elf_shnum.c revision 260684 
1/*-
2 * Copyright (c) 2006,2008 Joseph Koshy
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28
29#include <ar.h>
30#include <libelf.h>
31
32#include "_libelf.h"
33
34ELFTC_VCSID("$Id: elf_shnum.c 2225 2011-11-26 18:55:54Z jkoshy $");
35
36static int
37_libelf_getshdrnum(Elf *e, size_t *shnum)
38{
39	void *eh;
40	int ec;
41
42	if (e == NULL || e->e_kind != ELF_K_ELF ||
43	    ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) {
44		LIBELF_SET_ERROR(ARGUMENT, 0);
45		return (-1);
46	}
47
48	if ((eh = _libelf_ehdr(e, ec, 0)) == NULL)
49		return (-1);
50
51	*shnum = e->e_u.e_elf.e_nscn;
52
53	return (0);
54}
55
56int
57elf_getshdrnum(Elf *e, size_t *shnum)
58{
59	return (_libelf_getshdrnum(e, shnum));
60}
61
62/* Deprecated API. */
63int
64elf_getshnum(Elf *e, size_t *shnum)
65{
66	return (_libelf_getshdrnum(e, shnum) >= 0);
67}
68