1 /* ELF executable support for BFD.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
5 Free Software Foundation, Inc.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
29 BFD support for ELF formats is being worked on.
30 Currently, the best supported back ends are for sparc and i386
31 (running svr4 or Solaris 2).
33 Documentation of the internals of the support code still needs
34 to be written. The code is changing quickly enough that we
35 haven't bothered yet. */
37 /* For sparc64-cross-sparc32. */
45 #include "libiberty.h"
46 #include "safe-ctype.h"
52 static int elf_sort_sections (const void *, const void *);
53 static bfd_boolean assign_file_positions_except_relocs (bfd *, struct bfd_link_info *);
54 static bfd_boolean prep_headers (bfd *);
55 static bfd_boolean swap_out_syms (bfd *, struct bfd_strtab_hash **, int) ;
56 static bfd_boolean elf_read_notes (bfd *, file_ptr, bfd_size_type) ;
57 static bfd_boolean elf_parse_notes (bfd *abfd, char *buf, size_t size,
60 /* Swap version information in and out. The version information is
61 currently size independent. If that ever changes, this code will
62 need to move into elfcode.h. */
64 /* Swap in a Verdef structure. */
67 _bfd_elf_swap_verdef_in (bfd *abfd,
68 const Elf_External_Verdef *src,
69 Elf_Internal_Verdef *dst)
71 dst->vd_version = H_GET_16 (abfd, src->vd_version);
72 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
73 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
74 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
75 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
76 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
77 dst->vd_next = H_GET_32 (abfd, src->vd_next);
80 /* Swap out a Verdef structure. */
83 _bfd_elf_swap_verdef_out (bfd *abfd,
84 const Elf_Internal_Verdef *src,
85 Elf_External_Verdef *dst)
87 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
88 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
89 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
90 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
91 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
92 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
93 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
96 /* Swap in a Verdaux structure. */
99 _bfd_elf_swap_verdaux_in (bfd *abfd,
100 const Elf_External_Verdaux *src,
101 Elf_Internal_Verdaux *dst)
103 dst->vda_name = H_GET_32 (abfd, src->vda_name);
104 dst->vda_next = H_GET_32 (abfd, src->vda_next);
107 /* Swap out a Verdaux structure. */
110 _bfd_elf_swap_verdaux_out (bfd *abfd,
111 const Elf_Internal_Verdaux *src,
112 Elf_External_Verdaux *dst)
114 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
115 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
118 /* Swap in a Verneed structure. */
121 _bfd_elf_swap_verneed_in (bfd *abfd,
122 const Elf_External_Verneed *src,
123 Elf_Internal_Verneed *dst)
125 dst->vn_version = H_GET_16 (abfd, src->vn_version);
126 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
127 dst->vn_file = H_GET_32 (abfd, src->vn_file);
128 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
129 dst->vn_next = H_GET_32 (abfd, src->vn_next);
132 /* Swap out a Verneed structure. */
135 _bfd_elf_swap_verneed_out (bfd *abfd,
136 const Elf_Internal_Verneed *src,
137 Elf_External_Verneed *dst)
139 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
140 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
141 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
142 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
143 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
146 /* Swap in a Vernaux structure. */
149 _bfd_elf_swap_vernaux_in (bfd *abfd,
150 const Elf_External_Vernaux *src,
151 Elf_Internal_Vernaux *dst)
153 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
154 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
155 dst->vna_other = H_GET_16 (abfd, src->vna_other);
156 dst->vna_name = H_GET_32 (abfd, src->vna_name);
157 dst->vna_next = H_GET_32 (abfd, src->vna_next);
160 /* Swap out a Vernaux structure. */
163 _bfd_elf_swap_vernaux_out (bfd *abfd,
164 const Elf_Internal_Vernaux *src,
165 Elf_External_Vernaux *dst)
167 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
168 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
169 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
170 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
171 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
174 /* Swap in a Versym structure. */
177 _bfd_elf_swap_versym_in (bfd *abfd,
178 const Elf_External_Versym *src,
179 Elf_Internal_Versym *dst)
181 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
184 /* Swap out a Versym structure. */
187 _bfd_elf_swap_versym_out (bfd *abfd,
188 const Elf_Internal_Versym *src,
189 Elf_External_Versym *dst)
191 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
194 /* Standard ELF hash function. Do not change this function; you will
195 cause invalid hash tables to be generated. */
198 bfd_elf_hash (const char *namearg)
200 const unsigned char *name = (const unsigned char *) namearg;
205 while ((ch = *name++) != '\0')
208 if ((g = (h & 0xf0000000)) != 0)
211 /* The ELF ABI says `h &= ~g', but this is equivalent in
212 this case and on some machines one insn instead of two. */
216 return h & 0xffffffff;
219 /* DT_GNU_HASH hash function. Do not change this function; you will
220 cause invalid hash tables to be generated. */
223 bfd_elf_gnu_hash (const char *namearg)
225 const unsigned char *name = (const unsigned char *) namearg;
226 unsigned long h = 5381;
229 while ((ch = *name++) != '\0')
230 h = (h << 5) + h + ch;
231 return h & 0xffffffff;
234 /* Create a tdata field OBJECT_SIZE bytes in length, zeroed out and with
235 the object_id field of an elf_obj_tdata field set to OBJECT_ID. */
237 bfd_elf_allocate_object (bfd *abfd,
239 enum elf_target_id object_id)
241 BFD_ASSERT (object_size >= sizeof (struct elf_obj_tdata));
242 abfd->tdata.any = bfd_zalloc (abfd, object_size);
243 if (abfd->tdata.any == NULL)
246 elf_object_id (abfd) = object_id;
247 elf_program_header_size (abfd) = (bfd_size_type) -1;
253 bfd_elf_make_object (bfd *abfd)
255 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
256 return bfd_elf_allocate_object (abfd, sizeof (struct elf_obj_tdata),
261 bfd_elf_mkcorefile (bfd *abfd)
263 /* I think this can be done just like an object file. */
264 return abfd->xvec->_bfd_set_format[(int) bfd_object] (abfd);
268 bfd_elf_get_str_section (bfd *abfd, unsigned int shindex)
270 Elf_Internal_Shdr **i_shdrp;
271 bfd_byte *shstrtab = NULL;
273 bfd_size_type shstrtabsize;
275 i_shdrp = elf_elfsections (abfd);
277 || shindex >= elf_numsections (abfd)
278 || i_shdrp[shindex] == 0)
281 shstrtab = i_shdrp[shindex]->contents;
282 if (shstrtab == NULL)
284 /* No cached one, attempt to read, and cache what we read. */
285 offset = i_shdrp[shindex]->sh_offset;
286 shstrtabsize = i_shdrp[shindex]->sh_size;
288 /* Allocate and clear an extra byte at the end, to prevent crashes
289 in case the string table is not terminated. */
290 if (shstrtabsize + 1 <= 1
291 || (shstrtab = (bfd_byte *) bfd_alloc (abfd, shstrtabsize + 1)) == NULL
292 || bfd_seek (abfd, offset, SEEK_SET) != 0)
294 else if (bfd_bread (shstrtab, shstrtabsize, abfd) != shstrtabsize)
296 if (bfd_get_error () != bfd_error_system_call)
297 bfd_set_error (bfd_error_file_truncated);
299 /* Once we've failed to read it, make sure we don't keep
300 trying. Otherwise, we'll keep allocating space for
301 the string table over and over. */
302 i_shdrp[shindex]->sh_size = 0;
305 shstrtab[shstrtabsize] = '\0';
306 i_shdrp[shindex]->contents = shstrtab;
308 return (char *) shstrtab;
312 bfd_elf_string_from_elf_section (bfd *abfd,
313 unsigned int shindex,
314 unsigned int strindex)
316 Elf_Internal_Shdr *hdr;
321 if (elf_elfsections (abfd) == NULL || shindex >= elf_numsections (abfd))
324 hdr = elf_elfsections (abfd)[shindex];
326 if (hdr->contents == NULL
327 && bfd_elf_get_str_section (abfd, shindex) == NULL)
330 if (strindex >= hdr->sh_size)
332 unsigned int shstrndx = elf_elfheader(abfd)->e_shstrndx;
333 (*_bfd_error_handler)
334 (_("%B: invalid string offset %u >= %lu for section `%s'"),
335 abfd, strindex, (unsigned long) hdr->sh_size,
336 (shindex == shstrndx && strindex == hdr->sh_name
338 : bfd_elf_string_from_elf_section (abfd, shstrndx, hdr->sh_name)));
342 return ((char *) hdr->contents) + strindex;
345 /* Read and convert symbols to internal format.
346 SYMCOUNT specifies the number of symbols to read, starting from
347 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
348 are non-NULL, they are used to store the internal symbols, external
349 symbols, and symbol section index extensions, respectively.
350 Returns a pointer to the internal symbol buffer (malloced if necessary)
351 or NULL if there were no symbols or some kind of problem. */
354 bfd_elf_get_elf_syms (bfd *ibfd,
355 Elf_Internal_Shdr *symtab_hdr,
358 Elf_Internal_Sym *intsym_buf,
360 Elf_External_Sym_Shndx *extshndx_buf)
362 Elf_Internal_Shdr *shndx_hdr;
364 const bfd_byte *esym;
365 Elf_External_Sym_Shndx *alloc_extshndx;
366 Elf_External_Sym_Shndx *shndx;
367 Elf_Internal_Sym *alloc_intsym;
368 Elf_Internal_Sym *isym;
369 Elf_Internal_Sym *isymend;
370 const struct elf_backend_data *bed;
375 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
381 /* Normal syms might have section extension entries. */
383 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr)
384 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr;
386 /* Read the symbols. */
388 alloc_extshndx = NULL;
390 bed = get_elf_backend_data (ibfd);
391 extsym_size = bed->s->sizeof_sym;
392 amt = symcount * extsym_size;
393 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
394 if (extsym_buf == NULL)
396 alloc_ext = bfd_malloc2 (symcount, extsym_size);
397 extsym_buf = alloc_ext;
399 if (extsym_buf == NULL
400 || bfd_seek (ibfd, pos, SEEK_SET) != 0
401 || bfd_bread (extsym_buf, amt, ibfd) != amt)
407 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
411 amt = symcount * sizeof (Elf_External_Sym_Shndx);
412 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
413 if (extshndx_buf == NULL)
415 alloc_extshndx = (Elf_External_Sym_Shndx *)
416 bfd_malloc2 (symcount, sizeof (Elf_External_Sym_Shndx));
417 extshndx_buf = alloc_extshndx;
419 if (extshndx_buf == NULL
420 || bfd_seek (ibfd, pos, SEEK_SET) != 0
421 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
428 if (intsym_buf == NULL)
430 alloc_intsym = (Elf_Internal_Sym *)
431 bfd_malloc2 (symcount, sizeof (Elf_Internal_Sym));
432 intsym_buf = alloc_intsym;
433 if (intsym_buf == NULL)
437 /* Convert the symbols to internal form. */
438 isymend = intsym_buf + symcount;
439 for (esym = (const bfd_byte *) extsym_buf, isym = intsym_buf,
440 shndx = extshndx_buf;
442 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
443 if (!(*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym))
445 symoffset += (esym - (bfd_byte *) extsym_buf) / extsym_size;
446 (*_bfd_error_handler) (_("%B symbol number %lu references "
447 "nonexistent SHT_SYMTAB_SHNDX section"),
448 ibfd, (unsigned long) symoffset);
449 if (alloc_intsym != NULL)
456 if (alloc_ext != NULL)
458 if (alloc_extshndx != NULL)
459 free (alloc_extshndx);
464 /* Look up a symbol name. */
466 bfd_elf_sym_name (bfd *abfd,
467 Elf_Internal_Shdr *symtab_hdr,
468 Elf_Internal_Sym *isym,
472 unsigned int iname = isym->st_name;
473 unsigned int shindex = symtab_hdr->sh_link;
475 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
476 /* Check for a bogus st_shndx to avoid crashing. */
477 && isym->st_shndx < elf_numsections (abfd))
479 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
480 shindex = elf_elfheader (abfd)->e_shstrndx;
483 name = bfd_elf_string_from_elf_section (abfd, shindex, iname);
486 else if (sym_sec && *name == '\0')
487 name = bfd_section_name (abfd, sym_sec);
492 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
493 sections. The first element is the flags, the rest are section
496 typedef union elf_internal_group {
497 Elf_Internal_Shdr *shdr;
499 } Elf_Internal_Group;
501 /* Return the name of the group signature symbol. Why isn't the
502 signature just a string? */
505 group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
507 Elf_Internal_Shdr *hdr;
508 unsigned char esym[sizeof (Elf64_External_Sym)];
509 Elf_External_Sym_Shndx eshndx;
510 Elf_Internal_Sym isym;
512 /* First we need to ensure the symbol table is available. Make sure
513 that it is a symbol table section. */
514 if (ghdr->sh_link >= elf_numsections (abfd))
516 hdr = elf_elfsections (abfd) [ghdr->sh_link];
517 if (hdr->sh_type != SHT_SYMTAB
518 || ! bfd_section_from_shdr (abfd, ghdr->sh_link))
521 /* Go read the symbol. */
522 hdr = &elf_tdata (abfd)->symtab_hdr;
523 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
524 &isym, esym, &eshndx) == NULL)
527 return bfd_elf_sym_name (abfd, hdr, &isym, NULL);
530 /* Set next_in_group list pointer, and group name for NEWSECT. */
533 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
535 unsigned int num_group = elf_tdata (abfd)->num_group;
537 /* If num_group is zero, read in all SHT_GROUP sections. The count
538 is set to -1 if there are no SHT_GROUP sections. */
541 unsigned int i, shnum;
543 /* First count the number of groups. If we have a SHT_GROUP
544 section with just a flag word (ie. sh_size is 4), ignore it. */
545 shnum = elf_numsections (abfd);
548 #define IS_VALID_GROUP_SECTION_HEADER(shdr, minsize) \
549 ( (shdr)->sh_type == SHT_GROUP \
550 && (shdr)->sh_size >= minsize \
551 && (shdr)->sh_entsize == GRP_ENTRY_SIZE \
552 && ((shdr)->sh_size % GRP_ENTRY_SIZE) == 0)
554 for (i = 0; i < shnum; i++)
556 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
558 if (IS_VALID_GROUP_SECTION_HEADER (shdr, 2 * GRP_ENTRY_SIZE))
564 num_group = (unsigned) -1;
565 elf_tdata (abfd)->num_group = num_group;
569 /* We keep a list of elf section headers for group sections,
570 so we can find them quickly. */
573 elf_tdata (abfd)->num_group = num_group;
574 elf_tdata (abfd)->group_sect_ptr = (Elf_Internal_Shdr **)
575 bfd_alloc2 (abfd, num_group, sizeof (Elf_Internal_Shdr *));
576 if (elf_tdata (abfd)->group_sect_ptr == NULL)
580 for (i = 0; i < shnum; i++)
582 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
584 if (IS_VALID_GROUP_SECTION_HEADER (shdr, 2 * GRP_ENTRY_SIZE))
587 Elf_Internal_Group *dest;
589 /* Add to list of sections. */
590 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
593 /* Read the raw contents. */
594 BFD_ASSERT (sizeof (*dest) >= 4);
595 amt = shdr->sh_size * sizeof (*dest) / 4;
596 shdr->contents = (unsigned char *)
597 bfd_alloc2 (abfd, shdr->sh_size, sizeof (*dest) / 4);
598 /* PR binutils/4110: Handle corrupt group headers. */
599 if (shdr->contents == NULL)
602 (_("%B: Corrupt size field in group section header: 0x%lx"), abfd, shdr->sh_size);
603 bfd_set_error (bfd_error_bad_value);
607 memset (shdr->contents, 0, amt);
609 if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
610 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
614 /* Translate raw contents, a flag word followed by an
615 array of elf section indices all in target byte order,
616 to the flag word followed by an array of elf section
618 src = shdr->contents + shdr->sh_size;
619 dest = (Elf_Internal_Group *) (shdr->contents + amt);
626 idx = H_GET_32 (abfd, src);
627 if (src == shdr->contents)
630 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
631 shdr->bfd_section->flags
632 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
637 ((*_bfd_error_handler)
638 (_("%B: invalid SHT_GROUP entry"), abfd));
641 dest->shdr = elf_elfsections (abfd)[idx];
648 if (num_group != (unsigned) -1)
652 for (i = 0; i < num_group; i++)
654 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
655 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
656 unsigned int n_elt = shdr->sh_size / 4;
658 /* Look through this group's sections to see if current
659 section is a member. */
661 if ((++idx)->shdr == hdr)
665 /* We are a member of this group. Go looking through
666 other members to see if any others are linked via
668 idx = (Elf_Internal_Group *) shdr->contents;
669 n_elt = shdr->sh_size / 4;
671 if ((s = (++idx)->shdr->bfd_section) != NULL
672 && elf_next_in_group (s) != NULL)
676 /* Snarf the group name from other member, and
677 insert current section in circular list. */
678 elf_group_name (newsect) = elf_group_name (s);
679 elf_next_in_group (newsect) = elf_next_in_group (s);
680 elf_next_in_group (s) = newsect;
686 gname = group_signature (abfd, shdr);
689 elf_group_name (newsect) = gname;
691 /* Start a circular list with one element. */
692 elf_next_in_group (newsect) = newsect;
695 /* If the group section has been created, point to the
697 if (shdr->bfd_section != NULL)
698 elf_next_in_group (shdr->bfd_section) = newsect;
706 if (elf_group_name (newsect) == NULL)
708 (*_bfd_error_handler) (_("%B: no group info for section %A"),
715 _bfd_elf_setup_sections (bfd *abfd)
718 unsigned int num_group = elf_tdata (abfd)->num_group;
719 bfd_boolean result = TRUE;
722 /* Process SHF_LINK_ORDER. */
723 for (s = abfd->sections; s != NULL; s = s->next)
725 Elf_Internal_Shdr *this_hdr = &elf_section_data (s)->this_hdr;
726 if ((this_hdr->sh_flags & SHF_LINK_ORDER) != 0)
728 unsigned int elfsec = this_hdr->sh_link;
729 /* FIXME: The old Intel compiler and old strip/objcopy may
730 not set the sh_link or sh_info fields. Hence we could
731 get the situation where elfsec is 0. */
734 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
735 if (bed->link_order_error_handler)
736 bed->link_order_error_handler
737 (_("%B: warning: sh_link not set for section `%A'"),
742 asection *linksec = NULL;
744 if (elfsec < elf_numsections (abfd))
746 this_hdr = elf_elfsections (abfd)[elfsec];
747 linksec = this_hdr->bfd_section;
751 Some strip/objcopy may leave an incorrect value in
752 sh_link. We don't want to proceed. */
755 (*_bfd_error_handler)
756 (_("%B: sh_link [%d] in section `%A' is incorrect"),
757 s->owner, s, elfsec);
761 elf_linked_to_section (s) = linksec;
766 /* Process section groups. */
767 if (num_group == (unsigned) -1)
770 for (i = 0; i < num_group; i++)
772 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
773 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
774 unsigned int n_elt = shdr->sh_size / 4;
777 if ((++idx)->shdr->bfd_section)
778 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
779 else if (idx->shdr->sh_type == SHT_RELA
780 || idx->shdr->sh_type == SHT_REL)
781 /* We won't include relocation sections in section groups in
782 output object files. We adjust the group section size here
783 so that relocatable link will work correctly when
784 relocation sections are in section group in input object
786 shdr->bfd_section->size -= 4;
789 /* There are some unknown sections in the group. */
790 (*_bfd_error_handler)
791 (_("%B: unknown [%d] section `%s' in group [%s]"),
793 (unsigned int) idx->shdr->sh_type,
794 bfd_elf_string_from_elf_section (abfd,
795 (elf_elfheader (abfd)
798 shdr->bfd_section->name);
806 bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
808 return elf_next_in_group (sec) != NULL;
811 /* Make a BFD section from an ELF section. We store a pointer to the
812 BFD section in the bfd_section field of the header. */
815 _bfd_elf_make_section_from_shdr (bfd *abfd,
816 Elf_Internal_Shdr *hdr,
822 const struct elf_backend_data *bed;
824 if (hdr->bfd_section != NULL)
827 newsect = bfd_make_section_anyway (abfd, name);
831 hdr->bfd_section = newsect;
832 elf_section_data (newsect)->this_hdr = *hdr;
833 elf_section_data (newsect)->this_idx = shindex;
835 /* Always use the real type/flags. */
836 elf_section_type (newsect) = hdr->sh_type;
837 elf_section_flags (newsect) = hdr->sh_flags;
839 newsect->filepos = hdr->sh_offset;
841 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
842 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
843 || ! bfd_set_section_alignment (abfd, newsect,
844 bfd_log2 (hdr->sh_addralign)))
847 flags = SEC_NO_FLAGS;
848 if (hdr->sh_type != SHT_NOBITS)
849 flags |= SEC_HAS_CONTENTS;
850 if (hdr->sh_type == SHT_GROUP)
851 flags |= SEC_GROUP | SEC_EXCLUDE;
852 if ((hdr->sh_flags & SHF_ALLOC) != 0)
855 if (hdr->sh_type != SHT_NOBITS)
858 if ((hdr->sh_flags & SHF_WRITE) == 0)
859 flags |= SEC_READONLY;
860 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
862 else if ((flags & SEC_LOAD) != 0)
864 if ((hdr->sh_flags & SHF_MERGE) != 0)
867 newsect->entsize = hdr->sh_entsize;
868 if ((hdr->sh_flags & SHF_STRINGS) != 0)
869 flags |= SEC_STRINGS;
871 if (hdr->sh_flags & SHF_GROUP)
872 if (!setup_group (abfd, hdr, newsect))
874 if ((hdr->sh_flags & SHF_TLS) != 0)
875 flags |= SEC_THREAD_LOCAL;
876 if ((hdr->sh_flags & SHF_EXCLUDE) != 0)
877 flags |= SEC_EXCLUDE;
879 if ((flags & SEC_ALLOC) == 0)
881 /* The debugging sections appear to be recognized only by name,
882 not any sort of flag. Their SEC_ALLOC bits are cleared. */
889 else if (name[1] == 'g' && name[2] == 'n')
890 p = ".gnu.linkonce.wi.", n = 17;
891 else if (name[1] == 'g' && name[2] == 'd')
892 p = ".gdb_index", n = 11; /* yes we really do mean 11. */
893 else if (name[1] == 'l')
895 else if (name[1] == 's')
897 else if (name[1] == 'z')
898 p = ".zdebug", n = 7;
901 if (p != NULL && strncmp (name, p, n) == 0)
902 flags |= SEC_DEBUGGING;
906 /* As a GNU extension, if the name begins with .gnu.linkonce, we
907 only link a single copy of the section. This is used to support
908 g++. g++ will emit each template expansion in its own section.
909 The symbols will be defined as weak, so that multiple definitions
910 are permitted. The GNU linker extension is to actually discard
911 all but one of the sections. */
912 if (CONST_STRNEQ (name, ".gnu.linkonce")
913 && elf_next_in_group (newsect) == NULL)
914 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
916 bed = get_elf_backend_data (abfd);
917 if (bed->elf_backend_section_flags)
918 if (! bed->elf_backend_section_flags (&flags, hdr))
921 if (! bfd_set_section_flags (abfd, newsect, flags))
924 /* We do not parse the PT_NOTE segments as we are interested even in the
925 separate debug info files which may have the segments offsets corrupted.
926 PT_NOTEs from the core files are currently not parsed using BFD. */
927 if (hdr->sh_type == SHT_NOTE)
931 if (!bfd_malloc_and_get_section (abfd, newsect, &contents))
934 elf_parse_notes (abfd, (char *) contents, hdr->sh_size, -1);
938 if ((flags & SEC_ALLOC) != 0)
940 Elf_Internal_Phdr *phdr;
941 unsigned int i, nload;
943 /* Some ELF linkers produce binaries with all the program header
944 p_paddr fields zero. If we have such a binary with more than
945 one PT_LOAD header, then leave the section lma equal to vma
946 so that we don't create sections with overlapping lma. */
947 phdr = elf_tdata (abfd)->phdr;
948 for (nload = 0, i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
949 if (phdr->p_paddr != 0)
951 else if (phdr->p_type == PT_LOAD && phdr->p_memsz != 0)
953 if (i >= elf_elfheader (abfd)->e_phnum && nload > 1)
956 phdr = elf_tdata (abfd)->phdr;
957 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
959 if (((phdr->p_type == PT_LOAD
960 && (hdr->sh_flags & SHF_TLS) == 0)
961 || phdr->p_type == PT_TLS)
962 && ELF_SECTION_IN_SEGMENT (hdr, phdr))
964 if ((flags & SEC_LOAD) == 0)
965 newsect->lma = (phdr->p_paddr
966 + hdr->sh_addr - phdr->p_vaddr);
968 /* We used to use the same adjustment for SEC_LOAD
969 sections, but that doesn't work if the segment
970 is packed with code from multiple VMAs.
