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
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) \
549 ( (shdr)->sh_type == SHT_GROUP \
550 && (shdr)->sh_size >= (2 * GRP_ENTRY_SIZE) \
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))
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))
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. */
887 } debug_sections [] =
889 { STRING_COMMA_LEN ("debug") }, /* 'd' */
890 { NULL, 0 }, /* 'e' */
891 { NULL, 0 }, /* 'f' */
892 { STRING_COMMA_LEN ("gnu.linkonce.wi.") }, /* 'g' */
893 { NULL, 0 }, /* 'h' */
894 { NULL, 0 }, /* 'i' */
895 { NULL, 0 }, /* 'j' */
896 { NULL, 0 }, /* 'k' */
897 { STRING_COMMA_LEN ("line") }, /* 'l' */
898 { NULL, 0 }, /* 'm' */
899 { NULL, 0 }, /* 'n' */
900 { NULL, 0 }, /* 'o' */
901 { NULL, 0 }, /* 'p' */
902 { NULL, 0 }, /* 'q' */
903 { NULL, 0 }, /* 'r' */
904 { STRING_COMMA_LEN ("stab") }, /* 's' */
905 { NULL, 0 }, /* 't' */
906 { NULL, 0 }, /* 'u' */
907 { NULL, 0 }, /* 'v' */
908 { NULL, 0 }, /* 'w' */
909 { NULL, 0 }, /* 'x' */
910 { NULL, 0 }, /* 'y' */
911 { STRING_COMMA_LEN ("zdebug") } /* 'z' */
916 int i = name [1] - 'd';
918 && i < (int) ARRAY_SIZE (debug_sections)
919 && debug_sections [i].name != NULL
920 && strncmp (&name [1], debug_sections [i].name,
921 debug_sections [i].len) == 0)
922 flags |= SEC_DEBUGGING;
926 /* As a GNU extension, if the name begins with .gnu.linkonce, we
927 only link a single copy of the section. This is used to support
928 g++. g++ will emit each template expansion in its own section.
929 The symbols will be defined as weak, so that multiple definitions
930 are permitted. The GNU linker extension is to actually discard
931 all but one of the sections. */
932 if (CONST_STRNEQ (name, ".gnu.linkonce")
933 && elf_next_in_group (newsect) == NULL)
934 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
936 bed = get_elf_backend_data (abfd);
937 if (bed->elf_backend_section_flags)
938 if (! bed->elf_backend_section_flags (&flags, hdr))
941 if (! bfd_set_section_flags (abfd, newsect, flags))
944 /* We do not parse the PT_NOTE segments as we are interested even in the
945 separate debug info files which may have the segments offsets corrupted.
946 PT_NOTEs from the core files are currently not parsed using BFD. */
947 if (hdr->sh_type == SHT_NOTE)
951 if (!bfd_malloc_and_get_section (abfd, newsect, &contents))
954 elf_parse_notes (abfd, (char *) contents, hdr->sh_size, -1);
958 if ((flags & SEC_ALLOC) != 0)
960 Elf_Internal_Phdr *phdr;
961 unsigned int i, nload;
963 /* Some ELF linkers produce binaries with all the program header
964 p_paddr fields zero. If we have such a binary with more than
965 one PT_LOAD header, then leave the section lma equal to vma
966 so that we don't create sections with overlapping lma. */
967 phdr = elf_tdata (abfd)->phdr;
968 for (nload = 0, i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
969 if (phdr->p_paddr != 0)
971 else if (phdr->p_type == PT_LOAD && phdr->p_memsz != 0)
973 if (i >= elf_elfheader (abfd)->e_phnum && nload > 1)
976 phdr = elf_tdata (abfd)->phdr;
977 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
979 if (phdr->p_type == PT_LOAD
980 && ELF_SECTION_IN_SEGMENT (hdr, phdr))
982 if ((flags & SEC_LOAD) == 0)
983 newsect->lma = (phdr->p_paddr
984 + hdr->sh_addr - phdr->p_vaddr);
986 /* We used to use the same adjustment for SEC_LOAD
987 sections, but that doesn't work if the segment
988 is packed with code from multiple VMAs.
989 Instead we calculate the section LMA based on
990 the segment LMA. It is assumed that the
991 segment will contain sections with contiguous
992 LMAs, even if the VMAs are not. */
993 newsect->lma = (phdr->p_paddr
994 + hdr->sh_offset - phdr->p_offset);
996 /* With contiguous segments, we can't tell from file
997 offsets whether a section with zero size should
998 be placed at the end of one segment or the
999 beginning of the next. Decide based on vaddr. */
1000 if (hdr->sh_addr >= phdr->p_vaddr
1001 && (hdr->sh_addr + hdr->sh_size
1002 <= phdr->p_vaddr + phdr->p_memsz))
1008 /* Compress/decompress DWARF debug sections with names: .debug_* and
1009 .zdebug_*, after the section flags is set. */
1010 if ((flags & SEC_DEBUGGING)
1011 && ((name[1] == 'd' && name[6] == '_')
1012 || (name[1] == 'z' && name[7] == '_')))
1014 enum { nothing, compress, decompress } action = nothing;
1017 if (bfd_is_section_compressed (abfd, newsect))
1019 /* Compressed section. Check if we should decompress. */
1020 if ((abfd->flags & BFD_DECOMPRESS))
1021 action = decompress;
1025 /* Normal section. Check if we should compress. */
1026 if ((abfd->flags & BFD_COMPRESS))
1036 if (!bfd_init_section_compress_status (abfd, newsect))
1038 (*_bfd_error_handler)
1039 (_("%B: unable to initialize commpress status for section %s"),
1045 unsigned int len = strlen (name);
1047 new_name = bfd_alloc (abfd, len + 2);
1048 if (new_name == NULL)
1052 memcpy (new_name + 2, name + 1, len);
1056 if (!bfd_init_section_decompress_status (abfd, newsect))
1058 (*_bfd_error_handler)
1059 (_("%B: unable to initialize decommpress status for section %s"),
1065 unsigned int len = strlen (name);
1067 new_name = bfd_alloc (abfd, len);
1068 if (new_name == NULL)
1071 memcpy (new_name + 1, name + 2, len - 1);
1075 if (new_name != NULL)
1076 bfd_rename_section (abfd, newsect, new_name);
1082 const char *const bfd_elf_section_type_names[] = {
1083 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
1084 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
1085 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
1088 /* ELF relocs are against symbols. If we are producing relocatable
1089 output, and the reloc is against an external symbol, and nothing
1090 has given us any additional addend, the resulting reloc will also
1091 be against the same symbol. In such a case, we don't want to
1092 change anything about the way the reloc is handled, since it will
1093 all be done at final link time. Rather than put special case code
1094 into bfd_perform_relocation, all the reloc types use this howto
1095 function. It just short circuits the reloc if producing
1096 relocatable output against an external symbol. */
1098 bfd_reloc_status_type
1099 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1100 arelent *reloc_entry,
1102 void *data ATTRIBUTE_UNUSED,
1103 asection *input_section,
1105 char **error_message ATTRIBUTE_UNUSED)
1107 if (output_bfd != NULL
1108 && (symbol->flags & BSF_SECTION_SYM) == 0
1109 && (! reloc_entry->howto->partial_inplace
1110 || reloc_entry->addend == 0))
1112 reloc_entry->address += input_section->output_offset;
1113 return bfd_reloc_ok;
1116 return bfd_reloc_continue;
1119 /* Copy the program header and other data from one object module to
1123 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
1125 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1126 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1129 BFD_ASSERT (!elf_flags_init (obfd)
1130 || (elf_elfheader (obfd)->e_flags
1131 == elf_elfheader (ibfd)->e_flags));
1133 elf_gp (obfd) = elf_gp (ibfd);
1134 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1135 elf_flags_init (obfd) = TRUE;
1137 /* Copy object attributes. */
1138 _bfd_elf_copy_obj_attributes (ibfd, obfd);
1143 get_segment_type (unsigned int p_type)
1148 case PT_NULL: pt = "NULL"; break;
1149 case PT_LOAD: pt = "LOAD"; break;
1150 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1151 case PT_INTERP: pt = "INTERP"; break;
1152 case PT_NOTE: pt = "NOTE"; break;
1153 case PT_SHLIB: pt = "SHLIB"; break;
1154 case PT_PHDR: pt = "PHDR"; break;
1155 case PT_TLS: pt = "TLS"; break;
1156 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1157 case PT_GNU_STACK: pt = "STACK"; break;
1158 case PT_GNU_RELRO: pt = "RELRO"; break;
1159 default: pt = NULL; break;
1164 /* Print out the program headers. */
1167 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1169 FILE *f = (FILE *) farg;
1170 Elf_Internal_Phdr *p;
1172 bfd_byte *dynbuf = NULL;
1174 p = elf_tdata (abfd)->phdr;
1179 fprintf (f, _("\nProgram Header:\n"));
1180 c = elf_elfheader (abfd)->e_phnum;
1181 for (i = 0; i < c; i++, p++)
1183 const char *pt = get_segment_type (p->p_type);
1188 sprintf (buf, "0x%lx", p->p_type);
1191 fprintf (f, "%8s off 0x", pt);
1192 bfd_fprintf_vma (abfd, f, p->p_offset);
1193 fprintf (f, " vaddr 0x");
1194 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1195 fprintf (f, " paddr 0x");
1196 bfd_fprintf_vma (abfd, f, p->p_paddr);
1197 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1198 fprintf (f, " filesz 0x");
1199 bfd_fprintf_vma (abfd, f, p->p_filesz);
1200 fprintf (f, " memsz 0x");
1201 bfd_fprintf_vma (abfd, f, p->p_memsz);
1202 fprintf (f, " flags %c%c%c",
1203 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1204 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1205 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1206 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1207 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1212 s = bfd_get_section_by_name (abfd, ".dynamic");
1215 unsigned int elfsec;
1216 unsigned long shlink;
1217 bfd_byte *extdyn, *extdynend;
1219 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1221 fprintf (f, _("\nDynamic Section:\n"));
1223 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1226 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1227 if (elfsec == SHN_BAD)
1229 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1231 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1232 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1235 extdynend = extdyn + s->size;
1236 for (; extdyn < extdynend; extdyn += extdynsize)
1238 Elf_Internal_Dyn dyn;
1239 const char *name = "";
1241 bfd_boolean stringp;
1242 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1244 (*swap_dyn_in) (abfd, extdyn, &dyn);
1246 if (dyn.d_tag == DT_NULL)
1253 if (bed->elf_backend_get_target_dtag)
1254 name = (*bed->elf_backend_get_target_dtag) (dyn.d_tag);
1256 if (!strcmp (name, ""))
1258 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1263 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1264 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1265 case DT_PLTGOT: name = "PLTGOT"; break;
1266 case DT_HASH: name = "HASH"; break;
1267 case DT_STRTAB: name = "STRTAB"; break;
1268 case DT_SYMTAB: name = "SYMTAB"; break;
1269 case DT_RELA: name = "RELA"; break;
1270 case DT_RELASZ: name = "RELASZ"; break;
1271 case DT_RELAENT: name = "RELAENT"; break;
1272 case DT_STRSZ: name = "STRSZ"; break;
1273 case DT_SYMENT: name = "SYMENT"; break;
1274 case DT_INIT: name = "INIT"; break;
1275 case DT_FINI: name = "FINI"; break;
1276 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1277 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1278 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1279 case DT_REL: name = "REL"; break;
1280 case DT_RELSZ: name = "RELSZ"; break;
1281 case DT_RELENT: name = "RELENT"; break;
1282 case DT_PLTREL: name = "PLTREL"; break;
1283 case DT_DEBUG: name = "DEBUG"; break;
1284 case DT_TEXTREL: name = "TEXTREL"; break;
1285 case DT_JMPREL: name = "JMPREL"; break;
1286 case DT_BIND_NOW: name = "BIND_NOW"; break;
1287 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1288 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1289 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1290 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1291 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1292 case DT_FLAGS: name = "FLAGS"; break;
1293 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1294 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1295 case DT_CHECKSUM: name = "CHECKSUM"; break;
1296 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1297 case DT_MOVEENT: name = "MOVEENT"; break;
1298 case DT_MOVESZ: name = "MOVESZ"; break;
1299 case DT_FEATURE: name = "FEATURE"; break;
1300 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1301 case DT_SYMINSZ: name = "SYMINSZ"; break;
1302 case DT_SYMINENT: name = "SYMINENT"; break;
1303 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1304 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1305 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1306 case DT_PLTPAD: name = "PLTPAD"; break;
1307 case DT_MOVETAB: name = "MOVETAB"; break;
1308 case DT_SYMINFO: name = "SYMINFO"; break;
1309 case DT_RELACOUNT: name = "RELACOUNT"; break;
1310 case DT_RELCOUNT: name = "RELCOUNT"; break;
1311 case DT_FLAGS_1: name = "FLAGS_1"; break;
1312 case DT_VERSYM: name = "VERSYM"; break;
1313 case DT_VERDEF: name = "VERDEF"; break;
1314 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1315 case DT_VERNEED: name = "VERNEED"; break;
1316 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1317 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1318 case DT_USED: name = "USED"; break;
1319 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1320 case DT_GNU_HASH: name = "GNU_HASH"; break;
1323 fprintf (f, " %-20s ", name);
1327 bfd_fprintf_vma (abfd, f, dyn.d_un.d_val);
1332 unsigned int tagv = dyn.d_un.d_val;
1334 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1337 fprintf (f, "%s", string);
1346 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1347 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1349 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1353 if (elf_dynverdef (abfd) != 0)
1355 Elf_Internal_Verdef *t;
1357 fprintf (f, _("\nVersion definitions:\n"));
1358 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1360 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1361 t->vd_flags, t->vd_hash,
1362 t->vd_nodename ? t->vd_nodename : "<corrupt>");
1363 if (t->vd_auxptr != NULL && t->vd_auxptr->vda_nextptr != NULL)
1365 Elf_Internal_Verdaux *a;
1368 for (a = t->vd_auxptr->vda_nextptr;
1372 a->vda_nodename ? a->vda_nodename : "<corrupt>");
1378 if (elf_dynverref (abfd) != 0)
1380 Elf_Internal_Verneed *t;
1382 fprintf (f, _("\nVersion References:\n"));
1383 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1385 Elf_Internal_Vernaux *a;
1387 fprintf (f, _(" required from %s:\n"),
1388 t->vn_filename ? t->vn_filename : "<corrupt>");
1389 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1390 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1391 a->vna_flags, a->vna_other,
1392 a->vna_nodename ? a->vna_nodename : "<corrupt>");
1404 /* Display ELF-specific fields of a symbol. */
1407 bfd_elf_print_symbol (bfd *abfd,
1410 bfd_print_symbol_type how)
1412 FILE *file = (FILE *) filep;
1415 case bfd_print_symbol_name:
1416 fprintf (file, "%s", symbol->name);
1418 case bfd_print_symbol_more:
1419 fprintf (file, "elf ");
1420 bfd_fprintf_vma (abfd, file, symbol->value);
1421 fprintf (file, " %lx", (unsigned long) symbol->flags);
1423 case bfd_print_symbol_all:
1425 const char *section_name;
1426 const char *name = NULL;
1427 const struct elf_backend_data *bed;
1428 unsigned char st_other;
1431 section_name = symbol->section ? symbol->section->name : "(*none*)";
1433 bed = get_elf_backend_data (abfd);
1434 if (bed->elf_backend_print_symbol_all)
1435 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1439 name = symbol->name;
1440 bfd_print_symbol_vandf (abfd, file, symbol);
1443 fprintf (file, " %s\t", section_name);
1444 /* Print the "other" value for a symbol. For common symbols,
1445 we've already printed the size; now print the alignment.
1446 For other symbols, we have no specified alignment, and
1447 we've printed the address; now print the size. */
1448 if (symbol->section && bfd_is_com_section (symbol->section))
1449 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1451 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1452 bfd_fprintf_vma (abfd, file, val);
1454 /* If we have version information, print it. */
1455 if (elf_tdata (abfd)->dynversym_section != 0
1456 && (elf_tdata (abfd)->dynverdef_section != 0
1457 || elf_tdata (abfd)->dynverref_section != 0))
1459 unsigned int vernum;
1460 const char *version_string;
1462 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1465 version_string = "";
1466 else if (vernum == 1)
1467 version_string = "Base";
1468 else if (vernum <= elf_tdata (abfd)->cverdefs)
1470 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1473 Elf_Internal_Verneed *t;
1475 version_string = "";
1476 for (t = elf_tdata (abfd)->verref;
1480 Elf_Internal_Vernaux *a;
1482 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1484 if (a->vna_other == vernum)
1486 version_string = a->vna_nodename;
1493 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1494 fprintf (file, " %-11s", version_string);
1499 fprintf (file, " (%s)", version_string);
1500 for (i = 10 - strlen (version_string); i > 0; --i)
1505 /* If the st_other field is not zero, print it. */
1506 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1511 case STV_INTERNAL: fprintf (file, " .internal"); break;
1512 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1513 case STV_PROTECTED: fprintf (file, " .protected"); break;
1515 /* Some other non-defined flags are also present, so print
1517 fprintf (file, " 0x%02x", (unsigned int) st_other);
1520 fprintf (file, " %s", name);
1526 /* Allocate an ELF string table--force the first byte to be zero. */
1528 struct bfd_strtab_hash *
1529 _bfd_elf_stringtab_init (void)
1531 struct bfd_strtab_hash *ret;
1533 ret = _bfd_stringtab_init ();
1538 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1539 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1540 if (loc == (bfd_size_type) -1)
1542 _bfd_stringtab_free (ret);
1549 /* ELF .o/exec file reading */
1551 /* Create a new bfd section from an ELF section header. */
1554 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1556 Elf_Internal_Shdr *hdr;
1557 Elf_Internal_Ehdr *ehdr;
1558 const struct elf_backend_data *bed;
1561 if (shindex >= elf_numsections (abfd))
1564 hdr = elf_elfsections (abfd)[shindex];
1565 ehdr = elf_elfheader (abfd);
1566 name = bfd_elf_string_from_elf_section (abfd, ehdr->e_shstrndx,
1571 bed = get_elf_backend_data (abfd);
1572 switch (hdr->sh_type)
1575 /* Inactive section. Throw it away. */
1578 case SHT_PROGBITS: /* Normal section with contents. */
1579 case SHT_NOBITS: /* .bss section. */
1580 case SHT_HASH: /* .hash section. */
1581 case SHT_NOTE: /* .note section. */
1582 case SHT_INIT_ARRAY: /* .init_array section. */
1583 case SHT_FINI_ARRAY: /* .fini_array section. */
1584 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1585 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
1586 case SHT_GNU_HASH: /* .gnu.hash section. */
1587 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1589 case SHT_DYNAMIC: /* Dynamic linking information. */
1590 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1592 if (hdr->sh_link > elf_numsections (abfd))
1594 /* PR 10478: Accept Solaris binaries with a sh_link
1595 field set to SHN_BEFORE or SHN_AFTER. */
1596 switch (bfd_get_arch (abfd))
1599 case bfd_arch_sparc:
1600 if (hdr->sh_link == (SHN_LORESERVE & 0xffff) /* SHN_BEFORE */
1601 || hdr->sh_link == ((SHN_LORESERVE + 1) & 0xffff) /* SHN_AFTER */)
1603 /* Otherwise fall through. */
1608 else if (elf_elfsections (abfd)[hdr->sh_link] == NULL)
1610 else if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1612 Elf_Internal_Shdr *dynsymhdr;
1614 /* The shared libraries distributed with hpux11 have a bogus
1615 sh_link field for the ".dynamic" section. Find the
1616 string table for the ".dynsym" section instead. */
1617 if (elf_dynsymtab (abfd) != 0)
1619 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1620 hdr->sh_link = dynsymhdr->sh_link;
1624 unsigned int i, num_sec;
1626 num_sec = elf_numsections (abfd);
1627 for (i = 1; i < num_sec; i++)
1629 dynsymhdr = elf_elfsections (abfd)[i];
1630 if (dynsymhdr->sh_type == SHT_DYNSYM)
1632 hdr->sh_link = dynsymhdr->sh_link;
1640 case SHT_SYMTAB: /* A symbol table */
1641 if (elf_onesymtab (abfd) == shindex)
1644 if (hdr->sh_entsize != bed->s->sizeof_sym)
1646 if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size)
1648 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1649 elf_onesymtab (abfd) = shindex;
1650 elf_tdata (abfd)->symtab_hdr = *hdr;
1651 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1652 abfd->flags |= HAS_SYMS;
1654 /* Sometimes a shared object will map in the symbol table. If
1655 SHF_ALLOC is set, and this is a shared object, then we also
1656 treat this section as a BFD section. We can not base the
1657 decision purely on SHF_ALLOC, because that flag is sometimes
1658 set in a relocatable object file, which would confuse the
1660 if ((hdr->sh_flags & SHF_ALLOC) != 0
1661 && (abfd->flags & DYNAMIC) != 0
1662 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1666 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1667 can't read symbols without that section loaded as well. It
1668 is most likely specified by the next section header. */
1669 if (elf_elfsections (abfd)[elf_symtab_shndx (abfd)]->sh_link != shindex)
1671 unsigned int i, num_sec;
1673 num_sec = elf_numsections (abfd);
1674 for (i = shindex + 1; i < num_sec; i++)
1676 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1677 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1678 && hdr2->sh_link == shindex)
1682 for (i = 1; i < shindex; i++)
1684 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1685 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1686 && hdr2->sh_link == shindex)
1690 return bfd_section_from_shdr (abfd, i);
1694 case SHT_DYNSYM: /* A dynamic symbol table */
1695 if (elf_dynsymtab (abfd) == shindex)
1698 if (hdr->sh_entsize != bed->s->sizeof_sym)
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))
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 { STRING_COMMA_LEN (".debug"), 0, SHT_PROGBITS, 0 },
2065 { STRING_COMMA_LEN (".debug_line"), 0, SHT_PROGBITS, 0 },
2066 { STRING_COMMA_LEN (".debug_info"), 0, SHT_PROGBITS, 0 },
2067 { STRING_COMMA_LEN (".debug_abbrev"), 0, SHT_PROGBITS, 0 },
2068 { STRING_COMMA_LEN (".debug_aranges"), 0, SHT_PROGBITS, 0 },
2069 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, SHF_ALLOC },
2070 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, SHF_ALLOC },
2071 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, SHF_ALLOC },
2072 { NULL, 0, 0, 0, 0 }
2075 static const struct bfd_elf_special_section special_sections_f[] =
2077 { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2078 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2079 { NULL, 0, 0, 0, 0 }
2082 static const struct bfd_elf_special_section special_sections_g[] =
2084 { STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2085 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2086 { STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym, 0 },
2087 { STRING_COMMA_LEN (".gnu.version_d"), 0, SHT_GNU_verdef, 0 },
2088 { STRING_COMMA_LEN (".gnu.version_r"), 0, SHT_GNU_verneed, 0 },
2089 { STRING_COMMA_LEN (".gnu.liblist"), 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2090 { STRING_COMMA_LEN (".gnu.conflict"), 0, SHT_RELA, SHF_ALLOC },
2091 { STRING_COMMA_LEN (".gnu.hash"), 0, SHT_GNU_HASH, SHF_ALLOC },
2092 { NULL, 0, 0, 0, 0 }
2095 static const struct bfd_elf_special_section special_sections_h[] =
2097 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, SHF_ALLOC },
2098 { NULL, 0, 0, 0, 0 }
2101 static const struct bfd_elf_special_section special_sections_i[] =
2103 { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2104 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2105 { STRING_COMMA_LEN (".interp"), 0, SHT_PROGBITS, 0 },
2106 { NULL, 0, 0, 0, 0 }
2109 static const struct bfd_elf_special_section special_sections_l[] =
2111 { STRING_COMMA_LEN (".line"), 0, SHT_PROGBITS, 0 },
2112 { NULL, 0, 0, 0, 0 }
2115 static const struct bfd_elf_special_section special_sections_n[] =
2117 { STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS, 0 },
2118 { STRING_COMMA_LEN (".note"), -1, SHT_NOTE, 0 },
2119 { NULL, 0, 0, 0, 0 }
2122 static const struct bfd_elf_special_section special_sections_p[] =
2124 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2125 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2126 { NULL, 0, 0, 0, 0 }
2129 static const struct bfd_elf_special_section special_sections_r[] =
2131 { STRING_COMMA_LEN (".rodata"), -2, SHT_PROGBITS, SHF_ALLOC },
2132 { STRING_COMMA_LEN (".rodata1"), 0, SHT_PROGBITS, SHF_ALLOC },
2133 { STRING_COMMA_LEN (".rela"), -1, SHT_RELA, 0 },
2134 { STRING_COMMA_LEN (".rel"), -1, SHT_REL, 0 },
2135 { NULL, 0, 0, 0, 0 }
2138 static const struct bfd_elf_special_section special_sections_s[] =
2140 { STRING_COMMA_LEN (".shstrtab"), 0, SHT_STRTAB, 0 },
2141 { STRING_COMMA_LEN (".strtab"), 0, SHT_STRTAB, 0 },
2142 { STRING_COMMA_LEN (".symtab"), 0, SHT_SYMTAB, 0 },
2143 /* See struct bfd_elf_special_section declaration for the semantics of
2144 this special case where .prefix_length != strlen (.prefix). */
2145 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2146 { NULL, 0, 0, 0, 0 }
2149 static const struct bfd_elf_special_section special_sections_t[] =
2151 { STRING_COMMA_LEN (".text"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2152 { STRING_COMMA_LEN (".tbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2153 { STRING_COMMA_LEN (".tdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2154 { NULL, 0, 0, 0, 0 }
2157 static const struct bfd_elf_special_section special_sections_z[] =
2159 { STRING_COMMA_LEN (".zdebug_line"), 0, SHT_PROGBITS, 0 },
2160 { STRING_COMMA_LEN (".zdebug_info"), 0, SHT_PROGBITS, 0 },
2161 { STRING_COMMA_LEN (".zdebug_abbrev"), 0, SHT_PROGBITS, 0 },
2162 { STRING_COMMA_LEN (".zdebug_aranges"), 0, SHT_PROGBITS, 0 },
2163 { NULL, 0, 0, 0, 0 }
2166 static const struct bfd_elf_special_section *special_sections[] =
2168 special_sections_b, /* 'b' */
2169 special_sections_c, /* 'c' */
2170 special_sections_d, /* 'd' */
2172 special_sections_f, /* 'f' */
2173 special_sections_g, /* 'g' */
2174 special_sections_h, /* 'h' */
2175 special_sections_i, /* 'i' */
2178 special_sections_l, /* 'l' */
2180 special_sections_n, /* 'n' */
2182 special_sections_p, /* 'p' */
2184 special_sections_r, /* 'r' */
2185 special_sections_s, /* 's' */
2186 special_sections_t, /* 't' */
2192 special_sections_z /* 'z' */
2195 const struct bfd_elf_special_section *
2196 _bfd_elf_get_special_section (const char *name,
2197 const struct bfd_elf_special_section *spec,
2203 len = strlen (name);
2205 for (i = 0; spec[i].prefix != NULL; i++)
2208 int prefix_len = spec[i].prefix_length;
2210 if (len < prefix_len)
2212 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2215 suffix_len = spec[i].suffix_length;
2216 if (suffix_len <= 0)
2218 if (name[prefix_len] != 0)
2220 if (suffix_len == 0)
2222 if (name[prefix_len] != '.'
