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b08d5a8f | 1 | /* Update section header. |
d7635784 | 2 | Copyright (C) 2000, 2001, 2002, 2010 Red Hat, Inc. |
de2ed97f | 3 | This file is part of elfutils. |
b08d5a8f UD |
4 | Written by Ulrich Drepper <drepper@redhat.com>, 2000. |
5 | ||
de2ed97f MW |
6 | This file is free software; you can redistribute it and/or modify |
7 | it under the terms of either | |
b08d5a8f | 8 | |
de2ed97f MW |
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 | |
361df7da UD |
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. | |
b08d5a8f | 25 | |
de2ed97f MW |
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/>. */ | |
b08d5a8f UD |
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; | |
b4d6f0f8 | 50 | rwlock_wrlock (elf->lock); |
b08d5a8f UD |
51 | |
52 | if (elf->class == ELFCLASS32) | |
53 | { | |
d56e232f | 54 | Elf32_Shdr *shdr |
b4d6f0f8 | 55 | = scn->shdr.e32 ?: __elf32_getshdr_wrlock (scn); |
b08d5a8f UD |
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 | { | |
d56e232f | 89 | Elf64_Shdr *shdr |
b4d6f0f8 | 90 | = scn->shdr.e64 ?: __elf64_getshdr_wrlock (scn); |
b08d5a8f UD |
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 | ||
d7635784 UD |
102 | /* Mark the section header as modified. */ |
103 | scn->shdr_flags |= ELF_F_DIRTY; | |
104 | ||
b08d5a8f UD |
105 | result = 1; |
106 | ||
107 | out: | |
b4d6f0f8 | 108 | rwlock_unlock (elf->lock); |
b08d5a8f UD |
109 | |
110 | return result; | |
111 | } |