_link == shindex)
1658 /* Prevent endless recursion on broken objects. */
1661 if (! bfd_section_from_shdr (abfd, i))
1663 if (elf_onesymtab (abfd) == i)
1665 if (elf_dynsymtab (abfd) == i)
1666 goto dynsymtab_strtab;
1670 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1674 /* *These* do a lot of work -- but build no sections! */
1676 asection *target_sect;
1677 Elf_Internal_Shdr *hdr2;
1678 unsigned int num_sec = elf_numsections (abfd);
1681 != (bfd_size_type) (hdr->sh_type == SHT_REL
1682 ? bed->s->sizeof_rel : bed->s->sizeof_rela))
1685 /* Check for a bogus link to avoid crashing. */
1686 if ((hdr->sh_link >= SHN_LORESERVE && hdr->sh_link <= SHN_HIRESERVE)
1687 || hdr->sh_link >= num_sec)
1689 ((*_bfd_error_handler)
1690 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1691 abfd, hdr->sh_link, name, shindex));
1692 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1696 /* For some incomprehensible reason Oracle distributes
1697 libraries for Solaris in which some of the objects have
1698 bogus sh_link fields. It would be nice if we could just
1699 reject them, but, unfortunately, some people need to use
1700 them. We scan through the section headers; if we find only
1701 one suitable symbol table, we clobber the sh_link to point
1702 to it. I hope this doesn't break anything. */
1703 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1704 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1710 for (scan = 1; scan < num_sec; scan++)
1712 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1713 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1724 hdr->sh_link = found;
1727 /* Get the symbol table. */
1728 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1729 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
1730 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1733 /* If this reloc section does not use the main symbol table we
1734 don't treat it as a reloc section. BFD can't adequately
1735 represent such a section, so at least for now, we don't
1736 try. We just present it as a normal section. We also
1737 can't use it as a reloc section if it points to the null
1738 section, an invalid section, or another reloc section. */
1739 if (hdr->sh_link != elf_onesymtab (abfd)
1740 || hdr->sh_info == SHN_UNDEF
1741 || (hdr->sh_info >= SHN_LORESERVE && hdr->sh_info <= SHN_HIRESERVE)
1742 || hdr->sh_info >= num_sec
1743 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL
1744 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_RELA)
1745 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1748 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1750 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1751 if (target_sect == NULL)
1754 if ((target_sect->flags & SEC_RELOC) == 0
1755 || target_sect->reloc_count == 0)
1756 hdr2 = &elf_section_data (target_sect)->rel_hdr;
1760 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
1761 amt = sizeof (*hdr2);
1762 hdr2 = bfd_alloc (abfd, amt);
1763 elf_section_data (target_sect)->rel_hdr2 = hdr2;
1766 elf_elfsections (abfd)[shindex] = hdr2;
1767 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
1768 target_sect->flags |= SEC_RELOC;
1769 target_sect->relocation = NULL;
1770 target_sect->rel_filepos = hdr->sh_offset;
1771 /* In the section to which the relocations apply, mark whether
1772 its relocations are of the REL or RELA variety. */
1773 if (hdr->sh_size != 0)
1774 target_sect->use_rela_p = hdr->sh_type == SHT_RELA;
1775 abfd->flags |= HAS_RELOC;
1779 case SHT_GNU_verdef:
1780 elf_dynverdef (abfd) = shindex;
1781 elf_tdata (abfd)->dynverdef_hdr = *hdr;
1782 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1784 case SHT_GNU_versym:
1785 if (hdr->sh_entsize != sizeof (Elf_External_Versym))
1787 elf_dynversym (abfd) = shindex;
1788 elf_tdata (abfd)->dynversym_hdr = *hdr;
1789 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1791 case SHT_GNU_verneed:
1792 elf_dynverref (abfd) = shindex;
1793 elf_tdata (abfd)->dynverref_hdr = *hdr;
1794 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1800 /* We need a BFD section for objcopy and relocatable linking,
1801 and it's handy to have the signature available as the section
1803 if (! IS_VALID_GROUP_SECTION_HEADER (hdr))
1805 name = group_signature (abfd, hdr);
1808 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1810 if (hdr->contents != NULL)
1812 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
1813 unsigned int n_elt = hdr->sh_size / GRP_ENTRY_SIZE;
1816 if (idx->flags & GRP_COMDAT)
1817 hdr->bfd_section->flags
1818 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
1820 /* We try to keep the same section order as it comes in. */
1822 while (--n_elt != 0)
1826 if (idx->shdr != NULL
1827 && (s = idx->shdr->bfd_section) != NULL
1828 && elf_next_in_group (s) != NULL)
1830 elf_next_in_group (hdr->bfd_section) = s;
1838 /* Possibly an attributes section. */
1839 if (hdr->sh_type == SHT_GNU_ATTRIBUTES
1840 || hdr->sh_type == bed->obj_attrs_section_type)
1842 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1844 _bfd_elf_parse_attributes (abfd, hdr);
1848 /* Check for any processor-specific section types. */
1849 if (bed->elf_backend_section_from_shdr (abfd, hdr, name, shindex))
1852 if (hdr->sh_type >= SHT_LOUSER && hdr->sh_type <= SHT_HIUSER)
1854 if ((hdr->sh_flags & SHF_ALLOC) != 0)
1855 /* FIXME: How to properly handle allocated section reserved
1856 for applications? */
1857 (*_bfd_error_handler)
1858 (_("%B: don't know how to handle allocated, application "
1859 "specific section `%s' [0x%8x]"),
1860 abfd, name, hdr->sh_type);
1862 /* Allow sections reserved for applications. */
1863 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1866 else if (hdr->sh_type >= SHT_LOPROC
1867 && hdr->sh_type <= SHT_HIPROC)
1868 /* FIXME: We should handle this section. */
1869 (*_bfd_error_handler)
1870 (_("%B: don't know how to handle processor specific section "
1872 abfd, name, hdr->sh_type);
1873 else if (hdr->sh_type >= SHT_LOOS && hdr->sh_type <= SHT_HIOS)
1875 /* Unrecognised OS-specific sections. */
1876 if ((hdr->sh_flags & SHF_OS_NONCONFORMING) != 0)
1877 /* SHF_OS_NONCONFORMING indicates that special knowledge is
1878 required to correctly process the section and the file should
1879 be rejected with an error message. */
1880 (*_bfd_error_handler)
1881 (_("%B: don't know how to handle OS specific section "
1883 abfd, name, hdr->sh_type);
1885 /* Otherwise it should be processed. */
1886 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1889 /* FIXME: We should handle this section. */
1890 (*_bfd_error_handler)
1891 (_("%B: don't know how to handle section `%s' [0x%8x]"),
1892 abfd, name, hdr->sh_type);
1900 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
1901 Return SEC for sections that have no elf section, and NULL on error. */
1904 bfd_section_from_r_symndx (bfd *abfd,
1905 struct sym_sec_cache *cache,
1907 unsigned long r_symndx)
1909 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
1912 if (cache->abfd != abfd || cache->indx[ent] != r_symndx)
1914 Elf_Internal_Shdr *symtab_hdr;
1915 unsigned char esym[sizeof (Elf64_External_Sym)];
1916 Elf_External_Sym_Shndx eshndx;
1917 Elf_Internal_Sym isym;
1919 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1920 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
1921 &isym, esym, &eshndx) == NULL)
1924 if (cache->abfd != abfd)
1926 memset (cache->indx, -1, sizeof (cache->indx));
1929 cache->indx[ent] = r_symndx;
1930 cache->shndx[ent] = isym.st_shndx;
1933 s = bfd_section_from_elf_index (abfd, cache->shndx[ent]);
1940 /* Given an ELF section number, retrieve the corresponding BFD
1944 bfd_section_from_elf_index (bfd *abfd, unsigned int index)
1946 if (index >= elf_numsections (abfd))
1948 return elf_elfsections (abfd)[index]->bfd_section;
1951 static const struct bfd_elf_special_section special_sections_b[] =
1953 { STRING_COMMA_LEN (".bss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1954 { NULL, 0, 0, 0, 0 }
1957 static const struct bfd_elf_special_section special_sections_c[] =
1959 { STRING_COMMA_LEN (".comment"), 0, SHT_PROGBITS, 0 },
1960 { NULL, 0, 0, 0, 0 }
1963 static const struct bfd_elf_special_section special_sections_d[] =
1965 { STRING_COMMA_LEN (".data"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1966 { STRING_COMMA_LEN (".data1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1967 { STRING_COMMA_LEN (".debug"), 0, SHT_PROGBITS, 0 },
1968 { STRING_COMMA_LEN (".debug_line"), 0, SHT_PROGBITS, 0 },
1969 { STRING_COMMA_LEN (".debug_info"), 0, SHT_PROGBITS, 0 },
1970 { STRING_COMMA_LEN (".debug_abbrev"), 0, SHT_PROGBITS, 0 },
1971 { STRING_COMMA_LEN (".debug_aranges"), 0, SHT_PROGBITS, 0 },
1972 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, SHF_ALLOC },
1973 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, SHF_ALLOC },
1974 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, SHF_ALLOC },
1975 { NULL, 0, 0, 0, 0 }
1978 static const struct bfd_elf_special_section special_sections_f[] =
1980 { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
1981 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
1982 { NULL, 0, 0, 0, 0 }
1985 static const struct bfd_elf_special_section special_sections_g[] =
1987 { STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1988 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1989 { STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym, 0 },
1990 { STRING_COMMA_LEN (".gnu.version_d"), 0, SHT_GNU_verdef, 0 },
1991 { STRING_COMMA_LEN (".gnu.version_r"), 0, SHT_GNU_verneed, 0 },
1992 { STRING_COMMA_LEN (".gnu.liblist"), 0, SHT_GNU_LIBLIST, SHF_ALLOC },
1993 { STRING_COMMA_LEN (".gnu.conflict"), 0, SHT_RELA, SHF_ALLOC },
1994 { STRING_COMMA_LEN (".gnu.hash"), 0, SHT_GNU_HASH, SHF_ALLOC },
1995 { NULL, 0, 0, 0, 0 }
1998 static const struct bfd_elf_special_section special_sections_h[] =
2000 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, SHF_ALLOC },
2001 { NULL, 0, 0, 0, 0 }
2004 static const struct bfd_elf_special_section special_sections_i[] =
2006 { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2007 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2008 { STRING_COMMA_LEN (".interp"), 0, SHT_PROGBITS, 0 },
2009 { NULL, 0, 0, 0, 0 }
2012 static const struct bfd_elf_special_section special_sections_l[] =
2014 { STRING_COMMA_LEN (".line"), 0, SHT_PROGBITS, 0 },
2015 { NULL, 0, 0, 0, 0 }
2018 static const struct bfd_elf_special_section special_sections_n[] =
2020 { STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS, 0 },
2021 { STRING_COMMA_LEN (".note"), -1, SHT_NOTE, 0 },
2022 { NULL, 0, 0, 0, 0 }
2025 static const struct bfd_elf_special_section special_sections_p[] =
2027 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2028 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2029 { NULL, 0, 0, 0, 0 }
2032 static const struct bfd_elf_special_section special_sections_r[] =
2034 { STRING_COMMA_LEN (".rodata"), -2, SHT_PROGBITS, SHF_ALLOC },
2035 { STRING_COMMA_LEN (".rodata1"), 0, SHT_PROGBITS, SHF_ALLOC },
2036 { STRING_COMMA_LEN (".rela"), -1, SHT_RELA, 0 },
2037 { STRING_COMMA_LEN (".rel"), -1, SHT_REL, 0 },
2038 { NULL, 0, 0, 0, 0 }
2041 static const struct bfd_elf_special_section special_sections_s[] =
2043 { STRING_COMMA_LEN (".shstrtab"), 0, SHT_STRTAB, 0 },
2044 { STRING_COMMA_LEN (".strtab"), 0, SHT_STRTAB, 0 },
2045 { STRING_COMMA_LEN (".symtab"), 0, SHT_SYMTAB, 0 },
2046 /* See struct bfd_elf_special_section declaration for the semantics of
2047 this special case where .prefix_length != strlen (.prefix). */
2048 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2049 { NULL, 0, 0, 0, 0 }
2052 static const struct bfd_elf_special_section special_sections_t[] =
2054 { STRING_COMMA_LEN (".text"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2055 { STRING_COMMA_LEN (".tbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2056 { STRING_COMMA_LEN (".tdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2057 { NULL, 0, 0, 0, 0 }
2060 static const struct bfd_elf_special_section *special_sections[] =
2062 special_sections_b, /* 'b' */
2063 special_sections_c, /* 'b' */
2064 special_sections_d, /* 'd' */
2066 special_sections_f, /* 'f' */
2067 special_sections_g, /* 'g' */
2068 special_sections_h, /* 'h' */
2069 special_sections_i, /* 'i' */
2072 special_sections_l, /* 'l' */
2074 special_sections_n, /* 'n' */
2076 special_sections_p, /* 'p' */
2078 special_sections_r, /* 'r' */
2079 special_sections_s, /* 's' */
2080 special_sections_t, /* 't' */
2083 const struct bfd_elf_special_section *
2084 _bfd_elf_get_special_section (const char *name,
2085 const struct bfd_elf_special_section *spec,
2091 len = strlen (name);
2093 for (i = 0; spec[i].prefix != NULL; i++)
2096 int prefix_len = spec[i].prefix_length;
2098 if (len < prefix_len)
2100 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2103 suffix_len = spec[i].suffix_length;
2104 if (suffix_len <= 0)
2106 if (name[prefix_len] != 0)
2108 if (suffix_len == 0)
2110 if (name[prefix_len] != '.'
2111 && (suffix_len == -2
2112 || (rela && spec[i].type == SHT_REL)))
2118 if (len < prefix_len + suffix_len)
2120 if (memcmp (name + len - suffix_len,
2121 spec[i].prefix + prefix_len,
2131 const struct bfd_elf_special_section *
2132 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2135 const struct bfd_elf_special_section *spec;
2136 const struct elf_backend_data *bed;
2138 /* See if this is one of the special sections. */
2139 if (sec->name == NULL)
2142 bed = get_elf_backend_data (abfd);
2143 spec = bed->special_sections;
2146 spec = _bfd_elf_get_special_section (sec->name,
2147 bed->special_sections,
2153 if (sec->name[0] != '.')
2156 i = sec->name[1] - 'b';
2157 if (i < 0 || i > 't' - 'b')
2160 spec = special_sections[i];
2165 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2169 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2171 struct bfd_elf_section_data *sdata;
2172 const struct elf_backend_data *bed;
2173 const struct bfd_elf_special_section *ssect;
2175 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2178 sdata = bfd_zalloc (abfd, sizeof (*sdata));
2181 sec->used_by_bfd = sdata;
2184 /* Indicate whether or not this section should use RELA relocations. */
2185 bed = get_elf_backend_data (abfd);
2186 sec->use_rela_p = bed->default_use_rela_p;
2188 /* When we read a file, we don't need to set ELF section type and
2189 flags. They will be overridden in _bfd_elf_make_section_from_shdr
2190 anyway. We will set ELF section type and flags for all linker
2191 created sections. If user specifies BFD section flags, we will
2192 set ELF section type and flags based on BFD section flags in
2193 elf_fake_sections. */
2194 if ((!sec->flags && abfd->direction != read_direction)
2195 || (sec->flags & SEC_LINKER_CREATED) != 0)
2197 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2200 elf_section_type (sec) = ssect->type;
2201 elf_section_flags (sec) = ssect->attr;
2205 return _bfd_generic_new_section_hook (abfd, sec);
2208 /* Create a new bfd section from an ELF program header.
2210 Since program segments have no names, we generate a synthetic name
2211 of the form segment<NUM>, where NUM is generally the index in the
2212 program header table. For segments that are split (see below) we
2213 generate the names segment<NUM>a and segment<NUM>b.
2215 Note that some program segments may have a file size that is different than
2216 (less than) the memory size. All this means is that at execution the
2217 system must allocate the amount of memory specified by the memory size,
2218 but only initialize it with the first "file size" bytes read from the
2219 file. This would occur for example, with program segments consisting
2220 of combined data+bss.
2222 To handle the above situation, this routine generates TWO bfd sections
2223 for the single program segment. The first has the length specified by
2224 the file size of the segment, and the second has the length specified
2225 by the difference between the two sizes. In effect, the segment is split
2226 into its initialized and uninitialized parts.