2223 && (suffix_len == -2
2224 || (rela && spec[i].type == SHT_REL)))
2230 if (len < prefix_len + suffix_len)
2232 if (memcmp (name + len - suffix_len,
2233 spec[i].prefix + prefix_len,
2243 const struct bfd_elf_special_section *
2244 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2247 const struct bfd_elf_special_section *spec;
2248 const struct elf_backend_data *bed;
2250 /* See if this is one of the special sections. */
2251 if (sec->name == NULL)
2254 bed = get_elf_backend_data (abfd);
2255 spec = bed->special_sections;
2258 spec = _bfd_elf_get_special_section (sec->name,
2259 bed->special_sections,
2265 if (sec->name[0] != '.')
2268 i = sec->name[1] - 'b';
2269 if (i < 0 || i > 'z' - 'b')
2272 spec = special_sections[i];
2277 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2281 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2283 struct bfd_elf_section_data *sdata;
2284 const struct elf_backend_data *bed;
2285 const struct bfd_elf_special_section *ssect;
2287 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2290 sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd,
2294 sec->used_by_bfd = sdata;
2297 /* Indicate whether or not this section should use RELA relocations. */
2298 bed = get_elf_backend_data (abfd);
2299 sec->use_rela_p = bed->default_use_rela_p;
2301 /* When we read a file, we don't need to set ELF section type and
2302 flags. They will be overridden in _bfd_elf_make_section_from_shdr
2303 anyway. We will set ELF section type and flags for all linker
2304 created sections. If user specifies BFD section flags, we will
2305 set ELF section type and flags based on BFD section flags in
2306 elf_fake_sections. */
2307 if ((!sec->flags && abfd->direction != read_direction)
2308 || (sec->flags & SEC_LINKER_CREATED) != 0)
2310 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2313 elf_section_type (sec) = ssect->type;
2314 elf_section_flags (sec) = ssect->attr;
2318 return _bfd_generic_new_section_hook (abfd, sec);
2321 /* Create a new bfd section from an ELF program header.
2323 Since program segments have no names, we generate a synthetic name
2324 of the form segment<NUM>, where NUM is generally the index in the
2325 program header table. For segments that are split (see below) we
2326 generate the names segment<NUM>a and segment<NUM>b.
2328 Note that some program segments may have a file size that is different than
2329 (less than) the memory size. All this means is that at execution the
2330 system must allocate the amount of memory specified by the memory size,
2331 but only initialize it with the first "file size" bytes read from the
2332 file. This would occur for example, with program segments consisting
2333 of combined data+bss.
2335 To handle the above situation, this routine generates TWO bfd sections
2336 for the single program segment. The first has the length specified by
2337 the file size of the segment, and the second has the length specified
2338 by the difference between the two sizes. In effect, the segment is split
2339 into its initialized and uninitialized parts.
2344 _bfd_elf_make_section_from_phdr (bfd *abfd,
2345 Elf_Internal_Phdr *hdr,
2347 const char *type_name)
2355 split = ((hdr->p_memsz > 0)
2356 && (hdr->p_filesz > 0)
2357 && (hdr->p_memsz > hdr->p_filesz));
2359 if (hdr->p_filesz > 0)
2361 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "a" : "");
2362 len = strlen (namebuf) + 1;
2363 name = (char *) bfd_alloc (abfd, len);
2366 memcpy (name, namebuf, len);
2367 newsect = bfd_make_section (abfd, name);
2368 if (newsect == NULL)
2370 newsect->vma = hdr->p_vaddr;
2371 newsect->lma = hdr->p_paddr;
2372 newsect->size = hdr->p_filesz;
2373 newsect->filepos = hdr->p_offset;
2374 newsect->flags |= SEC_HAS_CONTENTS;
2375 newsect->alignment_power = bfd_log2 (hdr->p_align);
2376 if (hdr->p_type == PT_LOAD)
2378 newsect->flags |= SEC_ALLOC;
2379 newsect->flags |= SEC_LOAD;
2380 if (hdr->p_flags & PF_X)
2382 /* FIXME: all we known is that it has execute PERMISSION,
2384 newsect->flags |= SEC_CODE;
2387 if (!(hdr->p_flags & PF_W))
2389 newsect->flags |= SEC_READONLY;
2393 if (hdr->p_memsz > hdr->p_filesz)
2397 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "b" : "");
2398 len = strlen (namebuf) + 1;
2399 name = (char *) bfd_alloc (abfd, len);
2402 memcpy (name, namebuf, len);
2403 newsect = bfd_make_section (abfd, name);
2404 if (newsect == NULL)
2406 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2407 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2408 newsect->size = hdr->p_memsz - hdr->p_filesz;
2409 newsect->filepos = hdr->p_offset + hdr->p_filesz;
2410 align = newsect->vma & -newsect->vma;
2411 if (align == 0 || align > hdr->p_align)
2412 align = hdr->p_align;
2413 newsect->alignment_power = bfd_log2 (align);
2414 if (hdr->p_type == PT_LOAD)
2416 /* Hack for gdb. Segments that have not been modified do
2417 not have their contents written to a core file, on the
2418 assumption that a debugger can find the contents in the
2419 executable. We flag this case by setting the fake
2420 section size to zero. Note that "real" bss sections will
2421 always have their contents dumped to the core file. */
2422 if (bfd_get_format (abfd) == bfd_core)
2424 newsect->flags |= SEC_ALLOC;
2425 if (hdr->p_flags & PF_X)
2426 newsect->flags |= SEC_CODE;
2428 if (!(hdr->p_flags & PF_W))
2429 newsect->flags |= SEC_READONLY;
2436 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int hdr_index)
2438 const struct elf_backend_data *bed;
2440 switch (hdr->p_type)
2443 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "null");
2446 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "load");
2449 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "dynamic");
2452 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "interp");
2455 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "note"))
2457 if (! elf_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2462 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "shlib");
2465 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "phdr");
2467 case PT_GNU_EH_FRAME:
2468 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index,
2472 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "stack");
2475 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "relro");
2478 /* Check for any processor-specific program segment types. */
2479 bed = get_elf_backend_data (abfd);
2480 return bed->elf_backend_section_from_phdr (abfd, hdr, hdr_index, "proc");
2484 /* Return the REL_HDR for SEC, assuming there is only a single one, either
2488 _bfd_elf_single_rel_hdr (asection *sec)
2490 if (elf_section_data (sec)->rel.hdr)
2492 BFD_ASSERT (elf_section_data (sec)->rela.hdr == NULL);
2493 return elf_section_data (sec)->rel.hdr;
2496 return elf_section_data (sec)->rela.hdr;
2499 /* Allocate and initialize a section-header for a new reloc section,
2500 containing relocations against ASECT. It is stored in RELDATA. If
2501 USE_RELA_P is TRUE, we use RELA relocations; otherwise, we use REL
2505 _bfd_elf_init_reloc_shdr (bfd *abfd,
2506 struct bfd_elf_section_reloc_data *reldata,
2508 bfd_boolean use_rela_p)
2510 Elf_Internal_Shdr *rel_hdr;
2512 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2515 amt = sizeof (Elf_Internal_Shdr);
2516 BFD_ASSERT (reldata->hdr == NULL);
2517 rel_hdr = bfd_zalloc (abfd, amt);
2518 reldata->hdr = rel_hdr;
2520 amt = sizeof ".rela" + strlen (asect->name);
2521 name = (char *) bfd_alloc (abfd, amt);
2524 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2526 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2528 if (rel_hdr->sh_name == (unsigned int) -1)
2530 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2531 rel_hdr->sh_entsize = (use_rela_p
2532 ? bed->s->sizeof_rela
2533 : bed->s->sizeof_rel);
2534 rel_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
2535 rel_hdr->sh_flags = 0;
2536 rel_hdr->sh_addr = 0;
2537 rel_hdr->sh_size = 0;
2538 rel_hdr->sh_offset = 0;
2543 /* Return the default section type based on the passed in section flags. */
2546 bfd_elf_get_default_section_type (flagword flags)
2548 if ((flags & SEC_ALLOC) != 0
2549 && (flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2551 return SHT_PROGBITS;
2554 struct fake_section_arg
2556 struct bfd_link_info *link_info;
2560 /* Set up an ELF internal section header for a section. */
2563 elf_fake_sections (bfd *abfd, asection *asect, void *fsarg)
2565 struct fake_section_arg *arg = (struct fake_section_arg *)fsarg;
2566 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2567 struct bfd_elf_section_data *esd = elf_section_data (asect);
2568 Elf_Internal_Shdr *this_hdr;
2569 unsigned int sh_type;
2573 /* We already failed; just get out of the bfd_map_over_sections
2578 this_hdr = &esd->this_hdr;
2580 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2581 asect->name, FALSE);
2582 if (this_hdr->sh_name == (unsigned int) -1)
2588 /* Don't clear sh_flags. Assembler may set additional bits. */
2590 if ((asect->flags & SEC_ALLOC) != 0
2591 || asect->user_set_vma)
2592 this_hdr->sh_addr = asect->vma;
2594 this_hdr->sh_addr = 0;
2596 this_hdr->sh_offset = 0;
2597 this_hdr->sh_size = asect->size;
2598 this_hdr->sh_link = 0;
2599 this_hdr->sh_addralign = (bfd_vma) 1 << asect->alignment_power;
2600 /* The sh_entsize and sh_info fields may have been set already by
2601 copy_private_section_data. */
2603 this_hdr->bfd_section = asect;
2604 this_hdr->contents = NULL;
2606 /* If the section type is unspecified, we set it based on
2608 if ((asect->flags & SEC_GROUP) != 0)
2609 sh_type = SHT_GROUP;
2611 sh_type = bfd_elf_get_default_section_type (asect->flags);
2613 if (this_hdr->sh_type == SHT_NULL)
2614 this_hdr->sh_type = sh_type;
2615 else if (this_hdr->sh_type == SHT_NOBITS
2616 && sh_type == SHT_PROGBITS
2617 && (asect->flags & SEC_ALLOC) != 0)
2619 /* Warn if we are changing a NOBITS section to PROGBITS, but
2620 allow the link to proceed. This can happen when users link
2621 non-bss input sections to bss output sections, or emit data
2622 to a bss output section via a linker script. */
2623 (*_bfd_error_handler)
2624 (_("warning: section `%A' type changed to PROGBITS"), asect);
2625 this_hdr->sh_type = sh_type;
2628 switch (this_hdr->sh_type)
2634 case SHT_INIT_ARRAY:
2635 case SHT_FINI_ARRAY:
2636 case SHT_PREINIT_ARRAY:
2643 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2647 this_hdr->sh_entsize = bed->s->sizeof_sym;
2651 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2655 if (get_elf_backend_data (abfd)->may_use_rela_p)
2656 this_hdr->sh_entsize = bed->s->sizeof_rela;
2660 if (get_elf_backend_data (abfd)->may_use_rel_p)
2661 this_hdr->sh_entsize = bed->s->sizeof_rel;
2664 case SHT_GNU_versym:
2665 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2668 case SHT_GNU_verdef:
2669 this_hdr->sh_entsize = 0;
2670 /* objcopy or strip will copy over sh_info, but may not set
2671 cverdefs. The linker will set cverdefs, but sh_info will be
2673 if (this_hdr->sh_info == 0)
2674 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2676 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2677 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2680 case SHT_GNU_verneed:
2681 this_hdr->sh_entsize = 0;
2682 /* objcopy or strip will copy over sh_info, but may not set
2683 cverrefs. The linker will set cverrefs, but sh_info will be
2685 if (this_hdr->sh_info == 0)
2686 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2688 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2689 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2693 this_hdr->sh_entsize = GRP_ENTRY_SIZE;
2697 this_hdr->sh_entsize = bed->s->arch_size == 64 ? 0 : 4;
2701 if ((asect->flags & SEC_ALLOC) != 0)
2702 this_hdr->sh_flags |= SHF_ALLOC;
2703 if ((asect->flags & SEC_READONLY) == 0)
2704 this_hdr->sh_flags |= SHF_WRITE;
2705 if ((asect->flags & SEC_CODE) != 0)
2706 this_hdr->sh_flags |= SHF_EXECINSTR;
2707 if ((asect->flags & SEC_MERGE) != 0)
2709 this_hdr->sh_flags |= SHF_MERGE;
2710 this_hdr->sh_entsize = asect->entsize;
2711 if ((asect->flags & SEC_STRINGS) != 0)
2712 this_hdr->sh_flags |= SHF_STRINGS;
2714 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2715 this_hdr->sh_flags |= SHF_GROUP;
2716 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2718 this_hdr->sh_flags |= SHF_TLS;
2719 if (asect->size == 0
2720 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2722 struct bfd_link_order *o = asect->map_tail.link_order;
2724 this_hdr->sh_size = 0;
2727 this_hdr->sh_size = o->offset + o->size;
2728 if (this_hdr->sh_size != 0)
2729 this_hdr->sh_type = SHT_NOBITS;
2733 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
2734 this_hdr->sh_flags |= SHF_EXCLUDE;
2736 /* If the section has relocs, set up a section header for the
2737 SHT_REL[A] section. If two relocation sections are required for
2738 this section, it is up to the processor-specific back-end to
2739 create the other. */
2740 if ((asect->flags & SEC_RELOC) != 0)
2742 /* When doing a relocatable link, create both REL and RELA sections if
2745 /* Do the normal setup if we wouldn't create any sections here. */
2746 && esd->rel.count + esd->rela.count > 0
2747 && (arg->link_info->relocatable || arg->link_info->emitrelocations))
2749 if (esd->rel.count && esd->rel.hdr == NULL
2750 && !_bfd_elf_init_reloc_shdr (abfd, &esd->rel, asect, FALSE))
2755 if (esd->rela.count && esd->rela.hdr == NULL
2756 && !_bfd_elf_init_reloc_shdr (abfd, &esd->rela, asect, TRUE))
2762 else if (!_bfd_elf_init_reloc_shdr (abfd,
2764 ? &esd->rela : &esd->rel),
2770 /* Check for processor-specific section types. */
2771 sh_type = this_hdr->sh_type;
2772 if (bed->elf_backend_fake_sections
2773 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2776 if (sh_type == SHT_NOBITS && asect->size != 0)
2778 /* Don't change the header type from NOBITS if we are being
2779 called for objcopy --only-keep-debug. */
2780 this_hdr->sh_type = sh_type;
2784 /* Fill in the contents of a SHT_GROUP section. Called from
2785 _bfd_elf_compute_section_file_positions for gas, objcopy, and
2786 when ELF targets use the generic linker, ld. Called for ld -r
2787 from bfd_elf_final_link. */
2790 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2792 bfd_boolean *failedptr = (bfd_boolean *) failedptrarg;
2793 asection *elt, *first;
2797 /* Ignore linker created group section. See elfNN_ia64_object_p in
2799 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2803 if (elf_section_data (sec)->this_hdr.sh_info == 0)
2805 unsigned long symindx = 0;
2807 /* elf_group_id will have been set up by objcopy and the
2809 if (elf_group_id (sec) != NULL)
2810 symindx = elf_group_id (sec)->udata.i;
2814 /* If called from the assembler, swap_out_syms will have set up
2815 elf_section_syms. */
2816 BFD_ASSERT (elf_section_syms (abfd) != NULL);
2817 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2819 elf_section_data (sec)->this_hdr.sh_info = symindx;
2821 else if (elf_section_data (sec)->this_hdr.sh_info == (unsigned int) -2)
2823 /* The ELF backend linker sets sh_info to -2 when the group
2824 signature symbol is global, and thus the index can't be
2825 set until all local symbols are output. */
2826 asection *igroup = elf_sec_group (elf_next_in_group (sec));
2827 struct bfd_elf_section_data *sec_data = elf_section_data (igroup);
2828 unsigned long symndx = sec_data->this_hdr.sh_info;
2829 unsigned long extsymoff = 0;
2830 struct elf_link_hash_entry *h;
2832 if (!elf_bad_symtab (igroup->owner))
2834 Elf_Internal_Shdr *symtab_hdr;
2836 symtab_hdr = &elf_tdata (igroup->owner)->symtab_hdr;
2837 extsymoff = symtab_hdr->sh_info;
2839 h = elf_sym_hashes (igroup->owner)[symndx - extsymoff];
2840 while (h->root.type == bfd_link_hash_indirect
2841 || h->root.type == bfd_link_hash_warning)
2842 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2844 elf_section_data (sec)->this_hdr.sh_info = h->indx;
2847 /* The contents won't be allocated for "ld -r" or objcopy. */
2849 if (sec->contents == NULL)
2852 sec->contents = (unsigned char *) bfd_alloc (abfd, sec->size);
2854 /* Arrange for the section to be written out. */
2855 elf_section_data (sec)->this_hdr.contents = sec->contents;
2856 if (sec->contents == NULL)
2863 loc = sec->contents + sec->size;
2865 /* Get the pointer to the first section in the group that gas
2866 squirreled away here. objcopy arranges for this to be set to the
2867 start of the input section group. */
2868 first = elt = elf_next_in_group (sec);
2870 /* First element is a flag word. Rest of section is elf section
2871 indices for all the sections of the group. Write them backwards
2872 just to keep the group in the same order as given in .section
2873 directives, not that it matters. */
2880 s = s->output_section;
2882 && !bfd_is_abs_section (s))
2884 unsigned int idx = elf_section_data (s)->this_idx;
2887 H_PUT_32 (abfd, idx, loc);
2889 elt = elf_next_in_group (elt);
2894 if ((loc -= 4) != sec->contents)
2897 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2900 /* Assign all ELF section numbers. The dummy first section is handled here
2901 too. The link/info pointers for the standard section types are filled
2902 in here too, while we're at it. */
2905 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
2907 struct elf_obj_tdata *t = elf_tdata (abfd);
2909 unsigned int section_number, secn;
2910 Elf_Internal_Shdr **i_shdrp;
2911 struct bfd_elf_section_data *d;
2912 bfd_boolean need_symtab;
2916 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2918 /* SHT_GROUP sections are in relocatable files only. */
2919 if (link_info == NULL || link_info->relocatable)
2921 /* Put SHT_GROUP sections first. */
2922 for (sec = abfd->sections; sec != NULL; sec = sec->next)
2924 d = elf_section_data (sec);
2926 if (d->this_hdr.sh_type == SHT_GROUP)
2928 if (sec->flags & SEC_LINKER_CREATED)
2930 /* Remove the linker created SHT_GROUP sections. */
2931 bfd_section_list_remove (abfd, sec);
2932 abfd->section_count--;
2935 d->this_idx = section_number++;
2940 for (sec = abfd->sections; sec; sec = sec->next)
2942 d = elf_section_data (sec);
2944 if (d->this_hdr.sh_type != SHT_GROUP)
2945 d->this_idx = section_number++;
2946 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2949 d->rel.idx = section_number++;
2950 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel.hdr->sh_name);
2957 d->rela.idx = section_number++;
2958 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rela.hdr->sh_name);
2964 t->shstrtab_section = section_number++;
2965 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2966 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2968 need_symtab = (bfd_get_symcount (abfd) > 0
2969 || (link_info == NULL
2970 && ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
2974 t->symtab_section = section_number++;
2975 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2976 if (section_number > ((SHN_LORESERVE - 2) & 0xFFFF))
2978 t->symtab_shndx_section = section_number++;
2979 t->symtab_shndx_hdr.sh_name
2980 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2981 ".symtab_shndx", FALSE);
2982 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2985 t->strtab_section = section_number++;
2986 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2989 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2990 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2992 elf_numsections (abfd) = section_number;
2993 elf_elfheader (abfd)->e_shnum = section_number;
2995 /* Set up the list of section header pointers, in agreement with the
2997 i_shdrp = (Elf_Internal_Shdr **) bfd_zalloc2 (abfd, section_number,
2998 sizeof (Elf_Internal_Shdr *));
2999 if (i_shdrp == NULL)
3002 i_shdrp[0] = (Elf_Internal_Shdr *) bfd_zalloc (abfd,
3003 sizeof (Elf_Internal_Shdr));
3004 if (i_shdrp[0] == NULL)
3006 bfd_release (abfd, i_shdrp);
3010 elf_elfsections (abfd) = i_shdrp;
3012 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
3015 i_shdrp[t->symtab_section] = &t->symtab_hdr;
3016 if (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF))
3018 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
3019 t->symtab_shndx_hdr.sh_link = t->symtab_section;
3021 i_shdrp[t->strtab_section] = &t->strtab_hdr;
3022 t->symtab_hdr.sh_link = t->strtab_section;
3025 for (sec = abfd->sections; sec; sec = sec->next)
3030 d = elf_section_data (sec);
3032 i_shdrp[d->this_idx] = &d->this_hdr;
3033 if (d->rel.idx != 0)
3034 i_shdrp[d->rel.idx] = d->rel.hdr;
3035 if (d->rela.idx != 0)
3036 i_shdrp[d->rela.idx] = d->rela.hdr;
3038 /* Fill in the sh_link and sh_info fields while we're at it. */
3040 /* sh_link of a reloc section is the section index of the symbol
3041 table. sh_info is the section index of the section to which
3042 the relocation entries apply. */
3043 if (d->rel.idx != 0)
3045 d->rel.hdr->sh_link = t->symtab_section;
3046 d->rel.hdr->sh_info = d->this_idx;
3048 if (d->rela.idx != 0)
3050 d->rela.hdr->sh_link = t->symtab_section;
3051 d->rela.hdr->sh_info = d->this_idx;
3054 /* We need to set up sh_link for SHF_LINK_ORDER. */
3055 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
3057 s = elf_linked_to_section (sec);
3060 /* elf_linked_to_section points to the input section. */
3061 if (link_info != NULL)
3063 /* Check discarded linkonce section. */
3064 if (elf_discarded_section (s))
3067 (*_bfd_error_handler)
3068 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
3069 abfd, d->this_hdr.bfd_section,
3071 /* Point to the kept section if it has the same
3072 size as the discarded one. */
3073 kept = _bfd_elf_check_kept_section (s, link_info);
3076 bfd_set_error (bfd_error_bad_value);
3082 s = s->output_section;
3083 BFD_ASSERT (s != NULL);
3087 /* Handle objcopy. */
3088 if (s->output_section == NULL)
3090 (*_bfd_error_handler)
3091 (_("%B: sh_link of section `%A' points to removed section `%A' of `%B'"),
3092 abfd, d->this_hdr.bfd_section, s, s->owner);
3093 bfd_set_error (bfd_error_bad_value);
3096 s = s->output_section;
3098 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3103 The Intel C compiler generates SHT_IA_64_UNWIND with
3104 SHF_LINK_ORDER. But it doesn't set the sh_link or
3105 sh_info fields. Hence we could get the situation
3107 const struct elf_backend_data *bed
3108 = get_elf_backend_data (abfd);
3109 if (bed->link_order_error_handler)
3110 bed->link_order_error_handler
3111 (_("%B: warning: sh_link not set for section `%A'"),
3116 switch (d->this_hdr.sh_type)
3120 /* A reloc section which we are treating as a normal BFD
3121 section. sh_link is the section index of the symbol
3122 table. sh_info is the section index of the section to
3123 which the relocation entries apply. We assume that an
3124 allocated reloc section uses the dynamic symbol table.