971 Instead we calculate the section LMA based on
972 the segment LMA. It is assumed that the
973 segment will contain sections with contiguous
974 LMAs, even if the VMAs are not. */
975 newsect->lma = (phdr->p_paddr
976 + hdr->sh_offset - phdr->p_offset);
978 /* With contiguous segments, we can't tell from file
979 offsets whether a section with zero size should
980 be placed at the end of one segment or the
981 beginning of the next. Decide based on vaddr. */
982 if (hdr->sh_addr >= phdr->p_vaddr
983 && (hdr->sh_addr + hdr->sh_size
984 <= phdr->p_vaddr + phdr->p_memsz))
990 /* Compress/decompress DWARF debug sections with names: .debug_* and
991 .zdebug_*, after the section flags is set. */
992 if ((flags & SEC_DEBUGGING)
993 && ((name[1] == 'd' && name[6] == '_')
994 || (name[1] == 'z' && name[7] == '_')))
996 enum { nothing, compress, decompress } action = nothing;
999 if (bfd_is_section_compressed (abfd, newsect))
1001 /* Compressed section. Check if we should decompress. */
1002 if ((abfd->flags & BFD_DECOMPRESS))
1003 action = decompress;
1007 /* Normal section. Check if we should compress. */
1008 if ((abfd->flags & BFD_COMPRESS) && newsect->size != 0)
1018 if (!bfd_init_section_compress_status (abfd, newsect))
1020 (*_bfd_error_handler)
1021 (_("%B: unable to initialize compress status for section %s"),
1027 unsigned int len = strlen (name);
1029 new_name = bfd_alloc (abfd, len + 2);
1030 if (new_name == NULL)
1034 memcpy (new_name + 2, name + 1, len);
1038 if (!bfd_init_section_decompress_status (abfd, newsect))
1040 (*_bfd_error_handler)
1041 (_("%B: unable to initialize decompress status for section %s"),
1047 unsigned int len = strlen (name);
1049 new_name = bfd_alloc (abfd, len);
1050 if (new_name == NULL)
1053 memcpy (new_name + 1, name + 2, len - 1);
1057 if (new_name != NULL)
1058 bfd_rename_section (abfd, newsect, new_name);
1064 const char *const bfd_elf_section_type_names[] = {
1065 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
1066 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
1067 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
1070 /* ELF relocs are against symbols. If we are producing relocatable
1071 output, and the reloc is against an external symbol, and nothing
1072 has given us any additional addend, the resulting reloc will also
1073 be against the same symbol. In such a case, we don't want to
1074 change anything about the way the reloc is handled, since it will
1075 all be done at final link time. Rather than put special case code
1076 into bfd_perform_relocation, all the reloc types use this howto
1077 function. It just short circuits the reloc if producing
1078 relocatable output against an external symbol. */
1080 bfd_reloc_status_type
1081 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1082 arelent *reloc_entry,
1084 void *data ATTRIBUTE_UNUSED,
1085 asection *input_section,
1087 char **error_message ATTRIBUTE_UNUSED)
1089 if (output_bfd != NULL
1090 && (symbol->flags & BSF_SECTION_SYM) == 0
1091 && (! reloc_entry->howto->partial_inplace
1092 || reloc_entry->addend == 0))
1094 reloc_entry->address += input_section->output_offset;
1095 return bfd_reloc_ok;
1098 return bfd_reloc_continue;
1101 /* Copy the program header and other data from one object module to
1105 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
1107 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1108 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1111 BFD_ASSERT (!elf_flags_init (obfd)
1112 || (elf_elfheader (obfd)->e_flags
1113 == elf_elfheader (ibfd)->e_flags));
1115 elf_gp (obfd) = elf_gp (ibfd);
1116 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1117 elf_flags_init (obfd) = TRUE;
1119 /* Copy object attributes. */
1120 _bfd_elf_copy_obj_attributes (ibfd, obfd);
1125 get_segment_type (unsigned int p_type)
1130 case PT_NULL: pt = "NULL"; break;
1131 case PT_LOAD: pt = "LOAD"; break;
1132 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1133 case PT_INTERP: pt = "INTERP"; break;
1134 case PT_NOTE: pt = "NOTE"; break;
1135 case PT_SHLIB: pt = "SHLIB"; break;
1136 case PT_PHDR: pt = "PHDR"; break;
1137 case PT_TLS: pt = "TLS"; break;
1138 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1139 case PT_GNU_STACK: pt = "STACK"; break;
1140 case PT_GNU_RELRO: pt = "RELRO"; break;
1141 default: pt = NULL; break;
1146 /* Print out the program headers. */
1149 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1151 FILE *f = (FILE *) farg;
1152 Elf_Internal_Phdr *p;
1154 bfd_byte *dynbuf = NULL;
1156 p = elf_tdata (abfd)->phdr;
1161 fprintf (f, _("\nProgram Header:\n"));
1162 c = elf_elfheader (abfd)->e_phnum;
1163 for (i = 0; i < c; i++, p++)
1165 const char *pt = get_segment_type (p->p_type);
1170 sprintf (buf, "0x%lx", p->p_type);
1173 fprintf (f, "%8s off 0x", pt);
1174 bfd_fprintf_vma (abfd, f, p->p_offset);
1175 fprintf (f, " vaddr 0x");
1176 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1177 fprintf (f, " paddr 0x");
1178 bfd_fprintf_vma (abfd, f, p->p_paddr);
1179 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1180 fprintf (f, " filesz 0x");
1181 bfd_fprintf_vma (abfd, f, p->p_filesz);
1182 fprintf (f, " memsz 0x");
1183 bfd_fprintf_vma (abfd, f, p->p_memsz);
1184 fprintf (f, " flags %c%c%c",
1185 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1186 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1187 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1188 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1189 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1194 s = bfd_get_section_by_name (abfd, ".dynamic");
1197 unsigned int elfsec;
1198 unsigned long shlink;
1199 bfd_byte *extdyn, *extdynend;
1201 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1203 fprintf (f, _("\nDynamic Section:\n"));
1205 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1208 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1209 if (elfsec == SHN_BAD)
1211 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1213 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1214 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1217 extdynend = extdyn + s->size;
1218 for (; extdyn < extdynend; extdyn += extdynsize)
1220 Elf_Internal_Dyn dyn;
1221 const char *name = "";
1223 bfd_boolean stringp;
1224 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1226 (*swap_dyn_in) (abfd, extdyn, &dyn);
1228 if (dyn.d_tag == DT_NULL)
1235 if (bed->elf_backend_get_target_dtag)
1236 name = (*bed->elf_backend_get_target_dtag) (dyn.d_tag);
1238 if (!strcmp (name, ""))
1240 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1245 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1246 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1247 case DT_PLTGOT: name = "PLTGOT"; break;
1248 case DT_HASH: name = "HASH"; break;
1249 case DT_STRTAB: name = "STRTAB"; break;
1250 case DT_SYMTAB: name = "SYMTAB"; break;
1251 case DT_RELA: name = "RELA"; break;
1252 case DT_RELASZ: name = "RELASZ"; break;
1253 case DT_RELAENT: name = "RELAENT"; break;
1254 case DT_STRSZ: name = "STRSZ"; break;
1255 case DT_SYMENT: name = "SYMENT"; break;
1256 case DT_INIT: name = "INIT"; break;
1257 case DT_FINI: name = "FINI"; break;
1258 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1259 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1260 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1261 case DT_REL: name = "REL"; break;
1262 case DT_RELSZ: name = "RELSZ"; break;
1263 case DT_RELENT: name = "RELENT"; break;
1264 case DT_PLTREL: name = "PLTREL"; break;
1265 case DT_DEBUG: name = "DEBUG"; break;
1266 case DT_TEXTREL: name = "TEXTREL"; break;
1267 case DT_JMPREL: name = "JMPREL"; break;
1268 case DT_BIND_NOW: name = "BIND_NOW"; break;
1269 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1270 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1271 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1272 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1273 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1274 case DT_FLAGS: name = "FLAGS"; break;
1275 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1276 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1277 case DT_CHECKSUM: name = "CHECKSUM"; break;
1278 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1279 case DT_MOVEENT: name = "MOVEENT"; break;
1280 case DT_MOVESZ: name = "MOVESZ"; break;
1281 case DT_FEATURE: name = "FEATURE"; break;
1282 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1283 case DT_SYMINSZ: name = "SYMINSZ"; break;
1284 case DT_SYMINENT: name = "SYMINENT"; break;
1285 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1286 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1287 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1288 case DT_PLTPAD: name = "PLTPAD"; break;
1289 case DT_MOVETAB: name = "MOVETAB"; break;
1290 case DT_SYMINFO: name = "SYMINFO"; break;
1291 case DT_RELACOUNT: name = "RELACOUNT"; break;
1292 case DT_RELCOUNT: name = "RELCOUNT"; break;
1293 case DT_FLAGS_1: name = "FLAGS_1"; break;
1294 case DT_VERSYM: name = "VERSYM"; break;
1295 case DT_VERDEF: name = "VERDEF"; break;
1296 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1297 case DT_VERNEED: name = "VERNEED"; break;
1298 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1299 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1300 case DT_USED: name = "USED"; break;
1301 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1302 case DT_GNU_HASH: name = "GNU_HASH"; break;
1305 fprintf (f, " %-20s ", name);
1309 bfd_fprintf_vma (abfd, f, dyn.d_un.d_val);
1314 unsigned int tagv = dyn.d_un.d_val;
1316 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1319 fprintf (f, "%s", string);
1328 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1329 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1331 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1335 if (elf_dynverdef (abfd) != 0)
1337 Elf_Internal_Verdef *t;
1339 fprintf (f, _("\nVersion definitions:\n"));
1340 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1342 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1343 t->vd_flags, t->vd_hash,
1344 t->vd_nodename ? t->vd_nodename : "<corrupt>");
1345 if (t->vd_auxptr != NULL && t->vd_auxptr->vda_nextptr != NULL)
1347 Elf_Internal_Verdaux *a;
1350 for (a = t->vd_auxptr->vda_nextptr;
1354 a->vda_nodename ? a->vda_nodename : "<corrupt>");
1360 if (elf_dynverref (abfd) != 0)
1362 Elf_Internal_Verneed *t;
1364 fprintf (f, _("\nVersion References:\n"));
1365 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1367 Elf_Internal_Vernaux *a;
1369 fprintf (f, _(" required from %s:\n"),
1370 t->vn_filename ? t->vn_filename : "<corrupt>");
1371 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1372 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1373 a->vna_flags, a->vna_other,
1374 a->vna_nodename ? a->vna_nodename : "<corrupt>");
1386 /* Display ELF-specific fields of a symbol. */
1389 bfd_elf_print_symbol (bfd *abfd,
1392 bfd_print_symbol_type how)
1394 FILE *file = (FILE *) filep;
1397 case bfd_print_symbol_name:
1398 fprintf (file, "%s", symbol->name);
1400 case bfd_print_symbol_more:
1401 fprintf (file, "elf ");
1402 bfd_fprintf_vma (abfd, file, symbol->value);
1403 fprintf (file, " %lx", (unsigned long) symbol->flags);
1405 case bfd_print_symbol_all:
1407 const char *section_name;
1408 const char *name = NULL;
1409 const struct elf_backend_data *bed;
1410 unsigned char st_other;
1413 section_name = symbol->section ? symbol->section->name : "(*none*)";
1415 bed = get_elf_backend_data (abfd);
1416 if (bed->elf_backend_print_symbol_all)
1417 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1421 name = symbol->name;
1422 bfd_print_symbol_vandf (abfd, file, symbol);
1425 fprintf (file, " %s\t", section_name);
1426 /* Print the "other" value for a symbol. For common symbols,
1427 we've already printed the size; now print the alignment.
1428 For other symbols, we have no specified alignment, and
1429 we've printed the address; now print the size. */
1430 if (symbol->section && bfd_is_com_section (symbol->section))
1431 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1433 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1434 bfd_fprintf_vma (abfd, file, val);
1436 /* If we have version information, print it. */
1437 if (elf_tdata (abfd)->dynversym_section != 0
1438 && (elf_tdata (abfd)->dynverdef_section != 0
1439 || elf_tdata (abfd)->dynverref_section != 0))
1441 unsigned int vernum;
1442 const char *version_string;
1444 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1447 version_string = "";
1448 else if (vernum == 1)
1449 version_string = "Base";
1450 else if (vernum <= elf_tdata (abfd)->cverdefs)
1452 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1455 Elf_Internal_Verneed *t;
1457 version_string = "";
1458 for (t = elf_tdata (abfd)->verref;
1462 Elf_Internal_Vernaux *a;
1464 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1466 if (a->vna_other == vernum)
1468 version_string = a->vna_nodename;
1475 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1476 fprintf (file, " %-11s", version_string);
1481 fprintf (file, " (%s)", version_string);
1482 for (i = 10 - strlen (version_string); i > 0; --i)
1487 /* If the st_other field is not zero, print it. */
1488 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1493 case STV_INTERNAL: fprintf (file, " .internal"); break;
1494 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1495 case STV_PROTECTED: fprintf (file, " .protected"); break;
1497 /* Some other non-defined flags are also present, so print
1499 fprintf (file, " 0x%02x", (unsigned int) st_other);
1502 fprintf (file, " %s", name);
1508 /* Allocate an ELF string table--force the first byte to be zero. */
1510 struct bfd_strtab_hash *
1511 _bfd_elf_stringtab_init (void)
1513 struct bfd_strtab_hash *ret;
1515 ret = _bfd_stringtab_init ();
1520 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1521 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1522 if (loc == (bfd_size_type) -1)
1524 _bfd_stringtab_free (ret);
1531 /* ELF .o/exec file reading */
1533 /* Create a new bfd section from an ELF section header. */
1536 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1538 Elf_Internal_Shdr *hdr;
1539 Elf_Internal_Ehdr *ehdr;
1540 const struct elf_backend_data *bed;
1543 if (shindex >= elf_numsections (abfd))
1546 hdr = elf_elfsections (abfd)[shindex];
1547 ehdr = elf_elfheader (abfd);
1548 name = bfd_elf_string_from_elf_section (abfd, ehdr->e_shstrndx,
1553 bed = get_elf_backend_data (abfd);
1554 switch (hdr->sh_type)
1557 /* Inactive section. Throw it away. */
1560 case SHT_PROGBITS: /* Normal section with contents. */
1561 case SHT_NOBITS: /* .bss section. */
1562 case SHT_HASH: /* .hash section. */
1563 case SHT_NOTE: /* .note section. */
1564 case SHT_INIT_ARRAY: /* .init_array section. */
1565 case SHT_FINI_ARRAY: /* .fini_array section. */
1566 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1567 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
1568 case SHT_GNU_HASH: /* .gnu.hash section. */
1569 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1571 case SHT_DYNAMIC: /* Dynamic linking information. */
1572 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1574 if (hdr->sh_link > elf_numsections (abfd))
1576 /* PR 10478: Accept Solaris binaries with a sh_link
1577 field set to SHN_BEFORE or SHN_AFTER. */
1578 switch (bfd_get_arch (abfd))
1581 case bfd_arch_sparc:
1582 if (hdr->sh_link == (SHN_LORESERVE & 0xffff) /* SHN_BEFORE */
1583 || hdr->sh_link == ((SHN_LORESERVE + 1) & 0xffff) /* SHN_AFTER */)
1585 /* Otherwise fall through. */
1590 else if (elf_elfsections (abfd)[hdr->sh_link] == NULL)
1592 else if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1594 Elf_Internal_Shdr *dynsymhdr;
1596 /* The shared libraries distributed with hpux11 have a bogus
1597 sh_link field for the ".dynamic" section. Find the
1598 string table for the ".dynsym" section instead. */
1599 if (elf_dynsymtab (abfd) != 0)
1601 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1602 hdr->sh_link = dynsymhdr->sh_link;
1606 unsigned int i, num_sec;
1608 num_sec = elf_numsections (abfd);
1609 for (i = 1; i < num_sec; i++)
1611 dynsymhdr = elf_elfsections (abfd)[i];
1612 if (dynsymhdr->sh_type == SHT_DYNSYM)
1614 hdr->sh_link = dynsymhdr->sh_link;
1622 case SHT_SYMTAB: /* A symbol table */
1623 if (elf_onesymtab (abfd) == shindex)
1626 if (hdr->sh_entsize != bed->s->sizeof_sym)
1628 if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size)
1630 if (hdr->sh_size != 0)
1632 /* Some assemblers erroneously set sh_info to one with a
1633 zero sh_size. ld sees this as a global symbol count
1634 of (unsigned) -1. Fix it here. */
1638 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1639 elf_onesymtab (abfd) = shindex;
1640 elf_tdata (abfd)->symtab_hdr = *hdr;
1641 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1642 abfd->flags |= HAS_SYMS;
1644 /* Sometimes a shared object will map in the symbol table. If
1645 SHF_ALLOC is set, and this is a shared object, then we also
1646 treat this section as a BFD section. We can not base the
1647 decision purely on SHF_ALLOC, because that flag is sometimes
1648 set in a relocatable object file, which would confuse the
1650 if ((hdr->sh_flags & SHF_ALLOC) != 0
1651 && (abfd->flags & DYNAMIC) != 0
1652 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1656 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1657 can't read symbols without that section loaded as well. It
1658 is most likely specified by the next section header. */
1659 if (elf_elfsections (abfd)[elf_symtab_shndx (abfd)]->sh_link != shindex)
1661 unsigned int i, num_sec;
1663 num_sec = elf_numsections (abfd);
1664 for (i = shindex + 1; i < num_sec; i++)
1666 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1667 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1668 && hdr2->sh_link == shindex)
1672 for (i = 1; i < shindex; i++)
1674 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1675 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1676 && hdr2->sh_link == shindex)
1680 return bfd_section_from_shdr (abfd, i);
1684 case SHT_DYNSYM: /* A dynamic symbol table */
1685 if (elf_dynsymtab (abfd) == shindex)
1688 if (hdr->sh_entsize != bed->s->sizeof_sym)
1690 if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size)
1692 if (hdr->sh_size != 0)
1694 /* Some linkers erroneously set sh_info to one with a
1695 zero sh_size. ld sees this as a global symbol count
1696 of (unsigned) -1. Fix it here. */
1700 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1701 elf_dynsymtab (abfd) = shindex;
1702 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1703 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1704 abfd->flags |= HAS_SYMS;
1706 /* Besides being a symbol table, we also treat this as a regular
1707 section, so that objcopy can handle it. */
1708 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1710 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1711 if (elf_symtab_shndx (abfd) == shindex)
1714 BFD_ASSERT (elf_symtab_shndx (abfd) == 0);
1715 elf_symtab_shndx (abfd) = shindex;
1716 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1717 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1720 case SHT_STRTAB: /* A string table */
1721 if (hdr->bfd_section != NULL)
1723 if (ehdr->e_shstrndx == shindex)
1725 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1726 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1729 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
1732 elf_tdata (abfd)->strtab_hdr = *hdr;
1733 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
1736 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
1739 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1740 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
1741 elf_elfsections (abfd)[shindex] = hdr;
1742 /* We also treat this as a regular section, so that objcopy
1744 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1748 /* If the string table isn't one of the above, then treat it as a
1749 regular section. We need to scan all the headers to be sure,
1750 just in case this strtab section appeared before the above. */
1751 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
1753 unsigned int i, num_sec;
1755 num_sec = elf_numsections (abfd);
1756 for (i = 1; i < num_sec; i++)
1758 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1759 if (hdr2->sh_link == shindex)
1761 /* Prevent endless recursion on broken objects. */
1764 if (! bfd_section_from_shdr (abfd, i))
1766 if (elf_onesymtab (abfd) == i)
1768 if (elf_dynsymtab (abfd) == i)
1769 goto dynsymtab_strtab;
1773 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1777 /* *These* do a lot of work -- but build no sections! */
1779 asection *target_sect;
1780 Elf_Internal_Shdr *hdr2, **p_hdr;
1781 unsigned int num_sec = elf_numsections (abfd);
1782 struct bfd_elf_section_data *esdt;
1786 != (bfd_size_type) (hdr->sh_type == SHT_REL
1787 ? bed->s->sizeof_rel : bed->s->sizeof_rela))
1790 /* Check for a bogus link to avoid crashing. */
1791 if (hdr->sh_link >= num_sec)
1793 ((*_bfd_error_handler)
1794 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1795 abfd, hdr->sh_link, name, shindex));
1796 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1800 /* For some incomprehensible reason Oracle distributes
1801 libraries for Solaris in which some of the objects have
1802 bogus sh_link fields. It would be nice if we could just
1803 reject them, but, unfortunately, some people need to use
1804 them. We scan through the section headers; if we find only
1805 one suitable symbol table, we clobber the sh_link to point
1806 to it. I hope this doesn't break anything.
1808 Don't do it on executable nor shared library. */
1809 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0
1810 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1811 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1817 for (scan = 1; scan < num_sec; scan++)
1819 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1820 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1831 hdr->sh_link = found;
1834 /* Get the symbol table. */
1835 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1836 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
1837 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1840 /* If this reloc section does not use the main symbol table we
1841 don't treat it as a reloc section. BFD can't adequately
1842 represent such a section, so at least for now, we don't
1843 try. We just present it as a normal section. We also
1844 can't use it as a reloc section if it points to the null
1845 section, an invalid section, another reloc section, or its
1846 sh_link points to the null section. */
1847 if (hdr->sh_link != elf_onesymtab (abfd)
1848 || hdr->sh_link == SHN_UNDEF
1849 || hdr->sh_info == SHN_UNDEF
1850 || hdr->sh_info >= num_sec
1851 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL
1852 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_RELA)
1853 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1856 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1858 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1859 if (target_sect == NULL)
1862 esdt = elf_section_data (target_sect);
1863 if (hdr->sh_type == SHT_RELA)
1864 p_hdr = &esdt->rela.hdr;
1866 p_hdr = &esdt->rel.hdr;
1868 BFD_ASSERT (*p_hdr == NULL);
1869 amt = sizeof (*hdr2);
1870 hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt);
1875 elf_elfsections (abfd)[shindex] = hdr2;
1876 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
1877 target_sect->flags |= SEC_RELOC;
1878 target_sect->relocation = NULL;
1879 target_sect->rel_filepos = hdr->sh_offset;
1880 /* In the section to which the relocations apply, mark whether
1881 its relocations are of the REL or RELA variety. */
1882 if (hdr->sh_size != 0)
1884 if (hdr->sh_type == SHT_RELA)
1885 target_sect->use_rela_p = 1;
1887 abfd->flags |= HAS_RELOC;
1891 case SHT_GNU_verdef:
1892 elf_dynverdef (abfd) = shindex;
1893 elf_tdata (abfd)->dynverdef_hdr = *hdr;
1894 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1896 case SHT_GNU_versym:
1897 if (hdr->sh_entsize != sizeof (Elf_External_Versym))
1899 elf_dynversym (abfd) = shindex;
1900 elf_tdata (abfd)->dynversym_hdr = *hdr;
1901 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1903 case SHT_GNU_verneed:
1904 elf_dynverref (abfd) = shindex;
1905 elf_tdata (abfd)->dynverref_hdr = *hdr;
1906 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1912 if (! IS_VALID_GROUP_SECTION_HEADER (hdr, GRP_ENTRY_SIZE))
1914 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1916 if (hdr->contents != NULL)
1918 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
1919 unsigned int n_elt = hdr->sh_size / GRP_ENTRY_SIZE;
1922 if (idx->flags & GRP_COMDAT)
1923 hdr->bfd_section->flags
1924 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
1926 /* We try to keep the same section order as it comes in. */
1928 while (--n_elt != 0)
1932 if (idx->shdr != NULL
1933 && (s = idx->shdr->bfd_section) != NULL
1934 && elf_next_in_group (s) != NULL)
1936 elf_next_in_group (hdr->bfd_section) = s;
1944 /* Possibly an attributes section. */
1945 if (hdr->sh_type == SHT_GNU_ATTRIBUTES
1946 || hdr->sh_type == bed->obj_attrs_section_type)
1948 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1950 _bfd_elf_parse_attributes (abfd, hdr);
1954 /* Check for any processor-specific section types. */
1955 if (bed->elf_backend_section_from_shdr (abfd, hdr, name, shindex))
1958 if (hdr->sh_type >= SHT_LOUSER && hdr->sh_type <= SHT_HIUSER)
1960 if ((hdr->sh_flags & SHF_ALLOC) != 0)
1961 /* FIXME: How to properly handle allocated section reserved
1962 for applications? */
1963 (*_bfd_error_handler)
1964 (_("%B: don't know how to handle allocated, application "
1965 "specific section `%s' [0x%8x]"),
1966 abfd, name, hdr->sh_type);
1968 /* Allow sections reserved for applications. */
1969 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1972 else if (hdr->sh_type >= SHT_LOPROC
1973 && hdr->sh_type <= SHT_HIPROC)
1974 /* FIXME: We should handle this section. */
1975 (*_bfd_error_handler)
1976 (_("%B: don't know how to handle processor specific section "
1978 abfd, name, hdr->sh_type);
1979 else if (hdr->sh_type >= SHT_LOOS && hdr->sh_type <= SHT_HIOS)
1981 /* Unrecognised OS-specific sections. */
1982 if ((hdr->sh_flags & SHF_OS_NONCONFORMING) != 0)
1983 /* SHF_OS_NONCONFORMING indicates that special knowledge is
1984 required to correctly process the section and the file should
1985 be rejected with an error message. */
1986 (*_bfd_error_handler)
1987 (_("%B: don't know how to handle OS specific section "
1989 abfd, name, hdr->sh_type);
1991 /* Otherwise it should be processed. */
1992 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1995 /* FIXME: We should handle this section. */
1996 (*_bfd_error_handler)
1997 (_("%B: don't know how to handle section `%s' [0x%8x]"),
1998 abfd, name, hdr->sh_type);
2006 /* Return the local symbol specified by ABFD, R_SYMNDX. */
2009 bfd_sym_from_r_symndx (struct sym_cache *cache,
2011 unsigned long r_symndx)
2013 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
2015 if (cache->abfd != abfd || cache->indx[ent] != r_symndx)
2017 Elf_Internal_Shdr *symtab_hdr;
2018 unsigned char esym[sizeof (Elf64_External_Sym)];
2019 Elf_External_Sym_Shndx eshndx;
2021 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2022 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
2023 &cache->sym[ent], esym, &eshndx) == NULL)
2026 if (cache->abfd != abfd)
2028 memset (cache->indx, -1, sizeof (cache->indx));
2031 cache->indx[ent] = r_symndx;
2034 return &cache->sym[ent];
2037 /* Given an ELF section number, retrieve the corresponding BFD
2041 bfd_section_from_elf_index (bfd *abfd, unsigned int sec_index)
2043 if (sec_index >= elf_numsections (abfd))
2045 return elf_elfsections (abfd)[sec_index]->bfd_section;
2048 static const struct bfd_elf_special_section special_sections_b[] =
2050 { STRING_COMMA_LEN (".bss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2051 { NULL, 0, 0, 0, 0 }
2054 static const struct bfd_elf_special_section special_sections_c[] =
2056 { STRING_COMMA_LEN (".comment"), 0, SHT_PROGBITS, 0 },
2057 { NULL, 0, 0, 0, 0 }
2060 static const struct bfd_elf_special_section special_sections_d[] =
2062 { STRING_COMMA_LEN (".data"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2063 { STRING_COMMA_LEN (".data1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2064 /* There are more DWARF sections than these, but they needn't be added here
2065 unless you have to cope with broken compilers that don't emit section
2066 attributes or you want to help the user writing assembler. */
2067 { STRING_COMMA_LEN (".debug"), 0, SHT_PROGBITS, 0 },
2068 { STRING_COMMA_LEN (".debug_line"), 0, SHT_PROGBITS, 0 },
2069 { STRING_COMMA_LEN (".debug_info"), 0, SHT_PROGBITS, 0 },
2070 { STRING_COMMA_LEN (".debug_abbrev"), 0, SHT_PROGBITS, 0 },
2071 { STRING_COMMA_LEN (".debug_aranges"), 0, SHT_PROGBITS, 0 },
2072 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, SHF_ALLOC },
2073 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, SHF_ALLOC },
2074 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, SHF_ALLOC },
2075 { NULL, 0, 0, 0, 0 }
2078 static const struct bfd_elf_special_section special_sections_f[] =
2080 { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2081 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2082 { NULL, 0, 0, 0, 0 }
2085 static const struct bfd_elf_special_section special_sections_g[] =
2087 { STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2088 { STRING_COMMA_LEN (".gnu.lto_"), -1, SHT_PROGBITS, SHF_EXCLUDE },
2089 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2090 { STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym, 0 },
2091 { STRING_COMMA_LEN (".gnu.version_d"), 0, SHT_GNU_verdef, 0 },
2092 { STRING_COMMA_LEN (".gnu.version_r"), 0, SHT_GNU_verneed, 0 },
2093 { STRING_COMMA_LEN (".gnu.liblist"), 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2094 { STRING_COMMA_LEN (".gnu.conflict"), 0, SHT_RELA, SHF_ALLOC },
2095 { STRING_COMMA_LEN (".gnu.hash"), 0, SHT_GNU_HASH, SHF_ALLOC },
2096 { NULL, 0, 0, 0, 0 }
2099 static const struct bfd_elf_special_section special_sections_h[] =
2101 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, SHF_ALLOC },
2102 { NULL, 0, 0, 0, 0 }
2105 static const struct bfd_elf_special_section special_sections_i[] =
2107 { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2108 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2109 { STRING_COMMA_LEN (".interp"), 0, SHT_PROGBITS, 0 },
2110 { NULL, 0, 0, 0, 0 }
2113 static const struct bfd_elf_special_section special_sections_l[] =
2115 { STRING_COMMA_LEN (".line"), 0, SHT_PROGBITS, 0 },
2116 { NULL, 0, 0, 0, 0 }
2119 static const struct bfd_elf_special_section special_sections_n[] =
2121 { STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS, 0 },
2122 { STRING_COMMA_LEN (".note"), -1, SHT_NOTE, 0 },
2123 { NULL, 0, 0, 0, 0 }
2126 static const struct bfd_elf_special_section special_sections_p[] =
2128 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2129 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2130 { NULL, 0, 0, 0, 0 }
2133 static const struct bfd_elf_special_section special_sections_r[] =
2135 { STRING_COMMA_LEN (".rodata"), -2, SHT_PROGBITS, SHF_ALLOC },
2136 { STRING_COMMA_LEN (".rodata1"), 0, SHT_PROGBITS, SHF_ALLOC },
2137 { STRING_COMMA_LEN (".rela"), -1, SHT_RELA, 0 },
2138 { STRING_COMMA_LEN (".rel"), -1, SHT_REL, 0 },
2139 { NULL, 0, 0, 0, 0 }
2142 static const struct bfd_elf_special_section special_sections_s[] =
2144 { STRING_COMMA_LEN (".shstrtab"), 0, SHT_STRTAB, 0 },
2145 { STRING_COMMA_LEN (".strtab"), 0, SHT_STRTAB, 0 },
2146 { STRING_COMMA_LEN (".symtab"), 0, SHT_SYMTAB, 0 },
2147 /* See struct bfd_elf_special_section declaration for the semantics of
2148 this special case where .prefix_length != strlen (.prefix). */
2149 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2150 { NULL, 0, 0, 0, 0 }
2153 static const struct bfd_elf_special_section special_sections_t[] =
2155 { STRING_COMMA_LEN (".text"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2156 { STRING_COMMA_LEN (".tbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2157 { STRING_COMMA_LEN (".tdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2158 { NULL, 0, 0, 0, 0 }
2161 static const struct bfd_elf_special_section special_sections_z[] =
2163 { STRING_COMMA_LEN (".zdebug_line"), 0, SHT_PROGBITS, 0 },
2164 { STRING_COMMA_LEN (".zdebug_info"), 0, SHT_PROGBITS, 0 },
2165 { STRING_COMMA_LEN (".zdebug_abbrev"), 0, SHT_PROGBITS, 0 },
2166 { STRING_COMMA_LEN (".zdebug_aranges"), 0, SHT_PROGBITS, 0 },
2167 { NULL, 0, 0, 0, 0 }
2170 static const struct bfd_elf_special_section * const special_sections[] =
2172 special_sections_b, /* 'b' */
2173 special_sections_c, /* 'c' */
2174 special_sections_d, /* 'd' */
2176 special_sections_f, /* 'f' */
2177 special_sections_g, /* 'g' */
2178 special_sections_h, /* 'h' */
2179 special_sections_i, /* 'i' */
2182 special_sections_l, /* 'l' */
2184 special_sections_n, /* 'n' */
2186 special_sections_p, /* 'p' */
2188 special_sections_r, /* 'r' */
2189 special_sections_s, /* 's' */
2190 special_sections_t, /* 't' */
2196 special_sections_z /* 'z' */
2199 const struct bfd_elf_special_section *
2200 _bfd_elf_get_special_section (const char *name,
2201 const struct bfd_elf_special_section *spec,
2207 len = strlen (name);
2209 for (i = 0; spec[i].prefix != NULL; i++)
2212 int prefix_len = spec[i].prefix_length;
2214 if (len < prefix_len)
2216 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2219 suffix_len = spec[i].suffix_length;
2220 if (suffix_len <= 0)
2222 if (name[prefix_len] != 0)
2224 if (suffix_len == 0)
2226 if (name[prefix_len] != '.'
2227 && (suffix_len == -2
2228 || (rela && spec[i].type == SHT_REL)))
2234 if (len < prefix_len + suffix_len)
2236 if (memcmp (name + len - suffix_len,
2237 spec[i].prefix + prefix_len,
2247 const struct bfd_elf_special_section *
2248 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2251 const struct bfd_elf_special_section *spec;
2252 const struct elf_backend_data *bed;
2254 /* See if this is one of the special sections. */
2255 if (sec->name == NULL)
2258 bed = get_elf_backend_data (abfd);
2259 spec = bed->special_sections;
2262 spec = _bfd_elf_get_special_section (sec->name,
2263 bed->special_sections,
2269 if (sec->name[0] != '.')
2272 i = sec->name[1] - 'b';
2273 if (i < 0 || i > 'z' - 'b')
2276 spec = special_sections[i];
2281 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2285 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2287 struct bfd_elf_section_data *sdata;
2288 const struct elf_backend_data *bed;
2289 const struct bfd_elf_special_section *ssect;
2291 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2294 sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd,
2298 sec->used_by_bfd = sdata;
2301 /* Indicate whether or not this section should use RELA relocations. */
2302 bed = get_elf_backend_data (abfd);
2303 sec->use_rela_p = bed->default_use_rela_p;
2305 /* When we read a file, we don't need to set ELF section type and
2306 flags. They will be overridden in _bfd_elf_make_section_from_shdr
2307 anyway. We will set ELF section type and flags for all linker
2308 created sections. If user specifies BFD section flags, we will
2309 set ELF section type and flags based on BFD section flags in
2310 elf_fake_sections. Special handling for .init_array/.fini_array
2311 output sections since they may contain .ctors/.dtors input
2312 sections. We don't want _bfd_elf_init_private_section_data to
2313 copy ELF section type from .ctors/.dtors input sections. */
2314 if (abfd->direction != read_direction
2315 || (sec->flags & SEC_LINKER_CREATED) != 0)
2317 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2320 || (sec->flags & SEC_LINKER_CREATED) != 0
2321 || ssect->type == SHT_INIT_ARRAY
2322 || ssect->type == SHT_FINI_ARRAY))
2324 elf_section_type (sec) = ssect->type;
2325 elf_section_flags (sec) = ssect->attr;
2329 return _bfd_generic_new_section_hook (abfd, sec);
2332 /* Create a new bfd section from an ELF program header.
2334 Since program segments have no names, we generate a synthetic name
2335 of the form segment<NUM>, where NUM is generally the index in the
2336 program header table. For segments that are split (see below) we
2337 generate the names segment<NUM>a and segment<NUM>b.