2231 _bfd_elf_make_section_from_phdr (bfd *abfd,
2232 Elf_Internal_Phdr *hdr,
2234 const char *typename)
2242 split = ((hdr->p_memsz > 0)
2243 && (hdr->p_filesz > 0)
2244 && (hdr->p_memsz > hdr->p_filesz));
2246 if (hdr->p_filesz > 0)
2248 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
2249 len = strlen (namebuf) + 1;
2250 name = bfd_alloc (abfd, len);
2253 memcpy (name, namebuf, len);
2254 newsect = bfd_make_section (abfd, name);
2255 if (newsect == NULL)
2257 newsect->vma = hdr->p_vaddr;
2258 newsect->lma = hdr->p_paddr;
2259 newsect->size = hdr->p_filesz;
2260 newsect->filepos = hdr->p_offset;
2261 newsect->flags |= SEC_HAS_CONTENTS;
2262 newsect->alignment_power = bfd_log2 (hdr->p_align);
2263 if (hdr->p_type == PT_LOAD)
2265 newsect->flags |= SEC_ALLOC;
2266 newsect->flags |= SEC_LOAD;
2267 if (hdr->p_flags & PF_X)
2269 /* FIXME: all we known is that it has execute PERMISSION,
2271 newsect->flags |= SEC_CODE;
2274 if (!(hdr->p_flags & PF_W))
2276 newsect->flags |= SEC_READONLY;
2280 if (hdr->p_memsz > hdr->p_filesz)
2284 sprintf (namebuf, "%s%d%s", typename, index, split ? "b" : "");
2285 len = strlen (namebuf) + 1;
2286 name = 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 + hdr->p_filesz;
2294 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2295 newsect->size = hdr->p_memsz - hdr->p_filesz;
2296 newsect->filepos = hdr->p_offset + hdr->p_filesz;
2297 align = newsect->vma & -newsect->vma;
2298 if (align == 0 || align > hdr->p_align)
2299 align = hdr->p_align;
2300 newsect->alignment_power = bfd_log2 (align);
2301 if (hdr->p_type == PT_LOAD)
2303 /* Hack for gdb. Segments that have not been modified do
2304 not have their contents written to a core file, on the
2305 assumption that a debugger can find the contents in the
2306 executable. We flag this case by setting the fake
2307 section size to zero. Note that "real" bss sections will
2308 always have their contents dumped to the core file. */
2309 if (bfd_get_format (abfd) == bfd_core)
2311 newsect->flags |= SEC_ALLOC;
2312 if (hdr->p_flags & PF_X)
2313 newsect->flags |= SEC_CODE;
2315 if (!(hdr->p_flags & PF_W))
2316 newsect->flags |= SEC_READONLY;
2323 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int index)
2325 const struct elf_backend_data *bed;
2327 switch (hdr->p_type)
2330 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2333 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2336 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2339 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2342 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
2344 if (! elfcore_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2349 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2352 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2354 case PT_GNU_EH_FRAME:
2355 return _bfd_elf_make_section_from_phdr (abfd, hdr, index,
2359 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack");
2362 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "relro");
2365 /* Check for any processor-specific program segment types. */
2366 bed = get_elf_backend_data (abfd);
2367 return bed->elf_backend_section_from_phdr (abfd, hdr, index, "proc");
2371 /* Initialize REL_HDR, the section-header for new section, containing
2372 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2373 relocations; otherwise, we use REL relocations. */
2376 _bfd_elf_init_reloc_shdr (bfd *abfd,
2377 Elf_Internal_Shdr *rel_hdr,
2379 bfd_boolean use_rela_p)
2382 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2383 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2385 name = bfd_alloc (abfd, amt);
2388 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2390 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2392 if (rel_hdr->sh_name == (unsigned int) -1)
2394 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2395 rel_hdr->sh_entsize = (use_rela_p
2396 ? bed->s->sizeof_rela
2397 : bed->s->sizeof_rel);
2398 rel_hdr->sh_addralign = 1 << bed->s->log_file_align;
2399 rel_hdr->sh_flags = 0;
2400 rel_hdr->sh_addr = 0;
2401 rel_hdr->sh_size = 0;
2402 rel_hdr->sh_offset = 0;
2407 /* Set up an ELF internal section header for a section. */
2410 elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg)
2412 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2413 bfd_boolean *failedptr = failedptrarg;
2414 Elf_Internal_Shdr *this_hdr;
2415 unsigned int sh_type;
2419 /* We already failed; just get out of the bfd_map_over_sections
2424 this_hdr = &elf_section_data (asect)->this_hdr;
2426 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2427 asect->name, FALSE);
2428 if (this_hdr->sh_name == (unsigned int) -1)
2434 /* Don't clear sh_flags. Assembler may set additional bits. */
2436 if ((asect->flags & SEC_ALLOC) != 0
2437 || asect->user_set_vma)
2438 this_hdr->sh_addr = asect->vma;
2440 this_hdr->sh_addr = 0;
2442 this_hdr->sh_offset = 0;
2443 this_hdr->sh_size = asect->size;
2444 this_hdr->sh_link = 0;
2445 this_hdr->sh_addralign = 1 << asect->alignment_power;
2446 /* The sh_entsize and sh_info fields may have been set already by
2447 copy_private_section_data. */
2449 this_hdr->bfd_section = asect;
2450 this_hdr->contents = NULL;
2452 /* If the section type is unspecified, we set it based on
2454 if (this_hdr->sh_type == SHT_NULL)
2456 if ((asect->flags & SEC_GROUP) != 0)
2457 this_hdr->sh_type = SHT_GROUP;
2458 else if ((asect->flags & SEC_ALLOC) != 0
2459 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2460 || (asect->flags & SEC_NEVER_LOAD) != 0))
2461 this_hdr->sh_type = SHT_NOBITS;
2463 this_hdr->sh_type = SHT_PROGBITS;
2466 switch (this_hdr->sh_type)
2472 case SHT_INIT_ARRAY:
2473 case SHT_FINI_ARRAY:
2474 case SHT_PREINIT_ARRAY:
2481 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2485 this_hdr->sh_entsize = bed->s->sizeof_sym;
2489 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2493 if (get_elf_backend_data (abfd)->may_use_rela_p)
2494 this_hdr->sh_entsize = bed->s->sizeof_rela;
2498 if (get_elf_backend_data (abfd)->may_use_rel_p)
2499 this_hdr->sh_entsize = bed->s->sizeof_rel;
2502 case SHT_GNU_versym:
2503 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2506 case SHT_GNU_verdef:
2507 this_hdr->sh_entsize = 0;
2508 /* objcopy or strip will copy over sh_info, but may not set
2509 cverdefs. The linker will set cverdefs, but sh_info will be
2511 if (this_hdr->sh_info == 0)
2512 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2514 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2515 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2518 case SHT_GNU_verneed:
2519 this_hdr->sh_entsize = 0;
2520 /* objcopy or strip will copy over sh_info, but may not set
2521 cverrefs. The linker will set cverrefs, but sh_info will be
2523 if (this_hdr->sh_info == 0)
2524 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2526 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2527 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2531 this_hdr->sh_entsize = GRP_ENTRY_SIZE;
2535 this_hdr->sh_entsize = bed->s->arch_size == 64 ? 0 : 4;
2539 if ((asect->flags & SEC_ALLOC) != 0)
2540 this_hdr->sh_flags |= SHF_ALLOC;
2541 if ((asect->flags & SEC_READONLY) == 0)
2542 this_hdr->sh_flags |= SHF_WRITE;
2543 if ((asect->flags & SEC_CODE) != 0)
2544 this_hdr->sh_flags |= SHF_EXECINSTR;
2545 if ((asect->flags & SEC_MERGE) != 0)
2547 this_hdr->sh_flags |= SHF_MERGE;
2548 this_hdr->sh_entsize = asect->entsize;
2549 if ((asect->flags & SEC_STRINGS) != 0)
2550 this_hdr->sh_flags |= SHF_STRINGS;
2552 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2553 this_hdr->sh_flags |= SHF_GROUP;
2554 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2556 this_hdr->sh_flags |= SHF_TLS;
2557 if (asect->size == 0
2558 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2560 struct bfd_link_order *o = asect->map_tail.link_order;
2562 this_hdr->sh_size = 0;
2565 this_hdr->sh_size = o->offset + o->size;
2566 if (this_hdr->sh_size != 0)
2567 this_hdr->sh_type = SHT_NOBITS;
2572 /* Check for processor-specific section types. */
2573 sh_type = this_hdr->sh_type;
2574 if (bed->elf_backend_fake_sections
2575 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2578 if (sh_type == SHT_NOBITS && asect->size != 0)
2580 /* Don't change the header type from NOBITS if we are being
2581 called for objcopy --only-keep-debug. */
2582 this_hdr->sh_type = sh_type;
2585 /* If the section has relocs, set up a section header for the
2586 SHT_REL[A] section. If two relocation sections are required for
2587 this section, it is up to the processor-specific back-end to
2588 create the other. */
2589 if ((asect->flags & SEC_RELOC) != 0
2590 && !_bfd_elf_init_reloc_shdr (abfd,
2591 &elf_section_data (asect)->rel_hdr,
2597 /* Fill in the contents of a SHT_GROUP section. */
2600 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2602 bfd_boolean *failedptr = failedptrarg;
2603 unsigned long symindx;
2604 asection *elt, *first;
2608 /* Ignore linker created group section. See elfNN_ia64_object_p in
2610 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2615 if (elf_group_id (sec) != NULL)
2616 symindx = elf_group_id (sec)->udata.i;
2620 /* If called from the assembler, swap_out_syms will have set up
2621 elf_section_syms; If called for "ld -r", use target_index. */
2622 if (elf_section_syms (abfd) != NULL)
2623 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2625 symindx = sec->target_index;
2627 elf_section_data (sec)->this_hdr.sh_info = symindx;
2629 /* The contents won't be allocated for "ld -r" or objcopy. */
2631 if (sec->contents == NULL)
2634 sec->contents = bfd_alloc (abfd, sec->size);
2636 /* Arrange for the section to be written out. */
2637 elf_section_data (sec)->this_hdr.contents = sec->contents;
2638 if (sec->contents == NULL)
2645 loc = sec->contents + sec->size;
2647 /* Get the pointer to the first section in the group that gas
2648 squirreled away here. objcopy arranges for this to be set to the
2649 start of the input section group. */
2650 first = elt = elf_next_in_group (sec);
2652 /* First element is a flag word. Rest of section is elf section
2653 indices for all the sections of the group. Write them backwards
2654 just to keep the group in the same order as given in .section
2655 directives, not that it matters. */
2664 s = s->output_section;
2667 idx = elf_section_data (s)->this_idx;
2668 H_PUT_32 (abfd, idx, loc);
2669 elt = elf_next_in_group (elt);
2674 if ((loc -= 4) != sec->contents)
2677 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2680 /* Assign all ELF section numbers. The dummy first section is handled here
2681 too. The link/info pointers for the standard section types are filled
2682 in here too, while we're at it. */
2685 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
2687 struct elf_obj_tdata *t = elf_tdata (abfd);
2689 unsigned int section_number, secn;
2690 Elf_Internal_Shdr **i_shdrp;
2691 struct bfd_elf_section_data *d;
2695 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2697 /* SHT_GROUP sections are in relocatable files only. */
2698 if (link_info == NULL || link_info->relocatable)
2700 /* Put SHT_GROUP sections first. */
2701 for (sec = abfd->sections; sec != NULL; sec = sec->next)
2703 d = elf_section_data (sec);
2705 if (d->this_hdr.sh_type == SHT_GROUP)
2707 if (sec->flags & SEC_LINKER_CREATED)
2709 /* Remove the linker created SHT_GROUP sections. */
2710 bfd_section_list_remove (abfd, sec);
2711 abfd->section_count--;
2715 if (section_number == SHN_LORESERVE)
2716 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2717 d->this_idx = section_number++;
2723 for (sec = abfd->sections; sec; sec = sec->next)
2725 d = elf_section_data (sec);
2727 if (d->this_hdr.sh_type != SHT_GROUP)
2729 if (section_number == SHN_LORESERVE)
2730 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2731 d->this_idx = section_number++;
2733 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2734 if ((sec->flags & SEC_RELOC) == 0)
2738 if (section_number == SHN_LORESERVE)
2739 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2740 d->rel_idx = section_number++;
2741 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2746 if (section_number == SHN_LORESERVE)
2747 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2748 d->rel_idx2 = section_number++;
2749 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2755 if (section_number == SHN_LORESERVE)
2756 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2757 t->shstrtab_section = section_number++;
2758 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2759 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2761 if (bfd_get_symcount (abfd) > 0)
2763 if (section_number == SHN_LORESERVE)
2764 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2765 t->symtab_section = section_number++;
2766 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2767 if (section_number > SHN_LORESERVE - 2)
2769 if (section_number == SHN_LORESERVE)
2770 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2771 t->symtab_shndx_section = section_number++;
2772 t->symtab_shndx_hdr.sh_name
2773 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2774 ".symtab_shndx", FALSE);
2775 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2778 if (section_number == SHN_LORESERVE)
2779 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2780 t->strtab_section = section_number++;
2781 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2784 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2785 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2787 elf_numsections (abfd) = section_number;
2788 elf_elfheader (abfd)->e_shnum = section_number;
2789 if (section_number > SHN_LORESERVE)
2790 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
2792 /* Set up the list of section header pointers, in agreement with the
2794 i_shdrp = bfd_zalloc2 (abfd, section_number, sizeof (Elf_Internal_Shdr *));
2795 if (i_shdrp == NULL)
2798 i_shdrp[0] = bfd_zalloc (abfd, sizeof (Elf_Internal_Shdr));
2799 if (i_shdrp[0] == NULL)
2801 bfd_release (abfd, i_shdrp);
2805 elf_elfsections (abfd) = i_shdrp;
2807 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
2808 if (bfd_get_symcount (abfd) > 0)
2810 i_shdrp[t->symtab_section] = &t->symtab_hdr;
2811 if (elf_numsections (abfd) > SHN_LORESERVE)
2813 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
2814 t->symtab_shndx_hdr.sh_link = t->symtab_section;
2816 i_shdrp[t->strtab_section] = &t->strtab_hdr;
2817 t->symtab_hdr.sh_link = t->strtab_section;
2820 for (sec = abfd->sections; sec; sec = sec->next)
2822 struct bfd_elf_section_data *d = elf_section_data (sec);
2826 i_shdrp[d->this_idx] = &d->this_hdr;
2827 if (d->rel_idx != 0)
2828 i_shdrp[d->rel_idx] = &d->rel_hdr;
2829 if (d->rel_idx2 != 0)
2830 i_shdrp[d->rel_idx2] = d->rel_hdr2;
2832 /* Fill in the sh_link and sh_info fields while we're at it. */
2834 /* sh_link of a reloc section is the section index of the symbol
2835 table. sh_info is the section index of the section to which
2836 the relocation entries apply. */
2837 if (d->rel_idx != 0)
2839 d->rel_hdr.sh_link = t->symtab_section;
2840 d->rel_hdr.sh_info = d->this_idx;
2842 if (d->rel_idx2 != 0)
2844 d->rel_hdr2->sh_link = t->symtab_section;
2845 d->rel_hdr2->sh_info = d->this_idx;
2848 /* We need to set up sh_link for SHF_LINK_ORDER. */
2849 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
2851 s = elf_linked_to_section (sec);
2854 /* elf_linked_to_section points to the input section. */
2855 if (link_info != NULL)
2857 /* Check discarded linkonce section. */
2858 if (elf_discarded_section (s))
2861 (*_bfd_error_handler)
2862 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
2863 abfd, d->this_hdr.bfd_section,
2865 /* Point to the kept section if it has the same
2866 size as the discarded one. */
2867 kept = _bfd_elf_check_kept_section (s, link_info);
2870 bfd_set_error (bfd_error_bad_value);
2876 s = s->output_section;
2877 BFD_ASSERT (s != NULL);
2881 /* Handle objcopy. */
2882 if (s->output_section == NULL)
2884 (*_bfd_error_handler)
2885 (_("%B: sh_link of section `%A' points to removed section `%A' of `%B'"),
2886 abfd, d->this_hdr.bfd_section, s, s->owner);
2887 bfd_set_error (bfd_error_bad_value);
2890 s = s->output_section;
2892 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2897 The Intel C compiler generates SHT_IA_64_UNWIND with
2898 SHF_LINK_ORDER. But it doesn't set the sh_link or
2899 sh_info fields. Hence we could get the situation
2901 const struct elf_backend_data *bed
2902 = get_elf_backend_data (abfd);
2903 if (bed->link_order_error_handler)
2904 bed->link_order_error_handler
2905 (_("%B: warning: sh_link not set for section `%A'"),
2910 switch (d->this_hdr.sh_type)
2914 /* A reloc section which we are treating as a normal BFD
2915 section. sh_link is the section index of the symbol
2916 table. sh_info is the section index of the section to
2917 which the relocation entries apply. We assume that an
2918 allocated reloc section uses the dynamic symbol table.
2919 FIXME: How can we be sure? */
2920 s = bfd_get_section_by_name (abfd, ".dynsym");
2922 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2924 /* We look up the section the relocs apply to by name. */
2926 if (d->this_hdr.sh_type == SHT_REL)
2930 s = bfd_get_section_by_name (abfd, name);
2932 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
2936 /* We assume that a section named .stab*str is a stabs
2937 string section. We look for a section with the same name
2938 but without the trailing ``str'', and set its sh_link
2939 field to point to this section. */
2940 if (CONST_STRNEQ (sec->name, ".stab")
2941 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
2946 len = strlen (sec->name);
2947 alc = bfd_malloc (len - 2);
2950 memcpy (alc, sec->name, len - 3);
2951 alc[len - 3] = '\0';
2952 s = bfd_get_section_by_name (abfd, alc);
2956 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
2958 /* This is a .stab section. */
2959 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
2960 elf_section_data (s)->this_hdr.sh_entsize
2961 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
2968 case SHT_GNU_verneed:
2969 case SHT_GNU_verdef:
2970 /* sh_link is the section header index of the string table
2971 used for the dynamic entries, or the symbol table, or the
2973 s = bfd_get_section_by_name (abfd, ".dynstr");
2975 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2978 case SHT_GNU_LIBLIST:
2979 /* sh_link is the section header index of the prelink library
2980 list used for the dynamic entries, or the symbol table, or
2981 the version strings. */
2982 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
2983 ? ".dynstr" : ".gnu.libstr");
2985 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2990 case SHT_GNU_versym:
2991 /* sh_link is the section header index of the symbol table
2992 this hash table or version table is for. */
2993 s = bfd_get_section_by_name (abfd, ".dynsym");
2995 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2999 d->this_hdr.sh_link = t->symtab_section;
3003 for (secn = 1; secn < section_number; ++secn)
3004 if (i_shdrp[secn] == NULL)
3005 i_shdrp[secn] = i_shdrp[0];
3007 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3008 i_shdrp[secn]->sh_name);
3012 /* Map symbol from it's internal number to the external number, moving
3013 all local symbols to be at the head of the list. */
3016 sym_is_global (bfd *abfd, asymbol *sym)
3018 /* If the backend has a special mapping, use it. */
3019 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3020 if (bed->elf_backend_sym_is_global)
3021 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3023 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
3024 || bfd_is_und_section (bfd_get_section (sym))
3025 || bfd_is_com_section (bfd_get_section (sym)));
3028 /* Don't output section symbols for sections that are not going to be
3029 output. Also, don't output section symbols for reloc and other
3030 special sections. */
3033 ignore_section_sym (bfd *abfd, asymbol *sym)
3035 return ((sym->flags & BSF_SECTION_SYM) != 0
3037 || (sym->section->owner != abfd
3038 && (sym->section->output_section->owner != abfd
3039 || sym->section->output_offset != 0))));
3043 elf_map_symbols (bfd *abfd)
3045 unsigned int symcount = bfd_get_symcount (abfd);
3046 asymbol **syms = bfd_get_outsymbols (abfd);
3047 asymbol **sect_syms;
3048 unsigned int num_locals = 0;
3049 unsigned int num_globals = 0;
3050 unsigned int num_locals2 = 0;
3051 unsigned int num_globals2 = 0;
3058 fprintf (stderr, "elf_map_symbols\n");
3062 for (asect = abfd->sections; asect; asect = asect->next)
3064 if (max_index < asect->index)
3065 max_index = asect->index;
3069 sect_syms = bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
3070 if (sect_syms == NULL)
3072 elf_section_syms (abfd) = sect_syms;
3073 elf_num_section_syms (abfd) = max_index;
3075 /* Init sect_syms entries for any section symbols we have already
3076 decided to output. */
3077 for (idx = 0; idx < symcount; idx++)
3079 asymbol *sym = syms[idx];
3081 if ((sym->flags & BSF_SECTION_SYM) != 0
3082 && !ignore_section_sym (abfd, sym))
3084 asection *sec = sym->section;
3086 if (sec->owner != abfd)
3087 sec = sec->output_section;
3089 sect_syms[sec->index] = syms[idx];
3093 /* Classify all of the symbols. */
3094 for (idx = 0; idx < symcount; idx++)
3096 if (ignore_section_sym (abfd, syms[idx]))
3098 if (!sym_is_global (abfd, syms[idx]))
3104 /* We will be adding a section symbol for each normal BFD section. Most
3105 sections will already have a section symbol in outsymbols, but
3106 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3107 at least in that case. */
3108 for (asect = abfd->sections; asect; asect = asect->next)
3110 if (sect_syms[asect->index] == NULL)
3112 if (!sym_is_global (abfd, asect->symbol))
3119 /* Now sort the symbols so the local symbols are first. */
3120 new_syms = bfd_alloc2 (abfd, num_locals + num_globals, sizeof (asymbol *));
3122 if (new_syms == NULL)
3125 for (idx = 0; idx < symcount; idx++)
3127 asymbol *sym = syms[idx];
3130 if (ignore_section_sym (abfd, sym))
3132 if (!sym_is_global (abfd, sym))
3135 i = num_locals + num_globals2++;
3137 sym->udata.i = i + 1;
3139 for (asect = abfd->sections; asect; asect = asect->next)
3141 if (sect_syms[asect->index] == NULL)
3143 asymbol *sym = asect->symbol;
3146 sect_syms[asect->index] = sym;
3147 if (!sym_is_global (abfd, sym))
3150 i = num_locals + num_globals2++;
3152 sym->udata.i = i + 1;
3156 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3158 elf_num_locals (abfd) = num_locals;
3159 elf_num_globals (abfd) = num_globals;
3163 /* Align to the maximum file alignment that could be required for any
3164 ELF data structure. */
3166 static inline file_ptr
3167 align_file_position (file_ptr off, int align)
3169 return (off + align - 1) & ~(align - 1);
3172 /* Assign a file position to a section, optionally aligning to the
3173 required section alignment. */
3176 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3184 al = i_shdrp->sh_addralign;
3186 offset = BFD_ALIGN (offset, al);
3188 i_shdrp->sh_offset = offset;
3189 if (i_shdrp->bfd_section != NULL)
3190 i_shdrp->bfd_section->filepos = offset;
3191 if (i_shdrp->sh_type != SHT_NOBITS)
3192 offset += i_shdrp->sh_size;
3196 /* Compute the file positions we are going to put the sections at, and
3197 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3198 is not NULL, this is being called by the ELF backend linker. */
3201 _bfd_elf_compute_section_file_positions (bfd *abfd,
3202 struct bfd_link_info *link_info)
3204 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3206 struct bfd_strtab_hash *strtab = NULL;
3207 Elf_Internal_Shdr *shstrtab_hdr;
3209 if (abfd->output_has_begun)
3212 /* Do any elf backend specific processing first. */
3213 if (bed->elf_backend_begin_write_processing)
3214 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3216 if (! prep_headers (abfd))
3219 /* Post process the headers if necessary. */
3220 if (bed->elf_backend_post_process_headers)
3221 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3224 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3228 if (!assign_section_numbers (abfd, link_info))
3231 /* The backend linker builds symbol table information itself. */
3232 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3234 /* Non-zero if doing a relocatable link. */
3235 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3237 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3241 if (link_info == NULL)
3243 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3248 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3249 /* sh_name was set in prep_headers. */
3250 shstrtab_hdr->sh_type = SHT_STRTAB;
3251 shstrtab_hdr->sh_flags = 0;
3252 shstrtab_hdr->sh_addr = 0;
3253 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3254 shstrtab_hdr->sh_entsize = 0;
3255 shstrtab_hdr->sh_link = 0;
3256 shstrtab_hdr->sh_info = 0;
3257 /* sh_offset is set in assign_file_positions_except_relocs. */
3258 shstrtab_hdr->sh_addralign = 1;
3260 if (!assign_file_positions_except_relocs (abfd, link_info))
3263 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3266 Elf_Internal_Shdr *hdr;
3268 off = elf_tdata (abfd)->next_file_pos;
3270 hdr = &elf_tdata (abfd)->symtab_hdr;
3271 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3273 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3274 if (hdr->sh_size != 0)
3275 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3277 hdr = &elf_tdata (abfd)->strtab_hdr;
3278 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3280 elf_tdata (abfd)->next_file_pos = off;
3282 /* Now that we know where the .strtab section goes, write it
3284 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3285 || ! _bfd_stringtab_emit (abfd, strtab))
3287 _bfd_stringtab_free (strtab);
3290 abfd->output_has_begun = TRUE;
3295 /* Make an initial estimate of the size of the program header. If we
3296 get the number wrong here, we'll redo section placement. */
3298 static bfd_size_type
3299 get_program_header_size (bfd *abfd, struct bfd_link_info *info)
3303 const struct elf_backend_data *bed;
3305 /* Assume we will need exactly two PT_LOAD segments: one for text
3306 and one for data. */
3309 s = bfd_get_section_by_name (abfd, ".interp");
3310 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3312 /* If we have a loadable interpreter section, we need a
3313 PT_INTERP segment. In this case, assume we also need a
3314 PT_PHDR segment, although that may not be true for all
3319 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
3321 /* We need a PT_DYNAMIC segment. */
3324 if (elf_tdata (abfd)->relro)
3326 /* We need a PT_GNU_RELRO segment only when there is a
3327 PT_DYNAMIC segment. */
3332 if (elf_tdata (abfd)->eh_frame_hdr)
3334 /* We need a PT_GNU_EH_FRAME segment. */
3338 if (elf_tdata (abfd)->stack_flags)
3340 /* We need a PT_GNU_STACK segment. */
3344 for (s = abfd->sections; s != NULL; s = s->next)
3346 if ((s->flags & SEC_LOAD) != 0
3347 && CONST_STRNEQ (s->name, ".note"))
3349 /* We need a PT_NOTE segment. */
3351 /* Try to create just one PT_NOTE segment
3352 for all adjacent loadable .note* sections.
