xref: /titanic_44/usr/src/lib/libsaveargs/common/saveargs.h (revision a60349c89adffc0902b2353230891d8e7f2b24d9)
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  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #ifndef	_SAVEARGS_H
27 #define	_SAVEARGS_H
28 
29 #ifdef __cplusplus
30 extern "C" {
31 #endif
32 
33 #include <sys/types.h>
34 
35 /*
36  * The longest instruction sequence in bytes before all 6 arguments are
37  * saved on the stack.  This value depends on compiler implementation,
38  * therefore it should be examined periodically to guarantee accuracy.
39  */
40 #define	SAVEARGS_INSN_SEQ_LEN	256
41 
42 #define	SAVEARGS_NO_ARGS	0	/* no saved arguments */
43 #define	SAVEARGS_TRAD_ARGS	1	/* traditionally located arguments */
44 #define	SAVEARGS_STRUCT_ARGS	2	/* struct return addr pushed as arg0 */
45 
46 int saveargs_has_args(uint8_t *, size_t, uint_t, int);
47 
48 #ifdef __cplusplus
49 }
50 #endif
51 
52 #endif	/* _SAVEARGS_H */
53