xref: /minix3/external/bsd/elftoolchain/dist/libelf/elf_getbase.c (revision 0a6a1f1d05b60e214de2f05a7310ddd1f0e590e7)
1 /*	$NetBSD: elf_getbase.c,v 1.2 2014/03/09 16:58:04 christos Exp $	*/
2 
3 /*-
4  * Copyright (c) 2006,2008 Joseph Koshy
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 
29 #include <sys/cdefs.h>
30 
31 #include <libelf.h>
32 
33 #include "_libelf.h"
34 
35 __RCSID("$NetBSD: elf_getbase.c,v 1.2 2014/03/09 16:58:04 christos Exp $");
36 ELFTC_VCSID("Id: elf_getbase.c 2225 2011-11-26 18:55:54Z jkoshy ");
37 
38 off_t
elf_getbase(Elf * e)39 elf_getbase(Elf *e)
40 {
41 	if (e == NULL) {
42 		LIBELF_SET_ERROR(ARGUMENT, 0);
43 		return ((off_t) -1);
44 	}
45 
46 	if (e->e_parent == NULL)
47 		return ((off_t) 0);
48 
49 	return ((off_t) ((uintptr_t) e->e_rawfile -
50 	    (uintptr_t) e->e_parent->e_rawfile));
51 }
52