3353 gABI requires that within a PT_NOTE segment
3354 (and also inside of each SHT_NOTE section)
3355 each note is padded to a multiple of 4 size,
3356 so we check whether the sections are correctly
3358 if (s->alignment_power == 2)
3359 while (s->next != NULL
3360 && s->next->alignment_power == 2
3361 && (s->next->flags & SEC_LOAD) != 0
3362 && CONST_STRNEQ (s->next->name, ".note"))
3367 for (s = abfd->sections; s != NULL; s = s->next)
3369 if (s->flags & SEC_THREAD_LOCAL)
3371 /* We need a PT_TLS segment. */
3377 /* Let the backend count up any program headers it might need. */
3378 bed = get_elf_backend_data (abfd);
3379 if (bed->elf_backend_additional_program_headers)
3383 a = (*bed->elf_backend_additional_program_headers) (abfd, info);
3389 return segs * bed->s->sizeof_phdr;
3392 /* Create a mapping from a set of sections to a program segment. */
3394 static struct elf_segment_map *
3395 make_mapping (bfd *abfd,
3396 asection **sections,
3401 struct elf_segment_map *m;
3406 amt = sizeof (struct elf_segment_map);
3407 amt += (to - from - 1) * sizeof (asection *);
3408 m = bfd_zalloc (abfd, amt);
3412 m->p_type = PT_LOAD;
3413 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3414 m->sections[i - from] = *hdrpp;
3415 m->count = to - from;
3417 if (from == 0 && phdr)
3419 /* Include the headers in the first PT_LOAD segment. */
3420 m->includes_filehdr = 1;
3421 m->includes_phdrs = 1;
3427 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3430 struct elf_segment_map *
3431 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3433 struct elf_segment_map *m;
3435 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3439 m->p_type = PT_DYNAMIC;
3441 m->sections[0] = dynsec;
3446 /* Possibly add or remove segments from the segment map. */
3449 elf_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
3451 struct elf_segment_map **m;
3452 const struct elf_backend_data *bed;
3454 /* The placement algorithm assumes that non allocated sections are
3455 not in PT_LOAD segments. We ensure this here by removing such
3456 sections from the segment map. We also remove excluded
3457 sections. Finally, any PT_LOAD segment without sections is
3459 m = &elf_tdata (abfd)->segment_map;
3462 unsigned int i, new_count;
3464 for (new_count = 0, i = 0; i < (*m)->count; i++)
3466 if (((*m)->sections[i]->flags & SEC_EXCLUDE) == 0
3467 && (((*m)->sections[i]->flags & SEC_ALLOC) != 0
3468 || (*m)->p_type != PT_LOAD))
3470 (*m)->sections[new_count] = (*m)->sections[i];
3474 (*m)->count = new_count;
3476 if ((*m)->p_type == PT_LOAD && (*m)->count == 0)
3482 bed = get_elf_backend_data (abfd);
3483 if (bed->elf_backend_modify_segment_map != NULL)
3485 if (!(*bed->elf_backend_modify_segment_map) (abfd, info))
3492 /* Set up a mapping from BFD sections to program segments. */
3495 _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
3498 struct elf_segment_map *m;
3499 asection **sections = NULL;
3500 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3502 if (elf_tdata (abfd)->segment_map == NULL
3503 && bfd_count_sections (abfd) != 0)
3507 struct elf_segment_map *mfirst;
3508 struct elf_segment_map **pm;
3511 unsigned int phdr_index;
3512 bfd_vma maxpagesize;
3514 bfd_boolean phdr_in_segment = TRUE;
3515 bfd_boolean writable;
3517 asection *first_tls = NULL;
3518 asection *dynsec, *eh_frame_hdr;
3521 /* Select the allocated sections, and sort them. */
3523 sections = bfd_malloc2 (bfd_count_sections (abfd), sizeof (asection *));
3524 if (sections == NULL)
3528 for (s = abfd->sections; s != NULL; s = s->next)
3530 if ((s->flags & SEC_ALLOC) != 0)
3536 BFD_ASSERT (i <= bfd_count_sections (abfd));
3539 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3541 /* Build the mapping. */
3546 /* If we have a .interp section, then create a PT_PHDR segment for
3547 the program headers and a PT_INTERP segment for the .interp
3549 s = bfd_get_section_by_name (abfd, ".interp");
3550 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3552 amt = sizeof (struct elf_segment_map);
3553 m = bfd_zalloc (abfd, amt);
3557 m->p_type = PT_PHDR;
3558 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3559 m->p_flags = PF_R | PF_X;
3560 m->p_flags_valid = 1;
3561 m->includes_phdrs = 1;
3566 amt = sizeof (struct elf_segment_map);
3567 m = bfd_zalloc (abfd, amt);
3571 m->p_type = PT_INTERP;
3579 /* Look through the sections. We put sections in the same program
3580 segment when the start of the second section can be placed within
3581 a few bytes of the end of the first section. */
3585 maxpagesize = bed->maxpagesize;
3587 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3589 && (dynsec->flags & SEC_LOAD) == 0)
3592 /* Deal with -Ttext or something similar such that the first section
3593 is not adjacent to the program headers. This is an
3594 approximation, since at this point we don't know exactly how many
3595 program headers we will need. */
3598 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
3600 if (phdr_size == (bfd_size_type) -1)
3601 phdr_size = get_program_header_size (abfd, info);
3602 if ((abfd->flags & D_PAGED) == 0
3603 || sections[0]->lma < phdr_size
3604 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3605 phdr_in_segment = FALSE;
3608 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3611 bfd_boolean new_segment;
3615 /* See if this section and the last one will fit in the same
3618 if (last_hdr == NULL)
3620 /* If we don't have a segment yet, then we don't need a new
3621 one (we build the last one after this loop). */
3622 new_segment = FALSE;
3624 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3626 /* If this section has a different relation between the
3627 virtual address and the load address, then we need a new
3631 else if (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
3632 < BFD_ALIGN (hdr->lma, maxpagesize))
3634 /* If putting this section in this segment would force us to
3635 skip a page in the segment, then we need a new segment. */
3638 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3639 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3641 /* We don't want to put a loadable section after a
3642 nonloadable section in the same segment.
3643 Consider .tbss sections as loadable for this purpose. */
3646 else if ((abfd->flags & D_PAGED) == 0)
3648 /* If the file is not demand paged, which means that we
3649 don't require the sections to be correctly aligned in the
3650 file, then there is no other reason for a new segment. */
3651 new_segment = FALSE;
3654 && (hdr->flags & SEC_READONLY) == 0
3655 && (((last_hdr->lma + last_size - 1)
3656 & ~(maxpagesize - 1))
3657 != (hdr->lma & ~(maxpagesize - 1))))
3659 /* We don't want to put a writable section in a read only
3660 segment, unless they are on the same page in memory
3661 anyhow. We already know that the last section does not
3662 bring us past the current section on the page, so the
3663 only case in which the new section is not on the same
3664 page as the previous section is when the previous section
3665 ends precisely on a page boundary. */
3670 /* Otherwise, we can use the same segment. */
3671 new_segment = FALSE;
3674 /* Allow interested parties a chance to override our decision. */
3675 if (last_hdr && info->callbacks->override_segment_assignment)
3676 new_segment = info->callbacks->override_segment_assignment (info, abfd, hdr, last_hdr, new_segment);
3680 if ((hdr->flags & SEC_READONLY) == 0)
3683 /* .tbss sections effectively have zero size. */
3684 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
3685 != SEC_THREAD_LOCAL)
3686 last_size = hdr->size;
3692 /* We need a new program segment. We must create a new program
3693 header holding all the sections from phdr_index until hdr. */
3695 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3702 if ((hdr->flags & SEC_READONLY) == 0)
3708 /* .tbss sections effectively have zero size. */
3709 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3710 last_size = hdr->size;
3714 phdr_in_segment = FALSE;
3717 /* Create a final PT_LOAD program segment. */
3718 if (last_hdr != NULL)
3720 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3728 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3731 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
3738 /* For each batch of consecutive loadable .note sections,
3739 add a PT_NOTE segment. We don't use bfd_get_section_by_name,
3740 because if we link together nonloadable .note sections and
3741 loadable .note sections, we will generate two .note sections
3742 in the output file. FIXME: Using names for section types is
3744 for (s = abfd->sections; s != NULL; s = s->next)
3746 if ((s->flags & SEC_LOAD) != 0
3747 && CONST_STRNEQ (s->name, ".note"))
3751 amt = sizeof (struct elf_segment_map);
3752 if (s->alignment_power == 2)
3753 for (s2 = s; s2->next != NULL; s2 = s2->next)
3755 if (s2->next->alignment_power == 2
3756 && (s2->next->flags & SEC_LOAD) != 0
3757 && CONST_STRNEQ (s2->next->name, ".note")
3758 && align_power (s2->vma + s2->size, 2)
3764 amt += (count - 1) * sizeof (asection *);
3765 m = bfd_zalloc (abfd, amt);
3769 m->p_type = PT_NOTE;
3773 m->sections[m->count - count--] = s;
3774 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
3777 m->sections[m->count - 1] = s;
3778 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
3782 if (s->flags & SEC_THREAD_LOCAL)
3790 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3795 amt = sizeof (struct elf_segment_map);
3796 amt += (tls_count - 1) * sizeof (asection *);
3797 m = bfd_zalloc (abfd, amt);
3802 m->count = tls_count;
3803 /* Mandated PF_R. */
3805 m->p_flags_valid = 1;
3806 for (i = 0; i < tls_count; ++i)
3808 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3809 m->sections[i] = first_tls;
3810 first_tls = first_tls->next;
3817 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3819 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3820 if (eh_frame_hdr != NULL
3821 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
3823 amt = sizeof (struct elf_segment_map);
3824 m = bfd_zalloc (abfd, amt);
3828 m->p_type = PT_GNU_EH_FRAME;
3830 m->sections[0] = eh_frame_hdr->output_section;
3836 if (elf_tdata (abfd)->stack_flags)
3838 amt = sizeof (struct elf_segment_map);
3839 m = bfd_zalloc (abfd, amt);
3843 m->p_type = PT_GNU_STACK;
3844 m->p_flags = elf_tdata (abfd)->stack_flags;
3845 m->p_flags_valid = 1;
3851 if (dynsec != NULL && elf_tdata (abfd)->relro)
3853 /* We make a PT_GNU_RELRO segment only when there is a
3854 PT_DYNAMIC segment. */
3855 amt = sizeof (struct elf_segment_map);
3856 m = bfd_zalloc (abfd, amt);
3860 m->p_type = PT_GNU_RELRO;
3862 m->p_flags_valid = 1;
3869 elf_tdata (abfd)->segment_map = mfirst;
3872 if (!elf_modify_segment_map (abfd, info))
3875 for (count = 0, m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3877 elf_tdata (abfd)->program_header_size = count * bed->s->sizeof_phdr;
3882 if (sections != NULL)
3887 /* Sort sections by address. */
3890 elf_sort_sections (const void *arg1, const void *arg2)
3892 const asection *sec1 = *(const asection **) arg1;
3893 const asection *sec2 = *(const asection **) arg2;
3894 bfd_size_type size1, size2;
3896 /* Sort by LMA first, since this is the address used to
3897 place the section into a segment. */
3898 if (sec1->lma < sec2->lma)
3900 else if (sec1->lma > sec2->lma)
3903 /* Then sort by VMA. Normally the LMA and the VMA will be
3904 the same, and this will do nothing. */
3905 if (sec1->vma < sec2->vma)
3907 else if (sec1->vma > sec2->vma)
3910 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3912 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3918 /* If the indicies are the same, do not return 0
3919 here, but continue to try the next comparison. */
3920 if (sec1->target_index - sec2->target_index != 0)
3921 return sec1->target_index - sec2->target_index;
3926 else if (TOEND (sec2))
3931 /* Sort by size, to put zero sized sections
3932 before others at the same address. */
3934 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
3935 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
3942 return sec1->target_index - sec2->target_index;
3945 /* Ian Lance Taylor writes:
3947 We shouldn't be using % with a negative signed number. That's just
3948 not good. We have to make sure either that the number is not
3949 negative, or that the number has an unsigned type. When the types
3950 are all the same size they wind up as unsigned. When file_ptr is a
3951 larger signed type, the arithmetic winds up as signed long long,
3954 What we're trying to say here is something like ``increase OFF by
3955 the least amount that will cause it to be equal to the VMA modulo
3957 /* In other words, something like:
3959 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3960 off_offset = off % bed->maxpagesize;
3961 if (vma_offset < off_offset)
3962 adjustment = vma_offset + bed->maxpagesize - off_offset;
3964 adjustment = vma_offset - off_offset;
3966 which can can be collapsed into the expression below. */
3969 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
3971 return ((vma - off) % maxpagesize);
3975 print_segment_map (const struct elf_segment_map *m)
3978 const char *pt = get_segment_type (m->p_type);
3983 if (m->p_type >= PT_LOPROC && m->p_type <= PT_HIPROC)
3984 sprintf (buf, "LOPROC+%7.7x",
3985 (unsigned int) (m->p_type - PT_LOPROC));
3986 else if (m->p_type >= PT_LOOS && m->p_type <= PT_HIOS)
3987 sprintf (buf, "LOOS+%7.7x",
3988 (unsigned int) (m->p_type - PT_LOOS));
3990 snprintf (buf, sizeof (buf), "%8.8x",
3991 (unsigned int) m->p_type);
3994 fprintf (stderr, "%s:", pt);
3995 for (j = 0; j < m->count; j++)
3996 fprintf (stderr, " %s", m->sections [j]->name);
4000 /* Assign file positions to the sections based on the mapping from
4001 sections to segments. This function also sets up some fields in
4005 assign_file_positions_for_load_sections (bfd *abfd,
4006 struct bfd_link_info *link_info)
4008 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4009 struct elf_segment_map *m;
4010 Elf_Internal_Phdr *phdrs;
4011 Elf_Internal_Phdr *p;
4013 bfd_size_type maxpagesize;
4017 if (link_info == NULL
4018 && !elf_modify_segment_map (abfd, link_info))
4022 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4025 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
4026 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
4027 elf_elfheader (abfd)->e_phnum = alloc;
4029 if (elf_tdata (abfd)->program_header_size == (bfd_size_type) -1)
4030 elf_tdata (abfd)->program_header_size = alloc * bed->s->sizeof_phdr;
4032 BFD_ASSERT (elf_tdata (abfd)->program_header_size
4033 >= alloc * bed->s->sizeof_phdr);
4037 elf_tdata (abfd)->next_file_pos = bed->s->sizeof_ehdr;
4041 phdrs = bfd_alloc2 (abfd, alloc, sizeof (Elf_Internal_Phdr));
4042 elf_tdata (abfd)->phdr = phdrs;
4047 if ((abfd->flags & D_PAGED) != 0)
4048 maxpagesize = bed->maxpagesize;
4050 off = bed->s->sizeof_ehdr;
4051 off += alloc * bed->s->sizeof_phdr;
4053 for (m = elf_tdata (abfd)->segment_map, p = phdrs, j = 0;
4055 m = m->next, p++, j++)
4059 bfd_boolean no_contents;
4061 /* If elf_segment_map is not from map_sections_to_segments, the
4062 sections may not be correctly ordered. NOTE: sorting should
4063 not be done to the PT_NOTE section of a corefile, which may
4064 contain several pseudo-sections artificially created by bfd.