2339 Note that some program segments may have a file size that is different than
2340 (less than) the memory size. All this means is that at execution the
2341 system must allocate the amount of memory specified by the memory size,
2342 but only initialize it with the first "file size" bytes read from the
2343 file. This would occur for example, with program segments consisting
2344 of combined data+bss.
2346 To handle the above situation, this routine generates TWO bfd sections
2347 for the single program segment. The first has the length specified by
2348 the file size of the segment, and the second has the length specified
2349 by the difference between the two sizes. In effect, the segment is split
2350 into its initialized and uninitialized parts.
2355 _bfd_elf_make_section_from_phdr (bfd *abfd,
2356 Elf_Internal_Phdr *hdr,
2358 const char *type_name)
2366 split = ((hdr->p_memsz > 0)
2367 && (hdr->p_filesz > 0)
2368 && (hdr->p_memsz > hdr->p_filesz));
2370 if (hdr->p_filesz > 0)
2372 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "a" : "");
2373 len = strlen (namebuf) + 1;
2374 name = (char *) bfd_alloc (abfd, len);
2377 memcpy (name, namebuf, len);
2378 newsect = bfd_make_section (abfd, name);
2379 if (newsect == NULL)
2381 newsect->vma = hdr->p_vaddr;
2382 newsect->lma = hdr->p_paddr;
2383 newsect->size = hdr->p_filesz;
2384 newsect->filepos = hdr->p_offset;
2385 newsect->flags |= SEC_HAS_CONTENTS;
2386 newsect->alignment_power = bfd_log2 (hdr->p_align);
2387 if (hdr->p_type == PT_LOAD)
2389 newsect->flags |= SEC_ALLOC;
2390 newsect->flags |= SEC_LOAD;
2391 if (hdr->p_flags & PF_X)
2393 /* FIXME: all we known is that it has execute PERMISSION,
2395 newsect->flags |= SEC_CODE;
2398 if (!(hdr->p_flags & PF_W))
2400 newsect->flags |= SEC_READONLY;
2404 if (hdr->p_memsz > hdr->p_filesz)
2408 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "b" : "");
2409 len = strlen (namebuf) + 1;
2410 name = (char *) bfd_alloc (abfd, len);
2413 memcpy (name, namebuf, len);
2414 newsect = bfd_make_section (abfd, name);
2415 if (newsect == NULL)
2417 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2418 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2419 newsect->size = hdr->p_memsz - hdr->p_filesz;
2420 newsect->filepos = hdr->p_offset + hdr->p_filesz;
2421 align = newsect->vma & -newsect->vma;
2422 if (align == 0 || align > hdr->p_align)
2423 align = hdr->p_align;
2424 newsect->alignment_power = bfd_log2 (align);
2425 if (hdr->p_type == PT_LOAD)
2427 /* Hack for gdb. Segments that have not been modified do
2428 not have their contents written to a core file, on the
2429 assumption that a debugger can find the contents in the
2430 executable. We flag this case by setting the fake
2431 section size to zero. Note that "real" bss sections will
2432 always have their contents dumped to the core file. */
2433 if (bfd_get_format (abfd) == bfd_core)
2435 newsect->flags |= SEC_ALLOC;
2436 if (hdr->p_flags & PF_X)
2437 newsect->flags |= SEC_CODE;
2439 if (!(hdr->p_flags & PF_W))
2440 newsect->flags |= SEC_READONLY;
2447 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int hdr_index)
2449 const struct elf_backend_data *bed;
2451 switch (hdr->p_type)
2454 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "null");
2457 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "load");
2460 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "dynamic");
2463 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "interp");
2466 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "note"))
2468 if (! elf_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2473 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "shlib");
2476 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "phdr");
2478 case PT_GNU_EH_FRAME:
2479 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index,
2483 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "stack");
2486 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "relro");
2489 /* Check for any processor-specific program segment types. */
2490 bed = get_elf_backend_data (abfd);
2491 return bed->elf_backend_section_from_phdr (abfd, hdr, hdr_index, "proc");
2495 /* Return the REL_HDR for SEC, assuming there is only a single one, either
2499 _bfd_elf_single_rel_hdr (asection *sec)
2501 if (elf_section_data (sec)->rel.hdr)
2503 BFD_ASSERT (elf_section_data (sec)->rela.hdr == NULL);
2504 return elf_section_data (sec)->rel.hdr;
2507 return elf_section_data (sec)->rela.hdr;
2510 /* Allocate and initialize a section-header for a new reloc section,
2511 containing relocations against ASECT. It is stored in RELDATA. If
2512 USE_RELA_P is TRUE, we use RELA relocations; otherwise, we use REL
2516 _bfd_elf_init_reloc_shdr (bfd *abfd,
2517 struct bfd_elf_section_reloc_data *reldata,
2519 bfd_boolean use_rela_p)
2521 Elf_Internal_Shdr *rel_hdr;
2523 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2526 amt = sizeof (Elf_Internal_Shdr);
2527 BFD_ASSERT (reldata->hdr == NULL);
2528 rel_hdr = bfd_zalloc (abfd, amt);
2529 reldata->hdr = rel_hdr;
2531 amt = sizeof ".rela" + strlen (asect->name);
2532 name = (char *) bfd_alloc (abfd, amt);
2535 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2537 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2539 if (rel_hdr->sh_name == (unsigned int) -1)
2541 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2542 rel_hdr->sh_entsize = (use_rela_p
2543 ? bed->s->sizeof_rela
2544 : bed->s->sizeof_rel);
2545 rel_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
2546 rel_hdr->sh_flags = 0;
2547 rel_hdr->sh_addr = 0;
2548 rel_hdr->sh_size = 0;
2549 rel_hdr->sh_offset = 0;
2554 /* Return the default section type based on the passed in section flags. */
2557 bfd_elf_get_default_section_type (flagword flags)
2559 if ((flags & SEC_ALLOC) != 0
2560 && (flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2562 return SHT_PROGBITS;
2565 struct fake_section_arg
2567 struct bfd_link_info *link_info;
2571 /* Set up an ELF internal section header for a section. */
2574 elf_fake_sections (bfd *abfd, asection *asect, void *fsarg)
2576 struct fake_section_arg *arg = (struct fake_section_arg *)fsarg;
2577 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2578 struct bfd_elf_section_data *esd = elf_section_data (asect);
2579 Elf_Internal_Shdr *this_hdr;
2580 unsigned int sh_type;
2584 /* We already failed; just get out of the bfd_map_over_sections
2589 this_hdr = &esd->this_hdr;
2591 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2592 asect->name, FALSE);
2593 if (this_hdr->sh_name == (unsigned int) -1)
2599 /* Don't clear sh_flags. Assembler may set additional bits. */
2601 if ((asect->flags & SEC_ALLOC) != 0
2602 || asect->user_set_vma)
2603 this_hdr->sh_addr = asect->vma;
2605 this_hdr->sh_addr = 0;
2607 this_hdr->sh_offset = 0;
2608 this_hdr->sh_size = asect->size;
2609 this_hdr->sh_link = 0;
2610 this_hdr->sh_addralign = (bfd_vma) 1 << asect->alignment_power;
2611 /* The sh_entsize and sh_info fields may have been set already by
2612 copy_private_section_data. */
2614 this_hdr->bfd_section = asect;
2615 this_hdr->contents = NULL;
2617 /* If the section type is unspecified, we set it based on
2619 if ((asect->flags & SEC_GROUP) != 0)
2620 sh_type = SHT_GROUP;
2622 sh_type = bfd_elf_get_default_section_type (asect->flags);
2624 if (this_hdr->sh_type == SHT_NULL)
2625 this_hdr->sh_type = sh_type;
2626 else if (this_hdr->sh_type == SHT_NOBITS
2627 && sh_type == SHT_PROGBITS
2628 && (asect->flags & SEC_ALLOC) != 0)
2630 /* Warn if we are changing a NOBITS section to PROGBITS, but
2631 allow the link to proceed. This can happen when users link
2632 non-bss input sections to bss output sections, or emit data
2633 to a bss output section via a linker script. */
2634 (*_bfd_error_handler)
2635 (_("warning: section `%A' type changed to PROGBITS"), asect);
2636 this_hdr->sh_type = sh_type;
2639 switch (this_hdr->sh_type)
2645 case SHT_INIT_ARRAY:
2646 case SHT_FINI_ARRAY:
2647 case SHT_PREINIT_ARRAY:
2654 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2658 this_hdr->sh_entsize = bed->s->sizeof_sym;
2662 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2666 if (get_elf_backend_data (abfd)->may_use_rela_p)
2667 this_hdr->sh_entsize = bed->s->sizeof_rela;
2671 if (get_elf_backend_data (abfd)->may_use_rel_p)
2672 this_hdr->sh_entsize = bed->s->sizeof_rel;
2675 case SHT_GNU_versym:
2676 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2679 case SHT_GNU_verdef:
2680 this_hdr->sh_entsize = 0;
2681 /* objcopy or strip will copy over sh_info, but may not set
2682 cverdefs. The linker will set cverdefs, but sh_info will be
2684 if (this_hdr->sh_info == 0)
2685 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2687 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2688 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2691 case SHT_GNU_verneed:
2692 this_hdr->sh_entsize = 0;
2693 /* objcopy or strip will copy over sh_info, but may not set
2694 cverrefs. The linker will set cverrefs, but sh_info will be
2696 if (this_hdr->sh_info == 0)
2697 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2699 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2700 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2704 this_hdr->sh_entsize = GRP_ENTRY_SIZE;
2708 this_hdr->sh_entsize = bed->s->arch_size == 64 ? 0 : 4;
2712 if ((asect->flags & SEC_ALLOC) != 0)
2713 this_hdr->sh_flags |= SHF_ALLOC;
2714 if ((asect->flags & SEC_READONLY) == 0)
2715 this_hdr->sh_flags |= SHF_WRITE;
2716 if ((asect->flags & SEC_CODE) != 0)
2717 this_hdr->sh_flags |= SHF_EXECINSTR;
2718 if ((asect->flags & SEC_MERGE) != 0)
2720 this_hdr->sh_flags |= SHF_MERGE;
2721 this_hdr->sh_entsize = asect->entsize;
2722 if ((asect->flags & SEC_STRINGS) != 0)
2723 this_hdr->sh_flags |= SHF_STRINGS;
2725 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2726 this_hdr->sh_flags |= SHF_GROUP;
2727 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2729 this_hdr->sh_flags |= SHF_TLS;
2730 if (asect->size == 0
2731 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2733 struct bfd_link_order *o = asect->map_tail.link_order;
2735 this_hdr->sh_size = 0;
2738 this_hdr->sh_size = o->offset + o->size;
2739 if (this_hdr->sh_size != 0)
2740 this_hdr->sh_type = SHT_NOBITS;
2744 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
2745 this_hdr->sh_flags |= SHF_EXCLUDE;
2747 /* If the section has relocs, set up a section header for the
2748 SHT_REL[A] section. If two relocation sections are required for
2749 this section, it is up to the processor-specific back-end to
2750 create the other. */
2751 if ((asect->flags & SEC_RELOC) != 0)
2753 /* When doing a relocatable link, create both REL and RELA sections if
2756 /* Do the normal setup if we wouldn't create any sections here. */
2757 && esd->rel.count + esd->rela.count > 0
2758 && (arg->link_info->relocatable || arg->link_info->emitrelocations))
2760 if (esd->rel.count && esd->rel.hdr == NULL
2761 && !_bfd_elf_init_reloc_shdr (abfd, &esd->rel, asect, FALSE))
2766 if (esd->rela.count && esd->rela.hdr == NULL
2767 && !_bfd_elf_init_reloc_shdr (abfd, &esd->rela, asect, TRUE))
2773 else if (!_bfd_elf_init_reloc_shdr (abfd,
2775 ? &esd->rela : &esd->rel),
2781 /* Check for processor-specific section types. */
2782 sh_type = this_hdr->sh_type;
2783 if (bed->elf_backend_fake_sections
2784 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2787 if (sh_type == SHT_NOBITS && asect->size != 0)
2789 /* Don't change the header type from NOBITS if we are being
2790 called for objcopy --only-keep-debug. */
2791 this_hdr->sh_type = sh_type;
2795 /* Fill in the contents of a SHT_GROUP section. Called from
2796 _bfd_elf_compute_section_file_positions for gas, objcopy, and
2797 when ELF targets use the generic linker, ld. Called for ld -r
2798 from bfd_elf_final_link. */
2801 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2803 bfd_boolean *failedptr = (bfd_boolean *) failedptrarg;
2804 asection *elt, *first;
2808 /* Ignore linker created group section. See elfNN_ia64_object_p in
2810 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2814 if (elf_section_data (sec)->this_hdr.sh_info == 0)
2816 unsigned long symindx = 0;
2818 /* elf_group_id will have been set up by objcopy and the
2820 if (elf_group_id (sec) != NULL)
2821 symindx = elf_group_id (sec)->udata.i;
2825 /* If called from the assembler, swap_out_syms will have set up
2826 elf_section_syms. */
2827 BFD_ASSERT (elf_section_syms (abfd) != NULL);
2828 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2830 elf_section_data (sec)->this_hdr.sh_info = symindx;
2832 else if (elf_section_data (sec)->this_hdr.sh_info == (unsigned int) -2)
2834 /* The ELF backend linker sets sh_info to -2 when the group
2835 signature symbol is global, and thus the index can't be
2836 set until all local symbols are output. */
2837 asection *igroup = elf_sec_group (elf_next_in_group (sec));
2838 struct bfd_elf_section_data *sec_data = elf_section_data (igroup);
2839 unsigned long symndx = sec_data->this_hdr.sh_info;
2840 unsigned long extsymoff = 0;
2841 struct elf_link_hash_entry *h;
2843 if (!elf_bad_symtab (igroup->owner))
2845 Elf_Internal_Shdr *symtab_hdr;
2847 symtab_hdr = &elf_tdata (igroup->owner)->symtab_hdr;
2848 extsymoff = symtab_hdr->sh_info;
2850 h = elf_sym_hashes (igroup->owner)[symndx - extsymoff];
2851 while (h->root.type == bfd_link_hash_indirect
2852 || h->root.type == bfd_link_hash_warning)
2853 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2855 elf_section_data (sec)->this_hdr.sh_info = h->indx;
2858 /* The contents won't be allocated for "ld -r" or objcopy. */
2860 if (sec->contents == NULL)
2863 sec->contents = (unsigned char *) bfd_alloc (abfd, sec->size);
2865 /* Arrange for the section to be written out. */
2866 elf_section_data (sec)->this_hdr.contents = sec->contents;
2867 if (sec->contents == NULL)
2874 loc = sec->contents + sec->size;
2876 /* Get the pointer to the first section in the group that gas
2877 squirreled away here. objcopy arranges for this to be set to the
2878 start of the input section group. */
2879 first = elt = elf_next_in_group (sec);
2881 /* First element is a flag word. Rest of section is elf section
2882 indices for all the sections of the group. Write them backwards
2883 just to keep the group in the same order as given in .section
2884 directives, not that it matters. */
2891 s = s->output_section;
2893 && !bfd_is_abs_section (s))
2895 unsigned int idx = elf_section_data (s)->this_idx;
2898 H_PUT_32 (abfd, idx, loc);
2900 elt = elf_next_in_group (elt);
2905 if ((loc -= 4) != sec->contents)
2908 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2911 /* Assign all ELF section numbers. The dummy first section is handled here
2912 too. The link/info pointers for the standard section types are filled
2913 in here too, while we're at it. */
2916 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
2918 struct elf_obj_tdata *t = elf_tdata (abfd);
2920 unsigned int section_number, secn;
2921 Elf_Internal_Shdr **i_shdrp;
2922 struct bfd_elf_section_data *d;
2923 bfd_boolean need_symtab;
2927 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2929 /* SHT_GROUP sections are in relocatable files only. */
2930 if (link_info == NULL || link_info->relocatable)
2932 /* Put SHT_GROUP sections first. */
2933 for (sec = abfd->sections; sec != NULL; sec = sec->next)
2935 d = elf_section_data (sec);
2937 if (d->this_hdr.sh_type == SHT_GROUP)
2939 if (sec->flags & SEC_LINKER_CREATED)
2941 /* Remove the linker created SHT_GROUP sections. */
2942 bfd_section_list_remove (abfd, sec);
2943 abfd->section_count--;
2946 d->this_idx = section_number++;
2951 for (sec = abfd->sections; sec; sec = sec->next)
2953 d = elf_section_data (sec);
2955 if (d->this_hdr.sh_type != SHT_GROUP)
2956 d->this_idx = section_number++;
2957 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2960 d->rel.idx = section_number++;
2961 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel.hdr->sh_name);
2968 d->rela.idx = section_number++;
2969 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rela.hdr->sh_name);
2975 t->shstrtab_section = section_number++;
2976 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2977 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2979 need_symtab = (bfd_get_symcount (abfd) > 0
2980 || (link_info == NULL
2981 && ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
2985 t->symtab_section = section_number++;
2986 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2987 if (section_number > ((SHN_LORESERVE - 2) & 0xFFFF))
2989 t->symtab_shndx_section = section_number++;
2990 t->symtab_shndx_hdr.sh_name
2991 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2992 ".symtab_shndx", FALSE);
2993 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2996 t->strtab_section = section_number++;
2997 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
3000 if (section_number >= SHN_LORESERVE)
3002 _bfd_error_handler (_("%B: too many sections: %u"),
3003 abfd, section_number);
3007 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
3008 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3010 elf_numsections (abfd) = section_number;
3011 elf_elfheader (abfd)->e_shnum = section_number;
3013 /* Set up the list of section header pointers, in agreement with the
3015 i_shdrp = (Elf_Internal_Shdr **) bfd_zalloc2 (abfd, section_number,
3016 sizeof (Elf_Internal_Shdr *));
3017 if (i_shdrp == NULL)
3020 i_shdrp[0] = (Elf_Internal_Shdr *) bfd_zalloc (abfd,
3021 sizeof (Elf_Internal_Shdr));
3022 if (i_shdrp[0] == NULL)
3024 bfd_release (abfd, i_shdrp);
3028 elf_elfsections (abfd) = i_shdrp;
3030 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
3033 i_shdrp[t->symtab_section] = &t->symtab_hdr;
3034 if (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF))
3036 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
3037 t->symtab_shndx_hdr.sh_link = t->symtab_section;
3039 i_shdrp[t->strtab_section] = &t->strtab_hdr;
3040 t->symtab_hdr.sh_link = t->strtab_section;
3043 for (sec = abfd->sections; sec; sec = sec->next)
3048 d = elf_section_data (sec);
3050 i_shdrp[d->this_idx] = &d->this_hdr;
3051 if (d->rel.idx != 0)
3052 i_shdrp[d->rel.idx] = d->rel.hdr;
3053 if (d->rela.idx != 0)
3054 i_shdrp[d->rela.idx] = d->rela.hdr;
3056 /* Fill in the sh_link and sh_info fields while we're at it. */
3058 /* sh_link of a reloc section is the section index of the symbol
3059 table. sh_info is the section index of the section to which
3060 the relocation entries apply. */
3061 if (d->rel.idx != 0)
3063 d->rel.hdr->sh_link = t->symtab_section;
3064 d->rel.hdr->sh_info = d->this_idx;
3066 if (d->rela.idx != 0)
3068 d->rela.hdr->sh_link = t->symtab_section;
3069 d->rela.hdr->sh_info = d->this_idx;
3072 /* We need to set up sh_link for SHF_LINK_ORDER. */
3073 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
3075 s = elf_linked_to_section (sec);
3078 /* elf_linked_to_section points to the input section. */
3079 if (link_info != NULL)
3081 /* Check discarded linkonce section. */
3082 if (discarded_section (s))
3085 (*_bfd_error_handler)
3086 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
3087 abfd, d->this_hdr.bfd_section,
3089 /* Point to the kept section if it has the same
3090 size as the discarded one. */
3091 kept = _bfd_elf_check_kept_section (s, link_info);
3094 bfd_set_error (bfd_error_bad_value);
3100 s = s->output_section;
3101 BFD_ASSERT (s != NULL);
3105 /* Handle objcopy. */
3106 if (s->output_section == NULL)
3108 (*_bfd_error_handler)
3109 (_("%B: sh_link of section `%A' points to removed section `%A' of `%B'"),
3110 abfd, d->this_hdr.bfd_section, s, s->owner);
3111 bfd_set_error (bfd_error_bad_value);
3114 s = s->output_section;
3116 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3121 The Intel C compiler generates SHT_IA_64_UNWIND with
3122 SHF_LINK_ORDER. But it doesn't set the sh_link or
3123 sh_info fields. Hence we could get the situation
3125 const struct elf_backend_data *bed
3126 = get_elf_backend_data (abfd);
3127 if (bed->link_order_error_handler)
3128 bed->link_order_error_handler
3129 (_("%B: warning: sh_link not set for section `%A'"),
3134 switch (d->this_hdr.sh_type)
3138 /* A reloc section which we are treating as a normal BFD
3139 section. sh_link is the section index of the symbol
3140 table. sh_info is the section index of the section to
3141 which the relocation entries apply. We assume that an
3142 allocated reloc section uses the dynamic symbol table.
3143 FIXME: How can we be sure? */
3144 s = bfd_get_section_by_name (abfd, ".dynsym");
3146 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3148 /* We look up the section the relocs apply to by name. */
3150 if (d->this_hdr.sh_type == SHT_REL)
3154 s = bfd_get_section_by_name (abfd, name);
3156 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3160 /* We assume that a section named .stab*str is a stabs
3161 string section. We look for a section with the same name
3162 but without the trailing ``str'', and set its sh_link
3163 field to point to this section. */
3164 if (CONST_STRNEQ (sec->name, ".stab")
3165 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3170 len = strlen (sec->name);
3171 alc = (char *) bfd_malloc (len - 2);
3174 memcpy (alc, sec->name, len - 3);
3175 alc[len - 3] = '\0';
3176 s = bfd_get_section_by_name (abfd, alc);
3180 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3182 /* This is a .stab section. */
3183 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3184 elf_section_data (s)->this_hdr.sh_entsize
3185 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3192 case SHT_GNU_verneed:
3193 case SHT_GNU_verdef:
3194 /* sh_link is the section header index of the string table
3195 used for the dynamic entries, or the symbol table, or the
3197 s = bfd_get_section_by_name (abfd, ".dynstr");
3199 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3202 case SHT_GNU_LIBLIST:
3203 /* sh_link is the section header index of the prelink library
3204 list used for the dynamic entries, or the symbol table, or
3205 the version strings. */
3206 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3207 ? ".dynstr" : ".gnu.libstr");
3209 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3214 case SHT_GNU_versym:
3215 /* sh_link is the section header index of the symbol table
3216 this hash table or version table is for. */
3217 s = bfd_get_section_by_name (abfd, ".dynsym");
3219 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3223 d->this_hdr.sh_link = t->symtab_section;
3227 for (secn = 1; secn < section_number; ++secn)
3228 if (i_shdrp[secn] == NULL)
3229 i_shdrp[secn] = i_shdrp[0];
3231 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3232 i_shdrp[secn]->sh_name);
3237 sym_is_global (bfd *abfd, asymbol *sym)
3239 /* If the backend has a special mapping, use it. */
3240 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3241 if (bed->elf_backend_sym_is_global)
3242 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3244 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK | BSF_GNU_UNIQUE)) != 0
3245 || bfd_is_und_section (bfd_get_section (sym))
3246 || bfd_is_com_section (bfd_get_section (sym)));
3249 /* Don't output section symbols for sections that are not going to be
3250 output, that are duplicates or there is no BFD section. */
3253 ignore_section_sym (bfd *abfd, asymbol *sym)
3255 elf_symbol_type *type_ptr;
3257 if ((sym->flags & BSF_SECTION_SYM) == 0)
3260 type_ptr = elf_symbol_from (abfd, sym);
3261 return ((type_ptr != NULL
3262 && type_ptr->internal_elf_sym.st_shndx != 0
3263 && bfd_is_abs_section (sym->section))
3264 || !(sym->section->owner == abfd
3265 || (sym->section->output_section->owner == abfd
3266 && sym->section->output_offset == 0)
3267 || bfd_is_abs_section (sym->section)));
3270 /* Map symbol from it's internal number to the external number, moving
3271 all local symbols to be at the head of the list. */
3274 elf_map_symbols (bfd *abfd)
3276 unsigned int symcount = bfd_get_symcount (abfd);
3277 asymbol **syms = bfd_get_outsymbols (abfd);
3278 asymbol **sect_syms;
3279 unsigned int num_locals = 0;
3280 unsigned int num_globals = 0;
3281 unsigned int num_locals2 = 0;
3282 unsigned int num_globals2 = 0;
3289 fprintf (stderr, "elf_map_symbols\n");
3293 for (asect = abfd->sections; asect; asect = asect->next)
3295 if (max_index < asect->index)
3296 max_index = asect->index;
3300 sect_syms = (asymbol **) bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
3301 if (sect_syms == NULL)
3303 elf_section_syms (abfd) = sect_syms;
3304 elf_num_section_syms (abfd) = max_index;
3306 /* Init sect_syms entries for any section symbols we have already
3307 decided to output. */
3308 for (idx = 0; idx < symcount; idx++)
3310 asymbol *sym = syms[idx];
3312 if ((sym->flags & BSF_SECTION_SYM) != 0
3314 && !ignore_section_sym (abfd, sym)
3315 && !bfd_is_abs_section (sym->section))
3317 asection *sec = sym->section;
3319 if (sec->owner != abfd)
3320 sec = sec->output_section;
3322 sect_syms[sec->index] = syms[idx];
3326 /* Classify all of the symbols. */
3327 for (idx = 0; idx < symcount; idx++)
3329 if (sym_is_global (abfd, syms[idx]))
3331 else if (!ignore_section_sym (abfd, syms[idx]))
3335 /* We will be adding a section symbol for each normal BFD section. Most
3336 sections will already have a section symbol in outsymbols, but
3337 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3338 at least in that case. */
3339 for (asect = abfd->sections; asect; asect = asect->next)
3341 if (sect_syms[asect->index] == NULL)
3343 if (!sym_is_global (abfd, asect->symbol))
3350 /* Now sort the symbols so the local symbols are first. */
3351 new_syms = (asymbol **) bfd_alloc2 (abfd, num_locals + num_globals,
3352 sizeof (asymbol *));
3354 if (new_syms == NULL)
3357 for (idx = 0; idx < symcount; idx++)
3359 asymbol *sym = syms[idx];
3362 if (sym_is_global (abfd, sym))
3363 i = num_locals + num_globals2++;
3364 else if (!ignore_section_sym (abfd, sym))
3369 sym->udata.i = i + 1;
3371 for (asect = abfd->sections; asect; asect = asect->next)
3373 if (sect_syms[asect->index] == NULL)
3375 asymbol *sym = asect->symbol;
3378 sect_syms[asect->index] = sym;
3379 if (!sym_is_global (abfd, sym))
3382 i = num_locals + num_globals2++;
3384 sym->udata.i = i + 1;
3388 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3390 elf_num_locals (abfd) = num_locals;
3391 elf_num_globals (abfd) = num_globals;
3395 /* Align to the maximum file alignment that could be required for any
3396 ELF data structure. */
3398 static inline file_ptr
3399 align_file_position (file_ptr off, int align)
3401 return (off + align - 1) & ~(align - 1);
3404 /* Assign a file position to a section, optionally aligning to the
3405 required section alignment. */
3408 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3412 if (align && i_shdrp->sh_addralign > 1)
3413 offset = BFD_ALIGN (offset, i_shdrp->sh_addralign);
3414 i_shdrp->sh_offset = offset;
3415 if (i_shdrp->bfd_section != NULL)
3416 i_shdrp->bfd_section->filepos = offset;
3417 if (i_shdrp->sh_type != SHT_NOBITS)
3418 offset += i_shdrp->sh_size;
3422 /* Compute the file positions we are going to put the sections at, and
3423 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3424 is not NULL, this is being called by the ELF backend linker. */
3427 _bfd_elf_compute_section_file_positions (bfd *abfd,
3428 struct bfd_link_info *link_info)
3430 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3431 struct fake_section_arg fsargs;
3433 struct bfd_strtab_hash *strtab = NULL;
3434 Elf_Internal_Shdr *shstrtab_hdr;
3435 bfd_boolean need_symtab;
3437 if (abfd->output_has_begun)
3440 /* Do any elf backend specific processing first. */
3441 if (bed->elf_backend_begin_write_processing)
3442 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3444 if (! prep_headers (abfd))
3447 /* Post process the headers if necessary. */
3448 if (bed->elf_backend_post_process_headers)
3449 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3451 fsargs.failed = FALSE;
3452 fsargs.link_info = link_info;
3453 bfd_map_over_sections (abfd, elf_fake_sections, &fsargs);
3457 if (!assign_section_numbers (abfd, link_info))
3460 /* The backend linker builds symbol table information itself. */
3461 need_symtab = (link_info == NULL
3462 && (bfd_get_symcount (abfd) > 0
3463 || ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
3467 /* Non-zero if doing a relocatable link. */
3468 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3470 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3475 if (link_info == NULL)
3477 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3482 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3483 /* sh_name was set in prep_headers. */
3484 shstrtab_hdr->sh_type = SHT_STRTAB;
3485 shstrtab_hdr->sh_flags = 0;
3486 shstrtab_hdr->sh_addr = 0;
3487 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3488 shstrtab_hdr->sh_entsize = 0;
3489 shstrtab_hdr->sh_link = 0;
3490 shstrtab_hdr->sh_info = 0;
3491 /* sh_offset is set in assign_file_positions_except_relocs. */
3492 shstrtab_hdr->sh_addralign = 1;
3494 if (!assign_file_positions_except_relocs (abfd, link_info))
3500 Elf_Internal_Shdr *hdr;
3502 off = elf_tdata (abfd)->next_file_pos;
3504 hdr = &elf_tdata (abfd)->symtab_hdr;
3505 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3507 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3508 if (hdr->sh_size != 0)
3509 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3511 hdr = &elf_tdata (abfd)->strtab_hdr;
3512 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3514 elf_tdata (abfd)->next_file_pos = off;
3516 /* Now that we know where the .strtab section goes, write it
3518 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3519 || ! _bfd_stringtab_emit (abfd, strtab))
3521 _bfd_stringtab_free (strtab);
3524 abfd->output_has_begun = TRUE;
3529 /* Make an initial estimate of the size of the program header. If we
3530 get the number wrong here, we'll redo section placement. */
3532 static bfd_size_type
3533 get_program_header_size (bfd *abfd, struct bfd_link_info *info)
3537 const struct elf_backend_data *bed;
3539 /* Assume we will need exactly two PT_LOAD segments: one for text
3540 and one for data. */
3543 s = bfd_get_section_by_name (abfd, ".interp");
3544 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3546 /* If we have a loadable interpreter section, we need a
3547 PT_INTERP segment. In this case, assume we also need a
3548 PT_PHDR segment, although that may not be true for all
3553 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
3555 /* We need a PT_DYNAMIC segment. */
3559 if (info != NULL && info->relro)
3561 /* We need a PT_GNU_RELRO segment. */
3565 if (elf_tdata (abfd)->eh_frame_hdr)
3567 /* We need a PT_GNU_EH_FRAME segment. */
3571 if (elf_tdata (abfd)->stack_flags)
3573 /* We need a PT_GNU_STACK segment. */
3577 for (s = abfd->sections; s != NULL; s = s->next)
3579 if ((s->flags & SEC_LOAD) != 0
3580 && CONST_STRNEQ (s->name, ".note"))
3582 /* We need a PT_NOTE segment. */
3584 /* Try to create just one PT_NOTE segment
3585 for all adjacent loadable .note* sections.