3125 FIXME: How can we be sure? */
3126 s = bfd_get_section_by_name (abfd, ".dynsym");
3128 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3130 /* We look up the section the relocs apply to by name. */
3132 if (d->this_hdr.sh_type == SHT_REL)
3136 s = bfd_get_section_by_name (abfd, name);
3138 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3142 /* We assume that a section named .stab*str is a stabs
3143 string section. We look for a section with the same name
3144 but without the trailing ``str'', and set its sh_link
3145 field to point to this section. */
3146 if (CONST_STRNEQ (sec->name, ".stab")
3147 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3152 len = strlen (sec->name);
3153 alc = (char *) bfd_malloc (len - 2);
3156 memcpy (alc, sec->name, len - 3);
3157 alc[len - 3] = '\0';
3158 s = bfd_get_section_by_name (abfd, alc);
3162 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3164 /* This is a .stab section. */
3165 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3166 elf_section_data (s)->this_hdr.sh_entsize
3167 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3174 case SHT_GNU_verneed:
3175 case SHT_GNU_verdef:
3176 /* sh_link is the section header index of the string table
3177 used for the dynamic entries, or the symbol table, or the
3179 s = bfd_get_section_by_name (abfd, ".dynstr");
3181 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3184 case SHT_GNU_LIBLIST:
3185 /* sh_link is the section header index of the prelink library
3186 list used for the dynamic entries, or the symbol table, or
3187 the version strings. */
3188 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3189 ? ".dynstr" : ".gnu.libstr");
3191 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3196 case SHT_GNU_versym:
3197 /* sh_link is the section header index of the symbol table
3198 this hash table or version table is for. */
3199 s = bfd_get_section_by_name (abfd, ".dynsym");
3201 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3205 d->this_hdr.sh_link = t->symtab_section;
3209 for (secn = 1; secn < section_number; ++secn)
3210 if (i_shdrp[secn] == NULL)
3211 i_shdrp[secn] = i_shdrp[0];
3213 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3214 i_shdrp[secn]->sh_name);
3218 /* Map symbol from it's internal number to the external number, moving
3219 all local symbols to be at the head of the list. */
3222 sym_is_global (bfd *abfd, asymbol *sym)
3224 /* If the backend has a special mapping, use it. */
3225 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3226 if (bed->elf_backend_sym_is_global)
3227 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3229 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK | BSF_GNU_UNIQUE)) != 0
3230 || bfd_is_und_section (bfd_get_section (sym))
3231 || bfd_is_com_section (bfd_get_section (sym)));
3234 /* Don't output section symbols for sections that are not going to be
3238 ignore_section_sym (bfd *abfd, asymbol *sym)
3240 return ((sym->flags & BSF_SECTION_SYM) != 0
3241 && !(sym->section->owner == abfd
3242 || (sym->section->output_section->owner == abfd
3243 && sym->section->output_offset == 0)));
3247 elf_map_symbols (bfd *abfd)
3249 unsigned int symcount = bfd_get_symcount (abfd);
3250 asymbol **syms = bfd_get_outsymbols (abfd);
3251 asymbol **sect_syms;
3252 unsigned int num_locals = 0;
3253 unsigned int num_globals = 0;
3254 unsigned int num_locals2 = 0;
3255 unsigned int num_globals2 = 0;
3262 fprintf (stderr, "elf_map_symbols\n");
3266 for (asect = abfd->sections; asect; asect = asect->next)
3268 if (max_index < asect->index)
3269 max_index = asect->index;
3273 sect_syms = (asymbol **) bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
3274 if (sect_syms == NULL)
3276 elf_section_syms (abfd) = sect_syms;
3277 elf_num_section_syms (abfd) = max_index;
3279 /* Init sect_syms entries for any section symbols we have already
3280 decided to output. */
3281 for (idx = 0; idx < symcount; idx++)
3283 asymbol *sym = syms[idx];
3285 if ((sym->flags & BSF_SECTION_SYM) != 0
3287 && !ignore_section_sym (abfd, sym))
3289 asection *sec = sym->section;
3291 if (sec->owner != abfd)
3292 sec = sec->output_section;
3294 sect_syms[sec->index] = syms[idx];
3298 /* Classify all of the symbols. */
3299 for (idx = 0; idx < symcount; idx++)
3301 if (ignore_section_sym (abfd, syms[idx]))
3303 if (!sym_is_global (abfd, syms[idx]))
3309 /* We will be adding a section symbol for each normal BFD section. Most
3310 sections will already have a section symbol in outsymbols, but
3311 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3312 at least in that case. */
3313 for (asect = abfd->sections; asect; asect = asect->next)
3315 if (sect_syms[asect->index] == NULL)
3317 if (!sym_is_global (abfd, asect->symbol))
3324 /* Now sort the symbols so the local symbols are first. */
3325 new_syms = (asymbol **) bfd_alloc2 (abfd, num_locals + num_globals,
3326 sizeof (asymbol *));
3328 if (new_syms == NULL)
3331 for (idx = 0; idx < symcount; idx++)
3333 asymbol *sym = syms[idx];
3336 if (ignore_section_sym (abfd, sym))
3338 if (!sym_is_global (abfd, sym))
3341 i = num_locals + num_globals2++;
3343 sym->udata.i = i + 1;
3345 for (asect = abfd->sections; asect; asect = asect->next)
3347 if (sect_syms[asect->index] == NULL)
3349 asymbol *sym = asect->symbol;
3352 sect_syms[asect->index] = sym;
3353 if (!sym_is_global (abfd, sym))
3356 i = num_locals + num_globals2++;
3358 sym->udata.i = i + 1;
3362 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3364 elf_num_locals (abfd) = num_locals;
3365 elf_num_globals (abfd) = num_globals;
3369 /* Align to the maximum file alignment that could be required for any
3370 ELF data structure. */
3372 static inline file_ptr
3373 align_file_position (file_ptr off, int align)
3375 return (off + align - 1) & ~(align - 1);
3378 /* Assign a file position to a section, optionally aligning to the
3379 required section alignment. */
3382 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3386 if (align && i_shdrp->sh_addralign > 1)
3387 offset = BFD_ALIGN (offset, i_shdrp->sh_addralign);
3388 i_shdrp->sh_offset = offset;
3389 if (i_shdrp->bfd_section != NULL)
3390 i_shdrp->bfd_section->filepos = offset;
3391 if (i_shdrp->sh_type != SHT_NOBITS)
3392 offset += i_shdrp->sh_size;
3396 /* Compute the file positions we are going to put the sections at, and
3397 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3398 is not NULL, this is being called by the ELF backend linker. */
3401 _bfd_elf_compute_section_file_positions (bfd *abfd,
3402 struct bfd_link_info *link_info)
3404 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3405 struct fake_section_arg fsargs;
3407 struct bfd_strtab_hash *strtab = NULL;
3408 Elf_Internal_Shdr *shstrtab_hdr;
3409 bfd_boolean need_symtab;
3411 if (abfd->output_has_begun)
3414 /* Do any elf backend specific processing first. */
3415 if (bed->elf_backend_begin_write_processing)
3416 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3418 if (! prep_headers (abfd))
3421 /* Post process the headers if necessary. */
3422 if (bed->elf_backend_post_process_headers)
3423 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3425 fsargs.failed = FALSE;
3426 fsargs.link_info = link_info;
3427 bfd_map_over_sections (abfd, elf_fake_sections, &fsargs);
3431 if (!assign_section_numbers (abfd, link_info))
3434 /* The backend linker builds symbol table information itself. */
3435 need_symtab = (link_info == NULL
3436 && (bfd_get_symcount (abfd) > 0
3437 || ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
3441 /* Non-zero if doing a relocatable link. */
3442 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3444 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3449 if (link_info == NULL)
3451 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3456 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3457 /* sh_name was set in prep_headers. */
3458 shstrtab_hdr->sh_type = SHT_STRTAB;
3459 shstrtab_hdr->sh_flags = 0;
3460 shstrtab_hdr->sh_addr = 0;
3461 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3462 shstrtab_hdr->sh_entsize = 0;
3463 shstrtab_hdr->sh_link = 0;
3464 shstrtab_hdr->sh_info = 0;
3465 /* sh_offset is set in assign_file_positions_except_relocs. */
3466 shstrtab_hdr->sh_addralign = 1;
3468 if (!assign_file_positions_except_relocs (abfd, link_info))
3474 Elf_Internal_Shdr *hdr;
3476 off = elf_tdata (abfd)->next_file_pos;
3478 hdr = &elf_tdata (abfd)->symtab_hdr;
3479 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3481 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3482 if (hdr->sh_size != 0)
3483 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3485 hdr = &elf_tdata (abfd)->strtab_hdr;
3486 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3488 elf_tdata (abfd)->next_file_pos = off;
3490 /* Now that we know where the .strtab section goes, write it
3492 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3493 || ! _bfd_stringtab_emit (abfd, strtab))
3495 _bfd_stringtab_free (strtab);
3498 abfd->output_has_begun = TRUE;
3503 /* Make an initial estimate of the size of the program header. If we
3504 get the number wrong here, we'll redo section placement. */
3506 static bfd_size_type
3507 get_program_header_size (bfd *abfd, struct bfd_link_info *info)
3511 const struct elf_backend_data *bed;
3513 /* Assume we will need exactly two PT_LOAD segments: one for text
3514 and one for data. */
3517 s = bfd_get_section_by_name (abfd, ".interp");
3518 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3520 /* If we have a loadable interpreter section, we need a
3521 PT_INTERP segment. In this case, assume we also need a
3522 PT_PHDR segment, although that may not be true for all
3527 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
3529 /* We need a PT_DYNAMIC segment. */
3533 if (info != NULL && info->relro)
3535 /* We need a PT_GNU_RELRO segment. */
3539 if (elf_tdata (abfd)->eh_frame_hdr)
3541 /* We need a PT_GNU_EH_FRAME segment. */
3545 if (elf_tdata (abfd)->stack_flags)
3547 /* We need a PT_GNU_STACK segment. */
3551 for (s = abfd->sections; s != NULL; s = s->next)
3553 if ((s->flags & SEC_LOAD) != 0
3554 && CONST_STRNEQ (s->name, ".note"))
3556 /* We need a PT_NOTE segment. */
3558 /* Try to create just one PT_NOTE segment
3559 for all adjacent loadable .note* sections.
3560 gABI requires that within a PT_NOTE segment
3561 (and also inside of each SHT_NOTE section)
3562 each note is padded to a multiple of 4 size,
3563 so we check whether the sections are correctly
3565 if (s->alignment_power == 2)
3566 while (s->next != NULL
3567 && s->next->alignment_power == 2
3568 && (s->next->flags & SEC_LOAD) != 0
3569 && CONST_STRNEQ (s->next->name, ".note"))
3574 for (s = abfd->sections; s != NULL; s = s->next)
3576 if (s->flags & SEC_THREAD_LOCAL)
3578 /* We need a PT_TLS segment. */
3584 /* Let the backend count up any program headers it might need. */
3585 bed = get_elf_backend_data (abfd);
3586 if (bed->elf_backend_additional_program_headers)
3590 a = (*bed->elf_backend_additional_program_headers) (abfd, info);
3596 return segs * bed->s->sizeof_phdr;
3599 /* Find the segment that contains the output_section of section. */
3602 _bfd_elf_find_segment_containing_section (bfd * abfd, asection * section)
3604 struct elf_segment_map *m;
3605 Elf_Internal_Phdr *p;
3607 for (m = elf_tdata (abfd)->segment_map,
3608 p = elf_tdata (abfd)->phdr;
3614 for (i = m->count - 1; i >= 0; i--)
3615 if (m->sections[i] == section)
3622 /* Create a mapping from a set of sections to a program segment. */
3624 static struct elf_segment_map *
3625 make_mapping (bfd *abfd,
3626 asection **sections,
3631 struct elf_segment_map *m;
3636 amt = sizeof (struct elf_segment_map);
3637 amt += (to - from - 1) * sizeof (asection *);
3638 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3642 m->p_type = PT_LOAD;
3643 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3644 m->sections[i - from] = *hdrpp;
3645 m->count = to - from;
3647 if (from == 0 && phdr)
3649 /* Include the headers in the first PT_LOAD segment. */
3650 m->includes_filehdr = 1;
3651 m->includes_phdrs = 1;
3657 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3660 struct elf_segment_map *
3661 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3663 struct elf_segment_map *m;
3665 m = (struct elf_segment_map *) bfd_zalloc (abfd,
3666 sizeof (struct elf_segment_map));
3670 m->p_type = PT_DYNAMIC;
3672 m->sections[0] = dynsec;
3677 /* Possibly add or remove segments from the segment map. */
3680 elf_modify_segment_map (bfd *abfd,
3681 struct bfd_link_info *info,
3682 bfd_boolean remove_empty_load)
3684 struct elf_segment_map **m;
3685 const struct elf_backend_data *bed;
3687 /* The placement algorithm assumes that non allocated sections are
3688 not in PT_LOAD segments. We ensure this here by removing such
3689 sections from the segment map. We also remove excluded
3690 sections. Finally, any PT_LOAD segment without sections is
3692 m = &elf_tdata (abfd)->segment_map;
3695 unsigned int i, new_count;
3697 for (new_count = 0, i = 0; i < (*m)->count; i++)
3699 if (((*m)->sections[i]->flags & SEC_EXCLUDE) == 0
3700 && (((*m)->sections[i]->flags & SEC_ALLOC) != 0
3701 || (*m)->p_type != PT_LOAD))
3703 (*m)->sections[new_count] = (*m)->sections[i];
3707 (*m)->count = new_count;
3709 if (remove_empty_load && (*m)->p_type == PT_LOAD && (*m)->count == 0)
3715 bed = get_elf_backend_data (abfd);
3716 if (bed->elf_backend_modify_segment_map != NULL)
3718 if (!(*bed->elf_backend_modify_segment_map) (abfd, info))
3725 /* Set up a mapping from BFD sections to program segments. */
3728 _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
3731 struct elf_segment_map *m;
3732 asection **sections = NULL;
3733 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3734 bfd_boolean no_user_phdrs;
3736 no_user_phdrs = elf_tdata (abfd)->segment_map == NULL;
3737 if (no_user_phdrs && bfd_count_sections (abfd) != 0)
3741 struct elf_segment_map *mfirst;
3742 struct elf_segment_map **pm;
3745 unsigned int phdr_index;
3746 bfd_vma maxpagesize;
3748 bfd_boolean phdr_in_segment = TRUE;
3749 bfd_boolean writable;
3751 asection *first_tls = NULL;
3752 asection *dynsec, *eh_frame_hdr;
3754 bfd_vma addr_mask, wrap_to = 0;
3756 /* Select the allocated sections, and sort them. */
3758 sections = (asection **) bfd_malloc2 (bfd_count_sections (abfd),
3759 sizeof (asection *));
3760 if (sections == NULL)
3763 /* Calculate top address, avoiding undefined behaviour of shift
3764 left operator when shift count is equal to size of type
3766 addr_mask = ((bfd_vma) 1 << (bfd_arch_bits_per_address (abfd) - 1)) - 1;
3767 addr_mask = (addr_mask << 1) + 1;
3770 for (s = abfd->sections; s != NULL; s = s->next)
3772 if ((s->flags & SEC_ALLOC) != 0)
3776 /* A wrapping section potentially clashes with header. */
3777 if (((s->lma + s->size) & addr_mask) < (s->lma & addr_mask))
3778 wrap_to = (s->lma + s->size) & addr_mask;
3781 BFD_ASSERT (i <= bfd_count_sections (abfd));
3784 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3786 /* Build the mapping. */
3791 /* If we have a .interp section, then create a PT_PHDR segment for
3792 the program headers and a PT_INTERP segment for the .interp
3794 s = bfd_get_section_by_name (abfd, ".interp");
3795 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3797 amt = sizeof (struct elf_segment_map);
3798 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3802 m->p_type = PT_PHDR;
3803 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3804 m->p_flags = PF_R | PF_X;
3805 m->p_flags_valid = 1;
3806 m->includes_phdrs = 1;
3811 amt = sizeof (struct elf_segment_map);
3812 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3816 m->p_type = PT_INTERP;
3824 /* Look through the sections. We put sections in the same program
3825 segment when the start of the second section can be placed within
3826 a few bytes of the end of the first section. */
3830 maxpagesize = bed->maxpagesize;
3832 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3834 && (dynsec->flags & SEC_LOAD) == 0)
3837 /* Deal with -Ttext or something similar such that the first section
3838 is not adjacent to the program headers. This is an
3839 approximation, since at this point we don't know exactly how many
3840 program headers we will need. */
3843 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
3845 if (phdr_size == (bfd_size_type) -1)
3846 phdr_size = get_program_header_size (abfd, info);
3847 if ((abfd->flags & D_PAGED) == 0
3848 || (sections[0]->lma & addr_mask) < phdr_size
3849 || ((sections[0]->lma & addr_mask) % maxpagesize
3850 < phdr_size % maxpagesize)
3851 || (sections[0]->lma & addr_mask & -maxpagesize) < wrap_to)
3852 phdr_in_segment = FALSE;
3855 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3858 bfd_boolean new_segment;
3862 /* See if this section and the last one will fit in the same
3865 if (last_hdr == NULL)
3867 /* If we don't have a segment yet, then we don't need a new
3868 one (we build the last one after this loop). */
3869 new_segment = FALSE;
3871 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3873 /* If this section has a different relation between the
3874 virtual address and the load address, then we need a new
3878 else if (hdr->lma < last_hdr->lma + last_size
3879 || last_hdr->lma + last_size < last_hdr->lma)
3881 /* If this section has a load address that makes it overlap
3882 the previous section, then we need a new segment. */
3885 /* In the next test we have to be careful when last_hdr->lma is close
3886 to the end of the address space. If the aligned address wraps
3887 around to the start of the address space, then there are no more
3888 pages left in memory and it is OK to assume that the current
3889 section can be included in the current segment. */
3890 else if ((BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
3892 && (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
3895 /* If putting this section in this segment would force us to
3896 skip a page in the segment, then we need a new segment. */
3899 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3900 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3902 /* We don't want to put a loadable section after a
3903 nonloadable section in the same segment.
3904 Consider .tbss sections as loadable for this purpose. */
3907 else if ((abfd->flags & D_PAGED) == 0)
3909 /* If the file is not demand paged, which means that we
3910 don't require the sections to be correctly aligned in the
3911 file, then there is no other reason for a new segment. */
3912 new_segment = FALSE;
3915 && (hdr->flags & SEC_READONLY) == 0
3916 && (((last_hdr->lma + last_size - 1) & -maxpagesize)
3917 != (hdr->lma & -maxpagesize)))
3919 /* We don't want to put a writable section in a read only
3920 segment, unless they are on the same page in memory
3921 anyhow. We already know that the last section does not
3922 bring us past the current section on the page, so the
3923 only case in which the new section is not on the same
3924 page as the previous section is when the previous section
3925 ends precisely on a page boundary. */
3930 /* Otherwise, we can use the same segment. */
3931 new_segment = FALSE;
3934 /* Allow interested parties a chance to override our decision. */
3935 if (last_hdr != NULL
3937 && info->callbacks->override_segment_assignment != NULL)
3939 = info->callbacks->override_segment_assignment (info, abfd, hdr,
3945 if ((hdr->flags & SEC_READONLY) == 0)
3948 /* .tbss sections effectively have zero size. */
3949 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
3950 != SEC_THREAD_LOCAL)
3951 last_size = hdr->size;
3957 /* We need a new program segment. We must create a new program
3958 header holding all the sections from phdr_index until hdr. */
3960 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3967 if ((hdr->flags & SEC_READONLY) == 0)
3973 /* .tbss sections effectively have zero size. */
3974 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3975 last_size = hdr->size;
3979 phdr_in_segment = FALSE;
3982 /* Create a final PT_LOAD program segment. */
3983 if (last_hdr != NULL)
3985 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3993 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3996 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
4003 /* For each batch of consecutive loadable .note sections,
4004 add a PT_NOTE segment. We don't use bfd_get_section_by_name,
4005 because if we link together nonloadable .note sections and
4006 loadable .note sections, we will generate two .note sections
4007 in the output file. FIXME: Using names for section types is
4009 for (s = abfd->sections; s != NULL; s = s->next)
4011 if ((s->flags & SEC_LOAD) != 0
4012 && CONST_STRNEQ (s->name, ".note"))
4017 amt = sizeof (struct elf_segment_map);
4018 if (s->alignment_power == 2)
4019 for (s2 = s; s2->next != NULL; s2 = s2->next)
4021 if (s2->next->alignment_power == 2
4022 && (s2->next->flags & SEC_LOAD) != 0
4023 && CONST_STRNEQ (s2->next->name, ".note")
4024 && align_power (s2->lma + s2->size, 2)
4030 amt += (count - 1) * sizeof (asection *);
4031 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4035 m->p_type = PT_NOTE;
4039 m->sections[m->count - count--] = s;
4040 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
4043 m->sections[m->count - 1] = s;
4044 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
4048 if (s->flags & SEC_THREAD_LOCAL)
4056 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
4059 amt = sizeof (struct elf_segment_map);
4060 amt += (tls_count - 1) * sizeof (asection *);
4061 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4066 m->count = tls_count;
4067 /* Mandated PF_R. */
4069 m->p_flags_valid = 1;
4070 for (i = 0; i < (unsigned int) tls_count; ++i)
4072 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
4073 m->sections[i] = first_tls;
4074 first_tls = first_tls->next;
4081 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
4083 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
4084 if (eh_frame_hdr != NULL
4085 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
4087 amt = sizeof (struct elf_segment_map);
4088 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4092 m->p_type = PT_GNU_EH_FRAME;
4094 m->sections[0] = eh_frame_hdr->output_section;
4100 if (elf_tdata (abfd)->stack_flags)
4102 amt = sizeof (struct elf_segment_map);
4103 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4107 m->p_type = PT_GNU_STACK;
4108 m->p_flags = elf_tdata (abfd)->stack_flags;
4109 m->p_flags_valid = 1;
4115 if (info != NULL && info->relro)
4117 for (m = mfirst; m != NULL; m = m->next)
4119 if (m->p_type == PT_LOAD)
4121 asection *last = m->sections[m->count - 1];
4122 bfd_vma vaddr = m->sections[0]->vma;
4123 bfd_vma filesz = last->vma - vaddr + last->size;
4125 if (vaddr < info->relro_end
4126 && vaddr >= info->relro_start
4127 && (vaddr + filesz) >= info->relro_end)
4132 /* Make a PT_GNU_RELRO segment only when it isn't empty. */
4135 amt = sizeof (struct elf_segment_map);
4136 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4140 m->p_type = PT_GNU_RELRO;
4142 m->p_flags_valid = 1;
4150 elf_tdata (abfd)->segment_map = mfirst;
4153 if (!elf_modify_segment_map (abfd, info, no_user_phdrs))
4156 for (count = 0, m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4158 elf_tdata (abfd)->program_header_size = count * bed->s->sizeof_phdr;
4163 if (sections != NULL)
4168 /* Sort sections by address. */
4171 elf_sort_sections (const void *arg1, const void *arg2)
4173 const asection *sec1 = *(const asection **) arg1;
4174 const asection *sec2 = *(const asection **) arg2;
4175 bfd_size_type size1, size2;
4177 /* Sort by LMA first, since this is the address used to
4178 place the section into a segment. */
4179 if (sec1->lma < sec2->lma)
4181 else if (sec1->lma > sec2->lma)
4184 /* Then sort by VMA. Normally the LMA and the VMA will be
4185 the same, and this will do nothing. */
4186 if (sec1->vma < sec2->vma)
4188 else if (sec1->vma > sec2->vma)
4191 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
4193 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
4199 /* If the indicies are the same, do not return 0
4200 here, but continue to try the next comparison. */
4201 if (sec1->target_index - sec2->target_index != 0)
4202 return sec1->target_index - sec2->target_index;
4207 else if (TOEND (sec2))
4212 /* Sort by size, to put zero sized sections
4213 before others at the same address. */
4215 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
4216 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
4223 return sec1->target_index - sec2->target_index;
4226 /* Ian Lance Taylor writes:
4228 We shouldn't be using % with a negative signed number. That's just
4229 not good. We have to make sure either that the number is not
4230 negative, or that the number has an unsigned type. When the types
4231 are all the same size they wind up as unsigned. When file_ptr is a
4232 larger signed type, the arithmetic winds up as signed long long,
4235 What we're trying to say here is something like ``increase OFF by
4236 the least amount that will cause it to be equal to the VMA modulo
4238 /* In other words, something like:
4240 vma_offset = m->sections[0]->vma % bed->maxpagesize;
4241 off_offset = off % bed->maxpagesize;
4242 if (vma_offset < off_offset)
4243 adjustment = vma_offset + bed->maxpagesize - off_offset;
4245 adjustment = vma_offset - off_offset;
4247 which can can be collapsed into the expression below. */
4250 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
4252 return ((vma - off) % maxpagesize);
4256 print_segment_map (const struct elf_segment_map *m)
4259 const char *pt = get_segment_type (m->p_type);
4264 if (m->p_type >= PT_LOPROC && m->p_type <= PT_HIPROC)
4265 sprintf (buf, "LOPROC+%7.7x",
4266 (unsigned int) (m->p_type - PT_LOPROC));
4267 else if (m->p_type >= PT_LOOS && m->p_type <= PT_HIOS)
4268 sprintf (buf, "LOOS+%7.7x",
4269 (unsigned int) (m->p_type - PT_LOOS));
4271 snprintf (buf, sizeof (buf), "%8.8x",
4272 (unsigned int) m->p_type);
4276 fprintf (stderr, "%s:", pt);
4277 for (j = 0; j < m->count; j++)
4278 fprintf (stderr, " %s", m->sections [j]->name);
4284 write_zeros (bfd *abfd, file_ptr pos, bfd_size_type len)
4289 if (bfd_seek (abfd, pos, SEEK_SET) != 0)
4291 buf = bfd_zmalloc (len);
4294 ret = bfd_bwrite (buf, len, abfd) == len;
4299 /* Assign file positions to the sections based on the mapping from
4300 sections to segments. This function also sets up some fields in
4304 assign_file_positions_for_load_sections (bfd *abfd,
4305 struct bfd_link_info *link_info)
4307 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4308 struct elf_segment_map *m;
4309 Elf_Internal_Phdr *phdrs;
4310 Elf_Internal_Phdr *p;
4312 bfd_size_type maxpagesize;
4315 bfd_vma header_pad = 0;
4317 if (link_info == NULL
4318 && !_bfd_elf_map_sections_to_segments (abfd, link_info))
4322 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4326 header_pad = m->header_size;
4329 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
4330 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
4331 elf_elfheader (abfd)->e_phnum = alloc;
4333 if (elf_tdata (abfd)->program_header_size == (bfd_size_type) -1)
4334 elf_tdata (abfd)->program_header_size = alloc * bed->s->sizeof_phdr;
4336 BFD_ASSERT (elf_tdata (abfd)->program_header_size
4337 >= alloc * bed->s->sizeof_phdr);
4341 elf_tdata (abfd)->next_file_pos = bed->s->sizeof_ehdr;
4345 /* We're writing the size in elf_tdata (abfd)->program_header_size,
4346 see assign_file_positions_except_relocs, so make sure we have
4347 that amount allocated, with trailing space cleared.