4065 Sorting these pseudo-sections breaks things badly. */
4067 && !(elf_elfheader (abfd)->e_type == ET_CORE
4068 && m->p_type == PT_NOTE))
4069 qsort (m->sections, (size_t) m->count, sizeof (asection *),
4072 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4073 number of sections with contents contributing to both p_filesz
4074 and p_memsz, followed by a number of sections with no contents
4075 that just contribute to p_memsz. In this loop, OFF tracks next
4076 available file offset for PT_LOAD and PT_NOTE segments. */
4077 p->p_type = m->p_type;
4078 p->p_flags = m->p_flags;
4083 p->p_vaddr = m->sections[0]->vma - m->p_vaddr_offset;
4085 if (m->p_paddr_valid)
4086 p->p_paddr = m->p_paddr;
4087 else if (m->count == 0)
4090 p->p_paddr = m->sections[0]->lma - m->p_vaddr_offset;
4092 if (p->p_type == PT_LOAD
4093 && (abfd->flags & D_PAGED) != 0)
4095 /* p_align in demand paged PT_LOAD segments effectively stores
4096 the maximum page size. When copying an executable with
4097 objcopy, we set m->p_align from the input file. Use this
4098 value for maxpagesize rather than bed->maxpagesize, which
4099 may be different. Note that we use maxpagesize for PT_TLS
4100 segment alignment later in this function, so we are relying
4101 on at least one PT_LOAD segment appearing before a PT_TLS
4103 if (m->p_align_valid)
4104 maxpagesize = m->p_align;
4106 p->p_align = maxpagesize;
4108 else if (m->count == 0)
4109 p->p_align = 1 << bed->s->log_file_align;
4110 else if (m->p_align_valid)
4111 p->p_align = m->p_align;
4115 no_contents = FALSE;
4117 if (p->p_type == PT_LOAD
4120 bfd_size_type align;
4121 unsigned int align_power = 0;
4123 if (m->p_align_valid)
4127 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4129 unsigned int secalign;
4131 secalign = bfd_get_section_alignment (abfd, *secpp);
4132 if (secalign > align_power)
4133 align_power = secalign;
4135 align = (bfd_size_type) 1 << align_power;
4136 if (align < maxpagesize)
4137 align = maxpagesize;
4140 for (i = 0; i < m->count; i++)
4141 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
4142 /* If we aren't making room for this section, then
4143 it must be SHT_NOBITS regardless of what we've
4144 set via struct bfd_elf_special_section. */
4145 elf_section_type (m->sections[i]) = SHT_NOBITS;
4147 /* Find out whether this segment contains any loadable
4148 sections. If the first section isn't loadable, the same
4149 holds for any other sections. */
4151 while (elf_section_type (m->sections[i]) == SHT_NOBITS)
4153 /* If a segment starts with .tbss, we need to look
4154 at the next section to decide whether the segment
4155 has any loadable sections. */
4156 if ((elf_section_flags (m->sections[i]) & SHF_TLS) == 0
4164 off_adjust = vma_page_aligned_bias (m->sections[0]->vma, off, align);
4168 /* We shouldn't need to align the segment on disk since
4169 the segment doesn't need file space, but the gABI
4170 arguably requires the alignment and glibc ld.so
4171 checks it. So to comply with the alignment
4172 requirement but not waste file space, we adjust
4173 p_offset for just this segment. (OFF_ADJUST is
4174 subtracted from OFF later.) This may put p_offset
4175 past the end of file, but that shouldn't matter. */
4180 /* Make sure the .dynamic section is the first section in the
4181 PT_DYNAMIC segment. */
4182 else if (p->p_type == PT_DYNAMIC
4184 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4187 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4189 bfd_set_error (bfd_error_bad_value);
4197 if (m->includes_filehdr)
4199 if (!m->p_flags_valid)
4201 p->p_filesz = bed->s->sizeof_ehdr;
4202 p->p_memsz = bed->s->sizeof_ehdr;
4205 BFD_ASSERT (p->p_type == PT_LOAD);
4207 if (p->p_vaddr < (bfd_vma) off)
4209 (*_bfd_error_handler)
4210 (_("%B: Not enough room for program headers, try linking with -N"),
4212 bfd_set_error (bfd_error_bad_value);
4217 if (!m->p_paddr_valid)
4222 if (m->includes_phdrs)
4224 if (!m->p_flags_valid)
4227 if (!m->includes_filehdr)
4229 p->p_offset = bed->s->sizeof_ehdr;
4233 BFD_ASSERT (p->p_type == PT_LOAD);
4234 p->p_vaddr -= off - p->p_offset;
4235 if (!m->p_paddr_valid)
4236 p->p_paddr -= off - p->p_offset;
4240 p->p_filesz += alloc * bed->s->sizeof_phdr;
4241 p->p_memsz += alloc * bed->s->sizeof_phdr;
4244 if (p->p_type == PT_LOAD
4245 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4247 if (!m->includes_filehdr && !m->includes_phdrs)
4253 adjust = off - (p->p_offset + p->p_filesz);
4255 p->p_filesz += adjust;
4256 p->p_memsz += adjust;
4260 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
4261 maps. Set filepos for sections in PT_LOAD segments, and in
4262 core files, for sections in PT_NOTE segments.
4263 assign_file_positions_for_non_load_sections will set filepos
4264 for other sections and update p_filesz for other segments. */
4265 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4268 bfd_size_type align;
4269 Elf_Internal_Shdr *this_hdr;
4272 this_hdr = &elf_section_data (sec)->this_hdr;
4273 align = (bfd_size_type) 1 << bfd_get_section_alignment (abfd, sec);
4275 if (p->p_type == PT_LOAD
4276 || p->p_type == PT_TLS)
4278 bfd_signed_vma adjust = sec->lma - (p->p_paddr + p->p_memsz);
4280 if (this_hdr->sh_type != SHT_NOBITS
4281 || ((this_hdr->sh_flags & SHF_ALLOC) != 0
4282 && ((this_hdr->sh_flags & SHF_TLS) == 0
4283 || p->p_type == PT_TLS)))
4287 (*_bfd_error_handler)
4288 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4289 abfd, sec, (unsigned long) sec->lma);
4292 p->p_memsz += adjust;
4294 if (this_hdr->sh_type != SHT_NOBITS)
4297 p->p_filesz += adjust;
4302 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4304 /* The section at i == 0 is the one that actually contains
4308 this_hdr->sh_offset = sec->filepos = off;
4309 off += this_hdr->sh_size;
4310 p->p_filesz = this_hdr->sh_size;
4316 /* The rest are fake sections that shouldn't be written. */
4325 if (p->p_type == PT_LOAD)
4327 this_hdr->sh_offset = sec->filepos = off;
4328 if (this_hdr->sh_type != SHT_NOBITS)
4329 off += this_hdr->sh_size;
4332 if (this_hdr->sh_type != SHT_NOBITS)
4334 p->p_filesz += this_hdr->sh_size;
4335 /* A load section without SHF_ALLOC is something like
4336 a note section in a PT_NOTE segment. These take
4337 file space but are not loaded into memory. */
4338 if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4339 p->p_memsz += this_hdr->sh_size;
4341 else if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4343 if (p->p_type == PT_TLS)
4344 p->p_memsz += this_hdr->sh_size;
4346 /* .tbss is special. It doesn't contribute to p_memsz of
4348 else if ((this_hdr->sh_flags & SHF_TLS) == 0)
4349 p->p_memsz += this_hdr->sh_size;
4352 if (p->p_type == PT_GNU_RELRO)
4354 else if (align > p->p_align
4355 && !m->p_align_valid
4356 && (p->p_type != PT_LOAD
4357 || (abfd->flags & D_PAGED) == 0))
4361 if (!m->p_flags_valid)
4364 if ((this_hdr->sh_flags & SHF_EXECINSTR) != 0)
4366 if ((this_hdr->sh_flags & SHF_WRITE) != 0)
4372 /* Check that all sections are in a PT_LOAD segment.
4373 Don't check funky gdb generated core files. */
4374 if (p->p_type == PT_LOAD && bfd_get_format (abfd) != bfd_core)
4375 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4377 Elf_Internal_Shdr *this_hdr;
4381 this_hdr = &(elf_section_data(sec)->this_hdr);
4382 if (this_hdr->sh_size != 0
4383 && !ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, p))
4385 (*_bfd_error_handler)
4386 (_("%B: section `%A' can't be allocated in segment %d"),
4388 print_segment_map (m);
4389 bfd_set_error (bfd_error_bad_value);
4395 elf_tdata (abfd)->next_file_pos = off;
4399 /* Assign file positions for the other sections. */
4402 assign_file_positions_for_non_load_sections (bfd *abfd,
4403 struct bfd_link_info *link_info)
4405 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4406 Elf_Internal_Shdr **i_shdrpp;
4407 Elf_Internal_Shdr **hdrpp;
4408 Elf_Internal_Phdr *phdrs;
4409 Elf_Internal_Phdr *p;
4410 struct elf_segment_map *m;
4411 bfd_vma filehdr_vaddr, filehdr_paddr;
4412 bfd_vma phdrs_vaddr, phdrs_paddr;
4414 unsigned int num_sec;
4418 i_shdrpp = elf_elfsections (abfd);
4419 num_sec = elf_numsections (abfd);
4420 off = elf_tdata (abfd)->next_file_pos;
4421 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4423 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4424 Elf_Internal_Shdr *hdr;
4427 if (hdr->bfd_section != NULL
4428 && (hdr->bfd_section->filepos != 0
4429 || (hdr->sh_type == SHT_NOBITS
4430 && hdr->contents == NULL)))
4431 BFD_ASSERT (hdr->sh_offset == hdr->bfd_section->filepos);
4432 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4434 if (hdr->sh_size != 0)
4435 ((*_bfd_error_handler)
4436 (_("%B: warning: allocated section `%s' not in segment"),
4438 (hdr->bfd_section == NULL
4440 : hdr->bfd_section->name)));
4441 /* We don't need to page align empty sections. */
4442 if ((abfd->flags & D_PAGED) != 0 && hdr->sh_size != 0)
4443 off += vma_page_aligned_bias (hdr->sh_addr, off,
4446 off += vma_page_aligned_bias (hdr->sh_addr, off,
4448 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4451 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4452 && hdr->bfd_section == NULL)
4453 || hdr == i_shdrpp[tdata->symtab_section]
4454 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4455 || hdr == i_shdrpp[tdata->strtab_section])
4456 hdr->sh_offset = -1;
4458 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4460 if (i == SHN_LORESERVE - 1)
4462 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4463 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4467 /* Now that we have set the section file positions, we can set up
4468 the file positions for the non PT_LOAD segments. */
4472 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4474 phdrs = elf_tdata (abfd)->phdr;
4475 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4480 if (p->p_type != PT_LOAD)
4483 if (m->includes_filehdr)
4485 filehdr_vaddr = p->p_vaddr;
4486 filehdr_paddr = p->p_paddr;
4488 if (m->includes_phdrs)
4490 phdrs_vaddr = p->p_vaddr;
4491 phdrs_paddr = p->p_paddr;
4492 if (m->includes_filehdr)
4494 phdrs_vaddr += bed->s->sizeof_ehdr;
4495 phdrs_paddr += bed->s->sizeof_ehdr;
4500 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4506 if (p->p_type != PT_LOAD
4507 && (p->p_type != PT_NOTE || bfd_get_format (abfd) != bfd_core))
4509 Elf_Internal_Shdr *hdr;
4510 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
4512 hdr = &elf_section_data (m->sections[m->count - 1])->this_hdr;
4513 p->p_filesz = (m->sections[m->count - 1]->filepos
4514 - m->sections[0]->filepos);
4515 if (hdr->sh_type != SHT_NOBITS)
4516 p->p_filesz += hdr->sh_size;
4518 p->p_offset = m->sections[0]->filepos;
4523 if (m->includes_filehdr)
4525 p->p_vaddr = filehdr_vaddr;
4526 if (! m->p_paddr_valid)
4527 p->p_paddr = filehdr_paddr;
4529 else if (m->includes_phdrs)
4531 p->p_vaddr = phdrs_vaddr;
4532 if (! m->p_paddr_valid)
4533 p->p_paddr = phdrs_paddr;
4535 else if (p->p_type == PT_GNU_RELRO)
4537 Elf_Internal_Phdr *lp;
4539 for (lp = phdrs; lp < phdrs + count; ++lp)
4541 if (lp->p_type == PT_LOAD
4542 && lp->p_vaddr <= link_info->relro_end
4543 && lp->p_vaddr >= link_info->relro_start
4544 && (lp->p_vaddr + lp->p_filesz
4545 >= link_info->relro_end))
4549 if (lp < phdrs + count
4550 && link_info->relro_end > lp->p_vaddr)
4552 p->p_vaddr = lp->p_vaddr;
4553 p->p_paddr = lp->p_paddr;
4554 p->p_offset = lp->p_offset;
4555 p->p_filesz = link_info->relro_end - lp->p_vaddr;
4556 p->p_memsz = p->p_filesz;
4558 p->p_flags = (lp->p_flags & ~PF_W);
4562 memset (p, 0, sizeof *p);
4563 p->p_type = PT_NULL;
4569 elf_tdata (abfd)->next_file_pos = off;
4574 /* Work out the file positions of all the sections. This is called by
4575 _bfd_elf_compute_section_file_positions. All the section sizes and
4576 VMAs must be known before this is called.
4578 Reloc sections come in two flavours: Those processed specially as
4579 "side-channel" data attached to a section to which they apply, and
4580 those that bfd doesn't process as relocations. The latter sort are
4581 stored in a normal bfd section by bfd_section_from_shdr. We don't
4582 consider the former sort here, unless they form part of the loadable
4583 image. Reloc sections not assigned here will be handled later by
4584 assign_file_positions_for_relocs.
4586 We also don't set the positions of the .symtab and .strtab here. */
4589 assign_file_positions_except_relocs (bfd *abfd,
4590 struct bfd_link_info *link_info)
4592 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4593 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4595 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4597 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4598 && bfd_get_format (abfd) != bfd_core)
4600 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4601 unsigned int num_sec = elf_numsections (abfd);
4602 Elf_Internal_Shdr **hdrpp;
4605 /* Start after the ELF header. */
4606 off = i_ehdrp->e_ehsize;
4608 /* We are not creating an executable, which means that we are
4609 not creating a program header, and that the actual order of
4610 the sections in the file is unimportant. */
4611 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4613 Elf_Internal_Shdr *hdr;
4616 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4617 && hdr->bfd_section == NULL)
4618 || i == tdata->symtab_section
4619 || i == tdata->symtab_shndx_section
4620 || i == tdata->strtab_section)
4622 hdr->sh_offset = -1;
4625 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4627 if (i == SHN_LORESERVE - 1)
4629 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4630 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4638 /* Assign file positions for the loaded sections based on the
4639 assignment of sections to segments. */
4640 if (!assign_file_positions_for_load_sections (abfd, link_info))
4643 /* And for non-load sections. */
4644 if (!assign_file_positions_for_non_load_sections (abfd, link_info))
4647 if (bed->elf_backend_modify_program_headers != NULL)
4649 if (!(*bed->elf_backend_modify_program_headers) (abfd, link_info))
4653 /* Write out the program headers. */
4654 alloc = tdata->program_header_size / bed->s->sizeof_phdr;
4655 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4656 || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
4659 off = tdata->next_file_pos;
4662 /* Place the section headers. */
4663 off = align_file_position (off, 1 << bed->s->log_file_align);
4664 i_ehdrp->e_shoff = off;
4665 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4667 tdata->next_file_pos = off;
4673 prep_headers (bfd *abfd)
4675 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4676 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4677 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
4678 struct elf_strtab_hash *shstrtab;
4679 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4681 i_ehdrp = elf_elfheader (abfd);
4682 i_shdrp = elf_elfsections (abfd);
4684 shstrtab = _bfd_elf_strtab_init ();
4685 if (shstrtab == NULL)
4688 elf_shstrtab (abfd) = shstrtab;
4690 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4691 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4692 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4693 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4695 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4696 i_ehdrp->e_ident[EI_DATA] =
4697 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4698 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4700 if ((abfd->flags & DYNAMIC) != 0)
4701 i_ehdrp->e_type = ET_DYN;
4702 else if ((abfd->flags & EXEC_P) != 0)
4703 i_ehdrp->e_type = ET_EXEC;
4704 else if (bfd_get_format (abfd) == bfd_core)
4705 i_ehdrp->e_type = ET_CORE;
4707 i_ehdrp->e_type = ET_REL;
4709 switch (bfd_get_arch (abfd))
4711 case bfd_arch_unknown:
4712 i_ehdrp->e_machine = EM_NONE;
4715 /* There used to be a long list of cases here, each one setting
4716 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4717 in the corresponding bfd definition. To avoid duplication,
4718 the switch was removed. Machines that need special handling
4719 can generally do it in elf_backend_final_write_processing(),
4720 unless they need the information earlier than the final write.
4721 Such need can generally be supplied by replacing the tests for
4722 e_machine with the conditions used to determine it. */
4724 i_ehdrp->e_machine = bed->elf_machine_code;
4727 i_ehdrp->e_version = bed->s->ev_current;
4728 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4730 /* No program header, for now. */
4731 i_ehdrp->e_phoff = 0;
4732 i_ehdrp->e_phentsize = 0;
4733 i_ehdrp->e_phnum = 0;
4735 /* Each bfd section is section header entry. */
4736 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4737 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4739 /* If we're building an executable, we'll need a program header table. */
4740 if (abfd->flags & EXEC_P)
4741 /* It all happens later. */
4745 i_ehdrp->e_phentsize = 0;
4747 i_ehdrp->e_phoff = 0;
4750 elf_tdata (abfd)->symtab_hdr.sh_name =
4751 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
4752 elf_tdata (abfd)->strtab_hdr.sh_name =
4753 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
4754 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4755 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
4756 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4757 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4758 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4764 /* Assign file positions for all the reloc sections which are not part
4765 of the loadable file image. */
4768 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
4771 unsigned int i, num_sec;
4772 Elf_Internal_Shdr **shdrpp;
4774 off = elf_tdata (abfd)->next_file_pos;
4776 num_sec = elf_numsections (abfd);
4777 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4779 Elf_Internal_Shdr *shdrp;
4782 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4783 && shdrp->sh_offset == -1)
4784 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
4787 elf_tdata (abfd)->next_file_pos = off;
4791 _bfd_elf_write_object_contents (bfd *abfd)
4793 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4794 Elf_Internal_Ehdr *i_ehdrp;
4795 Elf_Internal_Shdr **i_shdrp;
4797 unsigned int count, num_sec;
4799 if (! abfd->output_has_begun
4800 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
4803 i_shdrp = elf_elfsections (abfd);
4804 i_ehdrp = elf_elfheader (abfd);
4807 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
4811 _bfd_elf_assign_file_positions_for_relocs (abfd);
4813 /* After writing the headers, we need to write the sections too... */
4814 num_sec = elf_numsections (abfd);
4815 for (count = 1; count < num_sec; count++)
4817 if (bed->elf_backend_section_processing)
4818 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
4819 if (i_shdrp[count]->contents)
4821 bfd_size_type amt = i_shdrp[count]->sh_size;
4823 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
4824 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
4827 if (count == SHN_LORESERVE - 1)
4828 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4831 /* Write out the section header names. */
4832 if (elf_shstrtab (abfd) != NULL
4833 && (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
4834 || !_bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
4837 if (bed->elf_backend_final_write_processing)
4838 (*bed->elf_backend_final_write_processing) (abfd,
4839 elf_tdata (abfd)->linker);
4841 if (!bed->s->write_shdrs_and_ehdr (abfd))
4844 /* This is last since write_shdrs_and_ehdr can touch i_shdrp[0]. */
4845 if (elf_tdata (abfd)->after_write_object_contents)
4846 return (*elf_tdata (abfd)->after_write_object_contents) (abfd);
4852 _bfd_elf_write_corefile_contents (bfd *abfd)
4854 /* Hopefully this can be done just like an object file. */
4855 return _bfd_elf_write_object_contents (abfd);
4858 /* Given a section, search the header to find them. */
4861 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
4863 const struct elf_backend_data *bed;
4866 if (elf_section_data (asect) != NULL
4867 && elf_section_data (asect)->this_idx != 0)
4868 return elf_section_data (asect)->this_idx;
4870 if (bfd_is_abs_section (asect))
4872 else if (bfd_is_com_section (asect))
4874 else if (bfd_is_und_section (asect))
4879 bed = get_elf_backend_data (abfd);
4880 if (bed->elf_backend_section_from_bfd_section)
4884 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
4889 bfd_set_error (bfd_error_nonrepresentable_section);
4894 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4898 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
4900 asymbol *asym_ptr = *asym_ptr_ptr;
4902 flagword flags = asym_ptr->flags;
4904 /* When gas creates relocations against local labels, it creates its
4905 own symbol for the section, but does put the symbol into the
4906 symbol chain, so udata is 0. When the linker is generating
4907 relocatable output, this section symbol may be for one of the
4908 input sections rather than the output section. */
4909 if (asym_ptr->udata.i == 0
4910 && (flags & BSF_SECTION_SYM)
4911 && asym_ptr->section)
4916 sec = asym_ptr->section;
4917 if (sec->owner != abfd && sec->output_section != NULL)
4918 sec = sec->output_section;
4919 if (sec->owner == abfd
4920 && (indx = sec->index) < elf_num_section_syms (abfd)
4921 && elf_section_syms (abfd)[indx] != NULL)
4922 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
4925 idx = asym_ptr->udata.i;
4929 /* This case can occur when using --strip-symbol on a symbol
4930 which is used in a relocation entry. */
4931 (*_bfd_error_handler)
4932 (_("%B: symbol `%s' required but not present"),
4933 abfd, bfd_asymbol_name (asym_ptr));
4934 bfd_set_error (bfd_error_no_symbols);
4941 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4942 (long) asym_ptr, asym_ptr->name, idx, flags,
4943 elf_symbol_flags (flags));
4951 /* Rewrite program header information. */
4954 rewrite_elf_program_header (bfd *ibfd, bfd *obfd)
4956 Elf_Internal_Ehdr *iehdr;
4957 struct elf_segment_map *map;
4958 struct elf_segment_map *map_first;
4959 struct elf_segment_map **pointer_to_map;
4960 Elf_Internal_Phdr *segment;
4963 unsigned int num_segments;
4964 bfd_boolean phdr_included = FALSE;
4965 bfd_vma maxpagesize;
4966 struct elf_segment_map *phdr_adjust_seg = NULL;
4967 unsigned int phdr_adjust_num = 0;
4968 const struct elf_backend_data *bed;
4970 bed = get_elf_backend_data (ibfd);
4971 iehdr = elf_elfheader (ibfd);
4974 pointer_to_map = &map_first;
4976 num_segments = elf_elfheader (ibfd)->e_phnum;
4977 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
4979 /* Returns the end address of the segment + 1. */
4980 #define SEGMENT_END(segment, start) \
4981 (start + (segment->p_memsz > segment->p_filesz \
4982 ? segment->p_memsz : segment->p_filesz))
4984 #define SECTION_SIZE(section, segment) \
4985 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
4986 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
4987 ? section->size : 0)
4989 /* Returns TRUE if the given section is contained within
4990 the given segment. VMA addresses are compared. */
4991 #define IS_CONTAINED_BY_VMA(section, segment) \
4992 (section->vma >= segment->p_vaddr \
4993 && (section->vma + SECTION_SIZE (section, segment) \
4994 <= (SEGMENT_END (segment, segment->p_vaddr))))
4996 /* Returns TRUE if the given section is contained within
4997 the given segment. LMA addresses are compared. */
4998 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4999 (section->lma >= base \
5000 && (section->lma + SECTION_SIZE (section, segment) \
5001 <= SEGMENT_END (segment, base)))
5003 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
5004 #define IS_COREFILE_NOTE(p, s) \
5005 (p->p_type == PT_NOTE \
5006 && bfd_get_format (ibfd) == bfd_core \
5007 && s->vma == 0 && s->lma == 0 \
5008 && (bfd_vma) s->filepos >= p->p_offset \
5009 && ((bfd_vma) s->filepos + s->size \
5010 <= p->p_offset + p->p_filesz))
5012 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5013 linker, which generates a PT_INTERP section with p_vaddr and
5014 p_memsz set to 0. */
5015 #define IS_SOLARIS_PT_INTERP(p, s) \
5017 && p->p_paddr == 0 \
5018 && p->p_memsz == 0 \
5019 && p->p_filesz > 0 \
5020 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5022 && (bfd_vma) s->filepos >= p->p_offset \
5023 && ((bfd_vma) s->filepos + s->size \
5024 <= p->p_offset + p->p_filesz))
5026 /* Decide if the given section should be included in the given segment.