3586 gABI requires that within a PT_NOTE segment
3587 (and also inside of each SHT_NOTE section)
3588 each note is padded to a multiple of 4 size,
3589 so we check whether the sections are correctly
3591 if (s->alignment_power == 2)
3592 while (s->next != NULL
3593 && s->next->alignment_power == 2
3594 && (s->next->flags & SEC_LOAD) != 0
3595 && CONST_STRNEQ (s->next->name, ".note"))
3600 for (s = abfd->sections; s != NULL; s = s->next)
3602 if (s->flags & SEC_THREAD_LOCAL)
3604 /* We need a PT_TLS segment. */
3610 /* Let the backend count up any program headers it might need. */
3611 bed = get_elf_backend_data (abfd);
3612 if (bed->elf_backend_additional_program_headers)
3616 a = (*bed->elf_backend_additional_program_headers) (abfd, info);
3622 return segs * bed->s->sizeof_phdr;
3625 /* Find the segment that contains the output_section of section. */
3628 _bfd_elf_find_segment_containing_section (bfd * abfd, asection * section)
3630 struct elf_segment_map *m;
3631 Elf_Internal_Phdr *p;
3633 for (m = elf_tdata (abfd)->segment_map,
3634 p = elf_tdata (abfd)->phdr;
3640 for (i = m->count - 1; i >= 0; i--)
3641 if (m->sections[i] == section)
3648 /* Create a mapping from a set of sections to a program segment. */
3650 static struct elf_segment_map *
3651 make_mapping (bfd *abfd,
3652 asection **sections,
3657 struct elf_segment_map *m;
3662 amt = sizeof (struct elf_segment_map);
3663 amt += (to - from - 1) * sizeof (asection *);
3664 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3668 m->p_type = PT_LOAD;
3669 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3670 m->sections[i - from] = *hdrpp;
3671 m->count = to - from;
3673 if (from == 0 && phdr)
3675 /* Include the headers in the first PT_LOAD segment. */
3676 m->includes_filehdr = 1;
3677 m->includes_phdrs = 1;
3683 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3686 struct elf_segment_map *
3687 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3689 struct elf_segment_map *m;
3691 m = (struct elf_segment_map *) bfd_zalloc (abfd,
3692 sizeof (struct elf_segment_map));
3696 m->p_type = PT_DYNAMIC;
3698 m->sections[0] = dynsec;
3703 /* Possibly add or remove segments from the segment map. */
3706 elf_modify_segment_map (bfd *abfd,
3707 struct bfd_link_info *info,
3708 bfd_boolean remove_empty_load)
3710 struct elf_segment_map **m;
3711 const struct elf_backend_data *bed;
3713 /* The placement algorithm assumes that non allocated sections are
3714 not in PT_LOAD segments. We ensure this here by removing such
3715 sections from the segment map. We also remove excluded
3716 sections. Finally, any PT_LOAD segment without sections is
3718 m = &elf_tdata (abfd)->segment_map;
3721 unsigned int i, new_count;
3723 for (new_count = 0, i = 0; i < (*m)->count; i++)
3725 if (((*m)->sections[i]->flags & SEC_EXCLUDE) == 0
3726 && (((*m)->sections[i]->flags & SEC_ALLOC) != 0
3727 || (*m)->p_type != PT_LOAD))
3729 (*m)->sections[new_count] = (*m)->sections[i];
3733 (*m)->count = new_count;
3735 if (remove_empty_load && (*m)->p_type == PT_LOAD && (*m)->count == 0)
3741 bed = get_elf_backend_data (abfd);
3742 if (bed->elf_backend_modify_segment_map != NULL)
3744 if (!(*bed->elf_backend_modify_segment_map) (abfd, info))
3751 /* Set up a mapping from BFD sections to program segments. */
3754 _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
3757 struct elf_segment_map *m;
3758 asection **sections = NULL;
3759 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3760 bfd_boolean no_user_phdrs;
3762 no_user_phdrs = elf_tdata (abfd)->segment_map == NULL;
3765 info->user_phdrs = !no_user_phdrs;
3767 if (no_user_phdrs && bfd_count_sections (abfd) != 0)
3771 struct elf_segment_map *mfirst;
3772 struct elf_segment_map **pm;
3775 unsigned int phdr_index;
3776 bfd_vma maxpagesize;
3778 bfd_boolean phdr_in_segment = TRUE;
3779 bfd_boolean writable;
3781 asection *first_tls = NULL;
3782 asection *dynsec, *eh_frame_hdr;
3784 bfd_vma addr_mask, wrap_to = 0;
3786 /* Select the allocated sections, and sort them. */
3788 sections = (asection **) bfd_malloc2 (bfd_count_sections (abfd),
3789 sizeof (asection *));
3790 if (sections == NULL)
3793 /* Calculate top address, avoiding undefined behaviour of shift
3794 left operator when shift count is equal to size of type
3796 addr_mask = ((bfd_vma) 1 << (bfd_arch_bits_per_address (abfd) - 1)) - 1;
3797 addr_mask = (addr_mask << 1) + 1;
3800 for (s = abfd->sections; s != NULL; s = s->next)
3802 if ((s->flags & SEC_ALLOC) != 0)
3806 /* A wrapping section potentially clashes with header. */
3807 if (((s->lma + s->size) & addr_mask) < (s->lma & addr_mask))
3808 wrap_to = (s->lma + s->size) & addr_mask;
3811 BFD_ASSERT (i <= bfd_count_sections (abfd));
3814 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3816 /* Build the mapping. */
3821 /* If we have a .interp section, then create a PT_PHDR segment for
3822 the program headers and a PT_INTERP segment for the .interp
3824 s = bfd_get_section_by_name (abfd, ".interp");
3825 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3827 amt = sizeof (struct elf_segment_map);
3828 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3832 m->p_type = PT_PHDR;
3833 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3834 m->p_flags = PF_R | PF_X;
3835 m->p_flags_valid = 1;
3836 m->includes_phdrs = 1;
3841 amt = sizeof (struct elf_segment_map);
3842 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3846 m->p_type = PT_INTERP;
3854 /* Look through the sections. We put sections in the same program
3855 segment when the start of the second section can be placed within
3856 a few bytes of the end of the first section. */
3860 maxpagesize = bed->maxpagesize;
3862 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3864 && (dynsec->flags & SEC_LOAD) == 0)
3867 /* Deal with -Ttext or something similar such that the first section
3868 is not adjacent to the program headers. This is an
3869 approximation, since at this point we don't know exactly how many
3870 program headers we will need. */
3873 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
3875 if (phdr_size == (bfd_size_type) -1)
3876 phdr_size = get_program_header_size (abfd, info);
3877 phdr_size += bed->s->sizeof_ehdr;
3878 if ((abfd->flags & D_PAGED) == 0
3879 || (sections[0]->lma & addr_mask) < phdr_size
3880 || ((sections[0]->lma & addr_mask) % maxpagesize
3881 < phdr_size % maxpagesize)
3882 || (sections[0]->lma & addr_mask & -maxpagesize) < wrap_to)
3883 phdr_in_segment = FALSE;
3886 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3889 bfd_boolean new_segment;
3893 /* See if this section and the last one will fit in the same
3896 if (last_hdr == NULL)
3898 /* If we don't have a segment yet, then we don't need a new
3899 one (we build the last one after this loop). */
3900 new_segment = FALSE;
3902 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3904 /* If this section has a different relation between the
3905 virtual address and the load address, then we need a new
3909 else if (hdr->lma < last_hdr->lma + last_size
3910 || last_hdr->lma + last_size < last_hdr->lma)
3912 /* If this section has a load address that makes it overlap
3913 the previous section, then we need a new segment. */
3916 /* In the next test we have to be careful when last_hdr->lma is close
3917 to the end of the address space. If the aligned address wraps
3918 around to the start of the address space, then there are no more
3919 pages left in memory and it is OK to assume that the current
3920 section can be included in the current segment. */
3921 else if ((BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
3923 && (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
3926 /* If putting this section in this segment would force us to
3927 skip a page in the segment, then we need a new segment. */
3930 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3931 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3933 /* We don't want to put a loadable section after a
3934 nonloadable section in the same segment.
3935 Consider .tbss sections as loadable for this purpose. */
3938 else if ((abfd->flags & D_PAGED) == 0)
3940 /* If the file is not demand paged, which means that we
3941 don't require the sections to be correctly aligned in the
3942 file, then there is no other reason for a new segment. */
3943 new_segment = FALSE;
3946 && (hdr->flags & SEC_READONLY) == 0
3947 && (((last_hdr->lma + last_size - 1) & -maxpagesize)
3948 != (hdr->lma & -maxpagesize)))
3950 /* We don't want to put a writable section in a read only
3951 segment, unless they are on the same page in memory
3952 anyhow. We already know that the last section does not
3953 bring us past the current section on the page, so the
3954 only case in which the new section is not on the same
3955 page as the previous section is when the previous section
3956 ends precisely on a page boundary. */
3961 /* Otherwise, we can use the same segment. */
3962 new_segment = FALSE;
3965 /* Allow interested parties a chance to override our decision. */
3966 if (last_hdr != NULL
3968 && info->callbacks->override_segment_assignment != NULL)
3970 = info->callbacks->override_segment_assignment (info, abfd, hdr,
3976 if ((hdr->flags & SEC_READONLY) == 0)
3979 /* .tbss sections effectively have zero size. */
3980 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
3981 != SEC_THREAD_LOCAL)
3982 last_size = hdr->size;
3988 /* We need a new program segment. We must create a new program
3989 header holding all the sections from phdr_index until hdr. */
3991 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3998 if ((hdr->flags & SEC_READONLY) == 0)
4004 /* .tbss sections effectively have zero size. */
4005 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
4006 last_size = hdr->size;
4010 phdr_in_segment = FALSE;
4013 /* Create a final PT_LOAD program segment, but not if it's just
4015 if (last_hdr != NULL
4016 && (i - phdr_index != 1
4017 || ((last_hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
4018 != SEC_THREAD_LOCAL)))
4020 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
4028 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
4031 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
4038 /* For each batch of consecutive loadable .note sections,
4039 add a PT_NOTE segment. We don't use bfd_get_section_by_name,
4040 because if we link together nonloadable .note sections and
4041 loadable .note sections, we will generate two .note sections
4042 in the output file. FIXME: Using names for section types is
4044 for (s = abfd->sections; s != NULL; s = s->next)
4046 if ((s->flags & SEC_LOAD) != 0
4047 && CONST_STRNEQ (s->name, ".note"))
4052 amt = sizeof (struct elf_segment_map);
4053 if (s->alignment_power == 2)
4054 for (s2 = s; s2->next != NULL; s2 = s2->next)
4056 if (s2->next->alignment_power == 2
4057 && (s2->next->flags & SEC_LOAD) != 0
4058 && CONST_STRNEQ (s2->next->name, ".note")
4059 && align_power (s2->lma + s2->size, 2)
4065 amt += (count - 1) * sizeof (asection *);
4066 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4070 m->p_type = PT_NOTE;
4074 m->sections[m->count - count--] = s;
4075 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
4078 m->sections[m->count - 1] = s;
4079 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
4083 if (s->flags & SEC_THREAD_LOCAL)
4091 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
4094 amt = sizeof (struct elf_segment_map);
4095 amt += (tls_count - 1) * sizeof (asection *);
4096 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4101 m->count = tls_count;
4102 /* Mandated PF_R. */
4104 m->p_flags_valid = 1;
4105 for (i = 0; i < (unsigned int) tls_count; ++i)
4107 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
4108 m->sections[i] = first_tls;
4109 first_tls = first_tls->next;
4116 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
4118 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
4119 if (eh_frame_hdr != NULL
4120 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
4122 amt = sizeof (struct elf_segment_map);
4123 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4127 m->p_type = PT_GNU_EH_FRAME;
4129 m->sections[0] = eh_frame_hdr->output_section;
4135 if (elf_tdata (abfd)->stack_flags)
4137 amt = sizeof (struct elf_segment_map);
4138 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4142 m->p_type = PT_GNU_STACK;
4143 m->p_flags = elf_tdata (abfd)->stack_flags;
4144 m->p_align = bed->stack_align;
4145 m->p_flags_valid = 1;
4146 m->p_align_valid = m->p_align != 0;
4147 if (info->stacksize > 0)
4149 m->p_size = info->stacksize;
4150 m->p_size_valid = 1;
4157 if (info != NULL && info->relro)
4159 for (m = mfirst; m != NULL; m = m->next)
4161 if (m->p_type == PT_LOAD
4163 && m->sections[0]->vma >= info->relro_start
4164 && m->sections[0]->vma < info->relro_end)
4167 while (--i != (unsigned) -1)
4168 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS))
4169 == (SEC_LOAD | SEC_HAS_CONTENTS))
4172 if (i == (unsigned) -1)
4175 if (m->sections[i]->vma + m->sections[i]->size
4181 /* Make a PT_GNU_RELRO segment only when it isn't empty. */
4184 amt = sizeof (struct elf_segment_map);
4185 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4189 m->p_type = PT_GNU_RELRO;
4191 m->p_flags_valid = 1;
4199 elf_tdata (abfd)->segment_map = mfirst;
4202 if (!elf_modify_segment_map (abfd, info, no_user_phdrs))
4205 for (count = 0, m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4207 elf_tdata (abfd)->program_header_size = count * bed->s->sizeof_phdr;
4212 if (sections != NULL)
4217 /* Sort sections by address. */
4220 elf_sort_sections (const void *arg1, const void *arg2)
4222 const asection *sec1 = *(const asection **) arg1;
4223 const asection *sec2 = *(const asection **) arg2;
4224 bfd_size_type size1, size2;
4226 /* Sort by LMA first, since this is the address used to
4227 place the section into a segment. */
4228 if (sec1->lma < sec2->lma)
4230 else if (sec1->lma > sec2->lma)
4233 /* Then sort by VMA. Normally the LMA and the VMA will be
4234 the same, and this will do nothing. */
4235 if (sec1->vma < sec2->vma)
4237 else if (sec1->vma > sec2->vma)
4240 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
4242 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
4248 /* If the indicies are the same, do not return 0
4249 here, but continue to try the next comparison. */
4250 if (sec1->target_index - sec2->target_index != 0)
4251 return sec1->target_index - sec2->target_index;
4256 else if (TOEND (sec2))
4261 /* Sort by size, to put zero sized sections
4262 before others at the same address. */
4264 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
4265 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
4272 return sec1->target_index - sec2->target_index;
4275 /* Ian Lance Taylor writes:
4277 We shouldn't be using % with a negative signed number. That's just
4278 not good. We have to make sure either that the number is not
4279 negative, or that the number has an unsigned type. When the types
4280 are all the same size they wind up as unsigned. When file_ptr is a
4281 larger signed type, the arithmetic winds up as signed long long,
4284 What we're trying to say here is something like ``increase OFF by
4285 the least amount that will cause it to be equal to the VMA modulo
4287 /* In other words, something like:
4289 vma_offset = m->sections[0]->vma % bed->maxpagesize;
4290 off_offset = off % bed->maxpagesize;
4291 if (vma_offset < off_offset)
4292 adjustment = vma_offset + bed->maxpagesize - off_offset;
4294 adjustment = vma_offset - off_offset;
4296 which can can be collapsed into the expression below. */
4299 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
4301 return ((vma - off) % maxpagesize);
4305 print_segment_map (const struct elf_segment_map *m)
4308 const char *pt = get_segment_type (m->p_type);
4313 if (m->p_type >= PT_LOPROC && m->p_type <= PT_HIPROC)
4314 sprintf (buf, "LOPROC+%7.7x",
4315 (unsigned int) (m->p_type - PT_LOPROC));
4316 else if (m->p_type >= PT_LOOS && m->p_type <= PT_HIOS)
4317 sprintf (buf, "LOOS+%7.7x",
4318 (unsigned int) (m->p_type - PT_LOOS));
4320 snprintf (buf, sizeof (buf), "%8.8x",
4321 (unsigned int) m->p_type);
4325 fprintf (stderr, "%s:", pt);
4326 for (j = 0; j < m->count; j++)
4327 fprintf (stderr, " %s", m->sections [j]->name);
4333 write_zeros (bfd *abfd, file_ptr pos, bfd_size_type len)
4338 if (bfd_seek (abfd, pos, SEEK_SET) != 0)
4340 buf = bfd_zmalloc (len);
4343 ret = bfd_bwrite (buf, len, abfd) == len;
4348 /* Assign file positions to the sections based on the mapping from
4349 sections to segments. This function also sets up some fields in
4353 assign_file_positions_for_load_sections (bfd *abfd,
4354 struct bfd_link_info *link_info)
4356 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4357 struct elf_segment_map *m;
4358 Elf_Internal_Phdr *phdrs;
4359 Elf_Internal_Phdr *p;
4361 bfd_size_type maxpagesize;
4364 bfd_vma header_pad = 0;
4366 if (link_info == NULL
4367 && !_bfd_elf_map_sections_to_segments (abfd, link_info))
4371 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4375 header_pad = m->header_size;
4380 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
4381 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
4385 /* PR binutils/12467. */
4386 elf_elfheader (abfd)->e_phoff = 0;
4387 elf_elfheader (abfd)->e_phentsize = 0;
4390 elf_elfheader (abfd)->e_phnum = alloc;
4392 if (elf_tdata (abfd)->program_header_size == (bfd_size_type) -1)
4393 elf_tdata (abfd)->program_header_size = alloc * bed->s->sizeof_phdr;
4395 BFD_ASSERT (elf_tdata (abfd)->program_header_size
4396 >= alloc * bed->s->sizeof_phdr);
4400 elf_tdata (abfd)->next_file_pos = bed->s->sizeof_ehdr;
4404 /* We're writing the size in elf_tdata (abfd)->program_header_size,
4405 see assign_file_positions_except_relocs, so make sure we have
4406 that amount allocated, with trailing space cleared.
4407 The variable alloc contains the computed need, while elf_tdata
4408 (abfd)->program_header_size contains the size used for the
4410 See ld/emultempl/elf-generic.em:gld${EMULATION_NAME}_map_segments
4411 where the layout is forced to according to a larger size in the
4412 last iterations for the testcase ld-elf/header. */
4413 BFD_ASSERT (elf_tdata (abfd)->program_header_size % bed->s->sizeof_phdr
4415 phdrs = (Elf_Internal_Phdr *)
4417 (elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr),
4418 sizeof (Elf_Internal_Phdr));
4419 elf_tdata (abfd)->phdr = phdrs;
4424 if ((abfd->flags & D_PAGED) != 0)
4425 maxpagesize = bed->maxpagesize;
4427 off = bed->s->sizeof_ehdr;
4428 off += alloc * bed->s->sizeof_phdr;
4429 if (header_pad < (bfd_vma) off)
4435 for (m = elf_tdata (abfd)->segment_map, p = phdrs, j = 0;
4437 m = m->next, p++, j++)
4441 bfd_boolean no_contents;
4443 /* If elf_segment_map is not from map_sections_to_segments, the
4444 sections may not be correctly ordered. NOTE: sorting should
4445 not be done to the PT_NOTE section of a corefile, which may
4446 contain several pseudo-sections artificially created by bfd.
4447 Sorting these pseudo-sections breaks things badly. */
4449 && !(elf_elfheader (abfd)->e_type == ET_CORE
4450 && m->p_type == PT_NOTE))
4451 qsort (m->sections, (size_t) m->count, sizeof (asection *),
4454 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4455 number of sections with contents contributing to both p_filesz
4456 and p_memsz, followed by a number of sections with no contents
4457 that just contribute to p_memsz. In this loop, OFF tracks next
4458 available file offset for PT_LOAD and PT_NOTE segments. */
4459 p->p_type = m->p_type;
4460 p->p_flags = m->p_flags;
4465 p->p_vaddr = m->sections[0]->vma - m->p_vaddr_offset;
4467 if (m->p_paddr_valid)
4468 p->p_paddr = m->p_paddr;
4469 else if (m->count == 0)
4472 p->p_paddr = m->sections[0]->lma - m->p_vaddr_offset;
4474 if (p->p_type == PT_LOAD
4475 && (abfd->flags & D_PAGED) != 0)
4477 /* p_align in demand paged PT_LOAD segments effectively stores
4478 the maximum page size. When copying an executable with
4479 objcopy, we set m->p_align from the input file. Use this
4480 value for maxpagesize rather than bed->maxpagesize, which
4481 may be different. Note that we use maxpagesize for PT_TLS
4482 segment alignment later in this function, so we are relying
4483 on at least one PT_LOAD segment appearing before a PT_TLS
4485 if (m->p_align_valid)
4486 maxpagesize = m->p_align;
4488 p->p_align = maxpagesize;
4490 else if (m->p_align_valid)
4491 p->p_align = m->p_align;
4492 else if (m->count == 0)
4493 p->p_align = 1 << bed->s->log_file_align;
4497 no_contents = FALSE;
4499 if (p->p_type == PT_LOAD
4502 bfd_size_type align;
4503 unsigned int align_power = 0;
4505 if (m->p_align_valid)
4509 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4511 unsigned int secalign;
4513 secalign = bfd_get_section_alignment (abfd, *secpp);
4514 if (secalign > align_power)
4515 align_power = secalign;
4517 align = (bfd_size_type) 1 << align_power;
4518 if (align < maxpagesize)
4519 align = maxpagesize;
4522 for (i = 0; i < m->count; i++)
4523 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
4524 /* If we aren't making room for this section, then
4525 it must be SHT_NOBITS regardless of what we've
4526 set via struct bfd_elf_special_section. */
4527 elf_section_type (m->sections[i]) = SHT_NOBITS;
4529 /* Find out whether this segment contains any loadable
4532 for (i = 0; i < m->count; i++)
4533 if (elf_section_type (m->sections[i]) != SHT_NOBITS)
4535 no_contents = FALSE;
4539 off_adjust = vma_page_aligned_bias (p->p_vaddr, off, align);
4543 /* We shouldn't need to align the segment on disk since
4544 the segment doesn't need file space, but the gABI
4545 arguably requires the alignment and glibc ld.so
4546 checks it. So to comply with the alignment
4547 requirement but not waste file space, we adjust
4548 p_offset for just this segment. (OFF_ADJUST is
4549 subtracted from OFF later.) This may put p_offset
4550 past the end of file, but that shouldn't matter. */
4555 /* Make sure the .dynamic section is the first section in the
4556 PT_DYNAMIC segment. */
4557 else if (p->p_type == PT_DYNAMIC
4559 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4562 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4564 bfd_set_error (bfd_error_bad_value);
4567 /* Set the note section type to SHT_NOTE. */
4568 else if (p->p_type == PT_NOTE)
4569 for (i = 0; i < m->count; i++)
4570 elf_section_type (m->sections[i]) = SHT_NOTE;
4576 if (m->includes_filehdr)
4578 if (!m->p_flags_valid)
4580 p->p_filesz = bed->s->sizeof_ehdr;
4581 p->p_memsz = bed->s->sizeof_ehdr;
4584 if (p->p_vaddr < (bfd_vma) off)
4586 (*_bfd_error_handler)
4587 (_("%B: Not enough room for program headers, try linking with -N"),
4589 bfd_set_error (bfd_error_bad_value);
4594 if (!m->p_paddr_valid)
4599 if (m->includes_phdrs)
4601 if (!m->p_flags_valid)
4604 if (!m->includes_filehdr)
4606 p->p_offset = bed->s->sizeof_ehdr;
4610 p->p_vaddr -= off - p->p_offset;
4611 if (!m->p_paddr_valid)
4612 p->p_paddr -= off - p->p_offset;
4616 p->p_filesz += alloc * bed->s->sizeof_phdr;
4617 p->p_memsz += alloc * bed->s->sizeof_phdr;
4620 p->p_filesz += header_pad;
4621 p->p_memsz += header_pad;
4625 if (p->p_type == PT_LOAD
4626 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4628 if (!m->includes_filehdr && !m->includes_phdrs)
4634 adjust = off - (p->p_offset + p->p_filesz);
4636 p->p_filesz += adjust;
4637 p->p_memsz += adjust;
4641 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
4642 maps. Set filepos for sections in PT_LOAD segments, and in
4643 core files, for sections in PT_NOTE segments.
4644 assign_file_positions_for_non_load_sections will set filepos
4645 for other sections and update p_filesz for other segments. */
4646 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4649 bfd_size_type align;
4650 Elf_Internal_Shdr *this_hdr;
4653 this_hdr = &elf_section_data (sec)->this_hdr;
4654 align = (bfd_size_type) 1 << bfd_get_section_alignment (abfd, sec);
4656 if ((p->p_type == PT_LOAD
4657 || p->p_type == PT_TLS)
4658 && (this_hdr->sh_type != SHT_NOBITS
4659 || ((this_hdr->sh_flags & SHF_ALLOC) != 0
4660 && ((this_hdr->sh_flags & SHF_TLS) == 0
4661 || p->p_type == PT_TLS))))
4663 bfd_vma p_start = p->p_paddr;
4664 bfd_vma p_end = p_start + p->p_memsz;
4665 bfd_vma s_start = sec->lma;
4666 bfd_vma adjust = s_start - p_end;
4670 || p_end < p_start))
4672 (*_bfd_error_handler)
4673 (_("%B: section %A lma %#lx adjusted to %#lx"), abfd, sec,
4674 (unsigned long) s_start, (unsigned long) p_end);
4678 p->p_memsz += adjust;
4680 if (this_hdr->sh_type != SHT_NOBITS)
4682 if (p->p_filesz + adjust < p->p_memsz)
4684 /* We have a PROGBITS section following NOBITS ones.
4685 Allocate file space for the NOBITS section(s) and
4687 adjust = p->p_memsz - p->p_filesz;
4688 if (!write_zeros (abfd, off, adjust))
4692 p->p_filesz += adjust;
4696 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4698 /* The section at i == 0 is the one that actually contains
4702 this_hdr->sh_offset = sec->filepos = off;
4703 off += this_hdr->sh_size;
4704 p->p_filesz = this_hdr->sh_size;
4710 /* The rest are fake sections that shouldn't be written. */
4719 if (p->p_type == PT_LOAD)
4721 this_hdr->sh_offset = sec->filepos = off;
4722 if (this_hdr->sh_type != SHT_NOBITS)
4723 off += this_hdr->sh_size;
4725 else if (this_hdr->sh_type == SHT_NOBITS
4726 && (this_hdr->sh_flags & SHF_TLS) != 0
4727 && this_hdr->sh_offset == 0)
4729 /* This is a .tbss section that didn't get a PT_LOAD.
4730 (See _bfd_elf_map_sections_to_segments "Create a
4731 final PT_LOAD".) Set sh_offset to the value it
4732 would have if we had created a zero p_filesz and
4733 p_memsz PT_LOAD header for the section. This
4734 also makes the PT_TLS header have the same
4736 bfd_vma adjust = vma_page_aligned_bias (this_hdr->sh_addr,
4738 this_hdr->sh_offset = sec->filepos = off + adjust;
4741 if (this_hdr->sh_type != SHT_NOBITS)
4743 p->p_filesz += this_hdr->sh_size;
4744 /* A load section without SHF_ALLOC is something like
4745 a note section in a PT_NOTE segment. These take
4746 file space but are not loaded into memory. */
4747 if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4748 p->p_memsz += this_hdr->sh_size;
4750 else if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4752 if (p->p_type == PT_TLS)
4753 p->p_memsz += this_hdr->sh_size;
4755 /* .tbss is special. It doesn't contribute to p_memsz of
4757 else if ((this_hdr->sh_flags & SHF_TLS) == 0)
4758 p->p_memsz += this_hdr->sh_size;
4761 if (align > p->p_align
4762 && !m->p_align_valid
4763 && (p->p_type != PT_LOAD
4764 || (abfd->flags & D_PAGED) == 0))
4768 if (!m->p_flags_valid)
4771 if ((this_hdr->sh_flags & SHF_EXECINSTR) != 0)
4773 if ((this_hdr->sh_flags & SHF_WRITE) != 0)
4779 /* Check that all sections are in a PT_LOAD segment.