4348 The variable alloc contains the computed need, while elf_tdata
4349 (abfd)->program_header_size contains the size used for the
4351 See ld/emultempl/elf-generic.em:gld${EMULATION_NAME}_map_segments
4352 where the layout is forced to according to a larger size in the
4353 last iterations for the testcase ld-elf/header. */
4354 BFD_ASSERT (elf_tdata (abfd)->program_header_size % bed->s->sizeof_phdr
4356 phdrs = (Elf_Internal_Phdr *)
4358 (elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr),
4359 sizeof (Elf_Internal_Phdr));
4360 elf_tdata (abfd)->phdr = phdrs;
4365 if ((abfd->flags & D_PAGED) != 0)
4366 maxpagesize = bed->maxpagesize;
4368 off = bed->s->sizeof_ehdr;
4369 off += alloc * bed->s->sizeof_phdr;
4370 if (header_pad < (bfd_vma) off)
4376 for (m = elf_tdata (abfd)->segment_map, p = phdrs, j = 0;
4378 m = m->next, p++, j++)
4382 bfd_boolean no_contents;
4384 /* If elf_segment_map is not from map_sections_to_segments, the
4385 sections may not be correctly ordered. NOTE: sorting should
4386 not be done to the PT_NOTE section of a corefile, which may
4387 contain several pseudo-sections artificially created by bfd.
4388 Sorting these pseudo-sections breaks things badly. */
4390 && !(elf_elfheader (abfd)->e_type == ET_CORE
4391 && m->p_type == PT_NOTE))
4392 qsort (m->sections, (size_t) m->count, sizeof (asection *),
4395 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4396 number of sections with contents contributing to both p_filesz
4397 and p_memsz, followed by a number of sections with no contents
4398 that just contribute to p_memsz. In this loop, OFF tracks next
4399 available file offset for PT_LOAD and PT_NOTE segments. */
4400 p->p_type = m->p_type;
4401 p->p_flags = m->p_flags;
4406 p->p_vaddr = m->sections[0]->vma - m->p_vaddr_offset;
4408 if (m->p_paddr_valid)
4409 p->p_paddr = m->p_paddr;
4410 else if (m->count == 0)
4413 p->p_paddr = m->sections[0]->lma - m->p_vaddr_offset;
4415 if (p->p_type == PT_LOAD
4416 && (abfd->flags & D_PAGED) != 0)
4418 /* p_align in demand paged PT_LOAD segments effectively stores
4419 the maximum page size. When copying an executable with
4420 objcopy, we set m->p_align from the input file. Use this
4421 value for maxpagesize rather than bed->maxpagesize, which
4422 may be different. Note that we use maxpagesize for PT_TLS
4423 segment alignment later in this function, so we are relying
4424 on at least one PT_LOAD segment appearing before a PT_TLS
4426 if (m->p_align_valid)
4427 maxpagesize = m->p_align;
4429 p->p_align = maxpagesize;
4431 else if (m->p_align_valid)
4432 p->p_align = m->p_align;
4433 else if (m->count == 0)
4434 p->p_align = 1 << bed->s->log_file_align;
4438 no_contents = FALSE;
4440 if (p->p_type == PT_LOAD
4443 bfd_size_type align;
4444 unsigned int align_power = 0;
4446 if (m->p_align_valid)
4450 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4452 unsigned int secalign;
4454 secalign = bfd_get_section_alignment (abfd, *secpp);
4455 if (secalign > align_power)
4456 align_power = secalign;
4458 align = (bfd_size_type) 1 << align_power;
4459 if (align < maxpagesize)
4460 align = maxpagesize;
4463 for (i = 0; i < m->count; i++)
4464 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
4465 /* If we aren't making room for this section, then
4466 it must be SHT_NOBITS regardless of what we've
4467 set via struct bfd_elf_special_section. */
4468 elf_section_type (m->sections[i]) = SHT_NOBITS;
4470 /* Find out whether this segment contains any loadable
4473 for (i = 0; i < m->count; i++)
4474 if (elf_section_type (m->sections[i]) != SHT_NOBITS)
4476 no_contents = FALSE;
4480 off_adjust = vma_page_aligned_bias (p->p_vaddr, off, align);
4484 /* We shouldn't need to align the segment on disk since
4485 the segment doesn't need file space, but the gABI
4486 arguably requires the alignment and glibc ld.so
4487 checks it. So to comply with the alignment
4488 requirement but not waste file space, we adjust
4489 p_offset for just this segment. (OFF_ADJUST is
4490 subtracted from OFF later.) This may put p_offset
4491 past the end of file, but that shouldn't matter. */
4496 /* Make sure the .dynamic section is the first section in the
4497 PT_DYNAMIC segment. */
4498 else if (p->p_type == PT_DYNAMIC
4500 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4503 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4505 bfd_set_error (bfd_error_bad_value);
4508 /* Set the note section type to SHT_NOTE. */
4509 else if (p->p_type == PT_NOTE)
4510 for (i = 0; i < m->count; i++)
4511 elf_section_type (m->sections[i]) = SHT_NOTE;
4517 if (m->includes_filehdr)
4519 if (!m->p_flags_valid)
4521 p->p_filesz = bed->s->sizeof_ehdr;
4522 p->p_memsz = bed->s->sizeof_ehdr;
4525 BFD_ASSERT (p->p_type == PT_LOAD);
4527 if (p->p_vaddr < (bfd_vma) off)
4529 (*_bfd_error_handler)
4530 (_("%B: Not enough room for program headers, try linking with -N"),
4532 bfd_set_error (bfd_error_bad_value);
4537 if (!m->p_paddr_valid)
4542 if (m->includes_phdrs)
4544 if (!m->p_flags_valid)
4547 if (!m->includes_filehdr)
4549 p->p_offset = bed->s->sizeof_ehdr;
4553 BFD_ASSERT (p->p_type == PT_LOAD);
4554 p->p_vaddr -= off - p->p_offset;
4555 if (!m->p_paddr_valid)
4556 p->p_paddr -= off - p->p_offset;
4560 p->p_filesz += alloc * bed->s->sizeof_phdr;
4561 p->p_memsz += alloc * bed->s->sizeof_phdr;
4564 p->p_filesz += header_pad;
4565 p->p_memsz += header_pad;
4569 if (p->p_type == PT_LOAD
4570 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4572 if (!m->includes_filehdr && !m->includes_phdrs)
4578 adjust = off - (p->p_offset + p->p_filesz);
4580 p->p_filesz += adjust;
4581 p->p_memsz += adjust;
4585 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
4586 maps. Set filepos for sections in PT_LOAD segments, and in
4587 core files, for sections in PT_NOTE segments.
4588 assign_file_positions_for_non_load_sections will set filepos
4589 for other sections and update p_filesz for other segments. */
4590 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4593 bfd_size_type align;
4594 Elf_Internal_Shdr *this_hdr;
4597 this_hdr = &elf_section_data (sec)->this_hdr;
4598 align = (bfd_size_type) 1 << bfd_get_section_alignment (abfd, sec);
4600 if ((p->p_type == PT_LOAD
4601 || p->p_type == PT_TLS)
4602 && (this_hdr->sh_type != SHT_NOBITS
4603 || ((this_hdr->sh_flags & SHF_ALLOC) != 0
4604 && ((this_hdr->sh_flags & SHF_TLS) == 0
4605 || p->p_type == PT_TLS))))
4607 bfd_vma p_start = p->p_paddr;
4608 bfd_vma p_end = p_start + p->p_memsz;
4609 bfd_vma s_start = sec->lma;
4610 bfd_vma adjust = s_start - p_end;
4614 || p_end < p_start))
4616 (*_bfd_error_handler)
4617 (_("%B: section %A lma %#lx adjusted to %#lx"), abfd, sec,
4618 (unsigned long) s_start, (unsigned long) p_end);
4622 p->p_memsz += adjust;
4624 if (this_hdr->sh_type != SHT_NOBITS)
4626 if (p->p_filesz + adjust < p->p_memsz)
4628 /* We have a PROGBITS section following NOBITS ones.
4629 Allocate file space for the NOBITS section(s) and
4631 adjust = p->p_memsz - p->p_filesz;
4632 if (!write_zeros (abfd, off, adjust))
4636 p->p_filesz += adjust;
4640 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4642 /* The section at i == 0 is the one that actually contains
4646 this_hdr->sh_offset = sec->filepos = off;
4647 off += this_hdr->sh_size;
4648 p->p_filesz = this_hdr->sh_size;
4654 /* The rest are fake sections that shouldn't be written. */
4663 if (p->p_type == PT_LOAD)
4665 this_hdr->sh_offset = sec->filepos = off;
4666 if (this_hdr->sh_type != SHT_NOBITS)
4667 off += this_hdr->sh_size;
4670 if (this_hdr->sh_type != SHT_NOBITS)
4672 p->p_filesz += this_hdr->sh_size;
4673 /* A load section without SHF_ALLOC is something like
4674 a note section in a PT_NOTE segment. These take
4675 file space but are not loaded into memory. */
4676 if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4677 p->p_memsz += this_hdr->sh_size;
4679 else if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4681 if (p->p_type == PT_TLS)
4682 p->p_memsz += this_hdr->sh_size;
4684 /* .tbss is special. It doesn't contribute to p_memsz of
4686 else if ((this_hdr->sh_flags & SHF_TLS) == 0)
4687 p->p_memsz += this_hdr->sh_size;
4690 if (align > p->p_align
4691 && !m->p_align_valid
4692 && (p->p_type != PT_LOAD
4693 || (abfd->flags & D_PAGED) == 0))
4697 if (!m->p_flags_valid)
4700 if ((this_hdr->sh_flags & SHF_EXECINSTR) != 0)
4702 if ((this_hdr->sh_flags & SHF_WRITE) != 0)
4708 /* Check that all sections are in a PT_LOAD segment.
4709 Don't check funky gdb generated core files. */
4710 if (p->p_type == PT_LOAD && bfd_get_format (abfd) != bfd_core)
4712 bfd_boolean check_vma = TRUE;
4714 for (i = 1; i < m->count; i++)
4715 if (m->sections[i]->vma == m->sections[i - 1]->vma
4716 && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i])
4717 ->this_hdr), p) != 0
4718 && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i - 1])
4719 ->this_hdr), p) != 0)
4721 /* Looks like we have overlays packed into the segment. */
4726 for (i = 0; i < m->count; i++)
4728 Elf_Internal_Shdr *this_hdr;
4731 sec = m->sections[i];
4732 this_hdr = &(elf_section_data(sec)->this_hdr);
4733 if (!ELF_SECTION_IN_SEGMENT_1 (this_hdr, p, check_vma, 0))
4735 (*_bfd_error_handler)
4736 (_("%B: section `%A' can't be allocated in segment %d"),
4738 print_segment_map (m);
4744 elf_tdata (abfd)->next_file_pos = off;
4748 /* Assign file positions for the other sections. */
4751 assign_file_positions_for_non_load_sections (bfd *abfd,
4752 struct bfd_link_info *link_info)
4754 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4755 Elf_Internal_Shdr **i_shdrpp;
4756 Elf_Internal_Shdr **hdrpp;
4757 Elf_Internal_Phdr *phdrs;
4758 Elf_Internal_Phdr *p;
4759 struct elf_segment_map *m;
4760 bfd_vma filehdr_vaddr, filehdr_paddr;
4761 bfd_vma phdrs_vaddr, phdrs_paddr;
4763 unsigned int num_sec;
4767 i_shdrpp = elf_elfsections (abfd);
4768 num_sec = elf_numsections (abfd);
4769 off = elf_tdata (abfd)->next_file_pos;
4770 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4772 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4773 Elf_Internal_Shdr *hdr;
4776 if (hdr->bfd_section != NULL
4777 && (hdr->bfd_section->filepos != 0
4778 || (hdr->sh_type == SHT_NOBITS
4779 && hdr->contents == NULL)))
4780 BFD_ASSERT (hdr->sh_offset == hdr->bfd_section->filepos);
4781 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4783 (*_bfd_error_handler)
4784 (_("%B: warning: allocated section `%s' not in segment"),
4786 (hdr->bfd_section == NULL
4788 : hdr->bfd_section->name));
4789 /* We don't need to page align empty sections. */
4790 if ((abfd->flags & D_PAGED) != 0 && hdr->sh_size != 0)
4791 off += vma_page_aligned_bias (hdr->sh_addr, off,
4794 off += vma_page_aligned_bias (hdr->sh_addr, off,
4796 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4799 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4800 && hdr->bfd_section == NULL)
4801 || hdr == i_shdrpp[tdata->symtab_section]
4802 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4803 || hdr == i_shdrpp[tdata->strtab_section])
4804 hdr->sh_offset = -1;
4806 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4809 /* Now that we have set the section file positions, we can set up
4810 the file positions for the non PT_LOAD segments. */
4814 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4816 phdrs = elf_tdata (abfd)->phdr;
4817 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4822 if (p->p_type != PT_LOAD)
4825 if (m->includes_filehdr)
4827 filehdr_vaddr = p->p_vaddr;
4828 filehdr_paddr = p->p_paddr;
4830 if (m->includes_phdrs)
4832 phdrs_vaddr = p->p_vaddr;
4833 phdrs_paddr = p->p_paddr;
4834 if (m->includes_filehdr)
4836 phdrs_vaddr += bed->s->sizeof_ehdr;
4837 phdrs_paddr += bed->s->sizeof_ehdr;
4842 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4846 if (p->p_type == PT_GNU_RELRO)
4848 const Elf_Internal_Phdr *lp;
4850 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
4852 if (link_info != NULL)
4854 /* During linking the range of the RELRO segment is passed
4856 for (lp = phdrs; lp < phdrs + count; ++lp)
4858 if (lp->p_type == PT_LOAD
4859 && lp->p_vaddr >= link_info->relro_start
4860 && lp->p_vaddr < link_info->relro_end
4861 && lp->p_vaddr + lp->p_filesz >= link_info->relro_end)
4867 /* Otherwise we are copying an executable or shared
4868 library, but we need to use the same linker logic. */
4869 for (lp = phdrs; lp < phdrs + count; ++lp)
4871 if (lp->p_type == PT_LOAD
4872 && lp->p_paddr == p->p_paddr)
4877 if (lp < phdrs + count)
4879 p->p_vaddr = lp->p_vaddr;
4880 p->p_paddr = lp->p_paddr;
4881 p->p_offset = lp->p_offset;
4882 if (link_info != NULL)
4883 p->p_filesz = link_info->relro_end - lp->p_vaddr;
4884 else if (m->p_size_valid)
4885 p->p_filesz = m->p_size;
4888 p->p_memsz = p->p_filesz;
4890 p->p_flags = (lp->p_flags & ~PF_W);
4894 memset (p, 0, sizeof *p);
4895 p->p_type = PT_NULL;
4898 else if (m->count != 0)
4900 if (p->p_type != PT_LOAD
4901 && (p->p_type != PT_NOTE
4902 || bfd_get_format (abfd) != bfd_core))
4904 Elf_Internal_Shdr *hdr;
4907 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
4909 sect = m->sections[m->count - 1];
4910 hdr = &elf_section_data (sect)->this_hdr;
4911 p->p_filesz = sect->filepos - m->sections[0]->filepos;
4912 if (hdr->sh_type != SHT_NOBITS)
4913 p->p_filesz += hdr->sh_size;
4914 p->p_offset = m->sections[0]->filepos;
4917 else if (m->includes_filehdr)
4919 p->p_vaddr = filehdr_vaddr;
4920 if (! m->p_paddr_valid)
4921 p->p_paddr = filehdr_paddr;
4923 else if (m->includes_phdrs)
4925 p->p_vaddr = phdrs_vaddr;
4926 if (! m->p_paddr_valid)
4927 p->p_paddr = phdrs_paddr;
4931 elf_tdata (abfd)->next_file_pos = off;
4936 /* Work out the file positions of all the sections. This is called by
4937 _bfd_elf_compute_section_file_positions. All the section sizes and
4938 VMAs must be known before this is called.
4940 Reloc sections come in two flavours: Those processed specially as
4941 "side-channel" data attached to a section to which they apply, and
4942 those that bfd doesn't process as relocations. The latter sort are
4943 stored in a normal bfd section by bfd_section_from_shdr. We don't
4944 consider the former sort here, unless they form part of the loadable
4945 image. Reloc sections not assigned here will be handled later by
4946 assign_file_positions_for_relocs.
4948 We also don't set the positions of the .symtab and .strtab here. */
4951 assign_file_positions_except_relocs (bfd *abfd,
4952 struct bfd_link_info *link_info)
4954 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4955 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4957 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4959 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4960 && bfd_get_format (abfd) != bfd_core)
4962 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4963 unsigned int num_sec = elf_numsections (abfd);
4964 Elf_Internal_Shdr **hdrpp;
4967 /* Start after the ELF header. */
4968 off = i_ehdrp->e_ehsize;
4970 /* We are not creating an executable, which means that we are
4971 not creating a program header, and that the actual order of
4972 the sections in the file is unimportant. */
4973 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4975 Elf_Internal_Shdr *hdr;
4978 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4979 && hdr->bfd_section == NULL)
4980 || i == tdata->symtab_section
4981 || i == tdata->symtab_shndx_section
4982 || i == tdata->strtab_section)
4984 hdr->sh_offset = -1;
4987 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4994 /* Assign file positions for the loaded sections based on the
4995 assignment of sections to segments. */
4996 if (!assign_file_positions_for_load_sections (abfd, link_info))
4999 /* And for non-load sections. */
5000 if (!assign_file_positions_for_non_load_sections (abfd, link_info))
5003 if (bed->elf_backend_modify_program_headers != NULL)
5005 if (!(*bed->elf_backend_modify_program_headers) (abfd, link_info))
5009 /* Write out the program headers. */
5010 alloc = tdata->program_header_size / bed->s->sizeof_phdr;
5011 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
5012 || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
5015 off = tdata->next_file_pos;
5018 /* Place the section headers. */
5019 off = align_file_position (off, 1 << bed->s->log_file_align);
5020 i_ehdrp->e_shoff = off;
5021 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
5023 tdata->next_file_pos = off;
5029 prep_headers (bfd *abfd)
5031 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form. */
5032 struct elf_strtab_hash *shstrtab;
5033 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5035 i_ehdrp = elf_elfheader (abfd);
5037 shstrtab = _bfd_elf_strtab_init ();
5038 if (shstrtab == NULL)
5041 elf_shstrtab (abfd) = shstrtab;
5043 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
5044 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
5045 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
5046 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
5048 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
5049 i_ehdrp->e_ident[EI_DATA] =
5050 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
5051 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
5053 if ((abfd->flags & DYNAMIC) != 0)
5054 i_ehdrp->e_type = ET_DYN;
5055 else if ((abfd->flags & EXEC_P) != 0)
5056 i_ehdrp->e_type = ET_EXEC;
5057 else if (bfd_get_format (abfd) == bfd_core)
5058 i_ehdrp->e_type = ET_CORE;
5060 i_ehdrp->e_type = ET_REL;
5062 switch (bfd_get_arch (abfd))
5064 case bfd_arch_unknown:
5065 i_ehdrp->e_machine = EM_NONE;
5068 /* There used to be a long list of cases here, each one setting
5069 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
5070 in the corresponding bfd definition. To avoid duplication,
5071 the switch was removed. Machines that need special handling
5072 can generally do it in elf_backend_final_write_processing(),
5073 unless they need the information earlier than the final write.