5027 A section will be included if:
5028 1. It is within the address space of the segment -- we use the LMA
5029 if that is set for the segment and the VMA otherwise,
5030 2. It is an allocated segment,
5031 3. There is an output section associated with it,
5032 4. The section has not already been allocated to a previous segment.
5033 5. PT_GNU_STACK segments do not include any sections.
5034 6. PT_TLS segment includes only SHF_TLS sections.
5035 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5036 8. PT_DYNAMIC should not contain empty sections at the beginning
5037 (with the possible exception of .dynamic). */
5038 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
5039 ((((segment->p_paddr \
5040 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5041 : IS_CONTAINED_BY_VMA (section, segment)) \
5042 && (section->flags & SEC_ALLOC) != 0) \
5043 || IS_COREFILE_NOTE (segment, section)) \
5044 && segment->p_type != PT_GNU_STACK \
5045 && (segment->p_type != PT_TLS \
5046 || (section->flags & SEC_THREAD_LOCAL)) \
5047 && (segment->p_type == PT_LOAD \
5048 || segment->p_type == PT_TLS \
5049 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5050 && (segment->p_type != PT_DYNAMIC \
5051 || SECTION_SIZE (section, segment) > 0 \
5052 || (segment->p_paddr \
5053 ? segment->p_paddr != section->lma \
5054 : segment->p_vaddr != section->vma) \
5055 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5057 && ! section->segment_mark)
5059 /* If the output section of a section in the input segment is NULL,
5060 it is removed from the corresponding output segment. */
5061 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5062 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
5063 && section->output_section != NULL)
5065 /* Returns TRUE iff seg1 starts after the end of seg2. */
5066 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5067 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5069 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5070 their VMA address ranges and their LMA address ranges overlap.
5071 It is possible to have overlapping VMA ranges without overlapping LMA
5072 ranges. RedBoot images for example can have both .data and .bss mapped
5073 to the same VMA range, but with the .data section mapped to a different
5075 #define SEGMENT_OVERLAPS(seg1, seg2) \
5076 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5077 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5078 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5079 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5081 /* Initialise the segment mark field. */
5082 for (section = ibfd->sections; section != NULL; section = section->next)
5083 section->segment_mark = FALSE;
5085 /* Scan through the segments specified in the program header
5086 of the input BFD. For this first scan we look for overlaps
5087 in the loadable segments. These can be created by weird
5088 parameters to objcopy. Also, fix some solaris weirdness. */
5089 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5094 Elf_Internal_Phdr *segment2;
5096 if (segment->p_type == PT_INTERP)
5097 for (section = ibfd->sections; section; section = section->next)
5098 if (IS_SOLARIS_PT_INTERP (segment, section))
5100 /* Mininal change so that the normal section to segment
5101 assignment code will work. */
5102 segment->p_vaddr = section->vma;
5106 if (segment->p_type != PT_LOAD)
5109 /* Determine if this segment overlaps any previous segments. */
5110 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
5112 bfd_signed_vma extra_length;
5114 if (segment2->p_type != PT_LOAD
5115 || ! SEGMENT_OVERLAPS (segment, segment2))
5118 /* Merge the two segments together. */
5119 if (segment2->p_vaddr < segment->p_vaddr)
5121 /* Extend SEGMENT2 to include SEGMENT and then delete
5124 SEGMENT_END (segment, segment->p_vaddr)
5125 - SEGMENT_END (segment2, segment2->p_vaddr);
5127 if (extra_length > 0)
5129 segment2->p_memsz += extra_length;
5130 segment2->p_filesz += extra_length;
5133 segment->p_type = PT_NULL;
5135 /* Since we have deleted P we must restart the outer loop. */
5137 segment = elf_tdata (ibfd)->phdr;
5142 /* Extend SEGMENT to include SEGMENT2 and then delete
5145 SEGMENT_END (segment2, segment2->p_vaddr)
5146 - SEGMENT_END (segment, segment->p_vaddr);
5148 if (extra_length > 0)
5150 segment->p_memsz += extra_length;
5151 segment->p_filesz += extra_length;
5154 segment2->p_type = PT_NULL;
5159 /* The second scan attempts to assign sections to segments. */
5160 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5164 unsigned int section_count;
5165 asection ** sections;
5166 asection * output_section;
5168 bfd_vma matching_lma;
5169 bfd_vma suggested_lma;
5172 asection * first_section;
5174 if (segment->p_type == PT_NULL)
5177 first_section = NULL;
5178 /* Compute how many sections might be placed into this segment. */
5179 for (section = ibfd->sections, section_count = 0;
5181 section = section->next)
5183 /* Find the first section in the input segment, which may be
5184 removed from the corresponding output segment. */
5185 if (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed))
5187 if (first_section == NULL)
5188 first_section = section;
5189 if (section->output_section != NULL)
5194 /* Allocate a segment map big enough to contain
5195 all of the sections we have selected. */
5196 amt = sizeof (struct elf_segment_map);
5197 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5198 map = bfd_zalloc (obfd, amt);
5202 /* Initialise the fields of the segment map. Default to
5203 using the physical address of the segment in the input BFD. */
5205 map->p_type = segment->p_type;
5206 map->p_flags = segment->p_flags;
5207 map->p_flags_valid = 1;
5209 /* If the first section in the input segment is removed, there is
5210 no need to preserve segment physical address in the corresponding
5212 if (!first_section || first_section->output_section != NULL)
5214 map->p_paddr = segment->p_paddr;
5215 map->p_paddr_valid = 1;
5218 /* Determine if this segment contains the ELF file header
5219 and if it contains the program headers themselves. */
5220 map->includes_filehdr = (segment->p_offset == 0
5221 && segment->p_filesz >= iehdr->e_ehsize);
5223 map->includes_phdrs = 0;
5225 if (! phdr_included || segment->p_type != PT_LOAD)
5227 map->includes_phdrs =
5228 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5229 && (segment->p_offset + segment->p_filesz
5230 >= ((bfd_vma) iehdr->e_phoff
5231 + iehdr->e_phnum * iehdr->e_phentsize)));
5233 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5234 phdr_included = TRUE;
5237 if (section_count == 0)
5239 /* Special segments, such as the PT_PHDR segment, may contain
5240 no sections, but ordinary, loadable segments should contain
5241 something. They are allowed by the ELF spec however, so only
5242 a warning is produced. */
5243 if (segment->p_type == PT_LOAD)
5244 (*_bfd_error_handler)
5245 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5249 *pointer_to_map = map;
5250 pointer_to_map = &map->next;
5255 /* Now scan the sections in the input BFD again and attempt
5256 to add their corresponding output sections to the segment map.
5257 The problem here is how to handle an output section which has
5258 been moved (ie had its LMA changed). There are four possibilities:
5260 1. None of the sections have been moved.
5261 In this case we can continue to use the segment LMA from the
5264 2. All of the sections have been moved by the same amount.
5265 In this case we can change the segment's LMA to match the LMA
5266 of the first section.
5268 3. Some of the sections have been moved, others have not.
5269 In this case those sections which have not been moved can be
5270 placed in the current segment which will have to have its size,
5271 and possibly its LMA changed, and a new segment or segments will
5272 have to be created to contain the other sections.
5274 4. The sections have been moved, but not by the same amount.
5275 In this case we can change the segment's LMA to match the LMA
5276 of the first section and we will have to create a new segment
5277 or segments to contain the other sections.
5279 In order to save time, we allocate an array to hold the section
5280 pointers that we are interested in. As these sections get assigned
5281 to a segment, they are removed from this array. */
5283 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5284 to work around this long long bug. */
5285 sections = bfd_malloc2 (section_count, sizeof (asection *));
5286 if (sections == NULL)
5289 /* Step One: Scan for segment vs section LMA conflicts.
5290 Also add the sections to the section array allocated above.
5291 Also add the sections to the current segment. In the common
5292 case, where the sections have not been moved, this means that
5293 we have completely filled the segment, and there is nothing
5299 for (j = 0, section = ibfd->sections;
5301 section = section->next)
5303 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5305 output_section = section->output_section;
5307 sections[j ++] = section;
5309 /* The Solaris native linker always sets p_paddr to 0.
5310 We try to catch that case here, and set it to the
5311 correct value. Note - some backends require that
5312 p_paddr be left as zero. */
5313 if (segment->p_paddr == 0
5314 && segment->p_vaddr != 0
5315 && (! bed->want_p_paddr_set_to_zero)
5317 && output_section->lma != 0
5318 && (output_section->vma == (segment->p_vaddr
5319 + (map->includes_filehdr
5322 + (map->includes_phdrs
5324 * iehdr->e_phentsize)
5326 map->p_paddr = segment->p_vaddr;
5328 /* Match up the physical address of the segment with the
5329 LMA address of the output section. */
5330 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5331 || IS_COREFILE_NOTE (segment, section)
5332 || (bed->want_p_paddr_set_to_zero &&
5333 IS_CONTAINED_BY_VMA (output_section, segment)))
5335 if (matching_lma == 0 || output_section->lma < matching_lma)
5336 matching_lma = output_section->lma;
5338 /* We assume that if the section fits within the segment
5339 then it does not overlap any other section within that
5341 map->sections[isec ++] = output_section;
5343 else if (suggested_lma == 0)
5344 suggested_lma = output_section->lma;
5348 BFD_ASSERT (j == section_count);
5350 /* Step Two: Adjust the physical address of the current segment,
5352 if (isec == section_count)
5354 /* All of the sections fitted within the segment as currently
5355 specified. This is the default case. Add the segment to
5356 the list of built segments and carry on to process the next
5357 program header in the input BFD. */
5358 map->count = section_count;
5359 *pointer_to_map = map;
5360 pointer_to_map = &map->next;
5362 if (matching_lma != map->p_paddr
5363 && !map->includes_filehdr && !map->includes_phdrs)
5364 /* There is some padding before the first section in the
5365 segment. So, we must account for that in the output
5367 map->p_vaddr_offset = matching_lma - map->p_paddr;
5374 if (matching_lma != 0)
5376 /* At least one section fits inside the current segment.
5377 Keep it, but modify its physical address to match the
5378 LMA of the first section that fitted. */
5379 map->p_paddr = matching_lma;
5383 /* None of the sections fitted inside the current segment.
5384 Change the current segment's physical address to match
5385 the LMA of the first section. */
5386 map->p_paddr = suggested_lma;
5389 /* Offset the segment physical address from the lma
5390 to allow for space taken up by elf headers. */
5391 if (map->includes_filehdr)
5392 map->p_paddr -= iehdr->e_ehsize;
5394 if (map->includes_phdrs)
5396 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5398 /* iehdr->e_phnum is just an estimate of the number
5399 of program headers that we will need. Make a note
5400 here of the number we used and the segment we chose
5401 to hold these headers, so that we can adjust the
5402 offset when we know the correct value. */
5403 phdr_adjust_num = iehdr->e_phnum;
5404 phdr_adjust_seg = map;
5408 /* Step Three: Loop over the sections again, this time assigning
5409 those that fit to the current segment and removing them from the
5410 sections array; but making sure not to leave large gaps. Once all
5411 possible sections have been assigned to the current segment it is
5412 added to the list of built segments and if sections still remain
5413 to be assigned, a new segment is constructed before repeating
5421 /* Fill the current segment with sections that fit. */
5422 for (j = 0; j < section_count; j++)
5424 section = sections[j];
5426 if (section == NULL)
5429 output_section = section->output_section;
5431 BFD_ASSERT (output_section != NULL);
5433 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5434 || IS_COREFILE_NOTE (segment, section))
5436 if (map->count == 0)
5438 /* If the first section in a segment does not start at
5439 the beginning of the segment, then something is
5441 if (output_section->lma !=
5443 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5444 + (map->includes_phdrs
5445 ? iehdr->e_phnum * iehdr->e_phentsize
5451 asection * prev_sec;
5453 prev_sec = map->sections[map->count - 1];
5455 /* If the gap between the end of the previous section
5456 and the start of this section is more than
5457 maxpagesize then we need to start a new segment. */
5458 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
5460 < BFD_ALIGN (output_section->lma, maxpagesize))
5461 || ((prev_sec->lma + prev_sec->size)
5462 > output_section->lma))
5464 if (suggested_lma == 0)
5465 suggested_lma = output_section->lma;
5471 map->sections[map->count++] = output_section;
5474 section->segment_mark = TRUE;
5476 else if (suggested_lma == 0)
5477 suggested_lma = output_section->lma;
5480 BFD_ASSERT (map->count > 0);
5482 /* Add the current segment to the list of built segments. */
5483 *pointer_to_map = map;
5484 pointer_to_map = &map->next;
5486 if (isec < section_count)
5488 /* We still have not allocated all of the sections to
5489 segments. Create a new segment here, initialise it
5490 and carry on looping. */
5491 amt = sizeof (struct elf_segment_map);
5492 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5493 map = bfd_alloc (obfd, amt);
5500 /* Initialise the fields of the segment map. Set the physical
5501 physical address to the LMA of the first section that has
5502 not yet been assigned. */
5504 map->p_type = segment->p_type;
5505 map->p_flags = segment->p_flags;
5506 map->p_flags_valid = 1;
5507 map->p_paddr = suggested_lma;
5508 map->p_paddr_valid = 1;
5509 map->includes_filehdr = 0;
5510 map->includes_phdrs = 0;
5513 while (isec < section_count);
5518 /* The Solaris linker creates program headers in which all the
5519 p_paddr fields are zero. When we try to objcopy or strip such a
5520 file, we get confused. Check for this case, and if we find it
5521 reset the p_paddr_valid fields. */
5522 for (map = map_first; map != NULL; map = map->next)
5523 if (map->p_paddr != 0)
5526 for (map = map_first; map != NULL; map = map->next)
5527 map->p_paddr_valid = 0;
5529 elf_tdata (obfd)->segment_map = map_first;
5531 /* If we had to estimate the number of program headers that were
5532 going to be needed, then check our estimate now and adjust
5533 the offset if necessary. */
5534 if (phdr_adjust_seg != NULL)
5538 for (count = 0, map = map_first; map != NULL; map = map->next)
5541 if (count > phdr_adjust_num)
5542 phdr_adjust_seg->p_paddr
5543 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5548 #undef IS_CONTAINED_BY_VMA
5549 #undef IS_CONTAINED_BY_LMA
5550 #undef IS_COREFILE_NOTE
5551 #undef IS_SOLARIS_PT_INTERP
5552 #undef IS_SECTION_IN_INPUT_SEGMENT
5553 #undef INCLUDE_SECTION_IN_SEGMENT
5554 #undef SEGMENT_AFTER_SEGMENT
5555 #undef SEGMENT_OVERLAPS
5559 /* Copy ELF program header information. */
5562 copy_elf_program_header (bfd *ibfd, bfd *obfd)
5564 Elf_Internal_Ehdr *iehdr;
5565 struct elf_segment_map *map;
5566 struct elf_segment_map *map_first;
5567 struct elf_segment_map **pointer_to_map;
5568 Elf_Internal_Phdr *segment;
5570 unsigned int num_segments;
5571 bfd_boolean phdr_included = FALSE;
5573 iehdr = elf_elfheader (ibfd);
5576 pointer_to_map = &map_first;
5578 num_segments = elf_elfheader (ibfd)->e_phnum;
5579 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5584 unsigned int section_count;
5586 Elf_Internal_Shdr *this_hdr;
5587 asection *first_section = NULL;
5588 asection *lowest_section = NULL;
5590 /* FIXME: Do we need to copy PT_NULL segment? */
5591 if (segment->p_type == PT_NULL)
5594 /* Compute how many sections are in this segment. */
5595 for (section = ibfd->sections, section_count = 0;
5597 section = section->next)
5599 this_hdr = &(elf_section_data(section)->this_hdr);
5600 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5603 first_section = lowest_section = section;
5604 if (section->lma < lowest_section->lma)
5605 lowest_section = section;
5610 /* Allocate a segment map big enough to contain
5611 all of the sections we have selected. */
5612 amt = sizeof (struct elf_segment_map);
5613 if (section_count != 0)
5614 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5615 map = bfd_zalloc (obfd, amt);
5619 /* Initialize the fields of the output segment map with the
5622 map->p_type = segment->p_type;
5623 map->p_flags = segment->p_flags;
5624 map->p_flags_valid = 1;
5625 map->p_paddr = segment->p_paddr;
5626 map->p_paddr_valid = 1;
5627 map->p_align = segment->p_align;
5628 map->p_align_valid = 1;
5629 map->p_vaddr_offset = 0;
5631 /* Determine if this segment contains the ELF file header
5632 and if it contains the program headers themselves. */
5633 map->includes_filehdr = (segment->p_offset == 0
5634 && segment->p_filesz >= iehdr->e_ehsize);
5636 map->includes_phdrs = 0;
5637 if (! phdr_included || segment->p_type != PT_LOAD)
5639 map->includes_phdrs =
5640 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5641 && (segment->p_offset + segment->p_filesz
5642 >= ((bfd_vma) iehdr->e_phoff
5643 + iehdr->e_phnum * iehdr->e_phentsize)));
5645 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5646 phdr_included = TRUE;
5649 if (!map->includes_phdrs && !map->includes_filehdr)
5650 /* There is some other padding before the first section. */
5651 map->p_vaddr_offset = ((lowest_section ? lowest_section->lma : 0)
5652 - segment->p_paddr);
5654 if (section_count != 0)
5656 unsigned int isec = 0;
5658 for (section = first_section;
5660 section = section->next)
5662 this_hdr = &(elf_section_data(section)->this_hdr);
5663 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5665 map->sections[isec++] = section->output_section;
5666 if (isec == section_count)
5672 map->count = section_count;
5673 *pointer_to_map = map;
5674 pointer_to_map = &map->next;
5677 elf_tdata (obfd)->segment_map = map_first;
5681 /* Copy private BFD data. This copies or rewrites ELF program header
5685 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
5687 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5688 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5691 if (elf_tdata (ibfd)->phdr == NULL)
5694 if (ibfd->xvec == obfd->xvec)
5696 /* Check to see if any sections in the input BFD
5697 covered by ELF program header have changed. */
5698 Elf_Internal_Phdr *segment;
5699 asection *section, *osec;
5700 unsigned int i, num_segments;
5701 Elf_Internal_Shdr *this_hdr;
5703 /* Initialize the segment mark field. */
5704 for (section = obfd->sections; section != NULL;
5705 section = section->next)
5706 section->segment_mark = FALSE;
5708 num_segments = elf_elfheader (ibfd)->e_phnum;
5709 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5713 /* PR binutils/3535. The Solaris linker always sets the p_paddr
5714 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
5715 which severly confuses things, so always regenerate the segment
5716 map in this case. */
5717 if (segment->p_paddr == 0
5718 && segment->p_memsz == 0
5719 && (segment->p_type == PT_INTERP || segment->p_type == PT_DYNAMIC))
5722 for (section = ibfd->sections;
5723 section != NULL; section = section->next)
5725 /* We mark the output section so that we know it comes
5726 from the input BFD. */
5727 osec = section->output_section;
5729 osec->segment_mark = TRUE;
5731 /* Check if this section is covered by the segment. */
5732 this_hdr = &(elf_section_data(section)->this_hdr);
5733 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5735 /* FIXME: Check if its output section is changed or
5736 removed. What else do we need to check? */
5738 || section->flags != osec->flags
5739 || section->lma != osec->lma
5740 || section->vma != osec->vma
5741 || section->size != osec->size
5742 || section->rawsize != osec->rawsize
5743 || section->alignment_power != osec->alignment_power)
5749 /* Check to see if any output section do not come from the
5751 for (section = obfd->sections; section != NULL;
5752 section = section->next)
5754 if (section->segment_mark == FALSE)
5757 section->segment_mark = FALSE;
5760 return copy_elf_program_header (ibfd, obfd);
5764 return rewrite_elf_program_header (ibfd, obfd);
5767 /* Initialize private output section information from input section. */
5770 _bfd_elf_init_private_section_data (bfd *ibfd,
5774 struct bfd_link_info *link_info)
5777 Elf_Internal_Shdr *ihdr, *ohdr;
5778 bfd_boolean need_group = link_info == NULL || link_info->relocatable;
5780 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5781 || obfd->xvec->flavour != bfd_target_elf_flavour)
5784 /* Don't copy the output ELF section type from input if the
5785 output BFD section flags have been set to something different.
