Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 1 | /* Update section header. |
| 2 | Copyright (C) 2000, 2001, 2002, 2010 Red Hat, Inc. |
Elliott Hughes | 0333382 | 2015-02-18 22:19:45 -0800 | [diff] [blame] | 3 | This file is part of elfutils. |
Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 4 | Written by Ulrich Drepper <drepper@redhat.com>, 2000. |
| 5 | |
Elliott Hughes | 0333382 | 2015-02-18 22:19:45 -0800 | [diff] [blame] | 6 | This file is free software; you can redistribute it and/or modify |
| 7 | it under the terms of either |
Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 8 | |
Elliott Hughes | 0333382 | 2015-02-18 22:19:45 -0800 | [diff] [blame] | 9 | * the GNU Lesser General Public License as published by the Free |
| 10 | Software Foundation; either version 3 of the License, or (at |
| 11 | your option) any later version |
| 12 | |
| 13 | or |
| 14 | |
| 15 | * the GNU General Public License as published by the Free |
| 16 | Software Foundation; either version 2 of the License, or (at |
| 17 | your option) any later version |
| 18 | |
| 19 | or both in parallel, as here. |
| 20 | |
| 21 | elfutils is distributed in the hope that it will be useful, but |
Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 22 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 23 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 24 | General Public License for more details. |
| 25 | |
Elliott Hughes | 0333382 | 2015-02-18 22:19:45 -0800 | [diff] [blame] | 26 | You should have received copies of the GNU General Public License and |
| 27 | the GNU Lesser General Public License along with this program. If |
| 28 | not, see <http://www.gnu.org/licenses/>. */ |
Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 29 | |
| 30 | #ifdef HAVE_CONFIG_H |
| 31 | # include <config.h> |
| 32 | #endif |
| 33 | |
| 34 | #include <gelf.h> |
| 35 | #include <string.h> |
| 36 | |
| 37 | #include "libelfP.h" |
| 38 | |
| 39 | |
| 40 | int |
| 41 | gelf_update_shdr (Elf_Scn *scn, GElf_Shdr *src) |
| 42 | { |
| 43 | int result = 0; |
| 44 | Elf *elf; |
| 45 | |
| 46 | if (scn == NULL || src == NULL) |
| 47 | return 0; |
| 48 | |
| 49 | elf = scn->elf; |
| 50 | rwlock_wrlock (elf->lock); |
| 51 | |
| 52 | if (elf->class == ELFCLASS32) |
| 53 | { |
| 54 | Elf32_Shdr *shdr |
| 55 | = scn->shdr.e32 ?: __elf32_getshdr_wrlock (scn); |
| 56 | |
| 57 | if (shdr == NULL) |
| 58 | { |
| 59 | __libelf_seterrno (ELF_E_INVALID_OPERAND); |
| 60 | goto out; |
| 61 | } |
| 62 | |
| 63 | if (unlikely (src->sh_flags > 0xffffffffull) |
| 64 | || unlikely (src->sh_addr > 0xffffffffull) |
| 65 | || unlikely (src->sh_offset > 0xffffffffull) |
| 66 | || unlikely (src->sh_size > 0xffffffffull) |
| 67 | || unlikely (src->sh_addralign > 0xffffffffull) |
| 68 | || unlikely (src->sh_entsize > 0xffffffffull)) |
| 69 | { |
| 70 | __libelf_seterrno (ELF_E_INVALID_DATA); |
| 71 | goto out; |
| 72 | } |
| 73 | |
| 74 | #define COPY(name) \ |
| 75 | shdr->name = src->name |
| 76 | COPY (sh_name); |
| 77 | COPY (sh_type); |
| 78 | COPY (sh_flags); |
| 79 | COPY (sh_addr); |
| 80 | COPY (sh_offset); |
| 81 | COPY (sh_size); |
| 82 | COPY (sh_link); |
| 83 | COPY (sh_info); |
| 84 | COPY (sh_addralign); |
| 85 | COPY (sh_entsize); |
| 86 | } |
| 87 | else |
| 88 | { |
| 89 | Elf64_Shdr *shdr |
| 90 | = scn->shdr.e64 ?: __elf64_getshdr_wrlock (scn); |
| 91 | |
| 92 | if (shdr == NULL) |
| 93 | { |
| 94 | __libelf_seterrno (ELF_E_INVALID_OPERAND); |
| 95 | goto out; |
| 96 | } |
| 97 | |
| 98 | /* We only have to copy the data. */ |
| 99 | (void) memcpy (shdr, src, sizeof (GElf_Shdr)); |
| 100 | } |
| 101 | |
| 102 | /* Mark the section header as modified. */ |
| 103 | scn->shdr_flags |= ELF_F_DIRTY; |
| 104 | |
| 105 | result = 1; |
| 106 | |
| 107 | out: |
| 108 | rwlock_unlock (elf->lock); |
| 109 | |
| 110 | return result; |
| 111 | } |