5074 Such need can generally be supplied by replacing the tests for
5075 e_machine with the conditions used to determine it. */
5077 i_ehdrp->e_machine = bed->elf_machine_code;
5080 i_ehdrp->e_version = bed->s->ev_current;
5081 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
5083 /* No program header, for now. */
5084 i_ehdrp->e_phoff = 0;
5085 i_ehdrp->e_phentsize = 0;
5086 i_ehdrp->e_phnum = 0;
5088 /* Each bfd section is section header entry. */
5089 i_ehdrp->e_entry = bfd_get_start_address (abfd);
5090 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
5092 /* If we're building an executable, we'll need a program header table. */
5093 if (abfd->flags & EXEC_P)
5094 /* It all happens later. */
5098 i_ehdrp->e_phentsize = 0;
5099 i_ehdrp->e_phoff = 0;
5102 elf_tdata (abfd)->symtab_hdr.sh_name =
5103 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
5104 elf_tdata (abfd)->strtab_hdr.sh_name =
5105 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
5106 elf_tdata (abfd)->shstrtab_hdr.sh_name =
5107 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
5108 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
5109 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
5110 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
5116 /* Assign file positions for all the reloc sections which are not part
5117 of the loadable file image. */
5120 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
5123 unsigned int i, num_sec;
5124 Elf_Internal_Shdr **shdrpp;
5126 off = elf_tdata (abfd)->next_file_pos;
5128 num_sec = elf_numsections (abfd);
5129 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
5131 Elf_Internal_Shdr *shdrp;
5134 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
5135 && shdrp->sh_offset == -1)
5136 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
5139 elf_tdata (abfd)->next_file_pos = off;
5143 _bfd_elf_write_object_contents (bfd *abfd)
5145 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5146 Elf_Internal_Shdr **i_shdrp;
5148 unsigned int count, num_sec;
5150 if (! abfd->output_has_begun
5151 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
5154 i_shdrp = elf_elfsections (abfd);
5157 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
5161 _bfd_elf_assign_file_positions_for_relocs (abfd);
5163 /* After writing the headers, we need to write the sections too... */
5164 num_sec = elf_numsections (abfd);
5165 for (count = 1; count < num_sec; count++)
5167 if (bed->elf_backend_section_processing)
5168 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
5169 if (i_shdrp[count]->contents)
5171 bfd_size_type amt = i_shdrp[count]->sh_size;
5173 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
5174 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
5179 /* Write out the section header names. */
5180 if (elf_shstrtab (abfd) != NULL
5181 && (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
5182 || !_bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
5185 if (bed->elf_backend_final_write_processing)
5186 (*bed->elf_backend_final_write_processing) (abfd,
5187 elf_tdata (abfd)->linker);
5189 if (!bed->s->write_shdrs_and_ehdr (abfd))
5192 /* This is last since write_shdrs_and_ehdr can touch i_shdrp[0]. */
5193 if (elf_tdata (abfd)->after_write_object_contents)
5194 return (*elf_tdata (abfd)->after_write_object_contents) (abfd);
5200 _bfd_elf_write_corefile_contents (bfd *abfd)
5202 /* Hopefully this can be done just like an object file. */
5203 return _bfd_elf_write_object_contents (abfd);
5206 /* Given a section, search the header to find them. */
5209 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
5211 const struct elf_backend_data *bed;
5212 unsigned int sec_index;
5214 if (elf_section_data (asect) != NULL
5215 && elf_section_data (asect)->this_idx != 0)
5216 return elf_section_data (asect)->this_idx;
5218 if (bfd_is_abs_section (asect))
5219 sec_index = SHN_ABS;
5220 else if (bfd_is_com_section (asect))
5221 sec_index = SHN_COMMON;
5222 else if (bfd_is_und_section (asect))
5223 sec_index = SHN_UNDEF;
5225 sec_index = SHN_BAD;
5227 bed = get_elf_backend_data (abfd);
5228 if (bed->elf_backend_section_from_bfd_section)
5230 int retval = sec_index;
5232 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
5236 if (sec_index == SHN_BAD)
5237 bfd_set_error (bfd_error_nonrepresentable_section);
5242 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
5246 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
5248 asymbol *asym_ptr = *asym_ptr_ptr;
5250 flagword flags = asym_ptr->flags;
5252 /* When gas creates relocations against local labels, it creates its
5253 own symbol for the section, but does put the symbol into the
5254 symbol chain, so udata is 0. When the linker is generating
5255 relocatable output, this section symbol may be for one of the
5256 input sections rather than the output section. */
5257 if (asym_ptr->udata.i == 0
5258 && (flags & BSF_SECTION_SYM)
5259 && asym_ptr->section)
5264 sec = asym_ptr->section;
5265 if (sec->owner != abfd && sec->output_section != NULL)
5266 sec = sec->output_section;
5267 if (sec->owner == abfd
5268 && (indx = sec->index) < elf_num_section_syms (abfd)
5269 && elf_section_syms (abfd)[indx] != NULL)
5270 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
5273 idx = asym_ptr->udata.i;
5277 /* This case can occur when using --strip-symbol on a symbol
5278 which is used in a relocation entry. */
5279 (*_bfd_error_handler)
5280 (_("%B: symbol `%s' required but not present"),
5281 abfd, bfd_asymbol_name (asym_ptr));
5282 bfd_set_error (bfd_error_no_symbols);
5289 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx\n",
5290 (long) asym_ptr, asym_ptr->name, idx, (long) flags);
5298 /* Rewrite program header information. */
5301 rewrite_elf_program_header (bfd *ibfd, bfd *obfd)
5303 Elf_Internal_Ehdr *iehdr;
5304 struct elf_segment_map *map;
5305 struct elf_segment_map *map_first;
5306 struct elf_segment_map **pointer_to_map;
5307 Elf_Internal_Phdr *segment;
5310 unsigned int num_segments;
5311 bfd_boolean phdr_included = FALSE;
5312 bfd_boolean p_paddr_valid;
5313 bfd_vma maxpagesize;
5314 struct elf_segment_map *phdr_adjust_seg = NULL;
5315 unsigned int phdr_adjust_num = 0;
5316 const struct elf_backend_data *bed;
5318 bed = get_elf_backend_data (ibfd);
5319 iehdr = elf_elfheader (ibfd);
5322 pointer_to_map = &map_first;
5324 num_segments = elf_elfheader (ibfd)->e_phnum;
5325 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
5327 /* Returns the end address of the segment + 1. */
5328 #define SEGMENT_END(segment, start) \
5329 (start + (segment->p_memsz > segment->p_filesz \
5330 ? segment->p_memsz : segment->p_filesz))
5332 #define SECTION_SIZE(section, segment) \
5333 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5334 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5335 ? section->size : 0)
5337 /* Returns TRUE if the given section is contained within
5338 the given segment. VMA addresses are compared. */
5339 #define IS_CONTAINED_BY_VMA(section, segment) \
5340 (section->vma >= segment->p_vaddr \
5341 && (section->vma + SECTION_SIZE (section, segment) \
5342 <= (SEGMENT_END (segment, segment->p_vaddr))))
5344 /* Returns TRUE if the given section is contained within
5345 the given segment. LMA addresses are compared. */
5346 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5347 (section->lma >= base \
5348 && (section->lma + SECTION_SIZE (section, segment) \
5349 <= SEGMENT_END (segment, base)))
5351 /* Handle PT_NOTE segment. */
5352 #define IS_NOTE(p, s) \
5353 (p->p_type == PT_NOTE \
5354 && elf_section_type (s) == SHT_NOTE \
5355 && (bfd_vma) s->filepos >= p->p_offset \
5356 && ((bfd_vma) s->filepos + s->size \
5357 <= p->p_offset + p->p_filesz))
5359 /* Special case: corefile "NOTE" section containing regs, prpsinfo
5361 #define IS_COREFILE_NOTE(p, s) \
5363 && bfd_get_format (ibfd) == bfd_core \
5367 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5368 linker, which generates a PT_INTERP section with p_vaddr and
5369 p_memsz set to 0. */
5370 #define IS_SOLARIS_PT_INTERP(p, s) \
5372 && p->p_paddr == 0 \
5373 && p->p_memsz == 0 \
5374 && p->p_filesz > 0 \
5375 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5377 && (bfd_vma) s->filepos >= p->p_offset \
5378 && ((bfd_vma) s->filepos + s->size \
5379 <= p->p_offset + p->p_filesz))
5381 /* Decide if the given section should be included in the given segment.
5382 A section will be included if:
5383 1. It is within the address space of the segment -- we use the LMA
5384 if that is set for the segment and the VMA otherwise,
5385 2. It is an allocated section or a NOTE section in a PT_NOTE
5387 3. There is an output section associated with it,
5388 4. The section has not already been allocated to a previous segment.
5389 5. PT_GNU_STACK segments do not include any sections.
5390 6. PT_TLS segment includes only SHF_TLS sections.
5391 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5392 8. PT_DYNAMIC should not contain empty sections at the beginning
5393 (with the possible exception of .dynamic). */
5394 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
5395 ((((segment->p_paddr \
5396 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5397 : IS_CONTAINED_BY_VMA (section, segment)) \
5398 && (section->flags & SEC_ALLOC) != 0) \
5399 || IS_NOTE (segment, section)) \
5400 && segment->p_type != PT_GNU_STACK \
5401 && (segment->p_type != PT_TLS \
5402 || (section->flags & SEC_THREAD_LOCAL)) \
5403 && (segment->p_type == PT_LOAD \
5404 || segment->p_type == PT_TLS \
5405 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5406 && (segment->p_type != PT_DYNAMIC \
5407 || SECTION_SIZE (section, segment) > 0 \
5408 || (segment->p_paddr \
5409 ? segment->p_paddr != section->lma \
5410 : segment->p_vaddr != section->vma) \
5411 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5413 && !section->segment_mark)
5415 /* If the output section of a section in the input segment is NULL,
5416 it is removed from the corresponding output segment. */
5417 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5418 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
5419 && section->output_section != NULL)
5421 /* Returns TRUE iff seg1 starts after the end of seg2. */
5422 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5423 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5425 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5426 their VMA address ranges and their LMA address ranges overlap.
5427 It is possible to have overlapping VMA ranges without overlapping LMA
5428 ranges. RedBoot images for example can have both .data and .bss mapped
5429 to the same VMA range, but with the .data section mapped to a different
5431 #define SEGMENT_OVERLAPS(seg1, seg2) \
5432 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5433 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5434 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5435 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5437 /* Initialise the segment mark field. */
5438 for (section = ibfd->sections; section != NULL; section = section->next)
5439 section->segment_mark = FALSE;
5441 /* The Solaris linker creates program headers in which all the
5442 p_paddr fields are zero. When we try to objcopy or strip such a
5443 file, we get confused. Check for this case, and if we find it
5444 don't set the p_paddr_valid fields. */
5445 p_paddr_valid = FALSE;
5446 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5449 if (segment->p_paddr != 0)
5451 p_paddr_valid = TRUE;
5455 /* Scan through the segments specified in the program header
5456 of the input BFD. For this first scan we look for overlaps
5457 in the loadable segments. These can be created by weird
5458 parameters to objcopy. Also, fix some solaris weirdness. */
5459 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5464 Elf_Internal_Phdr *segment2;
5466 if (segment->p_type == PT_INTERP)
5467 for (section = ibfd->sections; section; section = section->next)
5468 if (IS_SOLARIS_PT_INTERP (segment, section))
5470 /* Mininal change so that the normal section to segment
5471 assignment code will work. */
5472 segment->p_vaddr = section->vma;
5476 if (segment->p_type != PT_LOAD)
5478 /* Remove PT_GNU_RELRO segment. */
5479 if (segment->p_type == PT_GNU_RELRO)
5480 segment->p_type = PT_NULL;
5484 /* Determine if this segment overlaps any previous segments. */
5485 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2++)
5487 bfd_signed_vma extra_length;
5489 if (segment2->p_type != PT_LOAD
5490 || !SEGMENT_OVERLAPS (segment, segment2))
5493 /* Merge the two segments together. */
5494 if (segment2->p_vaddr < segment->p_vaddr)
5496 /* Extend SEGMENT2 to include SEGMENT and then delete
5498 extra_length = (SEGMENT_END (segment, segment->p_vaddr)
5499 - SEGMENT_END (segment2, segment2->p_vaddr));
5501 if (extra_length > 0)
5503 segment2->p_memsz += extra_length;
5504 segment2->p_filesz += extra_length;
5507 segment->p_type = PT_NULL;
5509 /* Since we have deleted P we must restart the outer loop. */
5511 segment = elf_tdata (ibfd)->phdr;
5516 /* Extend SEGMENT to include SEGMENT2 and then delete
5518 extra_length = (SEGMENT_END (segment2, segment2->p_vaddr)
5519 - SEGMENT_END (segment, segment->p_vaddr));
5521 if (extra_length > 0)
5523 segment->p_memsz += extra_length;
5524 segment->p_filesz += extra_length;
5527 segment2->p_type = PT_NULL;
5532 /* The second scan attempts to assign sections to segments. */
5533 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5537 unsigned int section_count;
5538 asection **sections;
5539 asection *output_section;
5541 bfd_vma matching_lma;
5542 bfd_vma suggested_lma;
5545 asection *first_section;
5546 bfd_boolean first_matching_lma;
5547 bfd_boolean first_suggested_lma;
5549 if (segment->p_type == PT_NULL)
5552 first_section = NULL;
5553 /* Compute how many sections might be placed into this segment. */
5554 for (section = ibfd->sections, section_count = 0;
5556 section = section->next)
5558 /* Find the first section in the input segment, which may be
5559 removed from the corresponding output segment. */
5560 if (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed))
5562 if (first_section == NULL)
5563 first_section = section;
5564 if (section->output_section != NULL)
5569 /* Allocate a segment map big enough to contain
5570 all of the sections we have selected. */
5571 amt = sizeof (struct elf_segment_map);
5572 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5573 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
5577 /* Initialise the fields of the segment map. Default to
5578 using the physical address of the segment in the input BFD. */
5580 map->p_type = segment->p_type;
5581 map->p_flags = segment->p_flags;
5582 map->p_flags_valid = 1;
5584 /* If the first section in the input segment is removed, there is
5585 no need to preserve segment physical address in the corresponding
5587 if (!first_section || first_section->output_section != NULL)
5589 map->p_paddr = segment->p_paddr;
5590 map->p_paddr_valid = p_paddr_valid;
5593 /* Determine if this segment contains the ELF file header
5594 and if it contains the program headers themselves. */
5595 map->includes_filehdr = (segment->p_offset == 0
5596 && segment->p_filesz >= iehdr->e_ehsize);
5597 map->includes_phdrs = 0;
5599 if (!phdr_included || segment->p_type != PT_LOAD)
5601 map->includes_phdrs =
5602 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5603 && (segment->p_offset + segment->p_filesz
5604 >= ((bfd_vma) iehdr->e_phoff
5605 + iehdr->e_phnum * iehdr->e_phentsize)));
5607 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5608 phdr_included = TRUE;
5611 if (section_count == 0)
5613 /* Special segments, such as the PT_PHDR segment, may contain
5614 no sections, but ordinary, loadable segments should contain
5615 something. They are allowed by the ELF spec however, so only
5616 a warning is produced. */
5617 if (segment->p_type == PT_LOAD)
5618 (*_bfd_error_handler) (_("%B: warning: Empty loadable segment"
5619 " detected, is this intentional ?\n"),
5623 *pointer_to_map = map;
5624 pointer_to_map = &map->next;
5629 /* Now scan the sections in the input BFD again and attempt
5630 to add their corresponding output sections to the segment map.
5631 The problem here is how to handle an output section which has
5632 been moved (ie had its LMA changed). There are four possibilities:
5634 1. None of the sections have been moved.
5635 In this case we can continue to use the segment LMA from the
5638 2. All of the sections have been moved by the same amount.
5639 In this case we can change the segment's LMA to match the LMA
5640 of the first section.
5642 3. Some of the sections have been moved, others have not.
5643 In this case those sections which have not been moved can be
5644 placed in the current segment which will have to have its size,
5645 and possibly its LMA changed, and a new segment or segments will
5646 have to be created to contain the other sections.
5648 4. The sections have been moved, but not by the same amount.
5649 In this case we can change the segment's LMA to match the LMA
5650 of the first section and we will have to create a new segment
5651 or segments to contain the other sections.
5653 In order to save time, we allocate an array to hold the section
5654 pointers that we are interested in. As these sections get assigned
5655 to a segment, they are removed from this array. */
5657 sections = (asection **) bfd_malloc2 (section_count, sizeof (asection *));
5658 if (sections == NULL)
5661 /* Step One: Scan for segment vs section LMA conflicts.
5662 Also add the sections to the section array allocated above.
5663 Also add the sections to the current segment. In the common
5664 case, where the sections have not been moved, this means that
5665 we have completely filled the segment, and there is nothing
5670 first_matching_lma = TRUE;
5671 first_suggested_lma = TRUE;
5673 for (section = ibfd->sections;
5675 section = section->next)
5676 if (section == first_section)
5679 for (j = 0; section != NULL; section = section->next)
5681 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5683 output_section = section->output_section;
5685 sections[j++] = section;
5687 /* The Solaris native linker always sets p_paddr to 0.
5688 We try to catch that case here, and set it to the
5689 correct value. Note - some backends require that
5690 p_paddr be left as zero. */
5692 && segment->p_vaddr != 0
5693 && !bed->want_p_paddr_set_to_zero
5695 && output_section->lma != 0
5696 && output_section->vma == (segment->p_vaddr
5697 + (map->includes_filehdr
5700 + (map->includes_phdrs
5702 * iehdr->e_phentsize)
5704 map->p_paddr = segment->p_vaddr;
5706 /* Match up the physical address of the segment with the
5707 LMA address of the output section. */
5708 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5709 || IS_COREFILE_NOTE (segment, section)
5710 || (bed->want_p_paddr_set_to_zero
5711 && IS_CONTAINED_BY_VMA (output_section, segment)))
5713 if (first_matching_lma || output_section->lma < matching_lma)
5715 matching_lma = output_section->lma;
5716 first_matching_lma = FALSE;
5719 /* We assume that if the section fits within the segment
5720 then it does not overlap any other section within that
5722 map->sections[isec++] = output_section;
5724 else if (first_suggested_lma)
5726 suggested_lma = output_section->lma;
5727 first_suggested_lma = FALSE;
5730 if (j == section_count)
5735 BFD_ASSERT (j == section_count);
5737 /* Step Two: Adjust the physical address of the current segment,
5739 if (isec == section_count)
5741 /* All of the sections fitted within the segment as currently
5742 specified. This is the default case. Add the segment to
5743 the list of built segments and carry on to process the next
5744 program header in the input BFD. */
5745 map->count = section_count;
5746 *pointer_to_map = map;
5747 pointer_to_map = &map->next;
5750 && !bed->want_p_paddr_set_to_zero
5751 && matching_lma != map->p_paddr
5752 && !map->includes_filehdr
5753 && !map->includes_phdrs)
5754 /* There is some padding before the first section in the
5755 segment. So, we must account for that in the output
5757 map->p_vaddr_offset = matching_lma - map->p_paddr;
5764 if (!first_matching_lma)
5766 /* At least one section fits inside the current segment.
5767 Keep it, but modify its physical address to match the
5768 LMA of the first section that fitted. */
5769 map->p_paddr = matching_lma;
5773 /* None of the sections fitted inside the current segment.
5774 Change the current segment's physical address to match
5775 the LMA of the first section. */
5776 map->p_paddr = suggested_lma;
5779 /* Offset the segment physical address from the lma
5780 to allow for space taken up by elf headers. */
5781 if (map->includes_filehdr)
5783 if (map->p_paddr >= iehdr->e_ehsize)
5784 map->p_paddr -= iehdr->e_ehsize;
5787 map->includes_filehdr = FALSE;
5788 map->includes_phdrs = FALSE;
5792 if (map->includes_phdrs)
5794 if (map->p_paddr >= iehdr->e_phnum * iehdr->e_phentsize)
5796 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5798 /* iehdr->e_phnum is just an estimate of the number
5799 of program headers that we will need. Make a note
5800 here of the number we used and the segment we chose
5801 to hold these headers, so that we can adjust the
5802 offset when we know the correct value. */
5803 phdr_adjust_num = iehdr->e_phnum;
5804 phdr_adjust_seg = map;
5807 map->includes_phdrs = FALSE;
5811 /* Step Three: Loop over the sections again, this time assigning
5812 those that fit to the current segment and removing them from the
5813 sections array; but making sure not to leave large gaps. Once all
5814 possible sections have been assigned to the current segment it is
5815 added to the list of built segments and if sections still remain
5816 to be assigned, a new segment is constructed before repeating
5823 first_suggested_lma = TRUE;
5825 /* Fill the current segment with sections that fit. */
5826 for (j = 0; j < section_count; j++)
5828 section = sections[j];
5830 if (section == NULL)
5833 output_section = section->output_section;
5835 BFD_ASSERT (output_section != NULL);
5837 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5838 || IS_COREFILE_NOTE (segment, section))
5840 if (map->count == 0)
5842 /* If the first section in a segment does not start at
5843 the beginning of the segment, then something is
5845 if (output_section->lma
5847 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5848 + (map->includes_phdrs
5849 ? iehdr->e_phnum * iehdr->e_phentsize
5857 prev_sec = map->sections[map->count - 1];
5859 /* If the gap between the end of the previous section
5860 and the start of this section is more than
5861 maxpagesize then we need to start a new segment. */
5862 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
5864 < BFD_ALIGN (output_section->lma, maxpagesize))
5865 || (prev_sec->lma + prev_sec->size
5866 > output_section->lma))
5868 if (first_suggested_lma)
5870 suggested_lma = output_section->lma;
5871 first_suggested_lma = FALSE;
5878 map->sections[map->count++] = output_section;
5881 section->segment_mark = TRUE;
5883 else if (first_suggested_lma)
5885 suggested_lma = output_section->lma;
5886 first_suggested_lma = FALSE;
5890 BFD_ASSERT (map->count > 0);
5892 /* Add the current segment to the list of built segments. */
5893 *pointer_to_map = map;
5894 pointer_to_map = &map->next;
5896 if (isec < section_count)
5898 /* We still have not allocated all of the sections to
5899 segments. Create a new segment here, initialise it
5900 and carry on looping. */
5901 amt = sizeof (struct elf_segment_map);
5902 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5903 map = (struct elf_segment_map *) bfd_alloc (obfd, amt);
5910 /* Initialise the fields of the segment map. Set the physical
5911 physical address to the LMA of the first section that has
5912 not yet been assigned. */
5914 map->p_type = segment->p_type;
5915 map->p_flags = segment->p_flags;
5916 map->p_flags_valid = 1;
5917 map->p_paddr = suggested_lma;
5918 map->p_paddr_valid = p_paddr_valid;
5919 map->includes_filehdr = 0;
5920 map->includes_phdrs = 0;
5923 while (isec < section_count);
5928 elf_tdata (obfd)->segment_map = map_first;
5930 /* If we had to estimate the number of program headers that were
5931 going to be needed, then check our estimate now and adjust
5932 the offset if necessary. */
5933 if (phdr_adjust_seg != NULL)
5937 for (count = 0, map = map_first; map != NULL; map = map->next)
5940 if (count > phdr_adjust_num)
5941 phdr_adjust_seg->p_paddr
5942 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5947 #undef IS_CONTAINED_BY_VMA
5948 #undef IS_CONTAINED_BY_LMA
5950 #undef IS_COREFILE_NOTE
5951 #undef IS_SOLARIS_PT_INTERP
5952 #undef IS_SECTION_IN_INPUT_SEGMENT
5953 #undef INCLUDE_SECTION_IN_SEGMENT
5954 #undef SEGMENT_AFTER_SEGMENT
5955 #undef SEGMENT_OVERLAPS
5959 /* Copy ELF program header information. */
5962 copy_elf_program_header (bfd *ibfd, bfd *obfd)
5964 Elf_Internal_Ehdr *iehdr;
5965 struct elf_segment_map *map;
5966 struct elf_segment_map *map_first;
5967 struct elf_segment_map **pointer_to_map;
5968 Elf_Internal_Phdr *segment;
5970 unsigned int num_segments;
5971 bfd_boolean phdr_included = FALSE;
5972 bfd_boolean p_paddr_valid;
5974 iehdr = elf_elfheader (ibfd);
5977 pointer_to_map = &map_first;
5979 /* If all the segment p_paddr fields are zero, don't set
5980 map->p_paddr_valid. */
5981 p_paddr_valid = FALSE;
5982 num_segments = elf_elfheader (ibfd)->e_phnum;
5983 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5986 if (segment->p_paddr != 0)
5988 p_paddr_valid = TRUE;
5992 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5997 unsigned int section_count;
5999 Elf_Internal_Shdr *this_hdr;
6000 asection *first_section = NULL;
6001 asection *lowest_section;
6003 /* Compute how many sections are in this segment. */
6004 for (section = ibfd->sections, section_count = 0;
6006 section = section->next)
6008 this_hdr = &(elf_section_data(section)->this_hdr);
6009 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
6011 if (first_section == NULL)
6012 first_section = section;
6017 /* Allocate a segment map big enough to contain
6018 all of the sections we have selected. */
6019 amt = sizeof (struct elf_segment_map);
6020 if (section_count != 0)
6021 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
6022 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
6026 /* Initialize the fields of the output segment map with the
6029 map->p_type = segment->p_type;
6030 map->p_flags = segment->p_flags;
6031 map->p_flags_valid = 1;
6032 map->p_paddr = segment->p_paddr;
6033 map->p_paddr_valid = p_paddr_valid;
6034 map->p_align = segment->p_align;
6035 map->p_align_valid = 1;
6036 map->p_vaddr_offset = 0;
6038 if (map->p_type == PT_GNU_RELRO)
6040 /* The PT_GNU_RELRO segment may contain the first a few
6041 bytes in the .got.plt section even if the whole .got.plt
6042 section isn't in the PT_GNU_RELRO segment. We won't
6043 change the size of the PT_GNU_RELRO segment. */
6044 map->p_size = segment->p_memsz;
6045 map->p_size_valid = 1;
6048 /* Determine if this segment contains the ELF file header
6049 and if it contains the program headers themselves. */
6050 map->includes_filehdr = (segment->p_offset == 0
6051 && segment->p_filesz >= iehdr->e_ehsize);
6053 map->includes_phdrs = 0;
6054 if (! phdr_included || segment->p_type != PT_LOAD)
6056 map->includes_phdrs =
6057 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
6058 && (segment->p_offset + segment->p_filesz
6059 >= ((bfd_vma) iehdr->e_phoff
6060 + iehdr->e_phnum * iehdr->e_phentsize)));
6062 if (segment->p_type == PT_LOAD && map->includes_phdrs)
6063 phdr_included = TRUE;
6066 lowest_section = first_section;
6067 if (section_count != 0)
6069 unsigned int isec = 0;
6071 for (section = first_section;
6073 section = section->next)
6075 this_hdr = &(elf_section_data(section)->this_hdr);
6076 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
6078 map->sections[isec++] = section->output_section;
6079 if (section->lma < lowest_section->lma)
6080 lowest_section = section;
6081 if ((section->flags & SEC_ALLOC) != 0)
6085 /* Section lmas are set up from PT_LOAD header
6086 p_paddr in _bfd_elf_make_section_from_shdr.
