xref: /illumos-gate/usr/src/cmd/sgs/libelf/common/hash.c (revision b70bf3ee79d81df3ccc36e553e0ff11049a2b51a)
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 /*
31  * The elf_hash() routine as defined by the gABI
32  */
33 unsigned long
34 elf_hash(const char *ename)
35 {
36 	unsigned int	hval = 0;
37 
38 	while (*ename) {
39 		unsigned int	g;
40 		hval = (hval << 4) + *ename++;
41 		if ((g = (hval & 0xf0000000)) != 0)
42 			hval ^= g >> 24;
43 		hval &= ~g;
44 	}
45 	return ((unsigned long)hval);
46 }
47