5786 elf_fake_sections will set ELF section type based on BFD
5788 if (elf_section_type (osec) == SHT_NULL
5789 && (osec->flags == isec->flags || !osec->flags))
5790 elf_section_type (osec) = elf_section_type (isec);
5792 /* FIXME: Is this correct for all OS/PROC specific flags? */
5793 elf_section_flags (osec) |= (elf_section_flags (isec)
5794 & (SHF_MASKOS | SHF_MASKPROC));
5796 /* Set things up for objcopy and relocatable link. The output
5797 SHT_GROUP section will have its elf_next_in_group pointing back
5798 to the input group members. Ignore linker created group section.
5799 See elfNN_ia64_object_p in elfxx-ia64.c. */
5802 if (elf_sec_group (isec) == NULL
5803 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)
5805 if (elf_section_flags (isec) & SHF_GROUP)
5806 elf_section_flags (osec) |= SHF_GROUP;
5807 elf_next_in_group (osec) = elf_next_in_group (isec);
5808 elf_group_name (osec) = elf_group_name (isec);
5812 ihdr = &elf_section_data (isec)->this_hdr;
5814 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
5815 don't use the output section of the linked-to section since it
5816 may be NULL at this point. */
5817 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
5819 ohdr = &elf_section_data (osec)->this_hdr;
5820 ohdr->sh_flags |= SHF_LINK_ORDER;
5821 elf_linked_to_section (osec) = elf_linked_to_section (isec);
5824 osec->use_rela_p = isec->use_rela_p;
5829 /* Copy private section information. This copies over the entsize
5830 field, and sometimes the info field. */
5833 _bfd_elf_copy_private_section_data (bfd *ibfd,
5838 Elf_Internal_Shdr *ihdr, *ohdr;
5840 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5841 || obfd->xvec->flavour != bfd_target_elf_flavour)
5844 ihdr = &elf_section_data (isec)->this_hdr;
5845 ohdr = &elf_section_data (osec)->this_hdr;
5847 ohdr->sh_entsize = ihdr->sh_entsize;
5849 if (ihdr->sh_type == SHT_SYMTAB
5850 || ihdr->sh_type == SHT_DYNSYM
5851 || ihdr->sh_type == SHT_GNU_verneed
5852 || ihdr->sh_type == SHT_GNU_verdef)
5853 ohdr->sh_info = ihdr->sh_info;
5855 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
5859 /* Copy private header information. */
5862 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
5866 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5867 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5870 /* Copy over private BFD data if it has not already been copied.
5871 This must be done here, rather than in the copy_private_bfd_data
5872 entry point, because the latter is called after the section
5873 contents have been set, which means that the program headers have
5874 already been worked out. */
5875 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
5877 if (! copy_private_bfd_data (ibfd, obfd))
5881 /* _bfd_elf_copy_private_section_data copied over the SHF_GROUP flag
5882 but this might be wrong if we deleted the group section. */
5883 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
5884 if (elf_section_type (isec) == SHT_GROUP
5885 && isec->output_section == NULL)
5887 asection *first = elf_next_in_group (isec);
5888 asection *s = first;
5891 if (s->output_section != NULL)
5893 elf_section_flags (s->output_section) &= ~SHF_GROUP;
5894 elf_group_name (s->output_section) = NULL;
5896 s = elf_next_in_group (s);
5905 /* Copy private symbol information. If this symbol is in a section
5906 which we did not map into a BFD section, try to map the section
5907 index correctly. We use special macro definitions for the mapped
5908 section indices; these definitions are interpreted by the
5909 swap_out_syms function. */
5911 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5912 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5913 #define MAP_STRTAB (SHN_HIOS + 3)
5914 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5915 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5918 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
5923 elf_symbol_type *isym, *osym;
5925 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5926 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5929 isym = elf_symbol_from (ibfd, isymarg);
5930 osym = elf_symbol_from (obfd, osymarg);
5934 && bfd_is_abs_section (isym->symbol.section))
5938 shndx = isym->internal_elf_sym.st_shndx;
5939 if (shndx == elf_onesymtab (ibfd))
5940 shndx = MAP_ONESYMTAB;
5941 else if (shndx == elf_dynsymtab (ibfd))
5942 shndx = MAP_DYNSYMTAB;
5943 else if (shndx == elf_tdata (ibfd)->strtab_section)
5945 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
5946 shndx = MAP_SHSTRTAB;
5947 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
5948 shndx = MAP_SYM_SHNDX;
5949 osym->internal_elf_sym.st_shndx = shndx;
5955 /* Swap out the symbols. */
5958 swap_out_syms (bfd *abfd,
5959 struct bfd_strtab_hash **sttp,
5962 const struct elf_backend_data *bed;
5965 struct bfd_strtab_hash *stt;
5966 Elf_Internal_Shdr *symtab_hdr;
5967 Elf_Internal_Shdr *symtab_shndx_hdr;
5968 Elf_Internal_Shdr *symstrtab_hdr;
5969 bfd_byte *outbound_syms;
5970 bfd_byte *outbound_shndx;
5973 bfd_boolean name_local_sections;
5975 if (!elf_map_symbols (abfd))
5978 /* Dump out the symtabs. */
5979 stt = _bfd_elf_stringtab_init ();
5983 bed = get_elf_backend_data (abfd);
5984 symcount = bfd_get_symcount (abfd);
5985 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5986 symtab_hdr->sh_type = SHT_SYMTAB;
5987 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
5988 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
5989 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
5990 symtab_hdr->sh_addralign = 1 << bed->s->log_file_align;
5992 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
5993 symstrtab_hdr->sh_type = SHT_STRTAB;
5995 outbound_syms = bfd_alloc2 (abfd, 1 + symcount, bed->s->sizeof_sym);
5996 if (outbound_syms == NULL)
5998 _bfd_stringtab_free (stt);
6001 symtab_hdr->contents = outbound_syms;
6003 outbound_shndx = NULL;
6004 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
6005 if (symtab_shndx_hdr->sh_name != 0)
6007 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
6008 outbound_shndx = bfd_zalloc2 (abfd, 1 + symcount,
6009 sizeof (Elf_External_Sym_Shndx));
6010 if (outbound_shndx == NULL)
6012 _bfd_stringtab_free (stt);
6016 symtab_shndx_hdr->contents = outbound_shndx;
6017 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
6018 symtab_shndx_hdr->sh_size = amt;
6019 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
6020 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
6023 /* Now generate the data (for "contents"). */
6025 /* Fill in zeroth symbol and swap it out. */
6026 Elf_Internal_Sym sym;
6032 sym.st_shndx = SHN_UNDEF;
6033 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6034 outbound_syms += bed->s->sizeof_sym;
6035 if (outbound_shndx != NULL)
6036 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6040 = (bed->elf_backend_name_local_section_symbols
6041 && bed->elf_backend_name_local_section_symbols (abfd));
6043 syms = bfd_get_outsymbols (abfd);
6044 for (idx = 0; idx < symcount; idx++)
6046 Elf_Internal_Sym sym;
6047 bfd_vma value = syms[idx]->value;
6048 elf_symbol_type *type_ptr;
6049 flagword flags = syms[idx]->flags;
6052 if (!name_local_sections
6053 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
6055 /* Local section symbols have no name. */
6060 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
6063 if (sym.st_name == (unsigned long) -1)
6065 _bfd_stringtab_free (stt);
6070 type_ptr = elf_symbol_from (abfd, syms[idx]);
6072 if ((flags & BSF_SECTION_SYM) == 0
6073 && bfd_is_com_section (syms[idx]->section))
6075 /* ELF common symbols put the alignment into the `value' field,
6076 and the size into the `size' field. This is backwards from
6077 how BFD handles it, so reverse it here. */
6078 sym.st_size = value;
6079 if (type_ptr == NULL
6080 || type_ptr->internal_elf_sym.st_value == 0)
6081 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
6083 sym.st_value = type_ptr->internal_elf_sym.st_value;
6084 sym.st_shndx = _bfd_elf_section_from_bfd_section
6085 (abfd, syms[idx]->section);
6089 asection *sec = syms[idx]->section;
6092 if (sec->output_section)
6094 value += sec->output_offset;
6095 sec = sec->output_section;
6098 /* Don't add in the section vma for relocatable output. */
6099 if (! relocatable_p)
6101 sym.st_value = value;
6102 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
6104 if (bfd_is_abs_section (sec)
6106 && type_ptr->internal_elf_sym.st_shndx != 0)
6108 /* This symbol is in a real ELF section which we did
6109 not create as a BFD section. Undo the mapping done
6110 by copy_private_symbol_data. */
6111 shndx = type_ptr->internal_elf_sym.st_shndx;
6115 shndx = elf_onesymtab (abfd);
6118 shndx = elf_dynsymtab (abfd);
6121 shndx = elf_tdata (abfd)->strtab_section;
6124 shndx = elf_tdata (abfd)->shstrtab_section;
6127 shndx = elf_tdata (abfd)->symtab_shndx_section;
6135 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
6141 /* Writing this would be a hell of a lot easier if
6142 we had some decent documentation on bfd, and
6143 knew what to expect of the library, and what to
6144 demand of applications. For example, it
6145 appears that `objcopy' might not set the
6146 section of a symbol to be a section that is
6147 actually in the output file. */
6148 sec2 = bfd_get_section_by_name (abfd, sec->name);
6151 _bfd_error_handler (_("\
6152 Unable to find equivalent output section for symbol '%s' from section '%s'"),
6153 syms[idx]->name ? syms[idx]->name : "<Local sym>",
6155 bfd_set_error (bfd_error_invalid_operation);
6156 _bfd_stringtab_free (stt);
6160 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
6161 BFD_ASSERT (shndx != -1);
6165 sym.st_shndx = shndx;
6168 if ((flags & BSF_THREAD_LOCAL) != 0)
6170 else if ((flags & BSF_FUNCTION) != 0)
6172 else if ((flags & BSF_OBJECT) != 0)
6174 else if ((flags & BSF_RELC) != 0)
6176 else if ((flags & BSF_SRELC) != 0)
6181 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
6184 /* Processor-specific types. */
6185 if (type_ptr != NULL
6186 && bed->elf_backend_get_symbol_type)
6187 type = ((*bed->elf_backend_get_symbol_type)
6188 (&type_ptr->internal_elf_sym, type));
6190 if (flags & BSF_SECTION_SYM)
6192 if (flags & BSF_GLOBAL)
6193 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
6195 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
6197 else if (bfd_is_com_section (syms[idx]->section))
6198 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
6199 else if (bfd_is_und_section (syms[idx]->section))
6200 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
6204 else if (flags & BSF_FILE)
6205 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
6208 int bind = STB_LOCAL;
6210 if (flags & BSF_LOCAL)
6212 else if (flags & BSF_WEAK)
6214 else if (flags & BSF_GLOBAL)
6217 sym.st_info = ELF_ST_INFO (bind, type);
6220 if (type_ptr != NULL)
6221 sym.st_other = type_ptr->internal_elf_sym.st_other;
6225 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6226 outbound_syms += bed->s->sizeof_sym;
6227 if (outbound_shndx != NULL)
6228 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6232 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
6233 symstrtab_hdr->sh_type = SHT_STRTAB;
6235 symstrtab_hdr->sh_flags = 0;
6236 symstrtab_hdr->sh_addr = 0;
6237 symstrtab_hdr->sh_entsize = 0;
6238 symstrtab_hdr->sh_link = 0;
6239 symstrtab_hdr->sh_info = 0;
6240 symstrtab_hdr->sh_addralign = 1;
6245 /* Return the number of bytes required to hold the symtab vector.
6247 Note that we base it on the count plus 1, since we will null terminate
6248 the vector allocated based on this size. However, the ELF symbol table
6249 always has a dummy entry as symbol #0, so it ends up even. */
6252 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
6256 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
6258 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6259 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6261 symtab_size -= sizeof (asymbol *);
6267 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
6271 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
6273 if (elf_dynsymtab (abfd) == 0)
6275 bfd_set_error (bfd_error_invalid_operation);
6279 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6280 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6282 symtab_size -= sizeof (asymbol *);
6288 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
6291 return (asect->reloc_count + 1) * sizeof (arelent *);
6294 /* Canonicalize the relocs. */
6297 _bfd_elf_canonicalize_reloc (bfd *abfd,
6304 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6306 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
6309 tblptr = section->relocation;
6310 for (i = 0; i < section->reloc_count; i++)
6311 *relptr++ = tblptr++;
6315 return section->reloc_count;
6319 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
6321 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6322 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
6325 bfd_get_symcount (abfd) = symcount;
6330 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
6331 asymbol **allocation)
6333 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6334 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
6337 bfd_get_dynamic_symcount (abfd) = symcount;
6341 /* Return the size required for the dynamic reloc entries. Any loadable
6342 section that was actually installed in the BFD, and has type SHT_REL
6343 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6344 dynamic reloc section. */
6347 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
6352 if (elf_dynsymtab (abfd) == 0)
6354 bfd_set_error (bfd_error_invalid_operation);
6358 ret = sizeof (arelent *);
6359 for (s = abfd->sections; s != NULL; s = s->next)
6360 if ((s->flags & SEC_LOAD) != 0
6361 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6362 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6363 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6364 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
6365 * sizeof (arelent *));
6370 /* Canonicalize the dynamic relocation entries. Note that we return the
6371 dynamic relocations as a single block, although they are actually
6372 associated with particular sections; the interface, which was
6373 designed for SunOS style shared libraries, expects that there is only
6374 one set of dynamic relocs. Any loadable section that was actually
6375 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6376 dynamic symbol table, is considered to be a dynamic reloc section. */
6379 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
6383 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6387 if (elf_dynsymtab (abfd) == 0)
6389 bfd_set_error (bfd_error_invalid_operation);
6393 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6395 for (s = abfd->sections; s != NULL; s = s->next)
6397 if ((s->flags & SEC_LOAD) != 0
6398 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6399 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6400 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6405 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
6407 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
6409 for (i = 0; i < count; i++)
6420 /* Read in the version information. */
6423 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
6425 bfd_byte *contents = NULL;
6426 unsigned int freeidx = 0;
6428 if (elf_dynverref (abfd) != 0)
6430 Elf_Internal_Shdr *hdr;
6431 Elf_External_Verneed *everneed;
6432 Elf_Internal_Verneed *iverneed;
6434 bfd_byte *contents_end;
6436 hdr = &elf_tdata (abfd)->dynverref_hdr;
6438 elf_tdata (abfd)->verref = bfd_zalloc2 (abfd, hdr->sh_info,
6439 sizeof (Elf_Internal_Verneed));
6440 if (elf_tdata (abfd)->verref == NULL)
6443 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6445 contents = bfd_malloc (hdr->sh_size);
6446 if (contents == NULL)
6448 error_return_verref:
6449 elf_tdata (abfd)->verref = NULL;
6450 elf_tdata (abfd)->cverrefs = 0;
6453 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6454 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6455 goto error_return_verref;
6457 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verneed))
6458 goto error_return_verref;
6460 BFD_ASSERT (sizeof (Elf_External_Verneed)
6461 == sizeof (Elf_External_Vernaux));
6462 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
6463 everneed = (Elf_External_Verneed *) contents;
6464 iverneed = elf_tdata (abfd)->verref;
6465 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6467 Elf_External_Vernaux *evernaux;
6468 Elf_Internal_Vernaux *ivernaux;
6471 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
6473 iverneed->vn_bfd = abfd;
6475 iverneed->vn_filename =
6476 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6478 if (iverneed->vn_filename == NULL)
6479 goto error_return_verref;
6481 if (iverneed->vn_cnt == 0)
6482 iverneed->vn_auxptr = NULL;
6485 iverneed->vn_auxptr = bfd_alloc2 (abfd, iverneed->vn_cnt,
6486 sizeof (Elf_Internal_Vernaux));
6487 if (iverneed->vn_auxptr == NULL)
6488 goto error_return_verref;
6491 if (iverneed->vn_aux
6492 > (size_t) (contents_end - (bfd_byte *) everneed))
6493 goto error_return_verref;
6495 evernaux = ((Elf_External_Vernaux *)
6496 ((bfd_byte *) everneed + iverneed->vn_aux));
6497 ivernaux = iverneed->vn_auxptr;
6498 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
6500 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
6502 ivernaux->vna_nodename =
6503 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6504 ivernaux->vna_name);
6505 if (ivernaux->vna_nodename == NULL)
6506 goto error_return_verref;
6508 if (j + 1 < iverneed->vn_cnt)
6509 ivernaux->vna_nextptr = ivernaux + 1;
6511 ivernaux->vna_nextptr = NULL;
6513 if (ivernaux->vna_next
6514 > (size_t) (contents_end - (bfd_byte *) evernaux))
6515 goto error_return_verref;
6517 evernaux = ((Elf_External_Vernaux *)
6518 ((bfd_byte *) evernaux + ivernaux->vna_next));
6520 if (ivernaux->vna_other > freeidx)
6521 freeidx = ivernaux->vna_other;
6524 if (i + 1 < hdr->sh_info)
6525 iverneed->vn_nextref = iverneed + 1;
6527 iverneed->vn_nextref = NULL;
6529 if (iverneed->vn_next
6530 > (size_t) (contents_end - (bfd_byte *) everneed))
6531 goto error_return_verref;
6533 everneed = ((Elf_External_Verneed *)
6534 ((bfd_byte *) everneed + iverneed->vn_next));
6541 if (elf_dynverdef (abfd) != 0)
6543 Elf_Internal_Shdr *hdr;
6544 Elf_External_Verdef *everdef;
6545 Elf_Internal_Verdef *iverdef;
6546 Elf_Internal_Verdef *iverdefarr;
6547 Elf_Internal_Verdef iverdefmem;
6549 unsigned int maxidx;
6550 bfd_byte *contents_end_def, *contents_end_aux;
6552 hdr = &elf_tdata (abfd)->dynverdef_hdr;
6554 contents = bfd_malloc (hdr->sh_size);
6555 if (contents == NULL)
6557 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6558 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6561 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verdef))
6564 BFD_ASSERT (sizeof (Elf_External_Verdef)
6565 >= sizeof (Elf_External_Verdaux));
6566 contents_end_def = contents + hdr->sh_size
6567 - sizeof (Elf_External_Verdef);
6568 contents_end_aux = contents + hdr->sh_size
6569 - sizeof (Elf_External_Verdaux);
6571 /* We know the number of entries in the section but not the maximum
6572 index. Therefore we have to run through all entries and find
6574 everdef = (Elf_External_Verdef *) contents;
6576 for (i = 0; i < hdr->sh_info; ++i)
6578 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6580 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
6581 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
6583 if (iverdefmem.vd_next
6584 > (size_t) (contents_end_def - (bfd_byte *) everdef))
6587 everdef = ((Elf_External_Verdef *)
6588 ((bfd_byte *) everdef + iverdefmem.vd_next));
6591 if (default_imported_symver)
6593 if (freeidx > maxidx)
6598 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, maxidx,
6599 sizeof (Elf_Internal_Verdef));
6600 if (elf_tdata (abfd)->verdef == NULL)
6603 elf_tdata (abfd)->cverdefs = maxidx;
6605 everdef = (Elf_External_Verdef *) contents;
6606 iverdefarr = elf_tdata (abfd)->verdef;
6607 for (i = 0; i < hdr->sh_info; i++)
6609 Elf_External_Verdaux *everdaux;
6610 Elf_Internal_Verdaux *iverdaux;
6613 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6615 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
6617 error_return_verdef:
6618 elf_tdata (abfd)->verdef = NULL;
6619 elf_tdata (abfd)->cverdefs = 0;
6623 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
6624 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
6626 iverdef->vd_bfd = abfd;
6628 if (iverdef->vd_cnt == 0)
6629 iverdef->vd_auxptr = NULL;
6632 iverdef->vd_auxptr = bfd_alloc2 (abfd, iverdef->vd_cnt,
6633 sizeof (Elf_Internal_Verdaux));
6634 if (iverdef->vd_auxptr == NULL)
6635 goto error_return_verdef;
6639 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
6640 goto error_return_verdef;
6642 everdaux = ((Elf_External_Verdaux *)
6643 ((bfd_byte *) everdef + iverdef->vd_aux));
6644 iverdaux = iverdef->vd_auxptr;
6645 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
6647 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
6649 iverdaux->vda_nodename =
6650 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6651 iverdaux->vda_name);
6652 if (iverdaux->vda_nodename == NULL)
6653 goto error_return_verdef;
6655 if (j + 1 < iverdef->vd_cnt)
6656 iverdaux->vda_nextptr = iverdaux + 1;
6658 iverdaux->vda_nextptr = NULL;
6660 if (iverdaux->vda_next
6661 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
6662 goto error_return_verdef;
6664 everdaux = ((Elf_External_Verdaux *)
6665 ((bfd_byte *) everdaux + iverdaux->vda_next));
6668 if (iverdef->vd_cnt)
6669 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
6671 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
6672 iverdef->vd_nextdef = iverdef + 1;
6674 iverdef->vd_nextdef = NULL;
6676 everdef = ((Elf_External_Verdef *)
6677 ((bfd_byte *) everdef + iverdef->vd_next));
6683 else if (default_imported_symver)
6690 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, freeidx,
6691 sizeof (Elf_Internal_Verdef));
6692 if (elf_tdata (abfd)->verdef == NULL)
6695 elf_tdata (abfd)->cverdefs = freeidx;
6698 /* Create a default version based on the soname. */
6699 if (default_imported_symver)
6701 Elf_Internal_Verdef *iverdef;
6702 Elf_Internal_Verdaux *iverdaux;
6704 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];;
6706 iverdef->vd_version = VER_DEF_CURRENT;
6707 iverdef->vd_flags = 0;
6708 iverdef->vd_ndx = freeidx;
6709 iverdef->vd_cnt = 1;
6711 iverdef->vd_bfd = abfd;
6713 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
6714 if (iverdef->vd_nodename == NULL)
6715 goto error_return_verdef;
6716 iverdef->vd_nextdef = NULL;
6717 iverdef->vd_auxptr = bfd_alloc (abfd, sizeof (Elf_Internal_Verdaux));
6718 if (iverdef->vd_auxptr == NULL)
6719 goto error_return_verdef;
6721 iverdaux = iverdef->vd_auxptr;
6722 iverdaux->vda_nodename = iverdef->vd_nodename;
6723 iverdaux->vda_nextptr = NULL;
6729 if (contents != NULL)
6735 _bfd_elf_make_empty_symbol (bfd *abfd)
6737 elf_symbol_type *newsym;
6738 bfd_size_type amt = sizeof (elf_symbol_type);
6740 newsym = bfd_zalloc (abfd, amt);
6745 newsym->symbol.the_bfd = abfd;
6746 return &newsym->symbol;
6751 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
6755 bfd_symbol_info (symbol, ret);
6758 /* Return whether a symbol name implies a local symbol. Most targets
6759 use this function for the is_local_label_name entry point, but some
6763 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
6766 /* Normal local symbols start with ``.L''. */
6767 if (name[0] == '.' && name[1] == 'L')
6770 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6771 DWARF debugging symbols starting with ``..''. */
6772 if (name[0] == '.' && name[1] == '.')
