varargs.h revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 2002 David E. O'Brien.  All rights reserved.
5 * Copyright (c) 1990, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 * (c) UNIX System Laboratories, Inc.
8 * All or some portions of this file are derived from material licensed
9 * to the University of California by American Telephone and Telegraph
10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
11 * the permission of UNIX System Laboratories, Inc.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 *    notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 *    notice, this list of conditions and the following disclaimer in the
20 *    documentation and/or other materials provided with the distribution.
21 * 3. All advertising materials mentioning features or use of this software
22 *    must display the following acknowledgement:
23 *	This product includes software developed by the University of
24 *	California, Berkeley and its contributors.
25 * 4. Neither the name of the University nor the names of its contributors
26 *    may be used to endorse or promote products derived from this software
27 *    without specific prior written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 * SUCH DAMAGE.
40 *
41 *	@(#)varargs.h	8.2 (Berkeley) 3/22/94
42 * $FreeBSD: stable/11/sys/amd64/include/varargs.h 330897 2018-03-14 03:19:51Z eadler $
43 */
44
45#ifndef _MACHINE_VARARGS_H_
46#define	_MACHINE_VARARGS_H_
47
48#ifndef _SYS_CDEFS_H_
49#error this file needs sys/cdefs.h as a prerequisite
50#endif
51
52#ifdef __GNUCLIKE_BUILTIN_VARARGS
53
54#include <sys/_types.h>
55
56#ifndef _VA_LIST_DECLARED
57#define	_VA_LIST_DECLARED
58typedef	__va_list	va_list;
59#endif
60
61typedef int __builtin_va_alist_t __attribute__((__mode__(__word__)));
62
63#define	va_alist		__builtin_va_alist
64#define	va_dcl			__builtin_va_alist_t __builtin_va_alist; ...
65#define	va_start(ap)		__builtin_varargs_start(ap)
66#define	va_arg(ap, type)	__builtin_va_arg((ap), type)
67#define	va_end(ap)		__builtin_va_end(ap)
68
69#else	/* !__GNUCLIKE_BUILTIN_VARARGS */
70
71typedef char *va_list;
72
73#define	__va_size(type) \
74	(((sizeof(type) + sizeof(int) - 1) / sizeof(int)) * sizeof(int))
75
76#if defined(__GNUCLIKE_BUILTIN_VAALIST)
77#define	va_alist	__builtin_va_alist
78#endif
79#define	va_dcl	int va_alist; ...
80
81#define	va_start(ap) \
82	((ap) = (va_list)&va_alist)
83
84#define	va_arg(ap, type) \
85	(*(type *)((ap) += __va_size(type), (ap) - __va_size(type)))
86
87#define	va_end(ap)
88
89#endif /* __GNUCLIKE_BUILTIN_VARARGS */
90
91#endif /* !_MACHINE_VARARGS_H_ */
92