4780 Don't check funky gdb generated core files. */
4781 if (p->p_type == PT_LOAD && bfd_get_format (abfd) != bfd_core)
4783 bfd_boolean check_vma = TRUE;
4785 for (i = 1; i < m->count; i++)
4786 if (m->sections[i]->vma == m->sections[i - 1]->vma
4787 && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i])
4788 ->this_hdr), p) != 0
4789 && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i - 1])
4790 ->this_hdr), p) != 0)
4792 /* Looks like we have overlays packed into the segment. */
4797 for (i = 0; i < m->count; i++)
4799 Elf_Internal_Shdr *this_hdr;
4802 sec = m->sections[i];
4803 this_hdr = &(elf_section_data(sec)->this_hdr);
4804 if (!ELF_SECTION_IN_SEGMENT_1 (this_hdr, p, check_vma, 0)
4805 && !ELF_TBSS_SPECIAL (this_hdr, p))
4807 (*_bfd_error_handler)
4808 (_("%B: section `%A' can't be allocated in segment %d"),
4810 print_segment_map (m);
4816 elf_tdata (abfd)->next_file_pos = off;
4820 /* Assign file positions for the other sections. */
4823 assign_file_positions_for_non_load_sections (bfd *abfd,
4824 struct bfd_link_info *link_info)
4826 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4827 Elf_Internal_Shdr **i_shdrpp;
4828 Elf_Internal_Shdr **hdrpp;
4829 Elf_Internal_Phdr *phdrs;
4830 Elf_Internal_Phdr *p;
4831 struct elf_segment_map *m;
4832 struct elf_segment_map *hdrs_segment;
4833 bfd_vma filehdr_vaddr, filehdr_paddr;
4834 bfd_vma phdrs_vaddr, phdrs_paddr;
4836 unsigned int num_sec;
4840 i_shdrpp = elf_elfsections (abfd);
4841 num_sec = elf_numsections (abfd);
4842 off = elf_tdata (abfd)->next_file_pos;
4843 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4845 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4846 Elf_Internal_Shdr *hdr;
4849 if (hdr->bfd_section != NULL
4850 && (hdr->bfd_section->filepos != 0
4851 || (hdr->sh_type == SHT_NOBITS
4852 && hdr->contents == NULL)))
4853 BFD_ASSERT (hdr->sh_offset == hdr->bfd_section->filepos);
4854 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4856 if (hdr->sh_size != 0)
4857 (*_bfd_error_handler)
4858 (_("%B: warning: allocated section `%s' not in segment"),
4860 (hdr->bfd_section == NULL
4862 : hdr->bfd_section->name));
4863 /* We don't need to page align empty sections. */
4864 if ((abfd->flags & D_PAGED) != 0 && hdr->sh_size != 0)
4865 off += vma_page_aligned_bias (hdr->sh_addr, off,
4868 off += vma_page_aligned_bias (hdr->sh_addr, off,
4870 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4873 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4874 && hdr->bfd_section == NULL)
4875 || hdr == i_shdrpp[tdata->symtab_section]
4876 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4877 || hdr == i_shdrpp[tdata->strtab_section])
4878 hdr->sh_offset = -1;
4880 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4883 /* Now that we have set the section file positions, we can set up
4884 the file positions for the non PT_LOAD segments. */
4888 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4890 hdrs_segment = NULL;
4891 phdrs = elf_tdata (abfd)->phdr;
4892 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4897 if (p->p_type != PT_LOAD)
4900 if (m->includes_filehdr)
4902 filehdr_vaddr = p->p_vaddr;
4903 filehdr_paddr = p->p_paddr;
4905 if (m->includes_phdrs)
4907 phdrs_vaddr = p->p_vaddr;
4908 phdrs_paddr = p->p_paddr;
4909 if (m->includes_filehdr)
4912 phdrs_vaddr += bed->s->sizeof_ehdr;
4913 phdrs_paddr += bed->s->sizeof_ehdr;
4918 if (hdrs_segment != NULL && link_info != NULL)
4920 /* There is a segment that contains both the file headers and the
4921 program headers, so provide a symbol __ehdr_start pointing there.
4922 A program can use this to examine itself robustly. */
4924 struct elf_link_hash_entry *hash
4925 = elf_link_hash_lookup (elf_hash_table (link_info), "__ehdr_start",
4926 FALSE, FALSE, TRUE);
4927 /* If the symbol was referenced and not defined, define it. */
4929 && (hash->root.type == bfd_link_hash_new
4930 || hash->root.type == bfd_link_hash_undefined
4931 || hash->root.type == bfd_link_hash_undefweak
4932 || hash->root.type == bfd_link_hash_common))
4935 if (hdrs_segment->count != 0)
4936 /* The segment contains sections, so use the first one. */
4937 s = hdrs_segment->sections[0];
4939 /* Use the first (i.e. lowest-addressed) section in any segment. */
4940 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4949 hash->root.u.def.value = filehdr_vaddr - s->vma;
4950 hash->root.u.def.section = s;
4954 hash->root.u.def.value = filehdr_vaddr;
4955 hash->root.u.def.section = bfd_abs_section_ptr;
4958 hash->root.type = bfd_link_hash_defined;
4959 hash->def_regular = 1;
4964 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4968 if (p->p_type == PT_GNU_RELRO)
4970 const Elf_Internal_Phdr *lp;
4971 struct elf_segment_map *lm;
4973 if (link_info != NULL)
4975 /* During linking the range of the RELRO segment is passed
4977 for (lm = elf_tdata (abfd)->segment_map, lp = phdrs;
4979 lm = lm->next, lp++)
4981 if (lp->p_type == PT_LOAD
4982 && lp->p_vaddr < link_info->relro_end
4983 && lp->p_vaddr + lp->p_filesz >= link_info->relro_end
4985 && lm->sections[0]->vma >= link_info->relro_start)
4989 /* PR ld/14207. If the RELRO segment doesn't fit in the
4990 LOAD segment, it should be removed. */
4991 BFD_ASSERT (lm != NULL);
4995 /* Otherwise we are copying an executable or shared
4996 library, but we need to use the same linker logic. */
4997 for (lp = phdrs; lp < phdrs + count; ++lp)
4999 if (lp->p_type == PT_LOAD
5000 && lp->p_paddr == p->p_paddr)
5005 if (lp < phdrs + count)
5007 p->p_vaddr = lp->p_vaddr;
5008 p->p_paddr = lp->p_paddr;
5009 p->p_offset = lp->p_offset;
5010 if (link_info != NULL)
5011 p->p_filesz = link_info->relro_end - lp->p_vaddr;
5012 else if (m->p_size_valid)
5013 p->p_filesz = m->p_size;
5016 p->p_memsz = p->p_filesz;
5017 /* Preserve the alignment and flags if they are valid. The
5018 gold linker generates RW/4 for the PT_GNU_RELRO section.
5019 It is better for objcopy/strip to honor these attributes
5020 otherwise gdb will choke when using separate debug files.
5022 if (!m->p_align_valid)
5024 if (!m->p_flags_valid)
5025 p->p_flags = (lp->p_flags & ~PF_W);
5029 memset (p, 0, sizeof *p);
5030 p->p_type = PT_NULL;
5033 else if (p->p_type == PT_GNU_STACK)
5035 if (m->p_size_valid)
5036 p->p_memsz = m->p_size;
5038 else if (m->count != 0)
5040 if (p->p_type != PT_LOAD
5041 && (p->p_type != PT_NOTE
5042 || bfd_get_format (abfd) != bfd_core))
5044 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
5047 p->p_offset = m->sections[0]->filepos;
5048 for (i = m->count; i-- != 0;)
5050 asection *sect = m->sections[i];
5051 Elf_Internal_Shdr *hdr = &elf_section_data (sect)->this_hdr;
5052 if (hdr->sh_type != SHT_NOBITS)
5054 p->p_filesz = (sect->filepos - m->sections[0]->filepos
5061 else if (m->includes_filehdr)
5063 p->p_vaddr = filehdr_vaddr;
5064 if (! m->p_paddr_valid)
5065 p->p_paddr = filehdr_paddr;
5067 else if (m->includes_phdrs)
5069 p->p_vaddr = phdrs_vaddr;
5070 if (! m->p_paddr_valid)
5071 p->p_paddr = phdrs_paddr;
5075 elf_tdata (abfd)->next_file_pos = off;
5080 /* Work out the file positions of all the sections. This is called by
5081 _bfd_elf_compute_section_file_positions. All the section sizes and
5082 VMAs must be known before this is called.
5084 Reloc sections come in two flavours: Those processed specially as
5085 "side-channel" data attached to a section to which they apply, and
5086 those that bfd doesn't process as relocations. The latter sort are
5087 stored in a normal bfd section by bfd_section_from_shdr. We don't
5088 consider the former sort here, unless they form part of the loadable
5089 image. Reloc sections not assigned here will be handled later by
5090 assign_file_positions_for_relocs.
5092 We also don't set the positions of the .symtab and .strtab here. */
5095 assign_file_positions_except_relocs (bfd *abfd,
5096 struct bfd_link_info *link_info)
5098 struct elf_obj_tdata *tdata = elf_tdata (abfd);
5099 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5101 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5103 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
5104 && bfd_get_format (abfd) != bfd_core)
5106 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
5107 unsigned int num_sec = elf_numsections (abfd);
5108 Elf_Internal_Shdr **hdrpp;
5111 /* Start after the ELF header. */
5112 off = i_ehdrp->e_ehsize;
5114 /* We are not creating an executable, which means that we are
5115 not creating a program header, and that the actual order of
5116 the sections in the file is unimportant. */
5117 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
5119 Elf_Internal_Shdr *hdr;
5122 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
5123 && hdr->bfd_section == NULL)
5124 || i == tdata->symtab_section
5125 || i == tdata->symtab_shndx_section
5126 || i == tdata->strtab_section)
5128 hdr->sh_offset = -1;
5131 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
5138 /* Assign file positions for the loaded sections based on the
5139 assignment of sections to segments. */
5140 if (!assign_file_positions_for_load_sections (abfd, link_info))
5143 /* And for non-load sections. */
5144 if (!assign_file_positions_for_non_load_sections (abfd, link_info))
5147 if (bed->elf_backend_modify_program_headers != NULL)
5149 if (!(*bed->elf_backend_modify_program_headers) (abfd, link_info))
5153 /* Write out the program headers. */
5154 alloc = tdata->program_header_size / bed->s->sizeof_phdr;
5155 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
5156 || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
5159 off = tdata->next_file_pos;
5162 /* Place the section headers. */
5163 off = align_file_position (off, 1 << bed->s->log_file_align);
5164 i_ehdrp->e_shoff = off;
5165 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
5167 tdata->next_file_pos = off;
5173 prep_headers (bfd *abfd)
5175 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form. */
5176 struct elf_strtab_hash *shstrtab;
5177 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5179 i_ehdrp = elf_elfheader (abfd);
5181 shstrtab = _bfd_elf_strtab_init ();
5182 if (shstrtab == NULL)
5185 elf_shstrtab (abfd) = shstrtab;
5187 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
5188 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
5189 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
5190 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
5192 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
5193 i_ehdrp->e_ident[EI_DATA] =
5194 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
5195 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
5197 if ((abfd->flags & DYNAMIC) != 0)
5198 i_ehdrp->e_type = ET_DYN;
5199 else if ((abfd->flags & EXEC_P) != 0)
5200 i_ehdrp->e_type = ET_EXEC;
5201 else if (bfd_get_format (abfd) == bfd_core)
5202 i_ehdrp->e_type = ET_CORE;
5204 i_ehdrp->e_type = ET_REL;
5206 switch (bfd_get_arch (abfd))
5208 case bfd_arch_unknown:
5209 i_ehdrp->e_machine = EM_NONE;
5212 /* There used to be a long list of cases here, each one setting
5213 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
5214 in the corresponding bfd definition. To avoid duplication,
5215 the switch was removed. Machines that need special handling
5216 can generally do it in elf_backend_final_write_processing(),
5217 unless they need the information earlier than the final write.
5218 Such need can generally be supplied by replacing the tests for
5219 e_machine with the conditions used to determine it. */
5221 i_ehdrp->e_machine = bed->elf_machine_code;
5224 i_ehdrp->e_version = bed->s->ev_current;
5225 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
5227 /* No program header, for now. */
5228 i_ehdrp->e_phoff = 0;
5229 i_ehdrp->e_phentsize = 0;
5230 i_ehdrp->e_phnum = 0;
5232 /* Each bfd section is section header entry. */
5233 i_ehdrp->e_entry = bfd_get_start_address (abfd);
5234 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
5236 /* If we're building an executable, we'll need a program header table. */
5237 if (abfd->flags & EXEC_P)
5238 /* It all happens later. */
5242 i_ehdrp->e_phentsize = 0;
5243 i_ehdrp->e_phoff = 0;
5246 elf_tdata (abfd)->symtab_hdr.sh_name =
5247 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
5248 elf_tdata (abfd)->strtab_hdr.sh_name =
5249 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
5250 elf_tdata (abfd)->shstrtab_hdr.sh_name =
5251 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
5252 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
5253 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
5254 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
5260 /* Assign file positions for all the reloc sections which are not part
5261 of the loadable file image. */
5264 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
5267 unsigned int i, num_sec;
5268 Elf_Internal_Shdr **shdrpp;
5270 off = elf_tdata (abfd)->next_file_pos;
5272 num_sec = elf_numsections (abfd);
5273 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
5275 Elf_Internal_Shdr *shdrp;
5278 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
5279 && shdrp->sh_offset == -1)
5280 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
5283 elf_tdata (abfd)->next_file_pos = off;
5287 _bfd_elf_write_object_contents (bfd *abfd)
5289 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5290 Elf_Internal_Shdr **i_shdrp;
5292 unsigned int count, num_sec;
5294 if (! abfd->output_has_begun
5295 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
5298 i_shdrp = elf_elfsections (abfd);
5301 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
5305 _bfd_elf_assign_file_positions_for_relocs (abfd);
5307 /* After writing the headers, we need to write the sections too... */
5308 num_sec = elf_numsections (abfd);
5309 for (count = 1; count < num_sec; count++)
5311 if (bed->elf_backend_section_processing)
5312 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
5313 if (i_shdrp[count]->contents)
5315 bfd_size_type amt = i_shdrp[count]->sh_size;
5317 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
5318 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
5323 /* Write out the section header names. */
5324 if (elf_shstrtab (abfd) != NULL
5325 && (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
5326 || !_bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
5329 if (bed->elf_backend_final_write_processing)
5330 (*bed->elf_backend_final_write_processing) (abfd,
5331 elf_tdata (abfd)->linker);
5333 if (!bed->s->write_shdrs_and_ehdr (abfd))
5336 /* This is last since write_shdrs_and_ehdr can touch i_shdrp[0]. */
5337 if (elf_tdata (abfd)->after_write_object_contents)
5338 return (*elf_tdata (abfd)->after_write_object_contents) (abfd);
5344 _bfd_elf_write_corefile_contents (bfd *abfd)
5346 /* Hopefully this can be done just like an object file. */
5347 return _bfd_elf_write_object_contents (abfd);
5350 /* Given a section, search the header to find them. */
5353 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
5355 const struct elf_backend_data *bed;
5356 unsigned int sec_index;
5358 if (elf_section_data (asect) != NULL
5359 && elf_section_data (asect)->this_idx != 0)
5360 return elf_section_data (asect)->this_idx;
5362 if (bfd_is_abs_section (asect))
5363 sec_index = SHN_ABS;
5364 else if (bfd_is_com_section (asect))
5365 sec_index = SHN_COMMON;
5366 else if (bfd_is_und_section (asect))
5367 sec_index = SHN_UNDEF;
5369 sec_index = SHN_BAD;
5371 bed = get_elf_backend_data (abfd);
5372 if (bed->elf_backend_section_from_bfd_section)
5374 int retval = sec_index;
5376 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
5380 if (sec_index == SHN_BAD)
5381 bfd_set_error (bfd_error_nonrepresentable_section);
5386 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
5390 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
5392 asymbol *asym_ptr = *asym_ptr_ptr;
5394 flagword flags = asym_ptr->flags;
5396 /* When gas creates relocations against local labels, it creates its
5397 own symbol for the section, but does put the symbol into the
5398 symbol chain, so udata is 0. When the linker is generating
5399 relocatable output, this section symbol may be for one of the
5400 input sections rather than the output section. */
5401 if (asym_ptr->udata.i == 0
5402 && (flags & BSF_SECTION_SYM)
5403 && asym_ptr->section)
5408 sec = asym_ptr->section;
5409 if (sec->owner != abfd && sec->output_section != NULL)
5410 sec = sec->output_section;
5411 if (sec->owner == abfd
5412 && (indx = sec->index) < elf_num_section_syms (abfd)
5413 && elf_section_syms (abfd)[indx] != NULL)
5414 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
5417 idx = asym_ptr->udata.i;
5421 /* This case can occur when using --strip-symbol on a symbol
5422 which is used in a relocation entry. */
5423 (*_bfd_error_handler)
5424 (_("%B: symbol `%s' required but not present"),
5425 abfd, bfd_asymbol_name (asym_ptr));
5426 bfd_set_error (bfd_error_no_symbols);
5433 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx\n",
5434 (long) asym_ptr, asym_ptr->name, idx, (long) flags);
5442 /* Rewrite program header information. */
5445 rewrite_elf_program_header (bfd *ibfd, bfd *obfd)
5447 Elf_Internal_Ehdr *iehdr;
5448 struct elf_segment_map *map;
5449 struct elf_segment_map *map_first;
5450 struct elf_segment_map **pointer_to_map;
5451 Elf_Internal_Phdr *segment;
5454 unsigned int num_segments;
5455 bfd_boolean phdr_included = FALSE;
5456 bfd_boolean p_paddr_valid;
5457 bfd_vma maxpagesize;
5458 struct elf_segment_map *phdr_adjust_seg = NULL;
5459 unsigned int phdr_adjust_num = 0;
5460 const struct elf_backend_data *bed;
5462 bed = get_elf_backend_data (ibfd);
5463 iehdr = elf_elfheader (ibfd);
5466 pointer_to_map = &map_first;
5468 num_segments = elf_elfheader (ibfd)->e_phnum;
5469 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
5471 /* Returns the end address of the segment + 1. */
5472 #define SEGMENT_END(segment, start) \
5473 (start + (segment->p_memsz > segment->p_filesz \
5474 ? segment->p_memsz : segment->p_filesz))
5476 #define SECTION_SIZE(section, segment) \
5477 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5478 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5479 ? section->size : 0)
5481 /* Returns TRUE if the given section is contained within
5482 the given segment. VMA addresses are compared. */
5483 #define IS_CONTAINED_BY_VMA(section, segment) \
5484 (section->vma >= segment->p_vaddr \
5485 && (section->vma + SECTION_SIZE (section, segment) \
5486 <= (SEGMENT_END (segment, segment->p_vaddr))))
5488 /* Returns TRUE if the given section is contained within
5489 the given segment. LMA addresses are compared. */
5490 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5491 (section->lma >= base \
5492 && (section->lma + SECTION_SIZE (section, segment) \
5493 <= SEGMENT_END (segment, base)))
5495 /* Handle PT_NOTE segment. */
5496 #define IS_NOTE(p, s) \
5497 (p->p_type == PT_NOTE \
5498 && elf_section_type (s) == SHT_NOTE \
5499 && (bfd_vma) s->filepos >= p->p_offset \
5500 && ((bfd_vma) s->filepos + s->size \
5501 <= p->p_offset + p->p_filesz))
5503 /* Special case: corefile "NOTE" section containing regs, prpsinfo
5505 #define IS_COREFILE_NOTE(p, s) \
5507 && bfd_get_format (ibfd) == bfd_core \
5511 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5512 linker, which generates a PT_INTERP section with p_vaddr and
5513 p_memsz set to 0. */
5514 #define IS_SOLARIS_PT_INTERP(p, s) \
5516 && p->p_paddr == 0 \
5517 && p->p_memsz == 0 \
5518 && p->p_filesz > 0 \
5519 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5521 && (bfd_vma) s->filepos >= p->p_offset \
5522 && ((bfd_vma) s->filepos + s->size \
5523 <= p->p_offset + p->p_filesz))
5525 /* Decide if the given section should be included in the given segment.
5526 A section will be included if:
5527 1. It is within the address space of the segment -- we use the LMA
5528 if that is set for the segment and the VMA otherwise,
5529 2. It is an allocated section or a NOTE section in a PT_NOTE
5531 3. There is an output section associated with it,
5532 4. The section has not already been allocated to a previous segment.
5533 5. PT_GNU_STACK segments do not include any sections.
5534 6. PT_TLS segment includes only SHF_TLS sections.
5535 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5536 8. PT_DYNAMIC should not contain empty sections at the beginning
5537 (with the possible exception of .dynamic). */
5538 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
5539 ((((segment->p_paddr \
5540 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5541 : IS_CONTAINED_BY_VMA (section, segment)) \
5542 && (section->flags & SEC_ALLOC) != 0) \
5543 || IS_NOTE (segment, section)) \
5544 && segment->p_type != PT_GNU_STACK \
5545 && (segment->p_type != PT_TLS \
5546 || (section->flags & SEC_THREAD_LOCAL)) \
5547 && (segment->p_type == PT_LOAD \
5548 || segment->p_type == PT_TLS \
5549 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5550 && (segment->p_type != PT_DYNAMIC \
5551 || SECTION_SIZE (section, segment) > 0 \
5552 || (segment->p_paddr \
5553 ? segment->p_paddr != section->lma \
5554 : segment->p_vaddr != section->vma) \
5555 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5557 && !section->segment_mark)
5559 /* If the output section of a section in the input segment is NULL,
5560 it is removed from the corresponding output segment. */
5561 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5562 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
5563 && section->output_section != NULL)
5565 /* Returns TRUE iff seg1 starts after the end of seg2. */
5566 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5567 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5569 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5570 their VMA address ranges and their LMA address ranges overlap.
5571 It is possible to have overlapping VMA ranges without overlapping LMA
5572 ranges. RedBoot images for example can have both .data and .bss mapped
5573 to the same VMA range, but with the .data section mapped to a different
5575 #define SEGMENT_OVERLAPS(seg1, seg2) \
5576 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5577 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5578 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5579 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5581 /* Initialise the segment mark field. */
5582 for (section = ibfd->sections; section != NULL; section = section->next)
5583 section->segment_mark = FALSE;
5585 /* The Solaris linker creates program headers in which all the
5586 p_paddr fields are zero. When we try to objcopy or strip such a
5587 file, we get confused. Check for this case, and if we find it
5588 don't set the p_paddr_valid fields. */
5589 p_paddr_valid = FALSE;
5590 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5593 if (segment->p_paddr != 0)
5595 p_paddr_valid = TRUE;
5599 /* Scan through the segments specified in the program header
5600 of the input BFD. For this first scan we look for overlaps
5601 in the loadable segments. These can be created by weird
5602 parameters to objcopy. Also, fix some solaris weirdness. */
5603 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5608 Elf_Internal_Phdr *segment2;
5610 if (segment->p_type == PT_INTERP)
5611 for (section = ibfd->sections; section; section = section->next)
5612 if (IS_SOLARIS_PT_INTERP (segment, section))
5614 /* Mininal change so that the normal section to segment
5615 assignment code will work. */
5616 segment->p_vaddr = section->vma;
5620 if (segment->p_type != PT_LOAD)
5622 /* Remove PT_GNU_RELRO segment. */
5623 if (segment->p_type == PT_GNU_RELRO)
5624 segment->p_type = PT_NULL;
5628 /* Determine if this segment overlaps any previous segments. */
5629 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2++)
5631 bfd_signed_vma extra_length;
5633 if (segment2->p_type != PT_LOAD
5634 || !SEGMENT_OVERLAPS (segment, segment2))
5637 /* Merge the two segments together. */
5638 if (segment2->p_vaddr < segment->p_vaddr)
5640 /* Extend SEGMENT2 to include SEGMENT and then delete
5642 extra_length = (SEGMENT_END (segment, segment->p_vaddr)
5643 - SEGMENT_END (segment2, segment2->p_vaddr));
5645 if (extra_length > 0)
5647 segment2->p_memsz += extra_length;
5648 segment2->p_filesz += extra_length;
5651 segment->p_type = PT_NULL;
5653 /* Since we have deleted P we must restart the outer loop. */
5655 segment = elf_tdata (ibfd)->phdr;
5660 /* Extend SEGMENT to include SEGMENT2 and then delete
5662 extra_length = (SEGMENT_END (segment2, segment2->p_vaddr)
5663 - SEGMENT_END (segment, segment->p_vaddr));
5665 if (extra_length > 0)
5667 segment->p_memsz += extra_length;
5668 segment->p_filesz += extra_length;
5671 segment2->p_type = PT_NULL;
5676 /* The second scan attempts to assign sections to segments. */
5677 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5681 unsigned int section_count;
5682 asection **sections;
5683 asection *output_section;
5685 bfd_vma matching_lma;
5686 bfd_vma suggested_lma;
5689 asection *first_section;
5690 bfd_boolean first_matching_lma;
5691 bfd_boolean first_suggested_lma;
5693 if (segment->p_type == PT_NULL)
5696 first_section = NULL;
5697 /* Compute how many sections might be placed into this segment. */
5698 for (section = ibfd->sections, section_count = 0;
5700 section = section->next)
5702 /* Find the first section in the input segment, which may be
5703 removed from the corresponding output segment. */
5704 if (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed))
5706 if (first_section == NULL)
5707 first_section = section;
5708 if (section->output_section != NULL)
5713 /* Allocate a segment map big enough to contain
5714 all of the sections we have selected. */
5715 amt = sizeof (struct elf_segment_map);
5716 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5717 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
5721 /* Initialise the fields of the segment map. Default to
5722 using the physical address of the segment in the input BFD. */
5724 map->p_type = segment->p_type;
5725 map->p_flags = segment->p_flags;
5726 map->p_flags_valid = 1;
5728 /* If the first section in the input segment is removed, there is
5729 no need to preserve segment physical address in the corresponding
5731 if (!first_section || first_section->output_section != NULL)
5733 map->p_paddr = segment->p_paddr;
5734 map->p_paddr_valid = p_paddr_valid;
5737 /* Determine if this segment contains the ELF file header
5738 and if it contains the program headers themselves. */
5739 map->includes_filehdr = (segment->p_offset == 0
5740 && segment->p_filesz >= iehdr->e_ehsize);
5741 map->includes_phdrs = 0;
5743 if (!phdr_included || segment->p_type != PT_LOAD)
5745 map->includes_phdrs =
5746 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5747 && (segment->p_offset + segment->p_filesz
5748 >= ((bfd_vma) iehdr->e_phoff
5749 + iehdr->e_phnum * iehdr->e_phentsize)));
5751 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5752 phdr_included = TRUE;
5755 if (section_count == 0)
5757 /* Special segments, such as the PT_PHDR segment, may contain
5758 no sections, but ordinary, loadable segments should contain
5759 something. They are allowed by the ELF spec however, so only
5760 a warning is produced. */
5761 if (segment->p_type == PT_LOAD)
5762 (*_bfd_error_handler) (_("%B: warning: Empty loadable segment"
5763 " detected, is this intentional ?\n"),
5767 *pointer_to_map = map;
5768 pointer_to_map = &map->next;
5773 /* Now scan the sections in the input BFD again and attempt
5774 to add their corresponding output sections to the segment map.
5775 The problem here is how to handle an output section which has
5776 been moved (ie had its LMA changed). There are four possibilities:
5778 1. None of the sections have been moved.
5779 In this case we can continue to use the segment LMA from the
5782 2. All of the sections have been moved by the same amount.
5783 In this case we can change the segment's LMA to match the LMA
5784 of the first section.
5786 3. Some of the sections have been moved, others have not.
5787 In this case those sections which have not been moved can be
5788 placed in the current segment which will have to have its size,
5789 and possibly its LMA changed, and a new segment or segments will
5790 have to be created to contain the other sections.
5792 4. The sections have been moved, but not by the same amount.
5793 In this case we can change the segment's LMA to match the LMA
5794 of the first section and we will have to create a new segment
5795 or segments to contain the other sections.
5797 In order to save time, we allocate an array to hold the section
5798 pointers that we are interested in. As these sections get assigned
5799 to a segment, they are removed from this array. */
5801 sections = (asection **) bfd_malloc2 (section_count, sizeof (asection *));
5802 if (sections == NULL)
5805 /* Step One: Scan for segment vs section LMA conflicts.
5806 Also add the sections to the section array allocated above.
5807 Also add the sections to the current segment. In the common
5808 case, where the sections have not been moved, this means that
5809 we have completely filled the segment, and there is nothing
5814 first_matching_lma = TRUE;
5815 first_suggested_lma = TRUE;
5817 for (section = ibfd->sections;
5819 section = section->next)
5820 if (section == first_section)
5823 for (j = 0; section != NULL; section = section->next)
5825 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5827 output_section = section->output_section;
5829 sections[j++] = section;
5831 /* The Solaris native linker always sets p_paddr to 0.
5832 We try to catch that case here, and set it to the
5833 correct value. Note - some backends require that
5834 p_paddr be left as zero. */
5836 && segment->p_vaddr != 0
5837 && !bed->want_p_paddr_set_to_zero
5839 && output_section->lma != 0
5840 && output_section->vma == (segment->p_vaddr
5841 + (map->includes_filehdr
5844 + (map->includes_phdrs
5846 * iehdr->e_phentsize)
5848 map->p_paddr = segment->p_vaddr;
5850 /* Match up the physical address of the segment with the
5851 LMA address of the output section. */
5852 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5853 || IS_COREFILE_NOTE (segment, section)
5854 || (bed->want_p_paddr_set_to_zero
5855 && IS_CONTAINED_BY_VMA (output_section, segment)))
5857 if (first_matching_lma || output_section->lma < matching_lma)
5859 matching_lma = output_section->lma;
5860 first_matching_lma = FALSE;
5863 /* We assume that if the section fits within the segment
5864 then it does not overlap any other section within that
5866 map->sections[isec++] = output_section;
5868 else if (first_suggested_lma)
5870 suggested_lma = output_section->lma;
5871 first_suggested_lma = FALSE;
5874 if (j == section_count)
5879 BFD_ASSERT (j == section_count);
5881 /* Step Two: Adjust the physical address of the current segment,
5883 if (isec == section_count)
5885 /* All of the sections fitted within the segment as currently
5886 specified. This is the default case. Add the segment to
5887 the list of built segments and carry on to process the next
5888 program header in the input BFD. */
5889 map->count = section_count;
5890 *pointer_to_map = map;
5891 pointer_to_map = &map->next;
5894 && !bed->want_p_paddr_set_to_zero
5895 && matching_lma != map->p_paddr
5896 && !map->includes_filehdr
5897 && !map->includes_phdrs)
5898 /* There is some padding before the first section in the
5899 segment. So, we must account for that in the output
5901 map->p_vaddr_offset = matching_lma - map->p_paddr;
5908 if (!first_matching_lma)
5910 /* At least one section fits inside the current segment.
5911 Keep it, but modify its physical address to match the
5912 LMA of the first section that fitted. */
5913 map->p_paddr = matching_lma;
5917 /* None of the sections fitted inside the current segment.
