/src/libbpf/elfutils/libelf/elf_getshdrnum.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* Return number of sections in the ELF file. |
2 | | Copyright (C) 2002, 2009, 2015 Red Hat, Inc. |
3 | | This file is part of elfutils. |
4 | | Written by Ulrich Drepper <drepper@redhat.com>, 2002. |
5 | | |
6 | | This file is free software; you can redistribute it and/or modify |
7 | | it under the terms of either |
8 | | |
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 |
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 | | |
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/>. */ |
29 | | |
30 | | #ifdef HAVE_CONFIG_H |
31 | | # include <config.h> |
32 | | #endif |
33 | | |
34 | | #include <assert.h> |
35 | | #include <gelf.h> |
36 | | #include <stddef.h> |
37 | | |
38 | | #include "libelfP.h" |
39 | | |
40 | | |
41 | | int |
42 | | internal_function |
43 | | __elf_getshdrnum_rdlock (Elf *elf, size_t *dst) |
44 | 860 | { |
45 | 860 | int result = 0; |
46 | 860 | int idx; |
47 | | |
48 | 860 | if (elf == NULL) |
49 | 0 | return -1; |
50 | | |
51 | 860 | if (unlikely (elf->kind != ELF_K_ELF)) |
52 | 0 | { |
53 | 0 | __libelf_seterrno (ELF_E_INVALID_HANDLE); |
54 | 0 | return -1; |
55 | 0 | } |
56 | | |
57 | 860 | idx = elf->state.elf.scns_last->cnt; |
58 | 860 | if (idx != 0 |
59 | 860 | || (elf->state.elf.scns_last |
60 | 0 | != (elf->class == ELFCLASS32 |
61 | 0 | || (offsetof (Elf, state.elf32.scns) |
62 | 0 | == offsetof (Elf, state.elf64.scns)) |
63 | 0 | ? &elf->state.elf32.scns : &elf->state.elf64.scns))) |
64 | | /* There is at least one section. */ |
65 | 860 | *dst = 1 + elf->state.elf.scns_last->data[idx - 1].index; |
66 | 0 | else |
67 | 0 | *dst = 0; |
68 | | |
69 | 860 | return result; |
70 | 860 | } |
71 | | |
72 | | int |
73 | | elf_getshdrnum (Elf *elf, size_t *dst) |
74 | 796 | { |
75 | 796 | int result; |
76 | | |
77 | 796 | if (elf == NULL) |
78 | 0 | return -1; |
79 | | |
80 | 796 | rwlock_rdlock (elf->lock); |
81 | 796 | result = __elf_getshdrnum_rdlock (elf, dst); |
82 | 796 | rwlock_unlock (elf->lock); |
83 | | |
84 | 796 | return result; |
85 | 796 | } |
86 | | /* Alias for the deprecated name. */ |
87 | | strong_alias (elf_getshdrnum, elf_getshnum) |