6775 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6776 emitting DWARF debugging output. I suspect this is actually a
6777 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6778 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6779 underscore to be emitted on some ELF targets). For ease of use,
6780 we treat such symbols as local. */
6781 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
6788 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
6789 asymbol *symbol ATTRIBUTE_UNUSED)
6796 _bfd_elf_set_arch_mach (bfd *abfd,
6797 enum bfd_architecture arch,
6798 unsigned long machine)
6800 /* If this isn't the right architecture for this backend, and this
6801 isn't the generic backend, fail. */
6802 if (arch != get_elf_backend_data (abfd)->arch
6803 && arch != bfd_arch_unknown
6804 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
6807 return bfd_default_set_arch_mach (abfd, arch, machine);
6810 /* Find the function to a particular section and offset,
6811 for error reporting. */
6814 elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
6818 const char **filename_ptr,
6819 const char **functionname_ptr)
6821 const char *filename;
6822 asymbol *func, *file;
6825 /* ??? Given multiple file symbols, it is impossible to reliably
6826 choose the right file name for global symbols. File symbols are
6827 local symbols, and thus all file symbols must sort before any
6828 global symbols. The ELF spec may be interpreted to say that a
6829 file symbol must sort before other local symbols, but currently
6830 ld -r doesn't do this. So, for ld -r output, it is possible to
6831 make a better choice of file name for local symbols by ignoring
6832 file symbols appearing after a given local symbol. */
6833 enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
6839 state = nothing_seen;
6841 for (p = symbols; *p != NULL; p++)
6845 q = (elf_symbol_type *) *p;
6847 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6853 if (state == symbol_seen)
6854 state = file_after_symbol_seen;
6858 if (bfd_get_section (&q->symbol) == section
6859 && q->symbol.value >= low_func
6860 && q->symbol.value <= offset)
6862 func = (asymbol *) q;
6863 low_func = q->symbol.value;
6866 && (ELF_ST_BIND (q->internal_elf_sym.st_info) == STB_LOCAL
6867 || state != file_after_symbol_seen))
6868 filename = bfd_asymbol_name (file);
6872 if (state == nothing_seen)
6873 state = symbol_seen;
6880 *filename_ptr = filename;
6881 if (functionname_ptr)
6882 *functionname_ptr = bfd_asymbol_name (func);
6887 /* Find the nearest line to a particular section and offset,
6888 for error reporting. */
6891 _bfd_elf_find_nearest_line (bfd *abfd,
6895 const char **filename_ptr,
6896 const char **functionname_ptr,
6897 unsigned int *line_ptr)
6901 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
6902 filename_ptr, functionname_ptr,
6905 if (!*functionname_ptr)
6906 elf_find_function (abfd, section, symbols, offset,
6907 *filename_ptr ? NULL : filename_ptr,
6913 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
6914 filename_ptr, functionname_ptr,
6916 &elf_tdata (abfd)->dwarf2_find_line_info))
6918 if (!*functionname_ptr)
6919 elf_find_function (abfd, section, symbols, offset,
6920 *filename_ptr ? NULL : filename_ptr,
6926 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6927 &found, filename_ptr,
6928 functionname_ptr, line_ptr,
6929 &elf_tdata (abfd)->line_info))
6931 if (found && (*functionname_ptr || *line_ptr))
6934 if (symbols == NULL)
6937 if (! elf_find_function (abfd, section, symbols, offset,
6938 filename_ptr, functionname_ptr))
6945 /* Find the line for a symbol. */
6948 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
6949 const char **filename_ptr, unsigned int *line_ptr)
6951 return _bfd_dwarf2_find_line (abfd, symbols, symbol,
6952 filename_ptr, line_ptr, 0,
6953 &elf_tdata (abfd)->dwarf2_find_line_info);
6956 /* After a call to bfd_find_nearest_line, successive calls to
6957 bfd_find_inliner_info can be used to get source information about
6958 each level of function inlining that terminated at the address
6959 passed to bfd_find_nearest_line. Currently this is only supported
6960 for DWARF2 with appropriate DWARF3 extensions. */
6963 _bfd_elf_find_inliner_info (bfd *abfd,
6964 const char **filename_ptr,
6965 const char **functionname_ptr,
6966 unsigned int *line_ptr)
6969 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
6970 functionname_ptr, line_ptr,
6971 & elf_tdata (abfd)->dwarf2_find_line_info);
6976 _bfd_elf_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
6978 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6979 int ret = bed->s->sizeof_ehdr;
6981 if (!info->relocatable)
6983 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
6985 if (phdr_size == (bfd_size_type) -1)
6987 struct elf_segment_map *m;
6990 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
6991 phdr_size += bed->s->sizeof_phdr;
6994 phdr_size = get_program_header_size (abfd, info);
6997 elf_tdata (abfd)->program_header_size = phdr_size;
7005 _bfd_elf_set_section_contents (bfd *abfd,
7007 const void *location,
7009 bfd_size_type count)
7011 Elf_Internal_Shdr *hdr;
7014 if (! abfd->output_has_begun
7015 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
7018 hdr = &elf_section_data (section)->this_hdr;
7019 pos = hdr->sh_offset + offset;
7020 if (bfd_seek (abfd, pos, SEEK_SET) != 0
7021 || bfd_bwrite (location, count, abfd) != count)
7028 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
7029 arelent *cache_ptr ATTRIBUTE_UNUSED,
7030 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
7035 /* Try to convert a non-ELF reloc into an ELF one. */
7038 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
7040 /* Check whether we really have an ELF howto. */
7042 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
7044 bfd_reloc_code_real_type code;
7045 reloc_howto_type *howto;
7047 /* Alien reloc: Try to determine its type to replace it with an
7048 equivalent ELF reloc. */
7050 if (areloc->howto->pc_relative)
7052 switch (areloc->howto->bitsize)
7055 code = BFD_RELOC_8_PCREL;
7058 code = BFD_RELOC_12_PCREL;
7061 code = BFD_RELOC_16_PCREL;
7064 code = BFD_RELOC_24_PCREL;
7067 code = BFD_RELOC_32_PCREL;
7070 code = BFD_RELOC_64_PCREL;
7076 howto = bfd_reloc_type_lookup (abfd, code);
7078 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
7080 if (howto->pcrel_offset)
7081 areloc->addend += areloc->address;
7083 areloc->addend -= areloc->address; /* addend is unsigned!! */
7088 switch (areloc->howto->bitsize)
7094 code = BFD_RELOC_14;
7097 code = BFD_RELOC_16;
7100 code = BFD_RELOC_26;
7103 code = BFD_RELOC_32;
7106 code = BFD_RELOC_64;
7112 howto = bfd_reloc_type_lookup (abfd, code);
7116 areloc->howto = howto;
7124 (*_bfd_error_handler)
7125 (_("%B: unsupported relocation type %s"),
7126 abfd, areloc->howto->name);
7127 bfd_set_error (bfd_error_bad_value);
7132 _bfd_elf_close_and_cleanup (bfd *abfd)
7134 if (bfd_get_format (abfd) == bfd_object)
7136 if (elf_tdata (abfd) != NULL && elf_shstrtab (abfd) != NULL)
7137 _bfd_elf_strtab_free (elf_shstrtab (abfd));
7138 _bfd_dwarf2_cleanup_debug_info (abfd);
7141 return _bfd_generic_close_and_cleanup (abfd);
7144 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
7145 in the relocation's offset. Thus we cannot allow any sort of sanity
7146 range-checking to interfere. There is nothing else to do in processing
7149 bfd_reloc_status_type
7150 _bfd_elf_rel_vtable_reloc_fn
7151 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
7152 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
7153 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
7154 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
7156 return bfd_reloc_ok;
7159 /* Elf core file support. Much of this only works on native
7160 toolchains, since we rely on knowing the
7161 machine-dependent procfs structure in order to pick
7162 out details about the corefile. */
7164 #ifdef HAVE_SYS_PROCFS_H
7165 # include <sys/procfs.h>
7168 /* FIXME: this is kinda wrong, but it's what gdb wants. */
7171 elfcore_make_pid (bfd *abfd)
7173 return ((elf_tdata (abfd)->core_lwpid << 16)
7174 + (elf_tdata (abfd)->core_pid));
7177 /* If there isn't a section called NAME, make one, using
7178 data from SECT. Note, this function will generate a
7179 reference to NAME, so you shouldn't deallocate or
7183 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
7187 if (bfd_get_section_by_name (abfd, name) != NULL)
7190 sect2 = bfd_make_section_with_flags (abfd, name, sect->flags);
7194 sect2->size = sect->size;
7195 sect2->filepos = sect->filepos;
7196 sect2->alignment_power = sect->alignment_power;
7200 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
7201 actually creates up to two pseudosections:
7202 - For the single-threaded case, a section named NAME, unless
7203 such a section already exists.
7204 - For the multi-threaded case, a section named "NAME/PID", where
7205 PID is elfcore_make_pid (abfd).
7206 Both pseudosections have identical contents. */
7208 _bfd_elfcore_make_pseudosection (bfd *abfd,
7214 char *threaded_name;
7218 /* Build the section name. */
7220 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
7221 len = strlen (buf) + 1;
7222 threaded_name = bfd_alloc (abfd, len);
7223 if (threaded_name == NULL)
7225 memcpy (threaded_name, buf, len);
7227 sect = bfd_make_section_anyway_with_flags (abfd, threaded_name,
7232 sect->filepos = filepos;
7233 sect->alignment_power = 2;
7235 return elfcore_maybe_make_sect (abfd, name, sect);
7238 /* prstatus_t exists on:
7240 linux 2.[01] + glibc
7244 #if defined (HAVE_PRSTATUS_T)
7247 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
7252 if (note->descsz == sizeof (prstatus_t))
7256 size = sizeof (prstat.pr_reg);
7257 offset = offsetof (prstatus_t, pr_reg);
7258 memcpy (&prstat, note->descdata, sizeof (prstat));
7260 /* Do not overwrite the core signal if it
7261 has already been set by another thread. */
7262 if (elf_tdata (abfd)->core_signal == 0)
7263 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7264 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7266 /* pr_who exists on:
7269 pr_who doesn't exist on:
7272 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7273 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7276 #if defined (HAVE_PRSTATUS32_T)
7277 else if (note->descsz == sizeof (prstatus32_t))
7279 /* 64-bit host, 32-bit corefile */
7280 prstatus32_t prstat;
7282 size = sizeof (prstat.pr_reg);
7283 offset = offsetof (prstatus32_t, pr_reg);
7284 memcpy (&prstat, note->descdata, sizeof (prstat));
7286 /* Do not overwrite the core signal if it
7287 has already been set by another thread. */
7288 if (elf_tdata (abfd)->core_signal == 0)
7289 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7290 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7292 /* pr_who exists on:
7295 pr_who doesn't exist on:
7298 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7299 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7302 #endif /* HAVE_PRSTATUS32_T */
7305 /* Fail - we don't know how to handle any other
7306 note size (ie. data object type). */
7310 /* Make a ".reg/999" section and a ".reg" section. */
7311 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
7312 size, note->descpos + offset);
7314 #endif /* defined (HAVE_PRSTATUS_T) */
7316 /* Create a pseudosection containing the exact contents of NOTE. */
7318 elfcore_make_note_pseudosection (bfd *abfd,
7320 Elf_Internal_Note *note)
7322 return _bfd_elfcore_make_pseudosection (abfd, name,
7323 note->descsz, note->descpos);
7326 /* There isn't a consistent prfpregset_t across platforms,
7327 but it doesn't matter, because we don't have to pick this
7328 data structure apart. */
7331 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
7333 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7336 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7337 type of 5 (NT_PRXFPREG). Just include the whole note's contents
7341 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
7343 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
7346 #if defined (HAVE_PRPSINFO_T)
7347 typedef prpsinfo_t elfcore_psinfo_t;
7348 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7349 typedef prpsinfo32_t elfcore_psinfo32_t;
7353 #if defined (HAVE_PSINFO_T)
7354 typedef psinfo_t elfcore_psinfo_t;
7355 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7356 typedef psinfo32_t elfcore_psinfo32_t;
7360 /* return a malloc'ed copy of a string at START which is at
7361 most MAX bytes long, possibly without a terminating '\0'.