6087 If this header has a p_paddr that disagrees
6088 with the section lma, flag the p_paddr as
6090 if ((section->flags & SEC_LOAD) != 0)
6091 seg_off = this_hdr->sh_offset - segment->p_offset;
6093 seg_off = this_hdr->sh_addr - segment->p_vaddr;
6094 if (section->lma - segment->p_paddr != seg_off)
6095 map->p_paddr_valid = FALSE;
6097 if (isec == section_count)
6103 if (map->includes_filehdr && lowest_section != NULL)
6104 /* We need to keep the space used by the headers fixed. */
6105 map->header_size = lowest_section->vma - segment->p_vaddr;
6107 if (!map->includes_phdrs
6108 && !map->includes_filehdr
6109 && map->p_paddr_valid)
6110 /* There is some other padding before the first section. */
6111 map->p_vaddr_offset = ((lowest_section ? lowest_section->lma : 0)
6112 - segment->p_paddr);
6114 map->count = section_count;
6115 *pointer_to_map = map;
6116 pointer_to_map = &map->next;
6119 elf_tdata (obfd)->segment_map = map_first;
6123 /* Copy private BFD data. This copies or rewrites ELF program header
6127 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
6129 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6130 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6133 if (elf_tdata (ibfd)->phdr == NULL)
6136 if (ibfd->xvec == obfd->xvec)
6138 /* Check to see if any sections in the input BFD
6139 covered by ELF program header have changed. */
6140 Elf_Internal_Phdr *segment;
6141 asection *section, *osec;
6142 unsigned int i, num_segments;
6143 Elf_Internal_Shdr *this_hdr;
6144 const struct elf_backend_data *bed;
6146 bed = get_elf_backend_data (ibfd);
6148 /* Regenerate the segment map if p_paddr is set to 0. */
6149 if (bed->want_p_paddr_set_to_zero)
6152 /* Initialize the segment mark field. */
6153 for (section = obfd->sections; section != NULL;
6154 section = section->next)
6155 section->segment_mark = FALSE;
6157 num_segments = elf_elfheader (ibfd)->e_phnum;
6158 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6162 /* PR binutils/3535. The Solaris linker always sets the p_paddr
6163 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
6164 which severly confuses things, so always regenerate the segment
6165 map in this case. */
6166 if (segment->p_paddr == 0
6167 && segment->p_memsz == 0
6168 && (segment->p_type == PT_INTERP || segment->p_type == PT_DYNAMIC))
6171 for (section = ibfd->sections;
6172 section != NULL; section = section->next)
6174 /* We mark the output section so that we know it comes
6175 from the input BFD. */
6176 osec = section->output_section;
6178 osec->segment_mark = TRUE;
6180 /* Check if this section is covered by the segment. */
6181 this_hdr = &(elf_section_data(section)->this_hdr);
6182 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
6184 /* FIXME: Check if its output section is changed or
6185 removed. What else do we need to check? */
6187 || section->flags != osec->flags
6188 || section->lma != osec->lma
6189 || section->vma != osec->vma
6190 || section->size != osec->size
6191 || section->rawsize != osec->rawsize
6192 || section->alignment_power != osec->alignment_power)
6198 /* Check to see if any output section do not come from the
6200 for (section = obfd->sections; section != NULL;
6201 section = section->next)
6203 if (section->segment_mark == FALSE)
6206 section->segment_mark = FALSE;
6209 return copy_elf_program_header (ibfd, obfd);
6213 return rewrite_elf_program_header (ibfd, obfd);
6216 /* Initialize private output section information from input section. */
6219 _bfd_elf_init_private_section_data (bfd *ibfd,
6223 struct bfd_link_info *link_info)
6226 Elf_Internal_Shdr *ihdr, *ohdr;
6227 bfd_boolean final_link = link_info != NULL && !link_info->relocatable;
6229 if (ibfd->xvec->flavour != bfd_target_elf_flavour
6230 || obfd->xvec->flavour != bfd_target_elf_flavour)
6233 /* For objcopy and relocatable link, don't copy the output ELF
6234 section type from input if the output BFD section flags have been
6235 set to something different. For a final link allow some flags
6236 that the linker clears to differ. */
6237 if (elf_section_type (osec) == SHT_NULL
6238 && (osec->flags == isec->flags
6240 && ((osec->flags ^ isec->flags)
6241 & ~(SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_RELOC)) == 0)))
6242 elf_section_type (osec) = elf_section_type (isec);
6244 /* FIXME: Is this correct for all OS/PROC specific flags? */
6245 elf_section_flags (osec) |= (elf_section_flags (isec)
6246 & (SHF_MASKOS | SHF_MASKPROC));
6248 /* Set things up for objcopy and relocatable link. The output
6249 SHT_GROUP section will have its elf_next_in_group pointing back
6250 to the input group members. Ignore linker created group section.
6251 See elfNN_ia64_object_p in elfxx-ia64.c. */
6254 if (elf_sec_group (isec) == NULL
6255 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)
6257 if (elf_section_flags (isec) & SHF_GROUP)
6258 elf_section_flags (osec) |= SHF_GROUP;
6259 elf_next_in_group (osec) = elf_next_in_group (isec);
6260 elf_section_data (osec)->group = elf_section_data (isec)->group;
6264 ihdr = &elf_section_data (isec)->this_hdr;
6266 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
6267 don't use the output section of the linked-to section since it
6268 may be NULL at this point. */
6269 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
6271 ohdr = &elf_section_data (osec)->this_hdr;
6272 ohdr->sh_flags |= SHF_LINK_ORDER;
6273 elf_linked_to_section (osec) = elf_linked_to_section (isec);
6276 osec->use_rela_p = isec->use_rela_p;
6281 /* Copy private section information. This copies over the entsize
6282 field, and sometimes the info field. */
6285 _bfd_elf_copy_private_section_data (bfd *ibfd,
6290 Elf_Internal_Shdr *ihdr, *ohdr;
6292 if (ibfd->xvec->flavour != bfd_target_elf_flavour
6293 || obfd->xvec->flavour != bfd_target_elf_flavour)
6296 ihdr = &elf_section_data (isec)->this_hdr;
6297 ohdr = &elf_section_data (osec)->this_hdr;
6299 ohdr->sh_entsize = ihdr->sh_entsize;
6301 if (ihdr->sh_type == SHT_SYMTAB
6302 || ihdr->sh_type == SHT_DYNSYM
6303 || ihdr->sh_type == SHT_GNU_verneed
6304 || ihdr->sh_type == SHT_GNU_verdef)
6305 ohdr->sh_info = ihdr->sh_info;
6307 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
6311 /* Look at all the SHT_GROUP sections in IBFD, making any adjustments
6312 necessary if we are removing either the SHT_GROUP section or any of
6313 the group member sections. DISCARDED is the value that a section's
6314 output_section has if the section will be discarded, NULL when this
6315 function is called from objcopy, bfd_abs_section_ptr when called
6319 _bfd_elf_fixup_group_sections (bfd *ibfd, asection *discarded)
6323 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
6324 if (elf_section_type (isec) == SHT_GROUP)
6326 asection *first = elf_next_in_group (isec);
6327 asection *s = first;
6328 bfd_size_type removed = 0;
6332 /* If this member section is being output but the
6333 SHT_GROUP section is not, then clear the group info
6334 set up by _bfd_elf_copy_private_section_data. */
6335 if (s->output_section != discarded
6336 && isec->output_section == discarded)
6338 elf_section_flags (s->output_section) &= ~SHF_GROUP;
6339 elf_group_name (s->output_section) = NULL;
6341 /* Conversely, if the member section is not being output
6342 but the SHT_GROUP section is, then adjust its size. */
6343 else if (s->output_section == discarded
6344 && isec->output_section != discarded)
6346 s = elf_next_in_group (s);
6352 if (discarded != NULL)
6354 /* If we've been called for ld -r, then we need to
6355 adjust the input section size. This function may
6356 be called multiple times, so save the original
6358 if (isec->rawsize == 0)
6359 isec->rawsize = isec->size;
6360 isec->size = isec->rawsize - removed;
6364 /* Adjust the output section size when called from
6366 isec->output_section->size -= removed;
6374 /* Copy private header information. */
6377 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
6379 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6380 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6383 /* Copy over private BFD data if it has not already been copied.
6384 This must be done here, rather than in the copy_private_bfd_data
6385 entry point, because the latter is called after the section
6386 contents have been set, which means that the program headers have
6387 already been worked out. */
6388 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
6390 if (! copy_private_bfd_data (ibfd, obfd))
6394 return _bfd_elf_fixup_group_sections (ibfd, NULL);
6397 /* Copy private symbol information. If this symbol is in a section
6398 which we did not map into a BFD section, try to map the section
6399 index correctly. We use special macro definitions for the mapped
6400 section indices; these definitions are interpreted by the
6401 swap_out_syms function. */
6403 #define MAP_ONESYMTAB (SHN_HIOS + 1)
6404 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
6405 #define MAP_STRTAB (SHN_HIOS + 3)
6406 #define MAP_SHSTRTAB (SHN_HIOS + 4)
6407 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
6410 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
6415 elf_symbol_type *isym, *osym;
6417 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6418 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6421 isym = elf_symbol_from (ibfd, isymarg);
6422 osym = elf_symbol_from (obfd, osymarg);
6425 && isym->internal_elf_sym.st_shndx != 0
6427 && bfd_is_abs_section (isym->symbol.section))
6431 shndx = isym->internal_elf_sym.st_shndx;
6432 if (shndx == elf_onesymtab (ibfd))
6433 shndx = MAP_ONESYMTAB;
6434 else if (shndx == elf_dynsymtab (ibfd))
6435 shndx = MAP_DYNSYMTAB;
6436 else if (shndx == elf_tdata (ibfd)->strtab_section)
6438 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
6439 shndx = MAP_SHSTRTAB;
6440 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
6441 shndx = MAP_SYM_SHNDX;
6442 osym->internal_elf_sym.st_shndx = shndx;
6448 /* Swap out the symbols. */
6451 swap_out_syms (bfd *abfd,
6452 struct bfd_strtab_hash **sttp,
6455 const struct elf_backend_data *bed;
6458 struct bfd_strtab_hash *stt;
6459 Elf_Internal_Shdr *symtab_hdr;
6460 Elf_Internal_Shdr *symtab_shndx_hdr;
6461 Elf_Internal_Shdr *symstrtab_hdr;
6462 bfd_byte *outbound_syms;
6463 bfd_byte *outbound_shndx;
6466 bfd_boolean name_local_sections;
6468 if (!elf_map_symbols (abfd))
6471 /* Dump out the symtabs. */
6472 stt = _bfd_elf_stringtab_init ();
6476 bed = get_elf_backend_data (abfd);
6477 symcount = bfd_get_symcount (abfd);
6478 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
6479 symtab_hdr->sh_type = SHT_SYMTAB;
6480 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
6481 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
6482 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
6483 symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
6485 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
6486 symstrtab_hdr->sh_type = SHT_STRTAB;
6488 outbound_syms = (bfd_byte *) bfd_alloc2 (abfd, 1 + symcount,
6489 bed->s->sizeof_sym);
6490 if (outbound_syms == NULL)
6492 _bfd_stringtab_free (stt);
6495 symtab_hdr->contents = outbound_syms;
6497 outbound_shndx = NULL;
6498 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
6499 if (symtab_shndx_hdr->sh_name != 0)
6501 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
6502 outbound_shndx = (bfd_byte *)
6503 bfd_zalloc2 (abfd, 1 + symcount, sizeof (Elf_External_Sym_Shndx));
6504 if (outbound_shndx == NULL)
6506 _bfd_stringtab_free (stt);
6510 symtab_shndx_hdr->contents = outbound_shndx;
6511 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
6512 symtab_shndx_hdr->sh_size = amt;
6513 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
6514 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
6517 /* Now generate the data (for "contents"). */
6519 /* Fill in zeroth symbol and swap it out. */
6520 Elf_Internal_Sym sym;
6526 sym.st_shndx = SHN_UNDEF;
6527 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6528 outbound_syms += bed->s->sizeof_sym;
6529 if (outbound_shndx != NULL)
6530 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6534 = (bed->elf_backend_name_local_section_symbols
6535 && bed->elf_backend_name_local_section_symbols (abfd));
6537 syms = bfd_get_outsymbols (abfd);
6538 for (idx = 0; idx < symcount; idx++)
6540 Elf_Internal_Sym sym;
6541 bfd_vma value = syms[idx]->value;
6542 elf_symbol_type *type_ptr;
6543 flagword flags = syms[idx]->flags;
6546 if (!name_local_sections
6547 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
6549 /* Local section symbols have no name. */
6554 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
6557 if (sym.st_name == (unsigned long) -1)
6559 _bfd_stringtab_free (stt);
6564 type_ptr = elf_symbol_from (abfd, syms[idx]);
6566 if ((flags & BSF_SECTION_SYM) == 0
6567 && bfd_is_com_section (syms[idx]->section))
6569 /* ELF common symbols put the alignment into the `value' field,
6570 and the size into the `size' field. This is backwards from
6571 how BFD handles it, so reverse it here. */
6572 sym.st_size = value;
6573 if (type_ptr == NULL
6574 || type_ptr->internal_elf_sym.st_value == 0)
6575 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
6577 sym.st_value = type_ptr->internal_elf_sym.st_value;
6578 sym.st_shndx = _bfd_elf_section_from_bfd_section
6579 (abfd, syms[idx]->section);
6583 asection *sec = syms[idx]->section;
6586 if (sec->output_section)
6588 value += sec->output_offset;
6589 sec = sec->output_section;
6592 /* Don't add in the section vma for relocatable output. */
6593 if (! relocatable_p)
6595 sym.st_value = value;
6596 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
6598 if (bfd_is_abs_section (sec)
6600 && type_ptr->internal_elf_sym.st_shndx != 0)
6602 /* This symbol is in a real ELF section which we did
6603 not create as a BFD section. Undo the mapping done
6604 by copy_private_symbol_data. */
6605 shndx = type_ptr->internal_elf_sym.st_shndx;
6609 shndx = elf_onesymtab (abfd);
6612 shndx = elf_dynsymtab (abfd);
6615 shndx = elf_tdata (abfd)->strtab_section;
6618 shndx = elf_tdata (abfd)->shstrtab_section;
6621 shndx = elf_tdata (abfd)->symtab_shndx_section;
6629 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
6631 if (shndx == SHN_BAD)
6635 /* Writing this would be a hell of a lot easier if
6636 we had some decent documentation on bfd, and
6637 knew what to expect of the library, and what to
6638 demand of applications. For example, it
6639 appears that `objcopy' might not set the
6640 section of a symbol to be a section that is
6641 actually in the output file. */
6642 sec2 = bfd_get_section_by_name (abfd, sec->name);
6645 _bfd_error_handler (_("\
6646 Unable to find equivalent output section for symbol '%s' from section '%s'"),
6647 syms[idx]->name ? syms[idx]->name : "<Local sym>",
6649 bfd_set_error (bfd_error_invalid_operation);
6650 _bfd_stringtab_free (stt);
6654 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
6655 BFD_ASSERT (shndx != SHN_BAD);
6659 sym.st_shndx = shndx;
6662 if ((flags & BSF_THREAD_LOCAL) != 0)
6664 else if ((flags & BSF_GNU_INDIRECT_FUNCTION) != 0)
6665 type = STT_GNU_IFUNC;
6666 else if ((flags & BSF_FUNCTION) != 0)
6668 else if ((flags & BSF_OBJECT) != 0)
6670 else if ((flags & BSF_RELC) != 0)
6672 else if ((flags & BSF_SRELC) != 0)
6677 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
6680 /* Processor-specific types. */
6681 if (type_ptr != NULL
6682 && bed->elf_backend_get_symbol_type)
6683 type = ((*bed->elf_backend_get_symbol_type)
6684 (&type_ptr->internal_elf_sym, type));
6686 if (flags & BSF_SECTION_SYM)
6688 if (flags & BSF_GLOBAL)
6689 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
6691 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
6693 else if (bfd_is_com_section (syms[idx]->section))
6695 #ifdef USE_STT_COMMON
6696 if (type == STT_OBJECT)
6697 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_COMMON);
6700 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
6702 else if (bfd_is_und_section (syms[idx]->section))
6703 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
6707 else if (flags & BSF_FILE)
6708 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
6711 int bind = STB_LOCAL;
6713 if (flags & BSF_LOCAL)
6715 else if (flags & BSF_GNU_UNIQUE)
6716 bind = STB_GNU_UNIQUE;
6717 else if (flags & BSF_WEAK)
6719 else if (flags & BSF_GLOBAL)
6722 sym.st_info = ELF_ST_INFO (bind, type);
6725 if (type_ptr != NULL)
6726 sym.st_other = type_ptr->internal_elf_sym.st_other;
6730 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6731 outbound_syms += bed->s->sizeof_sym;
6732 if (outbound_shndx != NULL)
6733 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6737 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
6738 symstrtab_hdr->sh_type = SHT_STRTAB;
6740 symstrtab_hdr->sh_flags = 0;
6741 symstrtab_hdr->sh_addr = 0;
6742 symstrtab_hdr->sh_entsize = 0;
6743 symstrtab_hdr->sh_link = 0;
6744 symstrtab_hdr->sh_info = 0;
6745 symstrtab_hdr->sh_addralign = 1;
6750 /* Return the number of bytes required to hold the symtab vector.
6752 Note that we base it on the count plus 1, since we will null terminate
6753 the vector allocated based on this size. However, the ELF symbol table
6754 always has a dummy entry as symbol #0, so it ends up even. */
6757 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
6761 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
6763 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6764 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6766 symtab_size -= sizeof (asymbol *);
6772 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
6776 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
6778 if (elf_dynsymtab (abfd) == 0)
6780 bfd_set_error (bfd_error_invalid_operation);
6784 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6785 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6787 symtab_size -= sizeof (asymbol *);
6793 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
6796 return (asect->reloc_count + 1) * sizeof (arelent *);
6799 /* Canonicalize the relocs. */
6802 _bfd_elf_canonicalize_reloc (bfd *abfd,
6809 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6811 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
6814 tblptr = section->relocation;
6815 for (i = 0; i < section->reloc_count; i++)
6816 *relptr++ = tblptr++;
6820 return section->reloc_count;
6824 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
6826 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6827 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
6830 bfd_get_symcount (abfd) = symcount;
6835 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
6836 asymbol **allocation)
6838 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6839 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
6842 bfd_get_dynamic_symcount (abfd) = symcount;
6846 /* Return the size required for the dynamic reloc entries. Any loadable
6847 section that was actually installed in the BFD, and has type SHT_REL
6848 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6849 dynamic reloc section. */
6852 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
6857 if (elf_dynsymtab (abfd) == 0)
6859 bfd_set_error (bfd_error_invalid_operation);
6863 ret = sizeof (arelent *);
6864 for (s = abfd->sections; s != NULL; s = s->next)
6865 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6866 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6867 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6868 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
6869 * sizeof (arelent *));
6874 /* Canonicalize the dynamic relocation entries. Note that we return the
6875 dynamic relocations as a single block, although they are actually
6876 associated with particular sections; the interface, which was
6877 designed for SunOS style shared libraries, expects that there is only
6878 one set of dynamic relocs. Any loadable section that was actually
6879 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6880 dynamic symbol table, is considered to be a dynamic reloc section. */
6883 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
6887 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6891 if (elf_dynsymtab (abfd) == 0)
6893 bfd_set_error (bfd_error_invalid_operation);
6897 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6899 for (s = abfd->sections; s != NULL; s = s->next)
6901 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6902 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6903 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6908 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
6910 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
6912 for (i = 0; i < count; i++)
6923 /* Read in the version information. */
6926 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
6928 bfd_byte *contents = NULL;
6929 unsigned int freeidx = 0;
6931 if (elf_dynverref (abfd) != 0)
6933 Elf_Internal_Shdr *hdr;
6934 Elf_External_Verneed *everneed;
6935 Elf_Internal_Verneed *iverneed;
6937 bfd_byte *contents_end;
6939 hdr = &elf_tdata (abfd)->dynverref_hdr;
6941 elf_tdata (abfd)->verref = (Elf_Internal_Verneed *)
6942 bfd_zalloc2 (abfd, hdr->sh_info, sizeof (Elf_Internal_Verneed));
6943 if (elf_tdata (abfd)->verref == NULL)
6946 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6948 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
6949 if (contents == NULL)
6951 error_return_verref:
6952 elf_tdata (abfd)->verref = NULL;
6953 elf_tdata (abfd)->cverrefs = 0;
6956 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6957 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6958 goto error_return_verref;
6960 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verneed))
6961 goto error_return_verref;
6963 BFD_ASSERT (sizeof (Elf_External_Verneed)
6964 == sizeof (Elf_External_Vernaux));
6965 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
6966 everneed = (Elf_External_Verneed *) contents;
6967 iverneed = elf_tdata (abfd)->verref;
6968 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6970 Elf_External_Vernaux *evernaux;
6971 Elf_Internal_Vernaux *ivernaux;
6974 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
6976 iverneed->vn_bfd = abfd;
6978 iverneed->vn_filename =
6979 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6981 if (iverneed->vn_filename == NULL)
6982 goto error_return_verref;
6984 if (iverneed->vn_cnt == 0)
6985 iverneed->vn_auxptr = NULL;
6988 iverneed->vn_auxptr = (struct elf_internal_vernaux *)
6989 bfd_alloc2 (abfd, iverneed->vn_cnt,
6990 sizeof (Elf_Internal_Vernaux));
6991 if (iverneed->vn_auxptr == NULL)
6992 goto error_return_verref;
6995 if (iverneed->vn_aux
6996 > (size_t) (contents_end - (bfd_byte *) everneed))
6997 goto error_return_verref;
6999 evernaux = ((Elf_External_Vernaux *)
7000 ((bfd_byte *) everneed + iverneed->vn_aux));
7001 ivernaux = iverneed->vn_auxptr;
7002 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
7004 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
7006 ivernaux->vna_nodename =
7007 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
7008 ivernaux->vna_name);
7009 if (ivernaux->vna_nodename == NULL)
7010 goto error_return_verref;
7012 if (j + 1 < iverneed->vn_cnt)
7013 ivernaux->vna_nextptr = ivernaux + 1;
7015 ivernaux->vna_nextptr = NULL;
7017 if (ivernaux->vna_next
7018 > (size_t) (contents_end - (bfd_byte *) evernaux))
7019 goto error_return_verref;
7021 evernaux = ((Elf_External_Vernaux *)
7022 ((bfd_byte *) evernaux + ivernaux->vna_next));
7024 if (ivernaux->vna_other > freeidx)
7025 freeidx = ivernaux->vna_other;
7028 if (i + 1 < hdr->sh_info)
7029 iverneed->vn_nextref = iverneed + 1;
7031 iverneed->vn_nextref = NULL;
7033 if (iverneed->vn_next
7034 > (size_t) (contents_end - (bfd_byte *) everneed))
7035 goto error_return_verref;
7037 everneed = ((Elf_External_Verneed *)
7038 ((bfd_byte *) everneed + iverneed->vn_next));
7045 if (elf_dynverdef (abfd) != 0)
7047 Elf_Internal_Shdr *hdr;
7048 Elf_External_Verdef *everdef;
7049 Elf_Internal_Verdef *iverdef;
7050 Elf_Internal_Verdef *iverdefarr;
7051 Elf_Internal_Verdef iverdefmem;
7053 unsigned int maxidx;
7054 bfd_byte *contents_end_def, *contents_end_aux;
7056 hdr = &elf_tdata (abfd)->dynverdef_hdr;
7058 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
7059 if (contents == NULL)
7061 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
7062 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
7065 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verdef))
7068 BFD_ASSERT (sizeof (Elf_External_Verdef)
7069 >= sizeof (Elf_External_Verdaux));
7070 contents_end_def = contents + hdr->sh_size
7071 - sizeof (Elf_External_Verdef);
7072 contents_end_aux = contents + hdr->sh_size
7073 - sizeof (Elf_External_Verdaux);
7075 /* We know the number of entries in the section but not the maximum
7076 index. Therefore we have to run through all entries and find
7078 everdef = (Elf_External_Verdef *) contents;
7080 for (i = 0; i < hdr->sh_info; ++i)
7082 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
7084 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
7085 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
7087 if (iverdefmem.vd_next
7088 > (size_t) (contents_end_def - (bfd_byte *) everdef))
7091 everdef = ((Elf_External_Verdef *)
7092 ((bfd_byte *) everdef + iverdefmem.vd_next));
7095 if (default_imported_symver)
7097 if (freeidx > maxidx)
7102 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
7103 bfd_zalloc2 (abfd, maxidx, sizeof (Elf_Internal_Verdef));
7104 if (elf_tdata (abfd)->verdef == NULL)
7107 elf_tdata (abfd)->cverdefs = maxidx;
7109 everdef = (Elf_External_Verdef *) contents;
7110 iverdefarr = elf_tdata (abfd)->verdef;
7111 for (i = 0; i < hdr->sh_info; i++)
7113 Elf_External_Verdaux *everdaux;
7114 Elf_Internal_Verdaux *iverdaux;
7117 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
7119 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
7121 error_return_verdef:
7122 elf_tdata (abfd)->verdef = NULL;
7123 elf_tdata (abfd)->cverdefs = 0;
7127 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
7128 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
7130 iverdef->vd_bfd = abfd;
7132 if (iverdef->vd_cnt == 0)
7133 iverdef->vd_auxptr = NULL;
7136 iverdef->vd_auxptr = (struct elf_internal_verdaux *)
7137 bfd_alloc2 (abfd, iverdef->vd_cnt,
7138 sizeof (Elf_Internal_Verdaux));
7139 if (iverdef->vd_auxptr == NULL)
7140 goto error_return_verdef;
7144 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
7145 goto error_return_verdef;
7147 everdaux = ((Elf_External_Verdaux *)
7148 ((bfd_byte *) everdef + iverdef->vd_aux));
7149 iverdaux = iverdef->vd_auxptr;
7150 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
7152 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
7154 iverdaux->vda_nodename =
7155 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
7156 iverdaux->vda_name);
7157 if (iverdaux->vda_nodename == NULL)
7158 goto error_return_verdef;
7160 if (j + 1 < iverdef->vd_cnt)
7161 iverdaux->vda_nextptr = iverdaux + 1;
7163 iverdaux->vda_nextptr = NULL;
7165 if (iverdaux->vda_next
7166 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
7167 goto error_return_verdef;
7169 everdaux = ((Elf_External_Verdaux *)
7170 ((bfd_byte *) everdaux + iverdaux->vda_next));
7173 if (iverdef->vd_cnt)
7174 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
7176 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
7177 iverdef->vd_nextdef = iverdef + 1;
7179 iverdef->vd_nextdef = NULL;
7181 everdef = ((Elf_External_Verdef *)
7182 ((bfd_byte *) everdef + iverdef->vd_next));
7188 else if (default_imported_symver)
7195 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
7196 bfd_zalloc2 (abfd, freeidx, sizeof (Elf_Internal_Verdef));
7197 if (elf_tdata (abfd)->verdef == NULL)
7200 elf_tdata (abfd)->cverdefs = freeidx;
7203 /* Create a default version based on the soname. */
7204 if (default_imported_symver)
7206 Elf_Internal_Verdef *iverdef;
7207 Elf_Internal_Verdaux *iverdaux;
7209 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];;
7211 iverdef->vd_version = VER_DEF_CURRENT;
7212 iverdef->vd_flags = 0;
7213 iverdef->vd_ndx = freeidx;
7214 iverdef->vd_cnt = 1;
7216 iverdef->vd_bfd = abfd;
7218 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
7219 if (iverdef->vd_nodename == NULL)
7220 goto error_return_verdef;
7221 iverdef->vd_nextdef = NULL;
7222 iverdef->vd_auxptr = (struct elf_internal_verdaux *)
7223 bfd_alloc (abfd, sizeof (Elf_Internal_Verdaux));
7224 if (iverdef->vd_auxptr == NULL)
7225 goto error_return_verdef;
7227 iverdaux = iverdef->vd_auxptr;
7228 iverdaux->vda_nodename = iverdef->vd_nodename;
7229 iverdaux->vda_nextptr = NULL;
7235 if (contents != NULL)
7241 _bfd_elf_make_empty_symbol (bfd *abfd)
7243 elf_symbol_type *newsym;
7244 bfd_size_type amt = sizeof (elf_symbol_type);
7246 newsym = (elf_symbol_type *) bfd_zalloc (abfd, amt);
7251 newsym->symbol.the_bfd = abfd;
7252 return &newsym->symbol;
7257 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
7261 bfd_symbol_info (symbol, ret);
7264 /* Return whether a symbol name implies a local symbol. Most targets
7265 use this function for the is_local_label_name entry point, but some
7269 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
7272 /* Normal local symbols start with ``.L''. */
7273 if (name[0] == '.' && name[1] == 'L')
7276 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
7277 DWARF debugging symbols starting with ``..''. */
7278 if (name[0] == '.' && name[1] == '.')