5918 Change the current segment's physical address to match
5919 the LMA of the first section. */
5920 map->p_paddr = suggested_lma;
5923 /* Offset the segment physical address from the lma
5924 to allow for space taken up by elf headers. */
5925 if (map->includes_filehdr)
5927 if (map->p_paddr >= iehdr->e_ehsize)
5928 map->p_paddr -= iehdr->e_ehsize;
5931 map->includes_filehdr = FALSE;
5932 map->includes_phdrs = FALSE;
5936 if (map->includes_phdrs)
5938 if (map->p_paddr >= iehdr->e_phnum * iehdr->e_phentsize)
5940 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5942 /* iehdr->e_phnum is just an estimate of the number
5943 of program headers that we will need. Make a note
5944 here of the number we used and the segment we chose
5945 to hold these headers, so that we can adjust the
5946 offset when we know the correct value. */
5947 phdr_adjust_num = iehdr->e_phnum;
5948 phdr_adjust_seg = map;
5951 map->includes_phdrs = FALSE;
5955 /* Step Three: Loop over the sections again, this time assigning
5956 those that fit to the current segment and removing them from the
5957 sections array; but making sure not to leave large gaps. Once all
5958 possible sections have been assigned to the current segment it is
5959 added to the list of built segments and if sections still remain
5960 to be assigned, a new segment is constructed before repeating
5967 first_suggested_lma = TRUE;
5969 /* Fill the current segment with sections that fit. */
5970 for (j = 0; j < section_count; j++)
5972 section = sections[j];
5974 if (section == NULL)
5977 output_section = section->output_section;
5979 BFD_ASSERT (output_section != NULL);
5981 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5982 || IS_COREFILE_NOTE (segment, section))
5984 if (map->count == 0)
5986 /* If the first section in a segment does not start at
5987 the beginning of the segment, then something is
5989 if (output_section->lma
5991 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5992 + (map->includes_phdrs
5993 ? iehdr->e_phnum * iehdr->e_phentsize
6001 prev_sec = map->sections[map->count - 1];
6003 /* If the gap between the end of the previous section
6004 and the start of this section is more than
6005 maxpagesize then we need to start a new segment. */
6006 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
6008 < BFD_ALIGN (output_section->lma, maxpagesize))
6009 || (prev_sec->lma + prev_sec->size
6010 > output_section->lma))
6012 if (first_suggested_lma)
6014 suggested_lma = output_section->lma;
6015 first_suggested_lma = FALSE;
6022 map->sections[map->count++] = output_section;
6025 section->segment_mark = TRUE;
6027 else if (first_suggested_lma)
6029 suggested_lma = output_section->lma;
6030 first_suggested_lma = FALSE;
6034 BFD_ASSERT (map->count > 0);
6036 /* Add the current segment to the list of built segments. */
6037 *pointer_to_map = map;
6038 pointer_to_map = &map->next;
6040 if (isec < section_count)
6042 /* We still have not allocated all of the sections to
6043 segments. Create a new segment here, initialise it
6044 and carry on looping. */
6045 amt = sizeof (struct elf_segment_map);
6046 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
6047 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
6054 /* Initialise the fields of the segment map. Set the physical
6055 physical address to the LMA of the first section that has
6056 not yet been assigned. */
6058 map->p_type = segment->p_type;
6059 map->p_flags = segment->p_flags;
6060 map->p_flags_valid = 1;
6061 map->p_paddr = suggested_lma;
6062 map->p_paddr_valid = p_paddr_valid;
6063 map->includes_filehdr = 0;
6064 map->includes_phdrs = 0;
6067 while (isec < section_count);
6072 elf_tdata (obfd)->segment_map = map_first;
6074 /* If we had to estimate the number of program headers that were
6075 going to be needed, then check our estimate now and adjust
6076 the offset if necessary. */
6077 if (phdr_adjust_seg != NULL)
6081 for (count = 0, map = map_first; map != NULL; map = map->next)
6084 if (count > phdr_adjust_num)
6085 phdr_adjust_seg->p_paddr
6086 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
6091 #undef IS_CONTAINED_BY_VMA
6092 #undef IS_CONTAINED_BY_LMA
6094 #undef IS_COREFILE_NOTE
6095 #undef IS_SOLARIS_PT_INTERP
6096 #undef IS_SECTION_IN_INPUT_SEGMENT
6097 #undef INCLUDE_SECTION_IN_SEGMENT
6098 #undef SEGMENT_AFTER_SEGMENT
6099 #undef SEGMENT_OVERLAPS
6103 /* Copy ELF program header information. */
6106 copy_elf_program_header (bfd *ibfd, bfd *obfd)
6108 Elf_Internal_Ehdr *iehdr;
6109 struct elf_segment_map *map;
6110 struct elf_segment_map *map_first;
6111 struct elf_segment_map **pointer_to_map;
6112 Elf_Internal_Phdr *segment;
6114 unsigned int num_segments;
6115 bfd_boolean phdr_included = FALSE;
6116 bfd_boolean p_paddr_valid;
6118 iehdr = elf_elfheader (ibfd);
6121 pointer_to_map = &map_first;
6123 /* If all the segment p_paddr fields are zero, don't set
6124 map->p_paddr_valid. */
6125 p_paddr_valid = FALSE;
6126 num_segments = elf_elfheader (ibfd)->e_phnum;
6127 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6130 if (segment->p_paddr != 0)
6132 p_paddr_valid = TRUE;
6136 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6141 unsigned int section_count;
6143 Elf_Internal_Shdr *this_hdr;
6144 asection *first_section = NULL;
6145 asection *lowest_section;
6147 /* Compute how many sections are in this segment. */
6148 for (section = ibfd->sections, section_count = 0;
6150 section = section->next)
6152 this_hdr = &(elf_section_data(section)->this_hdr);
6153 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
6155 if (first_section == NULL)
6156 first_section = section;
6161 /* Allocate a segment map big enough to contain
6162 all of the sections we have selected. */
6163 amt = sizeof (struct elf_segment_map);
6164 if (section_count != 0)
6165 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
6166 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
6170 /* Initialize the fields of the output segment map with the
6173 map->p_type = segment->p_type;
6174 map->p_flags = segment->p_flags;
6175 map->p_flags_valid = 1;
6176 map->p_paddr = segment->p_paddr;
6177 map->p_paddr_valid = p_paddr_valid;
6178 map->p_align = segment->p_align;
6179 map->p_align_valid = 1;
6180 map->p_vaddr_offset = 0;
6182 if (map->p_type == PT_GNU_RELRO
6183 || map->p_type == PT_GNU_STACK)
6185 /* The PT_GNU_RELRO segment may contain the first a few
6186 bytes in the .got.plt section even if the whole .got.plt
6187 section isn't in the PT_GNU_RELRO segment. We won't
6188 change the size of the PT_GNU_RELRO segment.
6189 Similarly, PT_GNU_STACK size is significant on uclinux
6191 map->p_size = segment->p_memsz;
6192 map->p_size_valid = 1;
6195 /* Determine if this segment contains the ELF file header
6196 and if it contains the program headers themselves. */
6197 map->includes_filehdr = (segment->p_offset == 0
6198 && segment->p_filesz >= iehdr->e_ehsize);
6200 map->includes_phdrs = 0;
6201 if (! phdr_included || segment->p_type != PT_LOAD)
6203 map->includes_phdrs =
6204 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
6205 && (segment->p_offset + segment->p_filesz
6206 >= ((bfd_vma) iehdr->e_phoff
6207 + iehdr->e_phnum * iehdr->e_phentsize)));
6209 if (segment->p_type == PT_LOAD && map->includes_phdrs)
6210 phdr_included = TRUE;
6213 lowest_section = first_section;
6214 if (section_count != 0)
6216 unsigned int isec = 0;
6218 for (section = first_section;
6220 section = section->next)
6222 this_hdr = &(elf_section_data(section)->this_hdr);
6223 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
6225 map->sections[isec++] = section->output_section;
6226 if (section->lma < lowest_section->lma)
6227 lowest_section = section;
6228 if ((section->flags & SEC_ALLOC) != 0)
6232 /* Section lmas are set up from PT_LOAD header
6233 p_paddr in _bfd_elf_make_section_from_shdr.
6234 If this header has a p_paddr that disagrees
6235 with the section lma, flag the p_paddr as
6237 if ((section->flags & SEC_LOAD) != 0)
6238 seg_off = this_hdr->sh_offset - segment->p_offset;
6240 seg_off = this_hdr->sh_addr - segment->p_vaddr;
6241 if (section->lma - segment->p_paddr != seg_off)
6242 map->p_paddr_valid = FALSE;
6244 if (isec == section_count)
6250 if (map->includes_filehdr && lowest_section != NULL)
6251 /* We need to keep the space used by the headers fixed. */
6252 map->header_size = lowest_section->vma - segment->p_vaddr;
6254 if (!map->includes_phdrs
6255 && !map->includes_filehdr
6256 && map->p_paddr_valid)
6257 /* There is some other padding before the first section. */
6258 map->p_vaddr_offset = ((lowest_section ? lowest_section->lma : 0)
6259 - segment->p_paddr);
6261 map->count = section_count;
6262 *pointer_to_map = map;
6263 pointer_to_map = &map->next;
6266 elf_tdata (obfd)->segment_map = map_first;
6270 /* Copy private BFD data. This copies or rewrites ELF program header
6274 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
6276 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6277 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6280 if (elf_tdata (ibfd)->phdr == NULL)
6283 if (ibfd->xvec == obfd->xvec)
6285 /* Check to see if any sections in the input BFD
6286 covered by ELF program header have changed. */
6287 Elf_Internal_Phdr *segment;
6288 asection *section, *osec;
6289 unsigned int i, num_segments;
6290 Elf_Internal_Shdr *this_hdr;
6291 const struct elf_backend_data *bed;
6293 bed = get_elf_backend_data (ibfd);
6295 /* Regenerate the segment map if p_paddr is set to 0. */
6296 if (bed->want_p_paddr_set_to_zero)
6299 /* Initialize the segment mark field. */
6300 for (section = obfd->sections; section != NULL;
6301 section = section->next)
6302 section->segment_mark = FALSE;
6304 num_segments = elf_elfheader (ibfd)->e_phnum;
6305 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6309 /* PR binutils/3535. The Solaris linker always sets the p_paddr
6310 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
6311 which severly confuses things, so always regenerate the segment
6312 map in this case. */
6313 if (segment->p_paddr == 0
6314 && segment->p_memsz == 0
6315 && (segment->p_type == PT_INTERP || segment->p_type == PT_DYNAMIC))
6318 for (section = ibfd->sections;
6319 section != NULL; section = section->next)
6321 /* We mark the output section so that we know it comes
6322 from the input BFD. */
6323 osec = section->output_section;
6325 osec->segment_mark = TRUE;
6327 /* Check if this section is covered by the segment. */
6328 this_hdr = &(elf_section_data(section)->this_hdr);
6329 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
6331 /* FIXME: Check if its output section is changed or
6332 removed. What else do we need to check? */
6334 || section->flags != osec->flags
6335 || section->lma != osec->lma
6336 || section->vma != osec->vma
6337 || section->size != osec->size
6338 || section->rawsize != osec->rawsize
6339 || section->alignment_power != osec->alignment_power)
6345 /* Check to see if any output section do not come from the
6347 for (section = obfd->sections; section != NULL;
6348 section = section->next)
6350 if (section->segment_mark == FALSE)
6353 section->segment_mark = FALSE;
6356 return copy_elf_program_header (ibfd, obfd);
6360 if (ibfd->xvec == obfd->xvec)
6362 /* When rewriting program header, set the output maxpagesize to
6363 the maximum alignment of input PT_LOAD segments. */
6364 Elf_Internal_Phdr *segment;
6366 unsigned int num_segments = elf_elfheader (ibfd)->e_phnum;
6367 bfd_vma maxpagesize = 0;
6369 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6372 if (segment->p_type == PT_LOAD
6373 && maxpagesize < segment->p_align)
6374 maxpagesize = segment->p_align;
6376 if (maxpagesize != get_elf_backend_data (obfd)->maxpagesize)
6377 bfd_emul_set_maxpagesize (bfd_get_target (obfd), maxpagesize);
6380 return rewrite_elf_program_header (ibfd, obfd);
6383 /* Initialize private output section information from input section. */
6386 _bfd_elf_init_private_section_data (bfd *ibfd,
6390 struct bfd_link_info *link_info)
6393 Elf_Internal_Shdr *ihdr, *ohdr;
6394 bfd_boolean final_link = link_info != NULL && !link_info->relocatable;
6396 if (ibfd->xvec->flavour != bfd_target_elf_flavour
6397 || obfd->xvec->flavour != bfd_target_elf_flavour)
6400 BFD_ASSERT (elf_section_data (osec) != NULL);
6402 /* For objcopy and relocatable link, don't copy the output ELF
6403 section type from input if the output BFD section flags have been
6404 set to something different. For a final link allow some flags
6405 that the linker clears to differ. */
6406 if (elf_section_type (osec) == SHT_NULL
6407 && (osec->flags == isec->flags
6409 && ((osec->flags ^ isec->flags)
6410 & ~(SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_RELOC)) == 0)))
6411 elf_section_type (osec) = elf_section_type (isec);
6413 /* FIXME: Is this correct for all OS/PROC specific flags? */
6414 elf_section_flags (osec) |= (elf_section_flags (isec)
6415 & (SHF_MASKOS | SHF_MASKPROC));
6417 /* Set things up for objcopy and relocatable link. The output
6418 SHT_GROUP section will have its elf_next_in_group pointing back
6419 to the input group members. Ignore linker created group section.
6420 See elfNN_ia64_object_p in elfxx-ia64.c. */
6423 if (elf_sec_group (isec) == NULL
6424 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)
6426 if (elf_section_flags (isec) & SHF_GROUP)
6427 elf_section_flags (osec) |= SHF_GROUP;
6428 elf_next_in_group (osec) = elf_next_in_group (isec);
6429 elf_section_data (osec)->group = elf_section_data (isec)->group;
6433 ihdr = &elf_section_data (isec)->this_hdr;
6435 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
6436 don't use the output section of the linked-to section since it
6437 may be NULL at this point. */
6438 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
6440 ohdr = &elf_section_data (osec)->this_hdr;
6441 ohdr->sh_flags |= SHF_LINK_ORDER;
6442 elf_linked_to_section (osec) = elf_linked_to_section (isec);
6445 osec->use_rela_p = isec->use_rela_p;
6450 /* Copy private section information. This copies over the entsize
6451 field, and sometimes the info field. */
6454 _bfd_elf_copy_private_section_data (bfd *ibfd,
6459 Elf_Internal_Shdr *ihdr, *ohdr;
6461 if (ibfd->xvec->flavour != bfd_target_elf_flavour
6462 || obfd->xvec->flavour != bfd_target_elf_flavour)
6465 ihdr = &elf_section_data (isec)->this_hdr;
6466 ohdr = &elf_section_data (osec)->this_hdr;
6468 ohdr->sh_entsize = ihdr->sh_entsize;
6470 if (ihdr->sh_type == SHT_SYMTAB
6471 || ihdr->sh_type == SHT_DYNSYM
6472 || ihdr->sh_type == SHT_GNU_verneed
6473 || ihdr->sh_type == SHT_GNU_verdef)
6474 ohdr->sh_info = ihdr->sh_info;
6476 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
6480 /* Look at all the SHT_GROUP sections in IBFD, making any adjustments
6481 necessary if we are removing either the SHT_GROUP section or any of
6482 the group member sections. DISCARDED is the value that a section's
6483 output_section has if the section will be discarded, NULL when this
6484 function is called from objcopy, bfd_abs_section_ptr when called
6488 _bfd_elf_fixup_group_sections (bfd *ibfd, asection *discarded)
6492 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
6493 if (elf_section_type (isec) == SHT_GROUP)
6495 asection *first = elf_next_in_group (isec);
6496 asection *s = first;
6497 bfd_size_type removed = 0;
6501 /* If this member section is being output but the
6502 SHT_GROUP section is not, then clear the group info
6503 set up by _bfd_elf_copy_private_section_data. */
6504 if (s->output_section != discarded
6505 && isec->output_section == discarded)
6507 elf_section_flags (s->output_section) &= ~SHF_GROUP;
6508 elf_group_name (s->output_section) = NULL;
6510 /* Conversely, if the member section is not being output
6511 but the SHT_GROUP section is, then adjust its size. */
6512 else if (s->output_section == discarded
6513 && isec->output_section != discarded)
6515 s = elf_next_in_group (s);
6521 if (discarded != NULL)
6523 /* If we've been called for ld -r, then we need to
6524 adjust the input section size. This function may
6525 be called multiple times, so save the original
6527 if (isec->rawsize == 0)
6528 isec->rawsize = isec->size;
6529 isec->size = isec->rawsize - removed;
6533 /* Adjust the output section size when called from
6535 isec->output_section->size -= removed;
6543 /* Copy private header information. */
6546 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
6548 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6549 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6552 /* Copy over private BFD data if it has not already been copied.
6553 This must be done here, rather than in the copy_private_bfd_data
6554 entry point, because the latter is called after the section
6555 contents have been set, which means that the program headers have
6556 already been worked out. */
6557 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
6559 if (! copy_private_bfd_data (ibfd, obfd))
6563 return _bfd_elf_fixup_group_sections (ibfd, NULL);
6566 /* Copy private symbol information. If this symbol is in a section
6567 which we did not map into a BFD section, try to map the section
6568 index correctly. We use special macro definitions for the mapped
6569 section indices; these definitions are interpreted by the
6570 swap_out_syms function. */
6572 #define MAP_ONESYMTAB (SHN_HIOS + 1)
6573 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
6574 #define MAP_STRTAB (SHN_HIOS + 3)
6575 #define MAP_SHSTRTAB (SHN_HIOS + 4)
6576 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
6579 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
6584 elf_symbol_type *isym, *osym;
6586 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6587 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6590 isym = elf_symbol_from (ibfd, isymarg);
6591 osym = elf_symbol_from (obfd, osymarg);
6594 && isym->internal_elf_sym.st_shndx != 0
6596 && bfd_is_abs_section (isym->symbol.section))
6600 shndx = isym->internal_elf_sym.st_shndx;
6601 if (shndx == elf_onesymtab (ibfd))
6602 shndx = MAP_ONESYMTAB;
6603 else if (shndx == elf_dynsymtab (ibfd))
6604 shndx = MAP_DYNSYMTAB;
6605 else if (shndx == elf_tdata (ibfd)->strtab_section)
6607 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
6608 shndx = MAP_SHSTRTAB;
6609 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
6610 shndx = MAP_SYM_SHNDX;
6611 osym->internal_elf_sym.st_shndx = shndx;
6617 /* Swap out the symbols. */
6620 swap_out_syms (bfd *abfd,
6621 struct bfd_strtab_hash **sttp,
6624 const struct elf_backend_data *bed;
6627 struct bfd_strtab_hash *stt;
6628 Elf_Internal_Shdr *symtab_hdr;
6629 Elf_Internal_Shdr *symtab_shndx_hdr;
6630 Elf_Internal_Shdr *symstrtab_hdr;
6631 bfd_byte *outbound_syms;
6632 bfd_byte *outbound_shndx;
6635 bfd_boolean name_local_sections;
6637 if (!elf_map_symbols (abfd))
6640 /* Dump out the symtabs. */
6641 stt = _bfd_elf_stringtab_init ();
6645 bed = get_elf_backend_data (abfd);
6646 symcount = bfd_get_symcount (abfd);
6647 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
6648 symtab_hdr->sh_type = SHT_SYMTAB;
6649 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
6650 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
6651 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
6652 symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
6654 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
6655 symstrtab_hdr->sh_type = SHT_STRTAB;
6657 outbound_syms = (bfd_byte *) bfd_alloc2 (abfd, 1 + symcount,
6658 bed->s->sizeof_sym);
6659 if (outbound_syms == NULL)
6661 _bfd_stringtab_free (stt);
6664 symtab_hdr->contents = outbound_syms;
6666 outbound_shndx = NULL;
6667 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
6668 if (symtab_shndx_hdr->sh_name != 0)
6670 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
6671 outbound_shndx = (bfd_byte *)
6672 bfd_zalloc2 (abfd, 1 + symcount, sizeof (Elf_External_Sym_Shndx));
6673 if (outbound_shndx == NULL)
6675 _bfd_stringtab_free (stt);
6679 symtab_shndx_hdr->contents = outbound_shndx;
6680 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
6681 symtab_shndx_hdr->sh_size = amt;
6682 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
6683 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
6686 /* Now generate the data (for "contents"). */
6688 /* Fill in zeroth symbol and swap it out. */
6689 Elf_Internal_Sym sym;
6695 sym.st_shndx = SHN_UNDEF;
6696 sym.st_target_internal = 0;
6697 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6698 outbound_syms += bed->s->sizeof_sym;
6699 if (outbound_shndx != NULL)
6700 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6704 = (bed->elf_backend_name_local_section_symbols
6705 && bed->elf_backend_name_local_section_symbols (abfd));
6707 syms = bfd_get_outsymbols (abfd);
6708 for (idx = 0; idx < symcount; idx++)
6710 Elf_Internal_Sym sym;
6711 bfd_vma value = syms[idx]->value;
6712 elf_symbol_type *type_ptr;
6713 flagword flags = syms[idx]->flags;
6716 if (!name_local_sections
6717 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
6719 /* Local section symbols have no name. */
6724 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
6727 if (sym.st_name == (unsigned long) -1)
6729 _bfd_stringtab_free (stt);
6734 type_ptr = elf_symbol_from (abfd, syms[idx]);
6736 if ((flags & BSF_SECTION_SYM) == 0
6737 && bfd_is_com_section (syms[idx]->section))
6739 /* ELF common symbols put the alignment into the `value' field,
6740 and the size into the `size' field. This is backwards from
6741 how BFD handles it, so reverse it here. */
6742 sym.st_size = value;
6743 if (type_ptr == NULL
6744 || type_ptr->internal_elf_sym.st_value == 0)
6745 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
6747 sym.st_value = type_ptr->internal_elf_sym.st_value;
6748 sym.st_shndx = _bfd_elf_section_from_bfd_section
6749 (abfd, syms[idx]->section);
6753 asection *sec = syms[idx]->section;
6756 if (sec->output_section)
6758 value += sec->output_offset;
6759 sec = sec->output_section;
6762 /* Don't add in the section vma for relocatable output. */
6763 if (! relocatable_p)
6765 sym.st_value = value;
6766 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
6768 if (bfd_is_abs_section (sec)
6770 && type_ptr->internal_elf_sym.st_shndx != 0)
6772 /* This symbol is in a real ELF section which we did
6773 not create as a BFD section. Undo the mapping done
6774 by copy_private_symbol_data. */
6775 shndx = type_ptr->internal_elf_sym.st_shndx;
6779 shndx = elf_onesymtab (abfd);
6782 shndx = elf_dynsymtab (abfd);
6785 shndx = elf_tdata (abfd)->strtab_section;
6788 shndx = elf_tdata (abfd)->shstrtab_section;
6791 shndx = elf_tdata (abfd)->symtab_shndx_section;
6800 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
6802 if (shndx == SHN_BAD)
6806 /* Writing this would be a hell of a lot easier if
6807 we had some decent documentation on bfd, and
6808 knew what to expect of the library, and what to
6809 demand of applications. For example, it
6810 appears that `objcopy' might not set the
6811 section of a symbol to be a section that is
6812 actually in the output file. */
6813 sec2 = bfd_get_section_by_name (abfd, sec->name);
6816 _bfd_error_handler (_("\
6817 Unable to find equivalent output section for symbol '%s' from section '%s'"),
6818 syms[idx]->name ? syms[idx]->name : "<Local sym>",
6820 bfd_set_error (bfd_error_invalid_operation);
6821 _bfd_stringtab_free (stt);
6825 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
6826 BFD_ASSERT (shndx != SHN_BAD);
6830 sym.st_shndx = shndx;
6833 if ((flags & BSF_THREAD_LOCAL) != 0)
6835 else if ((flags & BSF_GNU_INDIRECT_FUNCTION) != 0)
6836 type = STT_GNU_IFUNC;
6837 else if ((flags & BSF_FUNCTION) != 0)
6839 else if ((flags & BSF_OBJECT) != 0)
6841 else if ((flags & BSF_RELC) != 0)
6843 else if ((flags & BSF_SRELC) != 0)
6848 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
6851 /* Processor-specific types. */
6852 if (type_ptr != NULL
6853 && bed->elf_backend_get_symbol_type)
6854 type = ((*bed->elf_backend_get_symbol_type)
6855 (&type_ptr->internal_elf_sym, type));
6857 if (flags & BSF_SECTION_SYM)
6859 if (flags & BSF_GLOBAL)
6860 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
6862 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
6864 else if (bfd_is_com_section (syms[idx]->section))
6866 #ifdef USE_STT_COMMON
6867 if (type == STT_OBJECT)
6868 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_COMMON);
6871 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
6873 else if (bfd_is_und_section (syms[idx]->section))
6874 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
6878 else if (flags & BSF_FILE)
6879 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
6882 int bind = STB_LOCAL;
6884 if (flags & BSF_LOCAL)
6886 else if (flags & BSF_GNU_UNIQUE)
6887 bind = STB_GNU_UNIQUE;
6888 else if (flags & BSF_WEAK)
6890 else if (flags & BSF_GLOBAL)
6893 sym.st_info = ELF_ST_INFO (bind, type);
6896 if (type_ptr != NULL)
6898 sym.st_other = type_ptr->internal_elf_sym.st_other;
6899 sym.st_target_internal
6900 = type_ptr->internal_elf_sym.st_target_internal;
6905 sym.st_target_internal = 0;
6908 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6909 outbound_syms += bed->s->sizeof_sym;
6910 if (outbound_shndx != NULL)
6911 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6915 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
6916 symstrtab_hdr->sh_type = SHT_STRTAB;
6918 symstrtab_hdr->sh_flags = 0;
6919 symstrtab_hdr->sh_addr = 0;
6920 symstrtab_hdr->sh_entsize = 0;
6921 symstrtab_hdr->sh_link = 0;
6922 symstrtab_hdr->sh_info = 0;
6923 symstrtab_hdr->sh_addralign = 1;
6928 /* Return the number of bytes required to hold the symtab vector.
