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b08d5a8f | 1 | /* Get library from table at the given index. |
1ccdfb68 | 2 | Copyright (C) 2004, 2005, 2009, 2014, 2015 Red Hat, Inc. |
de2ed97f | 3 | This file is part of elfutils. |
b08d5a8f UD |
4 | Written by Ulrich Drepper <drepper@redhat.com>, 2004. |
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 <assert.h> | |
35 | #include <gelf.h> | |
36 | #include <string.h> | |
37 | ||
38 | #include "libelfP.h" | |
39 | ||
40 | ||
41 | GElf_Lib * | |
1ccdfb68 | 42 | gelf_getlib (Elf_Data *data, int ndx, GElf_Lib *dst) |
b08d5a8f UD |
43 | { |
44 | if (data == NULL) | |
45 | return NULL; | |
46 | ||
47 | if (unlikely (data->d_type != ELF_T_LIB)) | |
48 | { | |
49 | __libelf_seterrno (ELF_E_INVALID_HANDLE); | |
50 | return NULL; | |
51 | } | |
52 | ||
53 | Elf_Data_Scn *data_scn = (Elf_Data_Scn *) data; | |
54 | ||
b4d6f0f8 | 55 | rwlock_rdlock (data_scn->s->elf->lock); |
b08d5a8f UD |
56 | |
57 | /* The on disk format of Elf32_Lib and Elf64_Lib is identical. So | |
58 | we can simplify things significantly. */ | |
59 | assert (sizeof (GElf_Lib) == sizeof (Elf32_Lib)); | |
60 | assert (sizeof (GElf_Lib) == sizeof (Elf64_Lib)); | |
61 | ||
62 | /* The data is already in the correct form. Just make sure the | |
63 | index is OK. */ | |
64 | GElf_Lib *result = NULL; | |
a9039623 | 65 | if (INVALID_NDX (ndx, GElf_Lib, data)) |
b08d5a8f UD |
66 | __libelf_seterrno (ELF_E_INVALID_INDEX); |
67 | else | |
68 | { | |
69 | *dst = ((GElf_Lib *) data->d_buf)[ndx]; | |
70 | ||
71 | result = dst; | |
72 | } | |
73 | ||
b4d6f0f8 | 74 | rwlock_unlock (data_scn->s->elf->lock); |
b08d5a8f UD |
75 | |
76 | return result; | |
77 | } |