7281 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
7282 emitting DWARF debugging output. I suspect this is actually a
7283 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
7284 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
7285 underscore to be emitted on some ELF targets). For ease of use,
7286 we treat such symbols as local. */
7287 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
7294 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
7295 asymbol *symbol ATTRIBUTE_UNUSED)
7302 _bfd_elf_set_arch_mach (bfd *abfd,
7303 enum bfd_architecture arch,
7304 unsigned long machine)
7306 /* If this isn't the right architecture for this backend, and this
7307 isn't the generic backend, fail. */
7308 if (arch != get_elf_backend_data (abfd)->arch
7309 && arch != bfd_arch_unknown
7310 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
7313 return bfd_default_set_arch_mach (abfd, arch, machine);
7316 /* Find the function to a particular section and offset,
7317 for error reporting. */
7320 elf_find_function (bfd *abfd,
7324 const char **filename_ptr,
7325 const char **functionname_ptr)
7327 const char *filename;
7328 asymbol *func, *file;
7331 /* ??? Given multiple file symbols, it is impossible to reliably
7332 choose the right file name for global symbols. File symbols are
7333 local symbols, and thus all file symbols must sort before any
7334 global symbols. The ELF spec may be interpreted to say that a
7335 file symbol must sort before other local symbols, but currently
7336 ld -r doesn't do this. So, for ld -r output, it is possible to
7337 make a better choice of file name for local symbols by ignoring
7338 file symbols appearing after a given local symbol. */
7339 enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
7340 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7346 state = nothing_seen;
7348 for (p = symbols; *p != NULL; p++)
7353 q = (elf_symbol_type *) *p;
7355 type = ELF_ST_TYPE (q->internal_elf_sym.st_info);
7360 if (state == symbol_seen)
7361 state = file_after_symbol_seen;
7364 if (!bed->is_function_type (type))
7367 if (bfd_get_section (&q->symbol) == section
7368 && q->symbol.value >= low_func
7369 && q->symbol.value <= offset)
7371 func = (asymbol *) q;
7372 low_func = q->symbol.value;
7375 && (ELF_ST_BIND (q->internal_elf_sym.st_info) == STB_LOCAL
7376 || state != file_after_symbol_seen))
7377 filename = bfd_asymbol_name (file);
7381 if (state == nothing_seen)
7382 state = symbol_seen;
7389 *filename_ptr = filename;
7390 if (functionname_ptr)
7391 *functionname_ptr = bfd_asymbol_name (func);
7396 /* Find the nearest line to a particular section and offset,
7397 for error reporting. */
7400 _bfd_elf_find_nearest_line (bfd *abfd,
7404 const char **filename_ptr,
7405 const char **functionname_ptr,
7406 unsigned int *line_ptr)
7410 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
7411 filename_ptr, functionname_ptr,
7414 if (!*functionname_ptr)
7415 elf_find_function (abfd, section, symbols, offset,
7416 *filename_ptr ? NULL : filename_ptr,
7422 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
7423 filename_ptr, functionname_ptr,
7425 &elf_tdata (abfd)->dwarf2_find_line_info))
7427 if (!*functionname_ptr)
7428 elf_find_function (abfd, section, symbols, offset,
7429 *filename_ptr ? NULL : filename_ptr,
7435 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
7436 &found, filename_ptr,
7437 functionname_ptr, line_ptr,
7438 &elf_tdata (abfd)->line_info))
7440 if (found && (*functionname_ptr || *line_ptr))
7443 if (symbols == NULL)
7446 if (! elf_find_function (abfd, section, symbols, offset,
7447 filename_ptr, functionname_ptr))
7454 /* Find the line for a symbol. */
7457 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
7458 const char **filename_ptr, unsigned int *line_ptr)
7460 return _bfd_dwarf2_find_line (abfd, symbols, symbol,
7461 filename_ptr, line_ptr, 0,
7462 &elf_tdata (abfd)->dwarf2_find_line_info);
7465 /* After a call to bfd_find_nearest_line, successive calls to
7466 bfd_find_inliner_info can be used to get source information about
7467 each level of function inlining that terminated at the address
7468 passed to bfd_find_nearest_line. Currently this is only supported
7469 for DWARF2 with appropriate DWARF3 extensions. */
7472 _bfd_elf_find_inliner_info (bfd *abfd,
7473 const char **filename_ptr,
7474 const char **functionname_ptr,
7475 unsigned int *line_ptr)
7478 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
7479 functionname_ptr, line_ptr,
7480 & elf_tdata (abfd)->dwarf2_find_line_info);
7485 _bfd_elf_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
7487 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7488 int ret = bed->s->sizeof_ehdr;
7490 if (!info->relocatable)
7492 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
7494 if (phdr_size == (bfd_size_type) -1)
7496 struct elf_segment_map *m;
7499 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
7500 phdr_size += bed->s->sizeof_phdr;
7503 phdr_size = get_program_header_size (abfd, info);
7506 elf_tdata (abfd)->program_header_size = phdr_size;
7514 _bfd_elf_set_section_contents (bfd *abfd,
7516 const void *location,
7518 bfd_size_type count)
7520 Elf_Internal_Shdr *hdr;
7523 if (! abfd->output_has_begun
7524 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
7527 hdr = &elf_section_data (section)->this_hdr;
7528 pos = hdr->sh_offset + offset;
7529 if (bfd_seek (abfd, pos, SEEK_SET) != 0
7530 || bfd_bwrite (location, count, abfd) != count)
7537 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
7538 arelent *cache_ptr ATTRIBUTE_UNUSED,
7539 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
7544 /* Try to convert a non-ELF reloc into an ELF one. */
7547 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
7549 /* Check whether we really have an ELF howto. */
7551 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
7553 bfd_reloc_code_real_type code;
7554 reloc_howto_type *howto;
7556 /* Alien reloc: Try to determine its type to replace it with an
7557 equivalent ELF reloc. */
7559 if (areloc->howto->pc_relative)
7561 switch (areloc->howto->bitsize)
7564 code = BFD_RELOC_8_PCREL;
7567 code = BFD_RELOC_12_PCREL;
7570 code = BFD_RELOC_16_PCREL;
7573 code = BFD_RELOC_24_PCREL;
7576 code = BFD_RELOC_32_PCREL;
7579 code = BFD_RELOC_64_PCREL;
7585 howto = bfd_reloc_type_lookup (abfd, code);
7587 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
7589 if (howto->pcrel_offset)
7590 areloc->addend += areloc->address;
7592 areloc->addend -= areloc->address; /* addend is unsigned!! */
7597 switch (areloc->howto->bitsize)
7603 code = BFD_RELOC_14;
7606 code = BFD_RELOC_16;
7609 code = BFD_RELOC_26;
7612 code = BFD_RELOC_32;
7615 code = BFD_RELOC_64;
7621 howto = bfd_reloc_type_lookup (abfd, code);
7625 areloc->howto = howto;
7633 (*_bfd_error_handler)
7634 (_("%B: unsupported relocation type %s"),
7635 abfd, areloc->howto->name);
7636 bfd_set_error (bfd_error_bad_value);
7641 _bfd_elf_close_and_cleanup (bfd *abfd)
7643 if (bfd_get_format (abfd) == bfd_object)
7645 if (elf_tdata (abfd) != NULL && elf_shstrtab (abfd) != NULL)
7646 _bfd_elf_strtab_free (elf_shstrtab (abfd));
7647 _bfd_dwarf2_cleanup_debug_info (abfd);
7650 return _bfd_generic_close_and_cleanup (abfd);
7653 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
7654 in the relocation's offset. Thus we cannot allow any sort of sanity
7655 range-checking to interfere. There is nothing else to do in processing
7658 bfd_reloc_status_type
7659 _bfd_elf_rel_vtable_reloc_fn
7660 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
7661 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
7662 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
7663 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
7665 return bfd_reloc_ok;
7668 /* Elf core file support. Much of this only works on native
7669 toolchains, since we rely on knowing the
7670 machine-dependent procfs structure in order to pick
7671 out details about the corefile. */
7673 #ifdef HAVE_SYS_PROCFS_H
7674 /* Needed for new procfs interface on sparc-solaris. */
7675 # define _STRUCTURED_PROC 1
7676 # include <sys/procfs.h>
7679 /* Return a PID that identifies a "thread" for threaded cores, or the
7680 PID of the main process for non-threaded cores. */
7683 elfcore_make_pid (bfd *abfd)
7687 pid = elf_tdata (abfd)->core_lwpid;
7689 pid = elf_tdata (abfd)->core_pid;
7694 /* If there isn't a section called NAME, make one, using
7695 data from SECT. Note, this function will generate a
7696 reference to NAME, so you shouldn't deallocate or
7700 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
7704 if (bfd_get_section_by_name (abfd, name) != NULL)
7707 sect2 = bfd_make_section_with_flags (abfd, name, sect->flags);
7711 sect2->size = sect->size;
7712 sect2->filepos = sect->filepos;
7713 sect2->alignment_power = sect->alignment_power;
7717 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
7718 actually creates up to two pseudosections:
7719 - For the single-threaded case, a section named NAME, unless
7720 such a section already exists.
7721 - For the multi-threaded case, a section named "NAME/PID", where
7722 PID is elfcore_make_pid (abfd).
7723 Both pseudosections have identical contents. */
7725 _bfd_elfcore_make_pseudosection (bfd *abfd,
7731 char *threaded_name;
7735 /* Build the section name. */
7737 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
7738 len = strlen (buf) + 1;
7739 threaded_name = (char *) bfd_alloc (abfd, len);
7740 if (threaded_name == NULL)
7742 memcpy (threaded_name, buf, len);
7744 sect = bfd_make_section_anyway_with_flags (abfd, threaded_name,
7749 sect->filepos = filepos;
7750 sect->alignment_power = 2;
7752 return elfcore_maybe_make_sect (abfd, name, sect);
7755 /* prstatus_t exists on:
7757 linux 2.[01] + glibc
7761 #if defined (HAVE_PRSTATUS_T)
7764 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
7769 if (note->descsz == sizeof (prstatus_t))
7773 size = sizeof (prstat.pr_reg);
7774 offset = offsetof (prstatus_t, pr_reg);
7775 memcpy (&prstat, note->descdata, sizeof (prstat));
7777 /* Do not overwrite the core signal if it
7778 has already been set by another thread. */
7779 if (elf_tdata (abfd)->core_signal == 0)
7780 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7781 if (elf_tdata (abfd)->core_pid == 0)
7782 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7784 /* pr_who exists on:
7787 pr_who doesn't exist on:
7790 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7791 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7793 elf_tdata (abfd)->core_lwpid = prstat.pr_pid;
7796 #if defined (HAVE_PRSTATUS32_T)
7797 else if (note->descsz == sizeof (prstatus32_t))
7799 /* 64-bit host, 32-bit corefile */
7800 prstatus32_t prstat;
7802 size = sizeof (prstat.pr_reg);
7803 offset = offsetof (prstatus32_t, pr_reg);
7804 memcpy (&prstat, note->descdata, sizeof (prstat));
7806 /* Do not overwrite the core signal if it
7807 has already been set by another thread. */
7808 if (elf_tdata (abfd)->core_signal == 0)
7809 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7810 if (elf_tdata (abfd)->core_pid == 0)
7811 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7813 /* pr_who exists on:
7816 pr_who doesn't exist on:
7819 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7820 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7822 elf_tdata (abfd)->core_lwpid = prstat.pr_pid;
7825 #endif /* HAVE_PRSTATUS32_T */
7828 /* Fail - we don't know how to handle any other
7829 note size (ie. data object type). */
7833 /* Make a ".reg/999" section and a ".reg" section. */
7834 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
7835 size, note->descpos + offset);
7837 #endif /* defined (HAVE_PRSTATUS_T) */
7839 /* Create a pseudosection containing the exact contents of NOTE. */
7841 elfcore_make_note_pseudosection (bfd *abfd,
7843 Elf_Internal_Note *note)
7845 return _bfd_elfcore_make_pseudosection (abfd, name,
7846 note->descsz, note->descpos);
7849 /* There isn't a consistent prfpregset_t across platforms,
7850 but it doesn't matter, because we don't have to pick this
7851 data structure apart. */
7854 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
7856 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7859 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7860 type of NT_PRXFPREG. Just include the whole note's contents
7864 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
7866 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
7869 /* Linux dumps the Intel XSAVE extended state in a note named "LINUX"
7870 with a note type of NT_X86_XSTATE. Just include the whole note's
7871 contents literally. */
7874 elfcore_grok_xstatereg (bfd *abfd, Elf_Internal_Note *note)
7876 return elfcore_make_note_pseudosection (abfd, ".reg-xstate", note);
7880 elfcore_grok_ppc_vmx (bfd *abfd, Elf_Internal_Note *note)
7882 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vmx", note);
7886 elfcore_grok_ppc_vsx (bfd *abfd, Elf_Internal_Note *note)
7888 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vsx", note);
7892 elfcore_grok_s390_high_gprs (bfd *abfd, Elf_Internal_Note *note)
7894 return elfcore_make_note_pseudosection (abfd, ".reg-s390-high-gprs", note);
7898 elfcore_grok_s390_timer (bfd *abfd, Elf_Internal_Note *note)
7900 return elfcore_make_note_pseudosection (abfd, ".reg-s390-timer", note);
7904 elfcore_grok_s390_todcmp (bfd *abfd, Elf_Internal_Note *note)
7906 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todcmp", note);
7910 elfcore_grok_s390_todpreg (bfd *abfd, Elf_Internal_Note *note)
7912 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todpreg", note);
7916 elfcore_grok_s390_ctrs (bfd *abfd, Elf_Internal_Note *note)
7918 return elfcore_make_note_pseudosection (abfd, ".reg-s390-ctrs", note);
7922 elfcore_grok_s390_prefix (bfd *abfd, Elf_Internal_Note *note)
7924 return elfcore_make_note_pseudosection (abfd, ".reg-s390-prefix", note);
7927 #if defined (HAVE_PRPSINFO_T)
7928 typedef prpsinfo_t elfcore_psinfo_t;
7929 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7930 typedef prpsinfo32_t elfcore_psinfo32_t;
7934 #if defined (HAVE_PSINFO_T)
7935 typedef psinfo_t elfcore_psinfo_t;
7936 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7937 typedef psinfo32_t elfcore_psinfo32_t;
7941 /* return a malloc'ed copy of a string at START which is at
7942 most MAX bytes long, possibly without a terminating '\0'.
7943 the copy will always have a terminating '\0'. */
7946 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
7949 char *end = (char *) memchr (start, '\0', max);
7957 dups = (char *) bfd_alloc (abfd, len + 1);
7961 memcpy (dups, start, len);
7967 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7969 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
7971 if (note->descsz == sizeof (elfcore_psinfo_t))
7973 elfcore_psinfo_t psinfo;
7975 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7977 elf_tdata (abfd)->core_program
7978 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7979 sizeof (psinfo.pr_fname));
7981 elf_tdata (abfd)->core_command
7982 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7983 sizeof (psinfo.pr_psargs));
7985 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7986 else if (note->descsz == sizeof (elfcore_psinfo32_t))
7988 /* 64-bit host, 32-bit corefile */
7989 elfcore_psinfo32_t psinfo;
7991 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7993 elf_tdata (abfd)->core_program
7994 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7995 sizeof (psinfo.pr_fname));
7997 elf_tdata (abfd)->core_command
7998 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7999 sizeof (psinfo.pr_psargs));
8005 /* Fail - we don't know how to handle any other
8006 note size (ie. data object type). */
8010 /* Note that for some reason, a spurious space is tacked
8011 onto the end of the args in some (at least one anyway)
8012 implementations, so strip it off if it exists. */
8015 char *command = elf_tdata (abfd)->core_command;
8016 int n = strlen (command);
8018 if (0 < n && command[n - 1] == ' ')
8019 command[n - 1] = '\0';
8024 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
8026 #if defined (HAVE_PSTATUS_T)
8028 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
8030 if (note->descsz == sizeof (pstatus_t)
8031 #if defined (HAVE_PXSTATUS_T)
8032 || note->descsz == sizeof (pxstatus_t)
8038 memcpy (&pstat, note->descdata, sizeof (pstat));
8040 elf_tdata (abfd)->core_pid = pstat.pr_pid;
8042 #if defined (HAVE_PSTATUS32_T)
8043 else if (note->descsz == sizeof (pstatus32_t))
8045 /* 64-bit host, 32-bit corefile */
8048 memcpy (&pstat, note->descdata, sizeof (pstat));
8050 elf_tdata (abfd)->core_pid = pstat.pr_pid;
8053 /* Could grab some more details from the "representative"
8054 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
8055 NT_LWPSTATUS note, presumably. */
8059 #endif /* defined (HAVE_PSTATUS_T) */
8061 #if defined (HAVE_LWPSTATUS_T)
8063 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
8065 lwpstatus_t lwpstat;
8071 if (note->descsz != sizeof (lwpstat)
8072 #if defined (HAVE_LWPXSTATUS_T)
8073 && note->descsz != sizeof (lwpxstatus_t)
8078 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
8080 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
8081 /* Do not overwrite the core signal if it has already been set by
8083 if (elf_tdata (abfd)->core_signal == 0)
8084 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
8086 /* Make a ".reg/999" section. */
8088 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
8089 len = strlen (buf) + 1;
8090 name = bfd_alloc (abfd, len);
8093 memcpy (name, buf, len);
8095 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8099 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8100 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
8101 sect->filepos = note->descpos
8102 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
8105 #if defined (HAVE_LWPSTATUS_T_PR_REG)
8106 sect->size = sizeof (lwpstat.pr_reg);
8107 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
8110 sect->alignment_power = 2;
8112 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
8115 /* Make a ".reg2/999" section */
8117 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
8118 len = strlen (buf) + 1;
8119 name = bfd_alloc (abfd, len);
8122 memcpy (name, buf, len);
8124 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8128 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8129 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
8130 sect->filepos = note->descpos
8131 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
8134 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
8135 sect->size = sizeof (lwpstat.pr_fpreg);
8136 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
8139 sect->alignment_power = 2;
8141 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
8143 #endif /* defined (HAVE_LWPSTATUS_T) */
8146 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
8153 int is_active_thread;
8156 if (note->descsz < 728)
8159 if (! CONST_STRNEQ (note->namedata, "win32"))
8162 type = bfd_get_32 (abfd, note->descdata);
8166 case 1 /* NOTE_INFO_PROCESS */:
8167 /* FIXME: need to add ->core_command. */
8168 /* process_info.pid */
8169 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 8);
8170 /* process_info.signal */
8171 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 12);
8174 case 2 /* NOTE_INFO_THREAD */:
8175 /* Make a ".reg/999" section. */
8176 /* thread_info.tid */
8177 sprintf (buf, ".reg/%ld", (long) bfd_get_32 (abfd, note->descdata + 8));
8179 len = strlen (buf) + 1;
8180 name = (char *) bfd_alloc (abfd, len);
8184 memcpy (name, buf, len);
8186 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8190 /* sizeof (thread_info.thread_context) */
8192 /* offsetof (thread_info.thread_context) */
8193 sect->filepos = note->descpos + 12;
8194 sect->alignment_power = 2;
8196 /* thread_info.is_active_thread */
8197 is_active_thread = bfd_get_32 (abfd, note->descdata + 8);
8199 if (is_active_thread)
8200 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
8204 case 3 /* NOTE_INFO_MODULE */:
8205 /* Make a ".module/xxxxxxxx" section. */
8206 /* module_info.base_address */
8207 base_addr = bfd_get_32 (abfd, note->descdata + 4);
8208 sprintf (buf, ".module/%08lx", (unsigned long) base_addr);
8210 len = strlen (buf) + 1;
8211 name = (char *) bfd_alloc (abfd, len);
8215 memcpy (name, buf, len);
8217 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8222 sect->size = note->descsz;
8223 sect->filepos = note->descpos;
8224 sect->alignment_power = 2;
8235 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
8237 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8245 if (bed->elf_backend_grok_prstatus)
8246 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
8248 #if defined (HAVE_PRSTATUS_T)
8249 return elfcore_grok_prstatus (abfd, note);
8254 #if defined (HAVE_PSTATUS_T)
8256 return elfcore_grok_pstatus (abfd, note);
8259 #if defined (HAVE_LWPSTATUS_T)
8261 return elfcore_grok_lwpstatus (abfd, note);
8264 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
8265 return elfcore_grok_prfpreg (abfd, note);
8267 case NT_WIN32PSTATUS:
8268 return elfcore_grok_win32pstatus (abfd, note);
8270 case NT_PRXFPREG: /* Linux SSE extension */
8271 if (note->namesz == 6
8272 && strcmp (note->namedata, "LINUX") == 0)
8273 return elfcore_grok_prxfpreg (abfd, note);
8277 case NT_X86_XSTATE: /* Linux XSAVE extension */
8278 if (note->namesz == 6
8279 && strcmp (note->namedata, "LINUX") == 0)
8280 return elfcore_grok_xstatereg (abfd, note);
8285 if (note->namesz == 6
8286 && strcmp (note->namedata, "LINUX") == 0)
8287 return elfcore_grok_ppc_vmx (abfd, note);
8292 if (note->namesz == 6
8293 && strcmp (note->namedata, "LINUX") == 0)
8294 return elfcore_grok_ppc_vsx (abfd, note);
8298 case NT_S390_HIGH_GPRS:
8299 if (note->namesz == 6
8300 && strcmp (note->namedata, "LINUX") == 0)
8301 return elfcore_grok_s390_high_gprs (abfd, note);
8306 if (note->namesz == 6
8307 && strcmp (note->namedata, "LINUX") == 0)
8308 return elfcore_grok_s390_timer (abfd, note);
8312 case NT_S390_TODCMP:
8313 if (note->namesz == 6
8314 && strcmp (note->namedata, "LINUX") == 0)
8315 return elfcore_grok_s390_todcmp (abfd, note);
8319 case NT_S390_TODPREG:
8320 if (note->namesz == 6
8321 && strcmp (note->namedata, "LINUX") == 0)
8322 return elfcore_grok_s390_todpreg (abfd, note);
8327 if (note->namesz == 6
8328 && strcmp (note->namedata, "LINUX") == 0)
8329 return elfcore_grok_s390_ctrs (abfd, note);
8333 case NT_S390_PREFIX:
8334 if (note->namesz == 6
8335 && strcmp (note->namedata, "LINUX") == 0)
8336 return elfcore_grok_s390_prefix (abfd, note);
8342 if (bed->elf_backend_grok_psinfo)
8343 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
8345 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8346 return elfcore_grok_psinfo (abfd, note);
8353 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
8358 sect->size = note->descsz;
8359 sect->filepos = note->descpos;
8360 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8368 elfobj_grok_gnu_build_id (bfd *abfd, Elf_Internal_Note *note)
8370 elf_tdata (abfd)->build_id_size = note->descsz;
8371 elf_tdata (abfd)->build_id = (bfd_byte *) bfd_alloc (abfd, note->descsz);
8372 if (elf_tdata (abfd)->build_id == NULL)
8375 memcpy (elf_tdata (abfd)->build_id, note->descdata, note->descsz);
8381 elfobj_grok_gnu_note (bfd *abfd, Elf_Internal_Note *note)
8388 case NT_GNU_BUILD_ID:
8389 return elfobj_grok_gnu_build_id (abfd, note);
8394 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
8398 cp = strchr (note->namedata, '@');
8401 *lwpidp = atoi(cp + 1);
8408 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
8410 /* Signal number at offset 0x08. */
8411 elf_tdata (abfd)->core_signal
8412 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
8414 /* Process ID at offset 0x50. */
8415 elf_tdata (abfd)->core_pid
8416 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
8418 /* Command name at 0x7c (max 32 bytes, including nul). */
8419 elf_tdata (abfd)->core_command
8420 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
8422 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
8427 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
8431 if (elfcore_netbsd_get_lwpid (note, &lwp))
8432 elf_tdata (abfd)->core_lwpid = lwp;
8434 if (note->type == NT_NETBSDCORE_PROCINFO)
8436 /* NetBSD-specific core "procinfo". Note that we expect to
8437 find this note before any of the others, which is fine,
8438 since the kernel writes this note out first when it
8439 creates a core file. */
8441 return elfcore_grok_netbsd_procinfo (abfd, note);
8444 /* As of Jan 2002 there are no other machine-independent notes
8445 defined for NetBSD core files. If the note type is less
8446 than the start of the machine-dependent note types, we don't
8449 if (note->type < NT_NETBSDCORE_FIRSTMACH)
8453 switch (bfd_get_arch (abfd))
8455 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
8456 PT_GETFPREGS == mach+2. */
8458 case bfd_arch_alpha:
8459 case bfd_arch_sparc:
8462 case NT_NETBSDCORE_FIRSTMACH+0:
8463 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8465 case NT_NETBSDCORE_FIRSTMACH+2:
8466 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8472 /* On all other arch's, PT_GETREGS == mach+1 and
8473 PT_GETFPREGS == mach+3. */
8478 case NT_NETBSDCORE_FIRSTMACH+1:
8479 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8481 case NT_NETBSDCORE_FIRSTMACH+3:
8482 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8492 elfcore_grok_openbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
8494 /* Signal number at offset 0x08. */
8495 elf_tdata (abfd)->core_signal
8496 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
8498 /* Process ID at offset 0x20. */
8499 elf_tdata (abfd)->core_pid
8500 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x20);
8502 /* Command name at 0x48 (max 32 bytes, including nul). */
8503 elf_tdata (abfd)->core_command
8504 = _bfd_elfcore_strndup (abfd, note->descdata + 0x48, 31);
8510 elfcore_grok_openbsd_note (bfd *abfd, Elf_Internal_Note *note)
8512 if (note->type == NT_OPENBSD_PROCINFO)
8513 return elfcore_grok_openbsd_procinfo (abfd, note);
8515 if (note->type == NT_OPENBSD_REGS)
8516 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8518 if (note->type == NT_OPENBSD_FPREGS)
8519 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8521 if (note->type == NT_OPENBSD_XFPREGS)
8522 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
8524 if (note->type == NT_OPENBSD_AUXV)
8526 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
8531 sect->size = note->descsz;
8532 sect->filepos = note->descpos;
8533 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8538 if (note->type == NT_OPENBSD_WCOOKIE)
8540 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".wcookie",
8545 sect->size = note->descsz;
8546 sect->filepos = note->descpos;
8547 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8556 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, long *tid)
8558 void *ddata = note->descdata;
8565 /* nto_procfs_status 'pid' field is at offset 0. */
8566 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
8568 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
8569 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
8571 /* nto_procfs_status 'flags' field is at offset 8. */
8572 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
8574 /* nto_procfs_status 'what' field is at offset 14. */
8575 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
8577 elf_tdata (abfd)->core_signal = sig;
8578 elf_tdata (abfd)->core_lwpid = *tid;
8581 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
8582 do not come from signals so we make sure we set the current
8583 thread just in case. */
8584 if (flags & 0x00000080)
8585 elf_tdata (abfd)->core_lwpid = *tid;
8587 /* Make a ".qnx_core_status/%d" section. */
8588 sprintf (buf, ".qnx_core_status/%ld", *tid);
8590 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
8595 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8599 sect->size = note->descsz;
8600 sect->filepos = note->descpos;
8601 sect->alignment_power = 2;
8603 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
8607 elfcore_grok_nto_regs (bfd *abfd,
8608 Elf_Internal_Note *note,
8616 /* Make a "(base)/%d" section. */
8617 sprintf (buf, "%s/%ld", base, tid);
8619 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
8624 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8628 sect->size = note->descsz;
8629 sect->filepos = note->descpos;
8630 sect->alignment_power = 2;
8632 /* This is the current thread. */
8633 if (elf_tdata (abfd)->core_lwpid == tid)
8634 return elfcore_maybe_make_sect (abfd, base, sect);
8639 #define BFD_QNT_CORE_INFO 7
8640 #define BFD_QNT_CORE_STATUS 8
8641 #define BFD_QNT_CORE_GREG 9
8642 #define BFD_QNT_CORE_FPREG 10
8645 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
8647 /* Every GREG section has a STATUS section before it. Store the
8648 tid from the previous call to pass down to the next gregs
8650 static long tid = 1;
8654 case BFD_QNT_CORE_INFO:
8655 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
8656 case BFD_QNT_CORE_STATUS:
8657 return elfcore_grok_nto_status (abfd, note, &tid);
8658 case BFD_QNT_CORE_GREG:
8659 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
8660 case BFD_QNT_CORE_FPREG:
8661 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
8668 elfcore_grok_spu_note (bfd *abfd, Elf_Internal_Note *note)
8674 /* Use note name as section name. */
8676 name = (char *) bfd_alloc (abfd, len);
8679 memcpy (name, note->namedata, len);
8680 name[len - 1] = '\0';
8682 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8686 sect->size = note->descsz;
8687 sect->filepos = note->descpos;
8688 sect->alignment_power = 1;
8693 /* Function: elfcore_write_note
8696 buffer to hold note, and current size of buffer
8700 size of data for note
8702 Writes note to end of buffer. ELF64 notes are written exactly as
8703 for ELF32, despite the current (as of 2006) ELF gabi specifying
8704 that they ought to have 8-byte namesz and descsz field, and have
8705 8-byte alignment. Other writers, eg. Linux kernel, do the same.
