Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame^] | 1 | /* Update section header. |
| 2 | Copyright (C) 2000, 2001, 2002 Red Hat, Inc. |
| 3 | Written by Ulrich Drepper <drepper@redhat.com>, 2000. |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation, version 2. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License |
| 15 | along with this program; if not, write to the Free Software Foundation, |
| 16 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 17 | |
| 18 | #ifdef HAVE_CONFIG_H |
| 19 | # include <config.h> |
| 20 | #endif |
| 21 | |
| 22 | #include <gelf.h> |
| 23 | #include <string.h> |
| 24 | |
| 25 | #include "libelfP.h" |
| 26 | |
| 27 | |
| 28 | int |
| 29 | gelf_update_shdr (Elf_Scn *scn, GElf_Shdr *src) |
| 30 | { |
| 31 | int result = 0; |
| 32 | Elf *elf; |
| 33 | |
| 34 | if (scn == NULL || src == NULL) |
| 35 | return 0; |
| 36 | |
| 37 | elf = scn->elf; |
| 38 | rwlock_wrlock (elf->lock); |
| 39 | |
| 40 | if (elf->class == ELFCLASS32) |
| 41 | { |
| 42 | Elf32_Shdr *shdr = scn->shdr.e32 ?: INTUSE(elf32_getshdr) (scn); |
| 43 | |
| 44 | if (shdr == NULL) |
| 45 | { |
| 46 | __libelf_seterrno (ELF_E_INVALID_OPERAND); |
| 47 | goto out; |
| 48 | } |
| 49 | |
| 50 | if (unlikely (src->sh_flags > 0xffffffffull) |
| 51 | || unlikely (src->sh_addr > 0xffffffffull) |
| 52 | || unlikely (src->sh_offset > 0xffffffffull) |
| 53 | || unlikely (src->sh_size > 0xffffffffull) |
| 54 | || unlikely (src->sh_addralign > 0xffffffffull) |
| 55 | || unlikely (src->sh_entsize > 0xffffffffull)) |
| 56 | { |
| 57 | __libelf_seterrno (ELF_E_INVALID_DATA); |
| 58 | goto out; |
| 59 | } |
| 60 | |
| 61 | #define COPY(name) \ |
| 62 | shdr->name = src->name |
| 63 | COPY (sh_name); |
| 64 | COPY (sh_type); |
| 65 | COPY (sh_flags); |
| 66 | COPY (sh_addr); |
| 67 | COPY (sh_offset); |
| 68 | COPY (sh_size); |
| 69 | COPY (sh_link); |
| 70 | COPY (sh_info); |
| 71 | COPY (sh_addralign); |
| 72 | COPY (sh_entsize); |
| 73 | } |
| 74 | else |
| 75 | { |
| 76 | Elf64_Shdr *shdr = scn->shdr.e64 ?: INTUSE(elf64_getshdr) (scn); |
| 77 | |
| 78 | if (shdr == NULL) |
| 79 | { |
| 80 | __libelf_seterrno (ELF_E_INVALID_OPERAND); |
| 81 | goto out; |
| 82 | } |
| 83 | |
| 84 | /* We only have to copy the data. */ |
| 85 | (void) memcpy (shdr, src, sizeof (GElf_Shdr)); |
| 86 | } |
| 87 | |
| 88 | result = 1; |
| 89 | |
| 90 | out: |
| 91 | rwlock_unlock (elf->lock); |
| 92 | |
| 93 | return result; |
| 94 | } |