xref: /illumos-gate/usr/src/cmd/sgs/libelf/common/rand.c (revision 7257d1b4)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1988 AT&T	*/
28 /*	  All Rights Reserved  	*/
29 
30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
31 
32 #include "libelf.h"
33 #include "decl.h"
34 #include "msg.h"
35 
36 size_t
37 elf_rand(Elf * elf, size_t off)
38 {
39 	if (elf == 0)
40 		return (0);
41 	ELFWLOCK(elf)
42 	if (elf->ed_kind != ELF_K_AR) {
43 		_elf_seterr(EREQ_AR, 0);
44 		ELFUNLOCK(elf)
45 		return (0);
46 	}
47 	if ((off == 0) || (elf->ed_fsz < off)) {
48 		_elf_seterr(EREQ_RAND, 0);
49 		ELFUNLOCK(elf)
50 		return (0);
51 	}
52 	elf->ed_nextoff = off;
53 	ELFUNLOCK(elf)
54 	return (off);
55 }
56