8708 Pointer to realloc'd buffer, *BUFSIZ updated. */
8711 elfcore_write_note (bfd *abfd,
8719 Elf_External_Note *xnp;
8726 namesz = strlen (name) + 1;
8728 newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4);
8730 buf = (char *) realloc (buf, *bufsiz + newspace);
8733 dest = buf + *bufsiz;
8734 *bufsiz += newspace;
8735 xnp = (Elf_External_Note *) dest;
8736 H_PUT_32 (abfd, namesz, xnp->namesz);
8737 H_PUT_32 (abfd, size, xnp->descsz);
8738 H_PUT_32 (abfd, type, xnp->type);
8742 memcpy (dest, name, namesz);
8750 memcpy (dest, input, size);
8760 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8762 elfcore_write_prpsinfo (bfd *abfd,
8768 const char *note_name = "CORE";
8769 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8771 if (bed->elf_backend_write_core_note != NULL)
8774 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8775 NT_PRPSINFO, fname, psargs);
8780 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
8781 if (bed->s->elfclass == ELFCLASS32)
8783 #if defined (HAVE_PSINFO32_T)
8785 int note_type = NT_PSINFO;
8788 int note_type = NT_PRPSINFO;
8791 memset (&data, 0, sizeof (data));
8792 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8793 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8794 return elfcore_write_note (abfd, buf, bufsiz,
8795 note_name, note_type, &data, sizeof (data));
8800 #if defined (HAVE_PSINFO_T)
8802 int note_type = NT_PSINFO;
8805 int note_type = NT_PRPSINFO;
8808 memset (&data, 0, sizeof (data));
8809 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8810 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8811 return elfcore_write_note (abfd, buf, bufsiz,
8812 note_name, note_type, &data, sizeof (data));
8815 #endif /* PSINFO_T or PRPSINFO_T */
8817 #if defined (HAVE_PRSTATUS_T)
8819 elfcore_write_prstatus (bfd *abfd,
8826 const char *note_name = "CORE";
8827 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8829 if (bed->elf_backend_write_core_note != NULL)
8832 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8834 pid, cursig, gregs);
8839 #if defined (HAVE_PRSTATUS32_T)
8840 if (bed->s->elfclass == ELFCLASS32)
8842 prstatus32_t prstat;
8844 memset (&prstat, 0, sizeof (prstat));
8845 prstat.pr_pid = pid;
8846 prstat.pr_cursig = cursig;
8847 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8848 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8849 NT_PRSTATUS, &prstat, sizeof (prstat));
8856 memset (&prstat, 0, sizeof (prstat));
8857 prstat.pr_pid = pid;
8858 prstat.pr_cursig = cursig;
8859 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8860 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8861 NT_PRSTATUS, &prstat, sizeof (prstat));
8864 #endif /* HAVE_PRSTATUS_T */
8866 #if defined (HAVE_LWPSTATUS_T)
8868 elfcore_write_lwpstatus (bfd *abfd,
8875 lwpstatus_t lwpstat;
8876 const char *note_name = "CORE";
8878 memset (&lwpstat, 0, sizeof (lwpstat));
8879 lwpstat.pr_lwpid = pid >> 16;
8880 lwpstat.pr_cursig = cursig;
8881 #if defined (HAVE_LWPSTATUS_T_PR_REG)
8882 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
8883 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8885 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
8886 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
8888 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
8889 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
8892 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8893 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
8895 #endif /* HAVE_LWPSTATUS_T */
8897 #if defined (HAVE_PSTATUS_T)
8899 elfcore_write_pstatus (bfd *abfd,
8903 int cursig ATTRIBUTE_UNUSED,
8904 const void *gregs ATTRIBUTE_UNUSED)
8906 const char *note_name = "CORE";
8907 #if defined (HAVE_PSTATUS32_T)
8908 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8910 if (bed->s->elfclass == ELFCLASS32)
8914 memset (&pstat, 0, sizeof (pstat));
8915 pstat.pr_pid = pid & 0xffff;
8916 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8917 NT_PSTATUS, &pstat, sizeof (pstat));
8925 memset (&pstat, 0, sizeof (pstat));
8926 pstat.pr_pid = pid & 0xffff;
8927 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8928 NT_PSTATUS, &pstat, sizeof (pstat));
8932 #endif /* HAVE_PSTATUS_T */
8935 elfcore_write_prfpreg (bfd *abfd,
8941 const char *note_name = "CORE";
8942 return elfcore_write_note (abfd, buf, bufsiz,
8943 note_name, NT_FPREGSET, fpregs, size);
8947 elfcore_write_prxfpreg (bfd *abfd,
8950 const void *xfpregs,
8953 char *note_name = "LINUX";
8954 return elfcore_write_note (abfd, buf, bufsiz,
8955 note_name, NT_PRXFPREG, xfpregs, size);
8959 elfcore_write_xstatereg (bfd *abfd, char *buf, int *bufsiz,
8960 const void *xfpregs, int size)
8962 char *note_name = "LINUX";
8963 return elfcore_write_note (abfd, buf, bufsiz,
8964 note_name, NT_X86_XSTATE, xfpregs, size);
8968 elfcore_write_ppc_vmx (bfd *abfd,
8971 const void *ppc_vmx,
8974 char *note_name = "LINUX";
8975 return elfcore_write_note (abfd, buf, bufsiz,
8976 note_name, NT_PPC_VMX, ppc_vmx, size);
8980 elfcore_write_ppc_vsx (bfd *abfd,
8983 const void *ppc_vsx,
8986 char *note_name = "LINUX";
8987 return elfcore_write_note (abfd, buf, bufsiz,
8988 note_name, NT_PPC_VSX, ppc_vsx, size);
8992 elfcore_write_s390_high_gprs (bfd *abfd,
8995 const void *s390_high_gprs,
8998 char *note_name = "LINUX";
8999 return elfcore_write_note (abfd, buf, bufsiz,
9000 note_name, NT_S390_HIGH_GPRS,
9001 s390_high_gprs, size);
9005 elfcore_write_s390_timer (bfd *abfd,
9008 const void *s390_timer,
9011 char *note_name = "LINUX";
9012 return elfcore_write_note (abfd, buf, bufsiz,
9013 note_name, NT_S390_TIMER, s390_timer, size);
9017 elfcore_write_s390_todcmp (bfd *abfd,
9020 const void *s390_todcmp,
9023 char *note_name = "LINUX";
9024 return elfcore_write_note (abfd, buf, bufsiz,
9025 note_name, NT_S390_TODCMP, s390_todcmp, size);
9029 elfcore_write_s390_todpreg (bfd *abfd,
9032 const void *s390_todpreg,
9035 char *note_name = "LINUX";
9036 return elfcore_write_note (abfd, buf, bufsiz,
9037 note_name, NT_S390_TODPREG, s390_todpreg, size);
9041 elfcore_write_s390_ctrs (bfd *abfd,
9044 const void *s390_ctrs,
9047 char *note_name = "LINUX";
9048 return elfcore_write_note (abfd, buf, bufsiz,
9049 note_name, NT_S390_CTRS, s390_ctrs, size);
9053 elfcore_write_s390_prefix (bfd *abfd,
9056 const void *s390_prefix,
9059 char *note_name = "LINUX";
9060 return elfcore_write_note (abfd, buf, bufsiz,
9061 note_name, NT_S390_PREFIX, s390_prefix, size);
9065 elfcore_write_register_note (bfd *abfd,
9068 const char *section,
9072 if (strcmp (section, ".reg2") == 0)
9073 return elfcore_write_prfpreg (abfd, buf, bufsiz, data, size);
9074 if (strcmp (section, ".reg-xfp") == 0)
9075 return elfcore_write_prxfpreg (abfd, buf, bufsiz, data, size);
9076 if (strcmp (section, ".reg-xstate") == 0)
9077 return elfcore_write_xstatereg (abfd, buf, bufsiz, data, size);
9078 if (strcmp (section, ".reg-ppc-vmx") == 0)
9079 return elfcore_write_ppc_vmx (abfd, buf, bufsiz, data, size);
9080 if (strcmp (section, ".reg-ppc-vsx") == 0)
9081 return elfcore_write_ppc_vsx (abfd, buf, bufsiz, data, size);
9082 if (strcmp (section, ".reg-s390-high-gprs") == 0)
9083 return elfcore_write_s390_high_gprs (abfd, buf, bufsiz, data, size);
9084 if (strcmp (section, ".reg-s390-timer") == 0)
9085 return elfcore_write_s390_timer (abfd, buf, bufsiz, data, size);
9086 if (strcmp (section, ".reg-s390-todcmp") == 0)
9087 return elfcore_write_s390_todcmp (abfd, buf, bufsiz, data, size);
9088 if (strcmp (section, ".reg-s390-todpreg") == 0)
9089 return elfcore_write_s390_todpreg (abfd, buf, bufsiz, data, size);
9090 if (strcmp (section, ".reg-s390-ctrs") == 0)
9091 return elfcore_write_s390_ctrs (abfd, buf, bufsiz, data, size);
9092 if (strcmp (section, ".reg-s390-prefix") == 0)
9093 return elfcore_write_s390_prefix (abfd, buf, bufsiz, data, size);
9098 elf_parse_notes (bfd *abfd, char *buf, size_t size, file_ptr offset)
9103 while (p < buf + size)
9105 /* FIXME: bad alignment assumption. */
9106 Elf_External_Note *xnp = (Elf_External_Note *) p;
9107 Elf_Internal_Note in;
9109 if (offsetof (Elf_External_Note, name) > buf - p + size)
9112 in.type = H_GET_32 (abfd, xnp->type);
9114 in.namesz = H_GET_32 (abfd, xnp->namesz);
9115 in.namedata = xnp->name;
9116 if (in.namesz > buf - in.namedata + size)
9119 in.descsz = H_GET_32 (abfd, xnp->descsz);
9120 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
9121 in.descpos = offset + (in.descdata - buf);
9123 && (in.descdata >= buf + size
9124 || in.descsz > buf - in.descdata + size))
9127 switch (bfd_get_format (abfd))
9133 if (CONST_STRNEQ (in.namedata, "NetBSD-CORE"))
9135 if (! elfcore_grok_netbsd_note (abfd, &in))
9138 else if (CONST_STRNEQ (in.namedata, "OpenBSD"))
9140 if (! elfcore_grok_openbsd_note (abfd, &in))
9143 else if (CONST_STRNEQ (in.namedata, "QNX"))
9145 if (! elfcore_grok_nto_note (abfd, &in))
9148 else if (CONST_STRNEQ (in.namedata, "SPU/"))
9150 if (! elfcore_grok_spu_note (abfd, &in))
9155 if (! elfcore_grok_note (abfd, &in))
9161 if (in.namesz == sizeof "GNU" && strcmp (in.namedata, "GNU") == 0)
9163 if (! elfobj_grok_gnu_note (abfd, &in))
9169 p = in.descdata + BFD_ALIGN (in.descsz, 4);
9176 elf_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
9183 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
9186 buf = (char *) bfd_malloc (size);
9190 if (bfd_bread (buf, size, abfd) != size
9191 || !elf_parse_notes (abfd, buf, size, offset))
9201 /* Providing external access to the ELF program header table. */
9203 /* Return an upper bound on the number of bytes required to store a
9204 copy of ABFD's program header table entries. Return -1 if an error
9205 occurs; bfd_get_error will return an appropriate code. */
9208 bfd_get_elf_phdr_upper_bound (bfd *abfd)
9210 if (abfd->xvec->flavour != bfd_target_elf_flavour)
9212 bfd_set_error (bfd_error_wrong_format);
9216 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
9219 /* Copy ABFD's program header table entries to *PHDRS. The entries
9220 will be stored as an array of Elf_Internal_Phdr structures, as
9221 defined in include/elf/internal.h. To find out how large the
9222 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
9224 Return the number of program header table entries read, or -1 if an
9225 error occurs; bfd_get_error will return an appropriate code. */
9228 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
9232 if (abfd->xvec->flavour != bfd_target_elf_flavour)
9234 bfd_set_error (bfd_error_wrong_format);
9238 num_phdrs = elf_elfheader (abfd)->e_phnum;
9239 memcpy (phdrs, elf_tdata (abfd)->phdr,
9240 num_phdrs * sizeof (Elf_Internal_Phdr));
9245 enum elf_reloc_type_class
9246 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
9248 return reloc_class_normal;
9251 /* For RELA architectures, return the relocation value for a
9252 relocation against a local symbol. */
9255 _bfd_elf_rela_local_sym (bfd *abfd,
9256 Elf_Internal_Sym *sym,
9258 Elf_Internal_Rela *rel)
9260 asection *sec = *psec;
9263 relocation = (sec->output_section->vma
9264 + sec->output_offset
9266 if ((sec->flags & SEC_MERGE)
9267 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
9268 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
9271 _bfd_merged_section_offset (abfd, psec,
9272 elf_section_data (sec)->sec_info,
9273 sym->st_value + rel->r_addend);
9276 /* If we have changed the section, and our original section is
9277 marked with SEC_EXCLUDE, it means that the original
9278 SEC_MERGE section has been completely subsumed in some
9279 other SEC_MERGE section. In this case, we need to leave
9280 some info around for --emit-relocs. */
9281 if ((sec->flags & SEC_EXCLUDE) != 0)
9282 sec->kept_section = *psec;
9285 rel->r_addend -= relocation;
9286 rel->r_addend += sec->output_section->vma + sec->output_offset;
9292 _bfd_elf_rel_local_sym (bfd *abfd,
9293 Elf_Internal_Sym *sym,
9297 asection *sec = *psec;
9299 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
9300 return sym->st_value + addend;
9302 return _bfd_merged_section_offset (abfd, psec,
9303 elf_section_data (sec)->sec_info,
9304 sym->st_value + addend);
9308 _bfd_elf_section_offset (bfd *abfd,
9309 struct bfd_link_info *info,
9313 switch (sec->sec_info_type)
9315 case ELF_INFO_TYPE_STABS:
9316 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
9318 case ELF_INFO_TYPE_EH_FRAME:
9319 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
9325 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
9326 reconstruct an ELF file by reading the segments out of remote memory
9327 based on the ELF file header at EHDR_VMA and the ELF program headers it
9328 points to. If not null, *LOADBASEP is filled in with the difference
9329 between the VMAs from which the segments were read, and the VMAs the
9330 file headers (and hence BFD's idea of each section's VMA) put them at.
9332 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
9333 remote memory at target address VMA into the local buffer at MYADDR; it
9334 should return zero on success or an `errno' code on failure. TEMPL must
9335 be a BFD for an ELF target with the word size and byte order found in
9336 the remote memory. */
9339 bfd_elf_bfd_from_remote_memory
9343 int (*target_read_memory) (bfd_vma, bfd_byte *, int))
9345 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
9346 (templ, ehdr_vma, loadbasep, target_read_memory);
9350 _bfd_elf_get_synthetic_symtab (bfd *abfd,
9351 long symcount ATTRIBUTE_UNUSED,
9352 asymbol **syms ATTRIBUTE_UNUSED,
9357 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9360 const char *relplt_name;
9361 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
9365 Elf_Internal_Shdr *hdr;
9371 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
9374 if (dynsymcount <= 0)
9377 if (!bed->plt_sym_val)
9380 relplt_name = bed->relplt_name;
9381 if (relplt_name == NULL)
9382 relplt_name = bed->rela_plts_and_copies_p ? ".rela.plt" : ".rel.plt";
9383 relplt = bfd_get_section_by_name (abfd, relplt_name);
9387 hdr = &elf_section_data (relplt)->this_hdr;
9388 if (hdr->sh_link != elf_dynsymtab (abfd)
9389 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
9392 plt = bfd_get_section_by_name (abfd, ".plt");
9396 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
9397 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
9400 count = relplt->size / hdr->sh_entsize;
9401 size = count * sizeof (asymbol);
9402 p = relplt->relocation;
9403 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
9405 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
9409 size += sizeof ("+0x") - 1 + 8 + 8 * (bed->s->elfclass == ELFCLASS64);
9411 size += sizeof ("+0x") - 1 + 8;
9416 s = *ret = (asymbol *) bfd_malloc (size);
9420 names = (char *) (s + count);
9421 p = relplt->relocation;
9423 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
9428 addr = bed->plt_sym_val (i, plt, p);
9429 if (addr == (bfd_vma) -1)
9432 *s = **p->sym_ptr_ptr;
9433 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
9434 we are defining a symbol, ensure one of them is set. */
9435 if ((s->flags & BSF_LOCAL) == 0)
9436 s->flags |= BSF_GLOBAL;
9437 s->flags |= BSF_SYNTHETIC;
9439 s->value = addr - plt->vma;
9442 len = strlen ((*p->sym_ptr_ptr)->name);
9443 memcpy (names, (*p->sym_ptr_ptr)->name, len);
9449 memcpy (names, "+0x", sizeof ("+0x") - 1);
9450 names += sizeof ("+0x") - 1;
9451 bfd_sprintf_vma (abfd, buf, p->addend);
9452 for (a = buf; *a == '0'; ++a)
9455 memcpy (names, a, len);
9458 memcpy (names, "@plt", sizeof ("@plt"));
9459 names += sizeof ("@plt");
9466 /* It is only used by x86-64 so far. */
9467 asection _bfd_elf_large_com_section
9468 = BFD_FAKE_SECTION (_bfd_elf_large_com_section,
9469 SEC_IS_COMMON, NULL, "LARGE_COMMON", 0);
9472 _bfd_elf_set_osabi (bfd * abfd,
9473 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
9475 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
9477 i_ehdrp = elf_elfheader (abfd);
9479 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
9481 /* To make things simpler for the loader on Linux systems we set the
9482 osabi field to ELFOSABI_LINUX if the binary contains symbols of
9483 the STT_GNU_IFUNC type. */
9484 if (i_ehdrp->e_ident[EI_OSABI] == ELFOSABI_NONE
9485 && elf_tdata (abfd)->has_ifunc_symbols)
9486 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_LINUX;
9490 /* Return TRUE for ELF symbol types that represent functions.
9491 This is the default version of this function, which is sufficient for
9492 most targets. It returns true if TYPE is STT_FUNC or STT_GNU_IFUNC. */
9495 _bfd_elf_is_function_type (unsigned int type)
9497 return (type == STT_FUNC
9498 || type == STT_GNU_IFUNC);