xref: /titanic_52/usr/src/cmd/sgs/libelf/common/hash.c (revision a4aef2bab3a15f31b03de3834937be168fb83b36)
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 /*
33  * The elf_hash() routine as defined by the gABI
34  */
35 unsigned long
36 elf_hash(const char *ename)
37 {
38 	unsigned int	hval = 0;
39 
40 	while (*ename) {
41 		unsigned int	g;
42 		hval = (hval << 4) + *ename++;
43 		if ((g = (hval & 0xf0000000)) != 0)
44 			hval ^= g >> 24;
45 		hval &= ~g;
46 	}
47 	return ((unsigned long)hval);
48 }
49