6930 Note that we base it on the count plus 1, since we will null terminate
6931 the vector allocated based on this size. However, the ELF symbol table
6932 always has a dummy entry as symbol #0, so it ends up even. */
6935 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
6939 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
6941 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6942 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6944 symtab_size -= sizeof (asymbol *);
6950 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
6954 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
6956 if (elf_dynsymtab (abfd) == 0)
6958 bfd_set_error (bfd_error_invalid_operation);
6962 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6963 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6965 symtab_size -= sizeof (asymbol *);
6971 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
6974 return (asect->reloc_count + 1) * sizeof (arelent *);
6977 /* Canonicalize the relocs. */
6980 _bfd_elf_canonicalize_reloc (bfd *abfd,
6987 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6989 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
6992 tblptr = section->relocation;
6993 for (i = 0; i < section->reloc_count; i++)
6994 *relptr++ = tblptr++;
6998 return section->reloc_count;
7002 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
7004 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7005 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
7008 bfd_get_symcount (abfd) = symcount;
7013 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
7014 asymbol **allocation)
7016 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7017 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
7020 bfd_get_dynamic_symcount (abfd) = symcount;
7024 /* Return the size required for the dynamic reloc entries. Any loadable
7025 section that was actually installed in the BFD, and has type SHT_REL
7026 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
7027 dynamic reloc section. */
7030 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
7035 if (elf_dynsymtab (abfd) == 0)
7037 bfd_set_error (bfd_error_invalid_operation);
7041 ret = sizeof (arelent *);
7042 for (s = abfd->sections; s != NULL; s = s->next)
7043 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
7044 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
7045 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
7046 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
7047 * sizeof (arelent *));
7052 /* Canonicalize the dynamic relocation entries. Note that we return the
7053 dynamic relocations as a single block, although they are actually
7054 associated with particular sections; the interface, which was
7055 designed for SunOS style shared libraries, expects that there is only
7056 one set of dynamic relocs. Any loadable section that was actually
7057 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
7058 dynamic symbol table, is considered to be a dynamic reloc section. */
7061 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
7065 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
7069 if (elf_dynsymtab (abfd) == 0)
7071 bfd_set_error (bfd_error_invalid_operation);
7075 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
7077 for (s = abfd->sections; s != NULL; s = s->next)
7079 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
7080 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
7081 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
7086 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
7088 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
7090 for (i = 0; i < count; i++)
7101 /* Read in the version information. */
7104 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
7106 bfd_byte *contents = NULL;
7107 unsigned int freeidx = 0;
7109 if (elf_dynverref (abfd) != 0)
7111 Elf_Internal_Shdr *hdr;
7112 Elf_External_Verneed *everneed;
7113 Elf_Internal_Verneed *iverneed;
7115 bfd_byte *contents_end;
7117 hdr = &elf_tdata (abfd)->dynverref_hdr;
7119 elf_tdata (abfd)->verref = (Elf_Internal_Verneed *)
7120 bfd_zalloc2 (abfd, hdr->sh_info, sizeof (Elf_Internal_Verneed));
7121 if (elf_tdata (abfd)->verref == NULL)
7124 elf_tdata (abfd)->cverrefs = hdr->sh_info;
7126 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
7127 if (contents == NULL)
7129 error_return_verref:
7130 elf_tdata (abfd)->verref = NULL;
7131 elf_tdata (abfd)->cverrefs = 0;
7134 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
7135 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
7136 goto error_return_verref;
7138 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verneed))
7139 goto error_return_verref;
7141 BFD_ASSERT (sizeof (Elf_External_Verneed)
7142 == sizeof (Elf_External_Vernaux));
7143 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
7144 everneed = (Elf_External_Verneed *) contents;
7145 iverneed = elf_tdata (abfd)->verref;
7146 for (i = 0; i < hdr->sh_info; i++, iverneed++)
7148 Elf_External_Vernaux *evernaux;
7149 Elf_Internal_Vernaux *ivernaux;
7152 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
7154 iverneed->vn_bfd = abfd;
7156 iverneed->vn_filename =
7157 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
7159 if (iverneed->vn_filename == NULL)
7160 goto error_return_verref;
7162 if (iverneed->vn_cnt == 0)
7163 iverneed->vn_auxptr = NULL;
7166 iverneed->vn_auxptr = (struct elf_internal_vernaux *)
7167 bfd_alloc2 (abfd, iverneed->vn_cnt,
7168 sizeof (Elf_Internal_Vernaux));
7169 if (iverneed->vn_auxptr == NULL)
7170 goto error_return_verref;
7173 if (iverneed->vn_aux
7174 > (size_t) (contents_end - (bfd_byte *) everneed))
7175 goto error_return_verref;
7177 evernaux = ((Elf_External_Vernaux *)
7178 ((bfd_byte *) everneed + iverneed->vn_aux));
7179 ivernaux = iverneed->vn_auxptr;
7180 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
7182 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
7184 ivernaux->vna_nodename =
7185 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
7186 ivernaux->vna_name);
7187 if (ivernaux->vna_nodename == NULL)
7188 goto error_return_verref;
7190 if (j + 1 < iverneed->vn_cnt)
7191 ivernaux->vna_nextptr = ivernaux + 1;
7193 ivernaux->vna_nextptr = NULL;
7195 if (ivernaux->vna_next
7196 > (size_t) (contents_end - (bfd_byte *) evernaux))
7197 goto error_return_verref;
7199 evernaux = ((Elf_External_Vernaux *)
7200 ((bfd_byte *) evernaux + ivernaux->vna_next));
7202 if (ivernaux->vna_other > freeidx)
7203 freeidx = ivernaux->vna_other;
7206 if (i + 1 < hdr->sh_info)
7207 iverneed->vn_nextref = iverneed + 1;
7209 iverneed->vn_nextref = NULL;
7211 if (iverneed->vn_next
7212 > (size_t) (contents_end - (bfd_byte *) everneed))
7213 goto error_return_verref;
7215 everneed = ((Elf_External_Verneed *)
7216 ((bfd_byte *) everneed + iverneed->vn_next));
7223 if (elf_dynverdef (abfd) != 0)
7225 Elf_Internal_Shdr *hdr;
7226 Elf_External_Verdef *everdef;
7227 Elf_Internal_Verdef *iverdef;
7228 Elf_Internal_Verdef *iverdefarr;
7229 Elf_Internal_Verdef iverdefmem;
7231 unsigned int maxidx;
7232 bfd_byte *contents_end_def, *contents_end_aux;
7234 hdr = &elf_tdata (abfd)->dynverdef_hdr;
7236 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
7237 if (contents == NULL)
7239 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
7240 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
7243 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verdef))
7246 BFD_ASSERT (sizeof (Elf_External_Verdef)
7247 >= sizeof (Elf_External_Verdaux));
7248 contents_end_def = contents + hdr->sh_size
7249 - sizeof (Elf_External_Verdef);
7250 contents_end_aux = contents + hdr->sh_size
7251 - sizeof (Elf_External_Verdaux);
7253 /* We know the number of entries in the section but not the maximum
7254 index. Therefore we have to run through all entries and find
7256 everdef = (Elf_External_Verdef *) contents;
7258 for (i = 0; i < hdr->sh_info; ++i)
7260 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
7262 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
7263 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
7265 if (iverdefmem.vd_next
7266 > (size_t) (contents_end_def - (bfd_byte *) everdef))
7269 everdef = ((Elf_External_Verdef *)
7270 ((bfd_byte *) everdef + iverdefmem.vd_next));
7273 if (default_imported_symver)
7275 if (freeidx > maxidx)
7280 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
7281 bfd_zalloc2 (abfd, maxidx, sizeof (Elf_Internal_Verdef));
7282 if (elf_tdata (abfd)->verdef == NULL)
7285 elf_tdata (abfd)->cverdefs = maxidx;
7287 everdef = (Elf_External_Verdef *) contents;
7288 iverdefarr = elf_tdata (abfd)->verdef;
7289 for (i = 0; i < hdr->sh_info; i++)
7291 Elf_External_Verdaux *everdaux;
7292 Elf_Internal_Verdaux *iverdaux;
7295 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
7297 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
7299 error_return_verdef:
7300 elf_tdata (abfd)->verdef = NULL;
7301 elf_tdata (abfd)->cverdefs = 0;
7305 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
7306 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
7308 iverdef->vd_bfd = abfd;
7310 if (iverdef->vd_cnt == 0)
7311 iverdef->vd_auxptr = NULL;
7314 iverdef->vd_auxptr = (struct elf_internal_verdaux *)
7315 bfd_alloc2 (abfd, iverdef->vd_cnt,
7316 sizeof (Elf_Internal_Verdaux));
7317 if (iverdef->vd_auxptr == NULL)
7318 goto error_return_verdef;
7322 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
7323 goto error_return_verdef;
7325 everdaux = ((Elf_External_Verdaux *)
7326 ((bfd_byte *) everdef + iverdef->vd_aux));
7327 iverdaux = iverdef->vd_auxptr;
7328 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
7330 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
7332 iverdaux->vda_nodename =
7333 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
7334 iverdaux->vda_name);
7335 if (iverdaux->vda_nodename == NULL)
7336 goto error_return_verdef;
7338 if (j + 1 < iverdef->vd_cnt)
7339 iverdaux->vda_nextptr = iverdaux + 1;
7341 iverdaux->vda_nextptr = NULL;
7343 if (iverdaux->vda_next
7344 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
7345 goto error_return_verdef;
7347 everdaux = ((Elf_External_Verdaux *)
7348 ((bfd_byte *) everdaux + iverdaux->vda_next));
7351 if (iverdef->vd_cnt)
7352 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
7354 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
7355 iverdef->vd_nextdef = iverdef + 1;
7357 iverdef->vd_nextdef = NULL;
7359 everdef = ((Elf_External_Verdef *)
7360 ((bfd_byte *) everdef + iverdef->vd_next));
7366 else if (default_imported_symver)
7373 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
7374 bfd_zalloc2 (abfd, freeidx, sizeof (Elf_Internal_Verdef));
7375 if (elf_tdata (abfd)->verdef == NULL)
7378 elf_tdata (abfd)->cverdefs = freeidx;
7381 /* Create a default version based on the soname. */
7382 if (default_imported_symver)
7384 Elf_Internal_Verdef *iverdef;
7385 Elf_Internal_Verdaux *iverdaux;
7387 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];
7389 iverdef->vd_version = VER_DEF_CURRENT;
7390 iverdef->vd_flags = 0;
7391 iverdef->vd_ndx = freeidx;
7392 iverdef->vd_cnt = 1;
7394 iverdef->vd_bfd = abfd;
7396 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
7397 if (iverdef->vd_nodename == NULL)
7398 goto error_return_verdef;
7399 iverdef->vd_nextdef = NULL;
7400 iverdef->vd_auxptr = (struct elf_internal_verdaux *)
7401 bfd_alloc (abfd, sizeof (Elf_Internal_Verdaux));
7402 if (iverdef->vd_auxptr == NULL)
7403 goto error_return_verdef;
7405 iverdaux = iverdef->vd_auxptr;
7406 iverdaux->vda_nodename = iverdef->vd_nodename;
7407 iverdaux->vda_nextptr = NULL;
7413 if (contents != NULL)
7419 _bfd_elf_make_empty_symbol (bfd *abfd)
7421 elf_symbol_type *newsym;
7422 bfd_size_type amt = sizeof (elf_symbol_type);
7424 newsym = (elf_symbol_type *) bfd_zalloc (abfd, amt);
7429 newsym->symbol.the_bfd = abfd;
7430 return &newsym->symbol;
7435 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
7439 bfd_symbol_info (symbol, ret);
7442 /* Return whether a symbol name implies a local symbol. Most targets
7443 use this function for the is_local_label_name entry point, but some
7447 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
7450 /* Normal local symbols start with ``.L''. */
7451 if (name[0] == '.' && name[1] == 'L')
7454 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
7455 DWARF debugging symbols starting with ``..''. */
7456 if (name[0] == '.' && name[1] == '.')
7459 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
7460 emitting DWARF debugging output. I suspect this is actually a
7461 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
7462 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
7463 underscore to be emitted on some ELF targets). For ease of use,
7464 we treat such symbols as local. */
7465 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
7472 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
7473 asymbol *symbol ATTRIBUTE_UNUSED)
7480 _bfd_elf_set_arch_mach (bfd *abfd,
7481 enum bfd_architecture arch,
7482 unsigned long machine)
7484 /* If this isn't the right architecture for this backend, and this
7485 isn't the generic backend, fail. */
7486 if (arch != get_elf_backend_data (abfd)->arch
7487 && arch != bfd_arch_unknown
7488 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
7491 return bfd_default_set_arch_mach (abfd, arch, machine);
7494 /* Find the function to a particular section and offset,
7495 for error reporting. */
7498 elf_find_function (bfd *abfd,
7502 const char **filename_ptr,
7503 const char **functionname_ptr)
7505 static asection *last_section;
7506 static asymbol *func;
7507 static const char *filename;
7508 static bfd_size_type func_size;
7510 if (symbols == NULL)
7513 if (last_section != section
7515 || offset < func->value
7516 || offset >= func->value + func_size)
7521 /* ??? Given multiple file symbols, it is impossible to reliably
7522 choose the right file name for global symbols. File symbols are
7523 local symbols, and thus all file symbols must sort before any
7524 global symbols. The ELF spec may be interpreted to say that a
7525 file symbol must sort before other local symbols, but currently
7526 ld -r doesn't do this. So, for ld -r output, it is possible to
7527 make a better choice of file name for local symbols by ignoring
7528 file symbols appearing after a given local symbol. */
7529 enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
7530 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7536 state = nothing_seen;
7538 last_section = section;
7540 for (p = symbols; *p != NULL; p++)
7546 if ((sym->flags & BSF_FILE) != 0)
7549 if (state == symbol_seen)
7550 state = file_after_symbol_seen;
7554 size = bed->maybe_function_sym (sym, section, &code_off);
7556 && code_off <= offset
7557 && (code_off > low_func
7558 || (code_off == low_func
7559 && size > func_size)))
7563 low_func = code_off;
7566 && ((sym->flags & BSF_LOCAL) != 0
7567 || state != file_after_symbol_seen))
7568 filename = bfd_asymbol_name (file);
7570 if (state == nothing_seen)
7571 state = symbol_seen;
7579 *filename_ptr = filename;
7580 if (functionname_ptr)
7581 *functionname_ptr = bfd_asymbol_name (func);
7586 /* Find the nearest line to a particular section and offset,
7587 for error reporting. */
7590 _bfd_elf_find_nearest_line (bfd *abfd,
7594 const char **filename_ptr,
7595 const char **functionname_ptr,
7596 unsigned int *line_ptr)
7598 return _bfd_elf_find_nearest_line_discriminator (abfd, section, symbols,
7599 offset, filename_ptr,
7606 _bfd_elf_find_nearest_line_discriminator (bfd *abfd,
7610 const char **filename_ptr,
7611 const char **functionname_ptr,
7612 unsigned int *line_ptr,
7613 unsigned int *discriminator_ptr)
7617 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
7618 filename_ptr, functionname_ptr,
7621 if (!*functionname_ptr)
7622 elf_find_function (abfd, section, symbols, offset,
7623 *filename_ptr ? NULL : filename_ptr,
7629 if (_bfd_dwarf2_find_nearest_line (abfd, dwarf_debug_sections,
7630 section, symbols, offset,
7631 filename_ptr, functionname_ptr,
7632 line_ptr, discriminator_ptr, 0,
7633 &elf_tdata (abfd)->dwarf2_find_line_info))
7635 if (!*functionname_ptr)
7636 elf_find_function (abfd, section, symbols, offset,
7637 *filename_ptr ? NULL : filename_ptr,
7643 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
7644 &found, filename_ptr,
7645 functionname_ptr, line_ptr,
7646 &elf_tdata (abfd)->line_info))
7648 if (found && (*functionname_ptr || *line_ptr))
7651 if (symbols == NULL)
7654 if (! elf_find_function (abfd, section, symbols, offset,
7655 filename_ptr, functionname_ptr))
7662 /* Find the line for a symbol. */
7665 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
7666 const char **filename_ptr, unsigned int *line_ptr)
7668 return _bfd_elf_find_line_discriminator (abfd, symbols, symbol,
7669 filename_ptr, line_ptr,
7674 _bfd_elf_find_line_discriminator (bfd *abfd, asymbol **symbols, asymbol *symbol,
7675 const char **filename_ptr,
7676 unsigned int *line_ptr,
7677 unsigned int *discriminator_ptr)
7679 return _bfd_dwarf2_find_line (abfd, symbols, symbol,
7680 filename_ptr, line_ptr, discriminator_ptr, 0,
7681 &elf_tdata (abfd)->dwarf2_find_line_info);
7684 /* After a call to bfd_find_nearest_line, successive calls to
7685 bfd_find_inliner_info can be used to get source information about
7686 each level of function inlining that terminated at the address
7687 passed to bfd_find_nearest_line. Currently this is only supported
7688 for DWARF2 with appropriate DWARF3 extensions. */
7691 _bfd_elf_find_inliner_info (bfd *abfd,
7692 const char **filename_ptr,
7693 const char **functionname_ptr,
7694 unsigned int *line_ptr)
7697 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
7698 functionname_ptr, line_ptr,
7699 & elf_tdata (abfd)->dwarf2_find_line_info);
7704 _bfd_elf_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
7706 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7707 int ret = bed->s->sizeof_ehdr;
7709 if (!info->relocatable)
7711 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
7713 if (phdr_size == (bfd_size_type) -1)
7715 struct elf_segment_map *m;
7718 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
7719 phdr_size += bed->s->sizeof_phdr;
7722 phdr_size = get_program_header_size (abfd, info);
7725 elf_tdata (abfd)->program_header_size = phdr_size;
7733 _bfd_elf_set_section_contents (bfd *abfd,
7735 const void *location,
7737 bfd_size_type count)
7739 Elf_Internal_Shdr *hdr;
7742 if (! abfd->output_has_begun
7743 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
7746 hdr = &elf_section_data (section)->this_hdr;
7747 pos = hdr->sh_offset + offset;
7748 if (bfd_seek (abfd, pos, SEEK_SET) != 0
7749 || bfd_bwrite (location, count, abfd) != count)
7756 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
7757 arelent *cache_ptr ATTRIBUTE_UNUSED,
7758 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
7763 /* Try to convert a non-ELF reloc into an ELF one. */
7766 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
7768 /* Check whether we really have an ELF howto. */
7770 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
7772 bfd_reloc_code_real_type code;
7773 reloc_howto_type *howto;
7775 /* Alien reloc: Try to determine its type to replace it with an
7776 equivalent ELF reloc. */
7778 if (areloc->howto->pc_relative)
7780 switch (areloc->howto->bitsize)
7783 code = BFD_RELOC_8_PCREL;
7786 code = BFD_RELOC_12_PCREL;
7789 code = BFD_RELOC_16_PCREL;
7792 code = BFD_RELOC_24_PCREL;
7795 code = BFD_RELOC_32_PCREL;
7798 code = BFD_RELOC_64_PCREL;
7804 howto = bfd_reloc_type_lookup (abfd, code);
7806 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
7808 if (howto->pcrel_offset)
7809 areloc->addend += areloc->address;
7811 areloc->addend -= areloc->address; /* addend is unsigned!! */
7816 switch (areloc->howto->bitsize)
7822 code = BFD_RELOC_14;
7825 code = BFD_RELOC_16;
7828 code = BFD_RELOC_26;
7831 code = BFD_RELOC_32;
7834 code = BFD_RELOC_64;
7840 howto = bfd_reloc_type_lookup (abfd, code);
7844 areloc->howto = howto;
7852 (*_bfd_error_handler)
7853 (_("%B: unsupported relocation type %s"),
7854 abfd, areloc->howto->name);
7855 bfd_set_error (bfd_error_bad_value);
7860 _bfd_elf_close_and_cleanup (bfd *abfd)
7862 struct elf_obj_tdata *tdata = elf_tdata (abfd);
7863 if (bfd_get_format (abfd) == bfd_object && tdata != NULL)
7865 if (elf_shstrtab (abfd) != NULL)
7866 _bfd_elf_strtab_free (elf_shstrtab (abfd));
7867 _bfd_dwarf2_cleanup_debug_info (abfd, &tdata->dwarf2_find_line_info);
7870 return _bfd_generic_close_and_cleanup (abfd);
7873 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
7874 in the relocation's offset. Thus we cannot allow any sort of sanity
7875 range-checking to interfere. There is nothing else to do in processing
7878 bfd_reloc_status_type
7879 _bfd_elf_rel_vtable_reloc_fn
7880 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
7881 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
7882 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
7883 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
7885 return bfd_reloc_ok;
7888 /* Elf core file support. Much of this only works on native
7889 toolchains, since we rely on knowing the
7890 machine-dependent procfs structure in order to pick
7891 out details about the corefile. */
7893 #ifdef HAVE_SYS_PROCFS_H
7894 /* Needed for new procfs interface on sparc-solaris. */
7895 # define _STRUCTURED_PROC 1
7896 # include <sys/procfs.h>
7899 /* Return a PID that identifies a "thread" for threaded cores, or the
7900 PID of the main process for non-threaded cores. */
7903 elfcore_make_pid (bfd *abfd)
7907 pid = elf_tdata (abfd)->core_lwpid;
7909 pid = elf_tdata (abfd)->core_pid;
7914 /* If there isn't a section called NAME, make one, using
7915 data from SECT. Note, this function will generate a
7916 reference to NAME, so you shouldn't deallocate or
7920 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
7924 if (bfd_get_section_by_name (abfd, name) != NULL)
7927 sect2 = bfd_make_section_with_flags (abfd, name, sect->flags);
7931 sect2->size = sect->size;
7932 sect2->filepos = sect->filepos;
7933 sect2->alignment_power = sect->alignment_power;
7937 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
7938 actually creates up to two pseudosections:
7939 - For the single-threaded case, a section named NAME, unless
7940 such a section already exists.
7941 - For the multi-threaded case, a section named "NAME/PID", where
7942 PID is elfcore_make_pid (abfd).
7943 Both pseudosections have identical contents. */
7945 _bfd_elfcore_make_pseudosection (bfd *abfd,
7951 char *threaded_name;
7955 /* Build the section name. */
7957 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
7958 len = strlen (buf) + 1;
7959 threaded_name = (char *) bfd_alloc (abfd, len);
7960 if (threaded_name == NULL)
7962 memcpy (threaded_name, buf, len);
7964 sect = bfd_make_section_anyway_with_flags (abfd, threaded_name,
7969 sect->filepos = filepos;
7970 sect->alignment_power = 2;
7972 return elfcore_maybe_make_sect (abfd, name, sect);
7975 /* prstatus_t exists on:
7977 linux 2.[01] + glibc
7981 #if defined (HAVE_PRSTATUS_T)
7984 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
7989 if (note->descsz == sizeof (prstatus_t))
7993 size = sizeof (prstat.pr_reg);
7994 offset = offsetof (prstatus_t, pr_reg);
7995 memcpy (&prstat, note->descdata, sizeof (prstat));
7997 /* Do not overwrite the core signal if it
7998 has already been set by another thread. */
7999 if (elf_tdata (abfd)->core_signal == 0)
8000 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
8001 if (elf_tdata (abfd)->core_pid == 0)
8002 elf_tdata (abfd)->core_pid = prstat.pr_pid;
8004 /* pr_who exists on:
8007 pr_who doesn't exist on:
8010 #if defined (HAVE_PRSTATUS_T_PR_WHO)
8011 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
8013 elf_tdata (abfd)->core_lwpid = prstat.pr_pid;
8016 #if defined (HAVE_PRSTATUS32_T)
8017 else if (note->descsz == sizeof (prstatus32_t))
8019 /* 64-bit host, 32-bit corefile */
8020 prstatus32_t prstat;
8022 size = sizeof (prstat.pr_reg);
8023 offset = offsetof (prstatus32_t, pr_reg);
8024 memcpy (&prstat, note->descdata, sizeof (prstat));
8026 /* Do not overwrite the core signal if it
8027 has already been set by another thread. */
8028 if (elf_tdata (abfd)->core_signal == 0)
8029 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
8030 if (elf_tdata (abfd)->core_pid == 0)
8031 elf_tdata (abfd)->core_pid = prstat.pr_pid;
8033 /* pr_who exists on:
8036 pr_who doesn't exist on:
8039 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
8040 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
8042 elf_tdata (abfd)->core_lwpid = prstat.pr_pid;
8045 #endif /* HAVE_PRSTATUS32_T */
8048 /* Fail - we don't know how to handle any other
8049 note size (ie. data object type). */
8053 /* Make a ".reg/999" section and a ".reg" section. */
8054 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
8055 size, note->descpos + offset);
8057 #endif /* defined (HAVE_PRSTATUS_T) */
8059 /* Create a pseudosection containing the exact contents of NOTE. */
8061 elfcore_make_note_pseudosection (bfd *abfd,
8063 Elf_Internal_Note *note)
8065 return _bfd_elfcore_make_pseudosection (abfd, name,
8066 note->descsz, note->descpos);
8069 /* There isn't a consistent prfpregset_t across platforms,
8070 but it doesn't matter, because we don't have to pick this
8071 data structure apart. */
8074 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
8076 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8079 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
8080 type of NT_PRXFPREG. Just include the whole note's contents
8084 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
8086 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
8089 /* Linux dumps the Intel XSAVE extended state in a note named "LINUX"
8090 with a note type of NT_X86_XSTATE. Just include the whole note's
8091 contents literally. */
8094 elfcore_grok_xstatereg (bfd *abfd, Elf_Internal_Note *note)
8096 return elfcore_make_note_pseudosection (abfd, ".reg-xstate", note);
8100 elfcore_grok_ppc_vmx (bfd *abfd, Elf_Internal_Note *note)
8102 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vmx", note);
8106 elfcore_grok_ppc_vsx (bfd *abfd, Elf_Internal_Note *note)
8108 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vsx", note);
8112 elfcore_grok_s390_high_gprs (bfd *abfd, Elf_Internal_Note *note)
8114 return elfcore_make_note_pseudosection (abfd, ".reg-s390-high-gprs", note);
8118 elfcore_grok_s390_timer (bfd *abfd, Elf_Internal_Note *note)
8120 return elfcore_make_note_pseudosection (abfd, ".reg-s390-timer", note);
8124 elfcore_grok_s390_todcmp (bfd *abfd, Elf_Internal_Note *note)
8126 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todcmp", note);
8130 elfcore_grok_s390_todpreg (bfd *abfd, Elf_Internal_Note *note)
8132 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todpreg", note);
8136 elfcore_grok_s390_ctrs (bfd *abfd, Elf_Internal_Note *note)
8138 return elfcore_make_note_pseudosection (abfd, ".reg-s390-ctrs", note);
8142 elfcore_grok_s390_prefix (bfd *abfd, Elf_Internal_Note *note)
8144 return elfcore_make_note_pseudosection (abfd, ".reg-s390-prefix", note);
8148 elfcore_grok_s390_last_break (bfd *abfd, Elf_Internal_Note *note)
8150 return elfcore_make_note_pseudosection (abfd, ".reg-s390-last-break", note);
8154 elfcore_grok_s390_system_call (bfd *abfd, Elf_Internal_Note *note)
8156 return elfcore_make_note_pseudosection (abfd, ".reg-s390-system-call", note);
8160 elfcore_grok_arm_vfp (bfd *abfd, Elf_Internal_Note *note)
8162 return elfcore_make_note_pseudosection (abfd, ".reg-arm-vfp", note);
8165 #if defined (HAVE_PRPSINFO_T)
8166 typedef prpsinfo_t elfcore_psinfo_t;
8167 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
8168 typedef prpsinfo32_t elfcore_psinfo32_t;
8172 #if defined (HAVE_PSINFO_T)
8173 typedef psinfo_t elfcore_psinfo_t;
8174 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
8175 typedef psinfo32_t elfcore_psinfo32_t;
8179 /* return a malloc'ed copy of a string at START which is at
8180 most MAX bytes long, possibly without a terminating '\0'.