7362 the copy will always have a terminating '\0'. */
7365 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
7368 char *end = memchr (start, '\0', max);
7376 dups = bfd_alloc (abfd, len + 1);
7380 memcpy (dups, start, len);
7386 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7388 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
7390 if (note->descsz == sizeof (elfcore_psinfo_t))
7392 elfcore_psinfo_t psinfo;
7394 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7396 elf_tdata (abfd)->core_program
7397 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7398 sizeof (psinfo.pr_fname));
7400 elf_tdata (abfd)->core_command
7401 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7402 sizeof (psinfo.pr_psargs));
7404 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7405 else if (note->descsz == sizeof (elfcore_psinfo32_t))
7407 /* 64-bit host, 32-bit corefile */
7408 elfcore_psinfo32_t psinfo;
7410 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7412 elf_tdata (abfd)->core_program
7413 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7414 sizeof (psinfo.pr_fname));
7416 elf_tdata (abfd)->core_command
7417 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7418 sizeof (psinfo.pr_psargs));
7424 /* Fail - we don't know how to handle any other
7425 note size (ie. data object type). */
7429 /* Note that for some reason, a spurious space is tacked
7430 onto the end of the args in some (at least one anyway)
7431 implementations, so strip it off if it exists. */
7434 char *command = elf_tdata (abfd)->core_command;
7435 int n = strlen (command);
7437 if (0 < n && command[n - 1] == ' ')
7438 command[n - 1] = '\0';
7443 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7445 #if defined (HAVE_PSTATUS_T)
7447 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
7449 if (note->descsz == sizeof (pstatus_t)
7450 #if defined (HAVE_PXSTATUS_T)
7451 || note->descsz == sizeof (pxstatus_t)
7457 memcpy (&pstat, note->descdata, sizeof (pstat));
7459 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7461 #if defined (HAVE_PSTATUS32_T)
7462 else if (note->descsz == sizeof (pstatus32_t))
7464 /* 64-bit host, 32-bit corefile */
7467 memcpy (&pstat, note->descdata, sizeof (pstat));
7469 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7472 /* Could grab some more details from the "representative"
7473 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7474 NT_LWPSTATUS note, presumably. */
7478 #endif /* defined (HAVE_PSTATUS_T) */
7480 #if defined (HAVE_LWPSTATUS_T)
7482 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
7484 lwpstatus_t lwpstat;
7490 if (note->descsz != sizeof (lwpstat)
7491 #if defined (HAVE_LWPXSTATUS_T)
7492 && note->descsz != sizeof (lwpxstatus_t)
7497 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
7499 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
7500 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
7502 /* Make a ".reg/999" section. */
7504 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
7505 len = strlen (buf) + 1;
7506 name = bfd_alloc (abfd, len);
7509 memcpy (name, buf, len);
7511 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7515 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7516 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
7517 sect->filepos = note->descpos
7518 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
7521 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7522 sect->size = sizeof (lwpstat.pr_reg);
7523 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
7526 sect->alignment_power = 2;
7528 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
7531 /* Make a ".reg2/999" section */
7533 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
7534 len = strlen (buf) + 1;
7535 name = bfd_alloc (abfd, len);
7538 memcpy (name, buf, len);
7540 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7544 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7545 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
7546 sect->filepos = note->descpos
7547 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
7550 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7551 sect->size = sizeof (lwpstat.pr_fpreg);
7552 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
7555 sect->alignment_power = 2;
7557 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
7559 #endif /* defined (HAVE_LWPSTATUS_T) */
7561 #if defined (HAVE_WIN32_PSTATUS_T)
7563 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
7569 win32_pstatus_t pstatus;
7571 if (note->descsz < sizeof (pstatus))
7574 memcpy (&pstatus, note->descdata, sizeof (pstatus));
7576 switch (pstatus.data_type)
7578 case NOTE_INFO_PROCESS:
7579 /* FIXME: need to add ->core_command. */
7580 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
7581 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
7584 case NOTE_INFO_THREAD:
7585 /* Make a ".reg/999" section. */
7586 sprintf (buf, ".reg/%ld", (long) pstatus.data.thread_info.tid);
7588 len = strlen (buf) + 1;
7589 name = bfd_alloc (abfd, len);
7593 memcpy (name, buf, len);
7595 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7599 sect->size = sizeof (pstatus.data.thread_info.thread_context);
7600 sect->filepos = (note->descpos
7601 + offsetof (struct win32_pstatus,
7602 data.thread_info.thread_context));
7603 sect->alignment_power = 2;
7605 if (pstatus.data.thread_info.is_active_thread)
7606 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
7610 case NOTE_INFO_MODULE:
7611 /* Make a ".module/xxxxxxxx" section. */
7612 sprintf (buf, ".module/%08lx",
7613 (long) pstatus.data.module_info.base_address);
7615 len = strlen (buf) + 1;
7616 name = bfd_alloc (abfd, len);
7620 memcpy (name, buf, len);
7622 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7627 sect->size = note->descsz;
7628 sect->filepos = note->descpos;
7629 sect->alignment_power = 2;
7638 #endif /* HAVE_WIN32_PSTATUS_T */
7641 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
7643 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7651 if (bed->elf_backend_grok_prstatus)
7652 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
7654 #if defined (HAVE_PRSTATUS_T)
7655 return elfcore_grok_prstatus (abfd, note);
7660 #if defined (HAVE_PSTATUS_T)
7662 return elfcore_grok_pstatus (abfd, note);
7665 #if defined (HAVE_LWPSTATUS_T)
7667 return elfcore_grok_lwpstatus (abfd, note);
7670 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
7671 return elfcore_grok_prfpreg (abfd, note);
7673 #if defined (HAVE_WIN32_PSTATUS_T)
7674 case NT_WIN32PSTATUS:
7675 return elfcore_grok_win32pstatus (abfd, note);
7678 case NT_PRXFPREG: /* Linux SSE extension */
7679 if (note->namesz == 6
7680 && strcmp (note->namedata, "LINUX") == 0)
7681 return elfcore_grok_prxfpreg (abfd, note);
7687 if (bed->elf_backend_grok_psinfo)
7688 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
7690 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7691 return elfcore_grok_psinfo (abfd, note);
7698 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
7703 sect->size = note->descsz;
7704 sect->filepos = note->descpos;
7705 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
7713 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
7717 cp = strchr (note->namedata, '@');
7720 *lwpidp = atoi(cp + 1);
7727 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
7729 /* Signal number at offset 0x08. */
7730 elf_tdata (abfd)->core_signal
7731 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
7733 /* Process ID at offset 0x50. */
7734 elf_tdata (abfd)->core_pid
7735 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
7737 /* Command name at 0x7c (max 32 bytes, including nul). */
7738 elf_tdata (abfd)->core_command
7739 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
7741 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
7746 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
7750 if (elfcore_netbsd_get_lwpid (note, &lwp))
7751 elf_tdata (abfd)->core_lwpid = lwp;
7753 if (note->type == NT_NETBSDCORE_PROCINFO)
7755 /* NetBSD-specific core "procinfo". Note that we expect to
7756 find this note before any of the others, which is fine,
7757 since the kernel writes this note out first when it
7758 creates a core file. */
7760 return elfcore_grok_netbsd_procinfo (abfd, note);
7763 /* As of Jan 2002 there are no other machine-independent notes
7764 defined for NetBSD core files. If the note type is less
7765 than the start of the machine-dependent note types, we don't
7768 if (note->type < NT_NETBSDCORE_FIRSTMACH)
7772 switch (bfd_get_arch (abfd))
7774 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7775 PT_GETFPREGS == mach+2. */
7777 case bfd_arch_alpha:
7778 case bfd_arch_sparc:
7781 case NT_NETBSDCORE_FIRSTMACH+0:
7782 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7784 case NT_NETBSDCORE_FIRSTMACH+2:
7785 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7791 /* On all other arch's, PT_GETREGS == mach+1 and
7792 PT_GETFPREGS == mach+3. */
7797 case NT_NETBSDCORE_FIRSTMACH+1:
7798 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7800 case NT_NETBSDCORE_FIRSTMACH+3:
7801 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7811 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, long *tid)
7813 void *ddata = note->descdata;
7820 /* nto_procfs_status 'pid' field is at offset 0. */
7821 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
7823 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7824 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
7826 /* nto_procfs_status 'flags' field is at offset 8. */
7827 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
7829 /* nto_procfs_status 'what' field is at offset 14. */
7830 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
7832 elf_tdata (abfd)->core_signal = sig;
7833 elf_tdata (abfd)->core_lwpid = *tid;
7836 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7837 do not come from signals so we make sure we set the current
7838 thread just in case. */
7839 if (flags & 0x00000080)
7840 elf_tdata (abfd)->core_lwpid = *tid;
7842 /* Make a ".qnx_core_status/%d" section. */
7843 sprintf (buf, ".qnx_core_status/%ld", *tid);
7845 name = bfd_alloc (abfd, strlen (buf) + 1);
7850 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7854 sect->size = note->descsz;
7855 sect->filepos = note->descpos;
7856 sect->alignment_power = 2;
7858 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
7862 elfcore_grok_nto_regs (bfd *abfd,
7863 Elf_Internal_Note *note,
7871 /* Make a "(base)/%d" section. */
7872 sprintf (buf, "%s/%ld", base, tid);
7874 name = bfd_alloc (abfd, strlen (buf) + 1);
7879 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
7883 sect->size = note->descsz;
7884 sect->filepos = note->descpos;
7885 sect->alignment_power = 2;
7887 /* This is the current thread. */
7888 if (elf_tdata (abfd)->core_lwpid == tid)
7889 return elfcore_maybe_make_sect (abfd, base, sect);
7894 #define BFD_QNT_CORE_INFO 7
7895 #define BFD_QNT_CORE_STATUS 8
7896 #define BFD_QNT_CORE_GREG 9
7897 #define BFD_QNT_CORE_FPREG 10
7900 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
7902 /* Every GREG section has a STATUS section before it. Store the
7903 tid from the previous call to pass down to the next gregs
7905 static long tid = 1;
7909 case BFD_QNT_CORE_INFO:
7910 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
7911 case BFD_QNT_CORE_STATUS:
7912 return elfcore_grok_nto_status (abfd, note, &tid);
7913 case BFD_QNT_CORE_GREG:
7914 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
7915 case BFD_QNT_CORE_FPREG:
7916 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
7922 /* Function: elfcore_write_note
7925 buffer to hold note, and current size of buffer
7929 size of data for note
7931 Writes note to end of buffer. ELF64 notes are written exactly as
7932 for ELF32, despite the current (as of 2006) ELF gabi specifying
7933 that they ought to have 8-byte namesz and descsz field, and have
7934 8-byte alignment. Other writers, eg. Linux kernel, do the same.
7937 Pointer to realloc'd buffer, *BUFSIZ updated. */
7940 elfcore_write_note (bfd *abfd,
7948 Elf_External_Note *xnp;
7955 namesz = strlen (name) + 1;
7957 newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4);
7959 buf = realloc (buf, *bufsiz + newspace);
7960 dest = buf + *bufsiz;
7961 *bufsiz += newspace;
7962 xnp = (Elf_External_Note *) dest;
7963 H_PUT_32 (abfd, namesz, xnp->namesz);
7964 H_PUT_32 (abfd, size, xnp->descsz);
7965 H_PUT_32 (abfd, type, xnp->type);
7969 memcpy (dest, name, namesz);
7977 memcpy (dest, input, size);
7987 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7989 elfcore_write_prpsinfo (bfd *abfd,
7995 const char *note_name = "CORE";
7996 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7998 if (bed->elf_backend_write_core_note != NULL)
8001 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8002 NT_PRPSINFO, fname, psargs);
8007 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
8008 if (bed->s->elfclass == ELFCLASS32)
8010 #if defined (HAVE_PSINFO32_T)
8012 int note_type = NT_PSINFO;
8015 int note_type = NT_PRPSINFO;
8018 memset (&data, 0, sizeof (data));
8019 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8020 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8021 return elfcore_write_note (abfd, buf, bufsiz,
8022 note_name, note_type, &data, sizeof (data));
8027 #if defined (HAVE_PSINFO_T)
8029 int note_type = NT_PSINFO;
8032 int note_type = NT_PRPSINFO;
8035 memset (&data, 0, sizeof (data));
8036 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8037 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8038 return elfcore_write_note (abfd, buf, bufsiz,
8039 note_name, note_type, &data, sizeof (data));
8042 #endif /* PSINFO_T or PRPSINFO_T */
8044 #if defined (HAVE_PRSTATUS_T)
8046 elfcore_write_prstatus (bfd *abfd,
8053 const char *note_name = "CORE";
8054 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8056 if (bed->elf_backend_write_core_note != NULL)
8059 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8061 pid, cursig, gregs);
8066 #if defined (HAVE_PRSTATUS32_T)
8067 if (bed->s->elfclass == ELFCLASS32)
8069 prstatus32_t prstat;
8071 memset (&prstat, 0, sizeof (prstat));
8072 prstat.pr_pid = pid;
8073 prstat.pr_cursig = cursig;
8074 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8075 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8076 NT_PRSTATUS, &prstat, sizeof (prstat));
8083 memset (&prstat, 0, sizeof (prstat));
8084 prstat.pr_pid = pid;
8085 prstat.pr_cursig = cursig;
8086 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8087 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8088 NT_PRSTATUS, &prstat, sizeof (prstat));
8091 #endif /* HAVE_PRSTATUS_T */
8093 #if defined (HAVE_LWPSTATUS_T)
8095 elfcore_write_lwpstatus (bfd *abfd,
8102 lwpstatus_t lwpstat;
8103 const char *note_name = "CORE";
8105 memset (&lwpstat, 0, sizeof (lwpstat));
8106 lwpstat.pr_lwpid = pid >> 16;
8107 lwpstat.pr_cursig = cursig;
8108 #if defined (HAVE_LWPSTATUS_T_PR_REG)
8109 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
8110 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8112 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
8113 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
8115 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
8116 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
8119 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8120 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
8122 #endif /* HAVE_LWPSTATUS_T */
8124 #if defined (HAVE_PSTATUS_T)
8126 elfcore_write_pstatus (bfd *abfd,
8130 int cursig ATTRIBUTE_UNUSED,
8131 const void *gregs ATTRIBUTE_UNUSED)
8133 const char *note_name = "CORE";
8134 #if defined (HAVE_PSTATUS32_T)
8135 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8137 if (bed->s->elfclass == ELFCLASS32)
8141 memset (&pstat, 0, sizeof (pstat));
8142 pstat.pr_pid = pid & 0xffff;
8143 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8144 NT_PSTATUS, &pstat, sizeof (pstat));
8152 memset (&pstat, 0, sizeof (pstat));
8153 pstat.pr_pid = pid & 0xffff;
8154 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8155 NT_PSTATUS, &pstat, sizeof (pstat));
8159 #endif /* HAVE_PSTATUS_T */
8162 elfcore_write_prfpreg (bfd *abfd,
8168 const char *note_name = "CORE";
8169 return elfcore_write_note (abfd, buf, bufsiz,
8170 note_name, NT_FPREGSET, fpregs, size);
8174 elfcore_write_prxfpreg (bfd *abfd,
8177 const void *xfpregs,
8180 char *note_name = "LINUX";
8181 return elfcore_write_note (abfd, buf, bufsiz,
8182 note_name, NT_PRXFPREG, xfpregs, size);
8186 elfcore_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
8194 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
8197 buf = bfd_malloc (size);
8201 if (bfd_bread (buf, size, abfd) != size)
8209 while (p < buf + size)
8211 /* FIXME: bad alignment assumption. */
8212 Elf_External_Note *xnp = (Elf_External_Note *) p;
8213 Elf_Internal_Note in;
8215 in.type = H_GET_32 (abfd, xnp->type);
8217 in.namesz = H_GET_32 (abfd, xnp->namesz);
8218 in.namedata = xnp->name;
8220 in.descsz = H_GET_32 (abfd, xnp->descsz);
8221 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
8222 in.descpos = offset + (in.descdata - buf);
8224 if (CONST_STRNEQ (in.namedata, "NetBSD-CORE"))
8226 if (! elfcore_grok_netbsd_note (abfd, &in))
8229 else if (CONST_STRNEQ (in.namedata, "QNX"))
8231 if (! elfcore_grok_nto_note (abfd, &in))
8236 if (! elfcore_grok_note (abfd, &in))
8240 p = in.descdata + BFD_ALIGN (in.descsz, 4);
8247 /* Providing external access to the ELF program header table. */
8249 /* Return an upper bound on the number of bytes required to store a
8250 copy of ABFD's program header table entries. Return -1 if an error
8251 occurs; bfd_get_error will return an appropriate code. */
8254 bfd_get_elf_phdr_upper_bound (bfd *abfd)
8256 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8258 bfd_set_error (bfd_error_wrong_format);
8262 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
8265 /* Copy ABFD's program header table entries to *PHDRS. The entries
8266 will be stored as an array of Elf_Internal_Phdr structures, as
8267 defined in include/elf/internal.h. To find out how large the
8268 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
8270 Return the number of program header table entries read, or -1 if an
8271 error occurs; bfd_get_error will return an appropriate code. */
8274 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
8278 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8280 bfd_set_error (bfd_error_wrong_format);
8284 num_phdrs = elf_elfheader (abfd)->e_phnum;
8285 memcpy (phdrs, elf_tdata (abfd)->phdr,
8286 num_phdrs * sizeof (Elf_Internal_Phdr));
8292 _bfd_elf_sprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, char *buf, bfd_vma value)
8295 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
8297 i_ehdrp = elf_elfheader (abfd);
8298 if (i_ehdrp == NULL)
8299 sprintf_vma (buf, value);
8302 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
8304 #if BFD_HOST_64BIT_LONG
8305 sprintf (buf, "%016lx", value);
8307 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value),
8308 _bfd_int64_low (value));
8312 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff));
8315 sprintf_vma (buf, value);
8320 _bfd_elf_fprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, void *stream, bfd_vma value)
8323 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
8325 i_ehdrp = elf_elfheader (abfd);
8326 if (i_ehdrp == NULL)
8327 fprintf_vma ((FILE *) stream, value);
8330 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
8332 #if BFD_HOST_64BIT_LONG
8333 fprintf ((FILE *) stream, "%016lx", value);
8335 fprintf ((FILE *) stream, "%08lx%08lx",
8336 _bfd_int64_high (value), _bfd_int64_low (value));
8340 fprintf ((FILE *) stream, "%08lx",
8341 (unsigned long) (value & 0xffffffff));
8344 fprintf_vma ((FILE *) stream, value);
8348 enum elf_reloc_type_class
8349 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
8351 return reloc_class_normal;
8354 /* For RELA architectures, return the relocation value for a
8355 relocation against a local symbol. */
8358 _bfd_elf_rela_local_sym (bfd *abfd,
8359 Elf_Internal_Sym *sym,
8361 Elf_Internal_Rela *rel)
8363 asection *sec = *psec;
8366 relocation = (sec->output_section->vma
8367 + sec->output_offset
8369 if ((sec->flags & SEC_MERGE)
8370 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
8371 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
8374 _bfd_merged_section_offset (abfd, psec,
8375 elf_section_data (sec)->sec_info,
8376 sym->st_value + rel->r_addend);
8379 /* If we have changed the section, and our original section is
8380 marked with SEC_EXCLUDE, it means that the original
8381 SEC_MERGE section has been completely subsumed in some
8382 other SEC_MERGE section. In this case, we need to leave
8383 some info around for --emit-relocs. */
8384 if ((sec->flags & SEC_EXCLUDE) != 0)
8385 sec->kept_section = *psec;
8388 rel->r_addend -= relocation;
8389 rel->r_addend += sec->output_section->vma + sec->output_offset;
8395 _bfd_elf_rel_local_sym (bfd *abfd,
8396 Elf_Internal_Sym *sym,
8400 asection *sec = *psec;
8402 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
8403 return sym->st_value + addend;
8405 return _bfd_merged_section_offset (abfd, psec,
8406 elf_section_data (sec)->sec_info,
8407 sym->st_value + addend);
8411 _bfd_elf_section_offset (bfd *abfd,
8412 struct bfd_link_info *info,
8416 switch (sec->sec_info_type)
8418 case ELF_INFO_TYPE_STABS:
8419 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
8421 case ELF_INFO_TYPE_EH_FRAME:
8422 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
8428 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8429 reconstruct an ELF file by reading the segments out of remote memory
8430 based on the ELF file header at EHDR_VMA and the ELF program headers it
8431 points to. If not null, *LOADBASEP is filled in with the difference
8432 between the VMAs from which the segments were read, and the VMAs the
8433 file headers (and hence BFD's idea of each section's VMA) put them at.
8435 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8436 remote memory at target address VMA into the local buffer at MYADDR; it
8437 should return zero on success or an `errno' code on failure. TEMPL must
8438 be a BFD for an ELF target with the word size and byte order found in
8439 the remote memory. */
8442 bfd_elf_bfd_from_remote_memory
8446 int (*target_read_memory) (bfd_vma, bfd_byte *, int))
8448 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
8449 (templ, ehdr_vma, loadbasep, target_read_memory);
8453 _bfd_elf_get_synthetic_symtab (bfd *abfd,
8454 long symcount ATTRIBUTE_UNUSED,
8455 asymbol **syms ATTRIBUTE_UNUSED,
8460 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8463 const char *relplt_name;
8464 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
8468 Elf_Internal_Shdr *hdr;
8474 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
8477 if (dynsymcount <= 0)
8480 if (!bed->plt_sym_val)
8483 relplt_name = bed->relplt_name;
8484 if (relplt_name == NULL)
8485 relplt_name = bed->default_use_rela_p ? ".rela.plt" : ".rel.plt";
8486 relplt = bfd_get_section_by_name (abfd, relplt_name);
8490 hdr = &elf_section_data (relplt)->this_hdr;
8491 if (hdr->sh_link != elf_dynsymtab (abfd)
8492 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
8495 plt = bfd_get_section_by_name (abfd, ".plt");
8499 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
8500 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
8503 count = relplt->size / hdr->sh_entsize;
8504 size = count * sizeof (asymbol);
8505 p = relplt->relocation;
8506 for (i = 0; i < count; i++, p++)
8507 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
8509 s = *ret = bfd_malloc (size);
8513 names = (char *) (s + count);
8514 p = relplt->relocation;
8516 for (i = 0; i < count; i++, s++, p++)
8521 addr = bed->plt_sym_val (i, plt, p);
8522 if (addr == (bfd_vma) -1)
8525 *s = **p->sym_ptr_ptr;
8526 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
8527 we are defining a symbol, ensure one of them is set. */
8528 if ((s->flags & BSF_LOCAL) == 0)
8529 s->flags |= BSF_GLOBAL;
8531 s->value = addr - plt->vma;
8533 len = strlen ((*p->sym_ptr_ptr)->name);
8534 memcpy (names, (*p->sym_ptr_ptr)->name, len);
8536 memcpy (names, "@plt", sizeof ("@plt"));
8537 names += sizeof ("@plt");
8544 /* It is only used by x86-64 so far. */
8545 asection _bfd_elf_large_com_section
8546 = BFD_FAKE_SECTION (_bfd_elf_large_com_section,
8547 SEC_IS_COMMON, NULL, "LARGE_COMMON", 0);
8550 _bfd_elf_set_osabi (bfd * abfd,
8551 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
8553 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
8555 i_ehdrp = elf_elfheader (abfd);
8557 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
8561 /* Return TRUE for ELF symbol types that represent functions.
8562 This is the default version of this function, which is sufficient for
8563 most targets. It returns true if TYPE is STT_FUNC. */
8566 _bfd_elf_is_function_type (unsigned int type)
8568 return (type == STT_FUNC);