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 <ar.h>
28 #include <libelf.h>
29 
30 #include "_libelf.h"
31 
32 ELFTC_VCSID("$Id: elf_shstrndx.c 3174 2015-03-27 17:13:41Z emaste $");
33 
34 static int
35 _libelf_getshdrstrndx(Elf *e, size_t *strndx)
36 {
37 	void *eh;
38 	int ec;
39 
40 	if (e == NULL || e->e_kind != ELF_K_ELF ||
41 	    ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) {
42 		LIBELF_SET_ERROR(ARGUMENT, 0);
43 		return (-1);
44 	}
45 
46 	if ((eh = _libelf_ehdr(e, ec, 0)) == NULL)
47 		return (-1);
48 
49 	*strndx = e->e_u.e_elf.e_strndx;
50 
51 	return (0);
52 }
53 
54 int
55 elf_getshdrstrndx(Elf *e, size_t *strndx)
56 {
57 	return (_libelf_getshdrstrndx(e, strndx));
58 }
59 
60 int
61 elf_getshstrndx(Elf *e, size_t *strndx)	/* Deprecated API. */
62 {
63 	return (_libelf_getshdrstrndx(e, strndx) >= 0);
64 }
65 
66 int
67 elf_setshstrndx(Elf *e, size_t strndx)
68 {
69 	void *eh;
70 	int ec;
71 
72 	if (e == NULL || e->e_kind != ELF_K_ELF ||
73 	    ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64) ||
74 	    ((eh = _libelf_ehdr(e, ec, 0)) == NULL)) {
75 		LIBELF_SET_ERROR(ARGUMENT, 0);
76 		return (0);
77 	}
78 
79 	return (_libelf_setshstrndx(e, eh, ec, strndx));
80 }
81