8181 the copy will always have a terminating '\0'. */
8184 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
8187 char *end = (char *) memchr (start, '\0', max);
8195 dups = (char *) bfd_alloc (abfd, len + 1);
8199 memcpy (dups, start, len);
8205 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8207 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
8209 if (note->descsz == sizeof (elfcore_psinfo_t))
8211 elfcore_psinfo_t psinfo;
8213 memcpy (&psinfo, note->descdata, sizeof (psinfo));
8215 #if defined (HAVE_PSINFO_T_PR_PID) || defined (HAVE_PRPSINFO_T_PR_PID)
8216 elf_tdata (abfd)->core_pid = psinfo.pr_pid;
8218 elf_tdata (abfd)->core_program
8219 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
8220 sizeof (psinfo.pr_fname));
8222 elf_tdata (abfd)->core_command
8223 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
8224 sizeof (psinfo.pr_psargs));
8226 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
8227 else if (note->descsz == sizeof (elfcore_psinfo32_t))
8229 /* 64-bit host, 32-bit corefile */
8230 elfcore_psinfo32_t psinfo;
8232 memcpy (&psinfo, note->descdata, sizeof (psinfo));
8234 #if defined (HAVE_PSINFO32_T_PR_PID) || defined (HAVE_PRPSINFO32_T_PR_PID)
8235 elf_tdata (abfd)->core_pid = psinfo.pr_pid;
8237 elf_tdata (abfd)->core_program
8238 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
8239 sizeof (psinfo.pr_fname));
8241 elf_tdata (abfd)->core_command
8242 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
8243 sizeof (psinfo.pr_psargs));
8249 /* Fail - we don't know how to handle any other
8250 note size (ie. data object type). */
8254 /* Note that for some reason, a spurious space is tacked
8255 onto the end of the args in some (at least one anyway)
8256 implementations, so strip it off if it exists. */
8259 char *command = elf_tdata (abfd)->core_command;
8260 int n = strlen (command);
8262 if (0 < n && command[n - 1] == ' ')
8263 command[n - 1] = '\0';
8268 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
8270 #if defined (HAVE_PSTATUS_T)
8272 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
8274 if (note->descsz == sizeof (pstatus_t)
8275 #if defined (HAVE_PXSTATUS_T)
8276 || note->descsz == sizeof (pxstatus_t)
8282 memcpy (&pstat, note->descdata, sizeof (pstat));
8284 elf_tdata (abfd)->core_pid = pstat.pr_pid;
8286 #if defined (HAVE_PSTATUS32_T)
8287 else if (note->descsz == sizeof (pstatus32_t))
8289 /* 64-bit host, 32-bit corefile */
8292 memcpy (&pstat, note->descdata, sizeof (pstat));
8294 elf_tdata (abfd)->core_pid = pstat.pr_pid;
8297 /* Could grab some more details from the "representative"
8298 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
8299 NT_LWPSTATUS note, presumably. */
8303 #endif /* defined (HAVE_PSTATUS_T) */
8305 #if defined (HAVE_LWPSTATUS_T)
8307 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
8309 lwpstatus_t lwpstat;
8315 if (note->descsz != sizeof (lwpstat)
8316 #if defined (HAVE_LWPXSTATUS_T)
8317 && note->descsz != sizeof (lwpxstatus_t)
8322 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
8324 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
8325 /* Do not overwrite the core signal if it has already been set by
8327 if (elf_tdata (abfd)->core_signal == 0)
8328 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
8330 /* Make a ".reg/999" section. */
8332 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
8333 len = strlen (buf) + 1;
8334 name = bfd_alloc (abfd, len);
8337 memcpy (name, buf, len);
8339 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8343 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8344 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
8345 sect->filepos = note->descpos
8346 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
8349 #if defined (HAVE_LWPSTATUS_T_PR_REG)
8350 sect->size = sizeof (lwpstat.pr_reg);
8351 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
8354 sect->alignment_power = 2;
8356 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
8359 /* Make a ".reg2/999" section */
8361 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
8362 len = strlen (buf) + 1;
8363 name = bfd_alloc (abfd, len);
8366 memcpy (name, buf, len);
8368 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8372 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8373 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
8374 sect->filepos = note->descpos
8375 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
8378 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
8379 sect->size = sizeof (lwpstat.pr_fpreg);
8380 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
8383 sect->alignment_power = 2;
8385 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
8387 #endif /* defined (HAVE_LWPSTATUS_T) */
8390 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
8397 int is_active_thread;
8400 if (note->descsz < 728)
8403 if (! CONST_STRNEQ (note->namedata, "win32"))
8406 type = bfd_get_32 (abfd, note->descdata);
8410 case 1 /* NOTE_INFO_PROCESS */:
8411 /* FIXME: need to add ->core_command. */
8412 /* process_info.pid */
8413 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 8);
8414 /* process_info.signal */
8415 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 12);
8418 case 2 /* NOTE_INFO_THREAD */:
8419 /* Make a ".reg/999" section. */
8420 /* thread_info.tid */
8421 sprintf (buf, ".reg/%ld", (long) bfd_get_32 (abfd, note->descdata + 8));
8423 len = strlen (buf) + 1;
8424 name = (char *) bfd_alloc (abfd, len);
8428 memcpy (name, buf, len);
8430 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8434 /* sizeof (thread_info.thread_context) */
8436 /* offsetof (thread_info.thread_context) */
8437 sect->filepos = note->descpos + 12;
8438 sect->alignment_power = 2;
8440 /* thread_info.is_active_thread */
8441 is_active_thread = bfd_get_32 (abfd, note->descdata + 8);
8443 if (is_active_thread)
8444 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
8448 case 3 /* NOTE_INFO_MODULE */:
8449 /* Make a ".module/xxxxxxxx" section. */
8450 /* module_info.base_address */
8451 base_addr = bfd_get_32 (abfd, note->descdata + 4);
8452 sprintf (buf, ".module/%08lx", (unsigned long) base_addr);
8454 len = strlen (buf) + 1;
8455 name = (char *) bfd_alloc (abfd, len);
8459 memcpy (name, buf, len);
8461 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8466 sect->size = note->descsz;
8467 sect->filepos = note->descpos;
8468 sect->alignment_power = 2;
8479 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
8481 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8489 if (bed->elf_backend_grok_prstatus)
8490 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
8492 #if defined (HAVE_PRSTATUS_T)
8493 return elfcore_grok_prstatus (abfd, note);
8498 #if defined (HAVE_PSTATUS_T)
8500 return elfcore_grok_pstatus (abfd, note);
8503 #if defined (HAVE_LWPSTATUS_T)
8505 return elfcore_grok_lwpstatus (abfd, note);
8508 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
8509 return elfcore_grok_prfpreg (abfd, note);
8511 case NT_WIN32PSTATUS:
8512 return elfcore_grok_win32pstatus (abfd, note);
8514 case NT_PRXFPREG: /* Linux SSE extension */
8515 if (note->namesz == 6
8516 && strcmp (note->namedata, "LINUX") == 0)
8517 return elfcore_grok_prxfpreg (abfd, note);
8521 case NT_X86_XSTATE: /* Linux XSAVE extension */
8522 if (note->namesz == 6
8523 && strcmp (note->namedata, "LINUX") == 0)
8524 return elfcore_grok_xstatereg (abfd, note);
8529 if (note->namesz == 6
8530 && strcmp (note->namedata, "LINUX") == 0)
8531 return elfcore_grok_ppc_vmx (abfd, note);
8536 if (note->namesz == 6
8537 && strcmp (note->namedata, "LINUX") == 0)
8538 return elfcore_grok_ppc_vsx (abfd, note);
8542 case NT_S390_HIGH_GPRS:
8543 if (note->namesz == 6
8544 && strcmp (note->namedata, "LINUX") == 0)
8545 return elfcore_grok_s390_high_gprs (abfd, note);
8550 if (note->namesz == 6
8551 && strcmp (note->namedata, "LINUX") == 0)
8552 return elfcore_grok_s390_timer (abfd, note);
8556 case NT_S390_TODCMP:
8557 if (note->namesz == 6
8558 && strcmp (note->namedata, "LINUX") == 0)
8559 return elfcore_grok_s390_todcmp (abfd, note);
8563 case NT_S390_TODPREG:
8564 if (note->namesz == 6
8565 && strcmp (note->namedata, "LINUX") == 0)
8566 return elfcore_grok_s390_todpreg (abfd, note);
8571 if (note->namesz == 6
8572 && strcmp (note->namedata, "LINUX") == 0)
8573 return elfcore_grok_s390_ctrs (abfd, note);
8577 case NT_S390_PREFIX:
8578 if (note->namesz == 6
8579 && strcmp (note->namedata, "LINUX") == 0)
8580 return elfcore_grok_s390_prefix (abfd, note);
8584 case NT_S390_LAST_BREAK:
8585 if (note->namesz == 6
8586 && strcmp (note->namedata, "LINUX") == 0)
8587 return elfcore_grok_s390_last_break (abfd, note);
8591 case NT_S390_SYSTEM_CALL:
8592 if (note->namesz == 6
8593 && strcmp (note->namedata, "LINUX") == 0)
8594 return elfcore_grok_s390_system_call (abfd, note);
8599 if (note->namesz == 6
8600 && strcmp (note->namedata, "LINUX") == 0)
8601 return elfcore_grok_arm_vfp (abfd, note);
8607 if (bed->elf_backend_grok_psinfo)
8608 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
8610 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8611 return elfcore_grok_psinfo (abfd, note);
8618 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
8623 sect->size = note->descsz;
8624 sect->filepos = note->descpos;
8625 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8631 return elfcore_make_note_pseudosection (abfd, ".note.linuxcore.file",
8635 return elfcore_make_note_pseudosection (abfd, ".note.linuxcore.siginfo",
8641 elfobj_grok_gnu_build_id (bfd *abfd, Elf_Internal_Note *note)
8643 elf_tdata (abfd)->build_id_size = note->descsz;
8644 elf_tdata (abfd)->build_id = (bfd_byte *) bfd_alloc (abfd, note->descsz);
8645 if (elf_tdata (abfd)->build_id == NULL)
8648 memcpy (elf_tdata (abfd)->build_id, note->descdata, note->descsz);
8654 elfobj_grok_gnu_note (bfd *abfd, Elf_Internal_Note *note)
8661 case NT_GNU_BUILD_ID:
8662 return elfobj_grok_gnu_build_id (abfd, note);
8667 elfobj_grok_stapsdt_note_1 (bfd *abfd, Elf_Internal_Note *note)
8669 struct sdt_note *cur =
8670 (struct sdt_note *) bfd_alloc (abfd, sizeof (struct sdt_note)
8673 cur->next = (struct sdt_note *) (elf_tdata (abfd))->sdt_note_head;
8674 cur->size = (bfd_size_type) note->descsz;
8675 memcpy (cur->data, note->descdata, note->descsz);
8677 elf_tdata (abfd)->sdt_note_head = cur;
8683 elfobj_grok_stapsdt_note (bfd *abfd, Elf_Internal_Note *note)
8688 return elfobj_grok_stapsdt_note_1 (abfd, note);
8696 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
8700 cp = strchr (note->namedata, '@');
8703 *lwpidp = atoi(cp + 1);
8710 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
8712 /* Signal number at offset 0x08. */
8713 elf_tdata (abfd)->core_signal
8714 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
8716 /* Process ID at offset 0x50. */
8717 elf_tdata (abfd)->core_pid
8718 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
8720 /* Command name at 0x7c (max 32 bytes, including nul). */
8721 elf_tdata (abfd)->core_command
8722 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
8724 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
8729 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
8733 if (elfcore_netbsd_get_lwpid (note, &lwp))
8734 elf_tdata (abfd)->core_lwpid = lwp;
8736 if (note->type == NT_NETBSDCORE_PROCINFO)
8738 /* NetBSD-specific core "procinfo". Note that we expect to
8739 find this note before any of the others, which is fine,
8740 since the kernel writes this note out first when it
8741 creates a core file. */
8743 return elfcore_grok_netbsd_procinfo (abfd, note);
8746 /* As of Jan 2002 there are no other machine-independent notes
8747 defined for NetBSD core files. If the note type is less
8748 than the start of the machine-dependent note types, we don't
8751 if (note->type < NT_NETBSDCORE_FIRSTMACH)
8755 switch (bfd_get_arch (abfd))
8757 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
8758 PT_GETFPREGS == mach+2. */
8760 case bfd_arch_alpha:
8761 case bfd_arch_sparc:
8764 case NT_NETBSDCORE_FIRSTMACH+0:
8765 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8767 case NT_NETBSDCORE_FIRSTMACH+2:
8768 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8774 /* On all other arch's, PT_GETREGS == mach+1 and
8775 PT_GETFPREGS == mach+3. */
8780 case NT_NETBSDCORE_FIRSTMACH+1:
8781 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8783 case NT_NETBSDCORE_FIRSTMACH+3:
8784 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8794 elfcore_grok_openbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
8796 /* Signal number at offset 0x08. */
8797 elf_tdata (abfd)->core_signal
8798 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
8800 /* Process ID at offset 0x20. */
8801 elf_tdata (abfd)->core_pid
8802 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x20);
8804 /* Command name at 0x48 (max 32 bytes, including nul). */
8805 elf_tdata (abfd)->core_command
8806 = _bfd_elfcore_strndup (abfd, note->descdata + 0x48, 31);
8812 elfcore_grok_openbsd_note (bfd *abfd, Elf_Internal_Note *note)
8814 if (note->type == NT_OPENBSD_PROCINFO)
8815 return elfcore_grok_openbsd_procinfo (abfd, note);
8817 if (note->type == NT_OPENBSD_REGS)
8818 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8820 if (note->type == NT_OPENBSD_FPREGS)
8821 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8823 if (note->type == NT_OPENBSD_XFPREGS)
8824 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
8826 if (note->type == NT_OPENBSD_AUXV)
8828 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
8833 sect->size = note->descsz;
8834 sect->filepos = note->descpos;
8835 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8840 if (note->type == NT_OPENBSD_WCOOKIE)
8842 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".wcookie",
8847 sect->size = note->descsz;
8848 sect->filepos = note->descpos;
8849 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8858 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, long *tid)
8860 void *ddata = note->descdata;
8867 /* nto_procfs_status 'pid' field is at offset 0. */
8868 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
8870 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
8871 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
8873 /* nto_procfs_status 'flags' field is at offset 8. */
8874 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
8876 /* nto_procfs_status 'what' field is at offset 14. */
8877 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
8879 elf_tdata (abfd)->core_signal = sig;
8880 elf_tdata (abfd)->core_lwpid = *tid;
8883 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
8884 do not come from signals so we make sure we set the current
8885 thread just in case. */
8886 if (flags & 0x00000080)
8887 elf_tdata (abfd)->core_lwpid = *tid;
8889 /* Make a ".qnx_core_status/%d" section. */
8890 sprintf (buf, ".qnx_core_status/%ld", *tid);
8892 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
8897 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8901 sect->size = note->descsz;
8902 sect->filepos = note->descpos;
8903 sect->alignment_power = 2;
8905 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
8909 elfcore_grok_nto_regs (bfd *abfd,
8910 Elf_Internal_Note *note,
8918 /* Make a "(base)/%d" section. */
8919 sprintf (buf, "%s/%ld", base, tid);
8921 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
8926 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8930 sect->size = note->descsz;
8931 sect->filepos = note->descpos;
8932 sect->alignment_power = 2;
8934 /* This is the current thread. */
8935 if (elf_tdata (abfd)->core_lwpid == tid)
8936 return elfcore_maybe_make_sect (abfd, base, sect);
8941 #define BFD_QNT_CORE_INFO 7
8942 #define BFD_QNT_CORE_STATUS 8
8943 #define BFD_QNT_CORE_GREG 9
8944 #define BFD_QNT_CORE_FPREG 10
8947 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
8949 /* Every GREG section has a STATUS section before it. Store the
8950 tid from the previous call to pass down to the next gregs
8952 static long tid = 1;
8956 case BFD_QNT_CORE_INFO:
8957 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
8958 case BFD_QNT_CORE_STATUS:
8959 return elfcore_grok_nto_status (abfd, note, &tid);
8960 case BFD_QNT_CORE_GREG:
8961 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
8962 case BFD_QNT_CORE_FPREG:
8963 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
8970 elfcore_grok_spu_note (bfd *abfd, Elf_Internal_Note *note)
8976 /* Use note name as section name. */
8978 name = (char *) bfd_alloc (abfd, len);
8981 memcpy (name, note->namedata, len);
8982 name[len - 1] = '\0';
8984 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8988 sect->size = note->descsz;
8989 sect->filepos = note->descpos;
8990 sect->alignment_power = 1;
8995 /* Function: elfcore_write_note
8998 buffer to hold note, and current size of buffer
9002 size of data for note
9004 Writes note to end of buffer. ELF64 notes are written exactly as
9005 for ELF32, despite the current (as of 2006) ELF gabi specifying
9006 that they ought to have 8-byte namesz and descsz field, and have
9007 8-byte alignment. Other writers, eg. Linux kernel, do the same.
9010 Pointer to realloc'd buffer, *BUFSIZ updated. */
9013 elfcore_write_note (bfd *abfd,
9021 Elf_External_Note *xnp;
9028 namesz = strlen (name) + 1;
9030 newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4);
9032 buf = (char *) realloc (buf, *bufsiz + newspace);
9035 dest = buf + *bufsiz;
9036 *bufsiz += newspace;
9037 xnp = (Elf_External_Note *) dest;
9038 H_PUT_32 (abfd, namesz, xnp->namesz);
9039 H_PUT_32 (abfd, size, xnp->descsz);
9040 H_PUT_32 (abfd, type, xnp->type);
9044 memcpy (dest, name, namesz);
9052 memcpy (dest, input, size);
9063 elfcore_write_prpsinfo (bfd *abfd,
9069 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9071 if (bed->elf_backend_write_core_note != NULL)
9074 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
9075 NT_PRPSINFO, fname, psargs);
9080 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
9081 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
9082 if (bed->s->elfclass == ELFCLASS32)
9084 #if defined (HAVE_PSINFO32_T)
9086 int note_type = NT_PSINFO;
9089 int note_type = NT_PRPSINFO;
9092 memset (&data, 0, sizeof (data));
9093 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
9094 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
9095 return elfcore_write_note (abfd, buf, bufsiz,
9096 "CORE", note_type, &data, sizeof (data));
9101 #if defined (HAVE_PSINFO_T)
9103 int note_type = NT_PSINFO;
9106 int note_type = NT_PRPSINFO;
9109 memset (&data, 0, sizeof (data));
9110 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
9111 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
9112 return elfcore_write_note (abfd, buf, bufsiz,
9113 "CORE", note_type, &data, sizeof (data));
9115 #endif /* PSINFO_T or PRPSINFO_T */
9122 elfcore_write_prstatus (bfd *abfd,
9129 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9131 if (bed->elf_backend_write_core_note != NULL)
9134 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
9136 pid, cursig, gregs);
9141 #if defined (HAVE_PRSTATUS_T)
9142 #if defined (HAVE_PRSTATUS32_T)
9143 if (bed->s->elfclass == ELFCLASS32)
9145 prstatus32_t prstat;
9147 memset (&prstat, 0, sizeof (prstat));
9148 prstat.pr_pid = pid;
9149 prstat.pr_cursig = cursig;
9150 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
9151 return elfcore_write_note (abfd, buf, bufsiz, "CORE",
9152 NT_PRSTATUS, &prstat, sizeof (prstat));
9159 memset (&prstat, 0, sizeof (prstat));
9160 prstat.pr_pid = pid;
9161 prstat.pr_cursig = cursig;
9162 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
9163 return elfcore_write_note (abfd, buf, bufsiz, "CORE",
9164 NT_PRSTATUS, &prstat, sizeof (prstat));
9166 #endif /* HAVE_PRSTATUS_T */
9172 #if defined (HAVE_LWPSTATUS_T)
9174 elfcore_write_lwpstatus (bfd *abfd,
9181 lwpstatus_t lwpstat;
9182 const char *note_name = "CORE";
9184 memset (&lwpstat, 0, sizeof (lwpstat));
9185 lwpstat.pr_lwpid = pid >> 16;
9186 lwpstat.pr_cursig = cursig;
9187 #if defined (HAVE_LWPSTATUS_T_PR_REG)
9188 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
9189 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
9191 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
9192 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
9194 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
9195 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
9198 return elfcore_write_note (abfd, buf, bufsiz, note_name,
9199 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
9201 #endif /* HAVE_LWPSTATUS_T */
9203 #if defined (HAVE_PSTATUS_T)
9205 elfcore_write_pstatus (bfd *abfd,
9209 int cursig ATTRIBUTE_UNUSED,
9210 const void *gregs ATTRIBUTE_UNUSED)
9212 const char *note_name = "CORE";
9213 #if defined (HAVE_PSTATUS32_T)
9214 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9216 if (bed->s->elfclass == ELFCLASS32)
9220 memset (&pstat, 0, sizeof (pstat));
9221 pstat.pr_pid = pid & 0xffff;
9222 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
9223 NT_PSTATUS, &pstat, sizeof (pstat));
9231 memset (&pstat, 0, sizeof (pstat));
9232 pstat.pr_pid = pid & 0xffff;
9233 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
9234 NT_PSTATUS, &pstat, sizeof (pstat));
9238 #endif /* HAVE_PSTATUS_T */
9241 elfcore_write_prfpreg (bfd *abfd,
9247 const char *note_name = "CORE";
9248 return elfcore_write_note (abfd, buf, bufsiz,
9249 note_name, NT_FPREGSET, fpregs, size);
9253 elfcore_write_prxfpreg (bfd *abfd,
9256 const void *xfpregs,
9259 char *note_name = "LINUX";
9260 return elfcore_write_note (abfd, buf, bufsiz,
9261 note_name, NT_PRXFPREG, xfpregs, size);
9265 elfcore_write_xstatereg (bfd *abfd, char *buf, int *bufsiz,
9266 const void *xfpregs, int size)
9268 char *note_name = "LINUX";
9269 return elfcore_write_note (abfd, buf, bufsiz,
9270 note_name, NT_X86_XSTATE, xfpregs, size);
9274 elfcore_write_ppc_vmx (bfd *abfd,
9277 const void *ppc_vmx,
9280 char *note_name = "LINUX";
9281 return elfcore_write_note (abfd, buf, bufsiz,
9282 note_name, NT_PPC_VMX, ppc_vmx, size);
9286 elfcore_write_ppc_vsx (bfd *abfd,
9289 const void *ppc_vsx,
9292 char *note_name = "LINUX";
9293 return elfcore_write_note (abfd, buf, bufsiz,
9294 note_name, NT_PPC_VSX, ppc_vsx, size);
9298 elfcore_write_s390_high_gprs (bfd *abfd,
9301 const void *s390_high_gprs,
9304 char *note_name = "LINUX";
9305 return elfcore_write_note (abfd, buf, bufsiz,
9306 note_name, NT_S390_HIGH_GPRS,
9307 s390_high_gprs, size);
9311 elfcore_write_s390_timer (bfd *abfd,
9314 const void *s390_timer,
9317 char *note_name = "LINUX";
9318 return elfcore_write_note (abfd, buf, bufsiz,
9319 note_name, NT_S390_TIMER, s390_timer, size);
9323 elfcore_write_s390_todcmp (bfd *abfd,
9326 const void *s390_todcmp,
9329 char *note_name = "LINUX";
9330 return elfcore_write_note (abfd, buf, bufsiz,
9331 note_name, NT_S390_TODCMP, s390_todcmp, size);
9335 elfcore_write_s390_todpreg (bfd *abfd,
9338 const void *s390_todpreg,
9341 char *note_name = "LINUX";
9342 return elfcore_write_note (abfd, buf, bufsiz,
9343 note_name, NT_S390_TODPREG, s390_todpreg, size);
9347 elfcore_write_s390_ctrs (bfd *abfd,
9350 const void *s390_ctrs,
9353 char *note_name = "LINUX";
9354 return elfcore_write_note (abfd, buf, bufsiz,
9355 note_name, NT_S390_CTRS, s390_ctrs, size);
9359 elfcore_write_s390_prefix (bfd *abfd,
9362 const void *s390_prefix,
9365 char *note_name = "LINUX";
9366 return elfcore_write_note (abfd, buf, bufsiz,
9367 note_name, NT_S390_PREFIX, s390_prefix, size);
9371 elfcore_write_s390_last_break (bfd *abfd,
9374 const void *s390_last_break,
9377 char *note_name = "LINUX";
9378 return elfcore_write_note (abfd, buf, bufsiz,
9379 note_name, NT_S390_LAST_BREAK,
9380 s390_last_break, size);
9384 elfcore_write_s390_system_call (bfd *abfd,
9387 const void *s390_system_call,
9390 char *note_name = "LINUX";
9391 return elfcore_write_note (abfd, buf, bufsiz,
9392 note_name, NT_S390_SYSTEM_CALL,
9393 s390_system_call, size);
9397 elfcore_write_arm_vfp (bfd *abfd,
9400 const void *arm_vfp,
9403 char *note_name = "LINUX";
9404 return elfcore_write_note (abfd, buf, bufsiz,
9405 note_name, NT_ARM_VFP, arm_vfp, size);
9409 elfcore_write_register_note (bfd *abfd,
9412 const char *section,
9416 if (strcmp (section, ".reg2") == 0)
9417 return elfcore_write_prfpreg (abfd, buf, bufsiz, data, size);
9418 if (strcmp (section, ".reg-xfp") == 0)
9419 return elfcore_write_prxfpreg (abfd, buf, bufsiz, data, size);
9420 if (strcmp (section, ".reg-xstate") == 0)
9421 return elfcore_write_xstatereg (abfd, buf, bufsiz, data, size);
9422 if (strcmp (section, ".reg-ppc-vmx") == 0)
9423 return elfcore_write_ppc_vmx (abfd, buf, bufsiz, data, size);
9424 if (strcmp (section, ".reg-ppc-vsx") == 0)
9425 return elfcore_write_ppc_vsx (abfd, buf, bufsiz, data, size);
9426 if (strcmp (section, ".reg-s390-high-gprs") == 0)
9427 return elfcore_write_s390_high_gprs (abfd, buf, bufsiz, data, size);
9428 if (strcmp (section, ".reg-s390-timer") == 0)
9429 return elfcore_write_s390_timer (abfd, buf, bufsiz, data, size);
9430 if (strcmp (section, ".reg-s390-todcmp") == 0)
9431 return elfcore_write_s390_todcmp (abfd, buf, bufsiz, data, size);
9432 if (strcmp (section, ".reg-s390-todpreg") == 0)
9433 return elfcore_write_s390_todpreg (abfd, buf, bufsiz, data, size);
9434 if (strcmp (section, ".reg-s390-ctrs") == 0)
9435 return elfcore_write_s390_ctrs (abfd, buf, bufsiz, data, size);
9436 if (strcmp (section, ".reg-s390-prefix") == 0)
9437 return elfcore_write_s390_prefix (abfd, buf, bufsiz, data, size);
9438 if (strcmp (section, ".reg-s390-last-break") == 0)
9439 return elfcore_write_s390_last_break (abfd, buf, bufsiz, data, size);
9440 if (strcmp (section, ".reg-s390-system-call") == 0)
9441 return elfcore_write_s390_system_call (abfd, buf, bufsiz, data, size);
9442 if (strcmp (section, ".reg-arm-vfp") == 0)
9443 return elfcore_write_arm_vfp (abfd, buf, bufsiz, data, size);
9448 elf_parse_notes (bfd *abfd, char *buf, size_t size, file_ptr offset)
9453 while (p < buf + size)
9455 /* FIXME: bad alignment assumption. */
9456 Elf_External_Note *xnp = (Elf_External_Note *) p;
9457 Elf_Internal_Note in;
9459 if (offsetof (Elf_External_Note, name) > buf - p + size)
9462 in.type = H_GET_32 (abfd, xnp->type);
9464 in.namesz = H_GET_32 (abfd, xnp->namesz);
9465 in.namedata = xnp->name;
9466 if (in.namesz > buf - in.namedata + size)
9469 in.descsz = H_GET_32 (abfd, xnp->descsz);
9470 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
9471 in.descpos = offset + (in.descdata - buf);
9473 && (in.descdata >= buf + size
9474 || in.descsz > buf - in.descdata + size))
9477 switch (bfd_get_format (abfd))
9483 if (CONST_STRNEQ (in.namedata, "NetBSD-CORE"))
9485 if (! elfcore_grok_netbsd_note (abfd, &in))
9488 else if (CONST_STRNEQ (in.namedata, "OpenBSD"))
9490 if (! elfcore_grok_openbsd_note (abfd, &in))
9493 else if (CONST_STRNEQ (in.namedata, "QNX"))
9495 if (! elfcore_grok_nto_note (abfd, &in))
9498 else if (CONST_STRNEQ (in.namedata, "SPU/"))
9500 if (! elfcore_grok_spu_note (abfd, &in))
9505 if (! elfcore_grok_note (abfd, &in))
9511 if (in.namesz == sizeof "GNU" && strcmp (in.namedata, "GNU") == 0)
9513 if (! elfobj_grok_gnu_note (abfd, &in))
9516 else if (in.namesz == sizeof "stapsdt"
9517 && strcmp (in.namedata, "stapsdt") == 0)
9519 if (! elfobj_grok_stapsdt_note (abfd, &in))
9525 p = in.descdata + BFD_ALIGN (in.descsz, 4);
9532 elf_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
9539 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
9542 buf = (char *) bfd_malloc (size);
9546 if (bfd_bread (buf, size, abfd) != size
9547 || !elf_parse_notes (abfd, buf, size, offset))
9557 /* Providing external access to the ELF program header table. */
9559 /* Return an upper bound on the number of bytes required to store a
9560 copy of ABFD's program header table entries. Return -1 if an error
9561 occurs; bfd_get_error will return an appropriate code. */
9564 bfd_get_elf_phdr_upper_bound (bfd *abfd)
9566 if (abfd->xvec->flavour != bfd_target_elf_flavour)
9568 bfd_set_error (bfd_error_wrong_format);
9572 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
9575 /* Copy ABFD's program header table entries to *PHDRS. The entries
9576 will be stored as an array of Elf_Internal_Phdr structures, as
9577 defined in include/elf/internal.h. To find out how large the
9578 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
9580 Return the number of program header table entries read, or -1 if an
9581 error occurs; bfd_get_error will return an appropriate code. */
9584 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
9588 if (abfd->xvec->flavour != bfd_target_elf_flavour)
9590 bfd_set_error (bfd_error_wrong_format);
9594 num_phdrs = elf_elfheader (abfd)->e_phnum;
9595 memcpy (phdrs, elf_tdata (abfd)->phdr,
9596 num_phdrs * sizeof (Elf_Internal_Phdr));
9601 enum elf_reloc_type_class
9602 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
9604 return reloc_class_normal;
9607 /* For RELA architectures, return the relocation value for a
9608 relocation against a local symbol. */
9611 _bfd_elf_rela_local_sym (bfd *abfd,
9612 Elf_Internal_Sym *sym,
9614 Elf_Internal_Rela *rel)
9616 asection *sec = *psec;
9619 relocation = (sec->output_section->vma
9620 + sec->output_offset
9622 if ((sec->flags & SEC_MERGE)
9623 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
9624 && sec->sec_info_type == SEC_INFO_TYPE_MERGE)
9627 _bfd_merged_section_offset (abfd, psec,
9628 elf_section_data (sec)->sec_info,
9629 sym->st_value + rel->r_addend);
9632 /* If we have changed the section, and our original section is
9633 marked with SEC_EXCLUDE, it means that the original
9634 SEC_MERGE section has been completely subsumed in some
9635 other SEC_MERGE section. In this case, we need to leave
9636 some info around for --emit-relocs. */
9637 if ((sec->flags & SEC_EXCLUDE) != 0)
9638 sec->kept_section = *psec;
9641 rel->r_addend -= relocation;
9642 rel->r_addend += sec->output_section->vma + sec->output_offset;
9648 _bfd_elf_rel_local_sym (bfd *abfd,
9649 Elf_Internal_Sym *sym,
9653 asection *sec = *psec;
9655 if (sec->sec_info_type != SEC_INFO_TYPE_MERGE)
9656 return sym->st_value + addend;
9658 return _bfd_merged_section_offset (abfd, psec,
9659 elf_section_data (sec)->sec_info,
9660 sym->st_value + addend);
9664 _bfd_elf_section_offset (bfd *abfd,
9665 struct bfd_link_info *info,
9669 switch (sec->sec_info_type)
9671 case SEC_INFO_TYPE_STABS:
9672 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
9674 case SEC_INFO_TYPE_EH_FRAME:
9675 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
9677 if ((sec->flags & SEC_ELF_REVERSE_COPY) != 0)
9679 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9680 bfd_size_type address_size = bed->s->arch_size / 8;
9681 offset = sec->size - offset - address_size;
9687 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
9688 reconstruct an ELF file by reading the segments out of remote memory
9689 based on the ELF file header at EHDR_VMA and the ELF program headers it
9690 points to. If not null, *LOADBASEP is filled in with the difference
9691 between the VMAs from which the segments were read, and the VMAs the
9692 file headers (and hence BFD's idea of each section's VMA) put them at.
9694 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
9695 remote memory at target address VMA into the local buffer at MYADDR; it
9696 should return zero on success or an `errno' code on failure. TEMPL must
9697 be a BFD for an ELF target with the word size and byte order found in
9698 the remote memory. */
9701 bfd_elf_bfd_from_remote_memory
9705 int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type))
9707 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
9708 (templ, ehdr_vma, loadbasep, target_read_memory);
9712 _bfd_elf_get_synthetic_symtab (bfd *abfd,
9713 long symcount ATTRIBUTE_UNUSED,
9714 asymbol **syms ATTRIBUTE_UNUSED,
9719 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9722 const char *relplt_name;
9723 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
9727 Elf_Internal_Shdr *hdr;
9733 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
9736 if (dynsymcount <= 0)
9739 if (!bed->plt_sym_val)
9742 relplt_name = bed->relplt_name;
9743 if (relplt_name == NULL)
9744 relplt_name = bed->rela_plts_and_copies_p ? ".rela.plt" : ".rel.plt";
9745 relplt = bfd_get_section_by_name (abfd, relplt_name);
9749 hdr = &elf_section_data (relplt)->this_hdr;
9750 if (hdr->sh_link != elf_dynsymtab (abfd)
9751 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
9754 plt = bfd_get_section_by_name (abfd, ".plt");
9758 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
9759 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
9762 count = relplt->size / hdr->sh_entsize;
9763 size = count * sizeof (asymbol);
9764 p = relplt->relocation;
9765 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
9767 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
9771 size += sizeof ("+0x") - 1 + 8 + 8 * (bed->s->elfclass == ELFCLASS64);
9773 size += sizeof ("+0x") - 1 + 8;
9778 s = *ret = (asymbol *) bfd_malloc (size);
9782 names = (char *) (s + count);
9783 p = relplt->relocation;
9785 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
9790 addr = bed->plt_sym_val (i, plt, p);
9791 if (addr == (bfd_vma) -1)
9794 *s = **p->sym_ptr_ptr;
9795 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
9796 we are defining a symbol, ensure one of them is set. */
9797 if ((s->flags & BSF_LOCAL) == 0)
9798 s->flags |= BSF_GLOBAL;
9799 s->flags |= BSF_SYNTHETIC;
9801 s->value = addr - plt->vma;
9804 len = strlen ((*p->sym_ptr_ptr)->name);
9805 memcpy (names, (*p->sym_ptr_ptr)->name, len);
9811 memcpy (names, "+0x", sizeof ("+0x") - 1);
9812 names += sizeof ("+0x") - 1;
9813 bfd_sprintf_vma (abfd, buf, p->addend);
9814 for (a = buf; *a == '0'; ++a)
9817 memcpy (names, a, len);
9820 memcpy (names, "@plt", sizeof ("@plt"));
9821 names += sizeof ("@plt");
9828 /* It is only used by x86-64 so far. */
9829 asection _bfd_elf_large_com_section
9830 = BFD_FAKE_SECTION (_bfd_elf_large_com_section,
9831 SEC_IS_COMMON, NULL, "LARGE_COMMON", 0);
9834 _bfd_elf_set_osabi (bfd * abfd,
9835 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
9837 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
9839 i_ehdrp = elf_elfheader (abfd);
9841 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
9843 /* To make things simpler for the loader on Linux systems we set the
9844 osabi field to ELFOSABI_GNU if the binary contains symbols of
9845 the STT_GNU_IFUNC type or STB_GNU_UNIQUE binding. */
9846 if (i_ehdrp->e_ident[EI_OSABI] == ELFOSABI_NONE
9847 && elf_tdata (abfd)->has_gnu_symbols)
9848 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_GNU;
9852 /* Return TRUE for ELF symbol types that represent functions.
9853 This is the default version of this function, which is sufficient for
9854 most targets. It returns true if TYPE is STT_FUNC or STT_GNU_IFUNC. */
9857 _bfd_elf_is_function_type (unsigned int type)
9859 return (type == STT_FUNC
9860 || type == STT_GNU_IFUNC);
9863 /* If the ELF symbol SYM might be a function in SEC, return the
9864 function size and set *CODE_OFF to the function's entry point,
9865 otherwise return zero. */
9868 _bfd_elf_maybe_function_sym (const asymbol *sym, asection *sec,
9873 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
9874 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0
9875 || sym->section != sec)
9878 *code_off = sym->value;
9880 if (!(sym->flags & BSF_SYNTHETIC))
9881 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;