1 /* Return number of sections in the ELF file.
2 Copyright (C) 2002 Red Hat, Inc.
3 Written by Ulrich Drepper <drepper@redhat.com>, 2002.
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 <assert.h>
23 #include <gelf.h>
24 #include <stddef.h>
25
26 #include "libelfP.h"
27
28
29 int
elf_getshnum(elf,dst)30 elf_getshnum (elf, dst)
31 Elf *elf;
32 size_t *dst;
33 {
34 int result = 0;
35 int idx;
36
37 if (elf == NULL)
38 return -1;
39
40 if (unlikely (elf->kind != ELF_K_ELF))
41 {
42 __libelf_seterrno (ELF_E_INVALID_HANDLE);
43 return -1;
44 }
45
46 rwlock_rdlock (elf->lock);
47
48 idx = elf->state.elf.scns_last->cnt;
49 if (idx != 0
50 || (elf->state.elf.scns_last
51 != (elf->class == ELFCLASS32
52 || (offsetof (Elf, state.elf32.scns)
53 == offsetof (Elf, state.elf64.scns))
54 ? &elf->state.elf32.scns : &elf->state.elf64.scns)))
55 /* There is at least one section. */
56 *dst = 1 + elf->state.elf.scns_last->data[idx - 1].index;
57 else
58 *dst = 0;
59
60 rwlock_unlock (elf->lock);
61
62 return result;
63 }
64 INTDEF(elf_getshnum)
65