sys/cpu/x86_64/include/varargs.h

   1 /*-
   2  * Copyright (c) 2002 David E. O'Brien.  All rights reserved.
   3  * Copyright (c) 1990, 1993
   4  *      The Regents of the University of California.  All rights reserved.
   5  * (c) UNIX System Laboratories, Inc.
   6  * All or some portions of this file are derived from material licensed
   7  * to the University of California by American Telephone and Telegraph
   8  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
   9  * the permission of UNIX System Laboratories, Inc.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *      This product includes software developed by the University of
  22  *      California, Berkeley and its contributors.
  23  * 4. Neither the name of the University nor the names of its contributors
  24  *    may be used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  37  * SUCH DAMAGE.
  38  *
  39  *      @(#)varargs.h   8.2 (Berkeley) 3/22/94
  40  * $FreeBSD: src/sys/amd64/include/varargs.h,v 1.14 2005/03/11 22:16:09 peter Exp $
  41  */
  42
  43 #ifndef _CPU_VARARGS_H_
  44 #define _CPU_VARARGS_H_
  45
  46 #ifdef __GNUC__
  47
  48 typedef __builtin_va_list       va_list;        /* internally known to gcc */
  49
  50 typedef int __builtin_va_alist_t __attribute__((__mode__(__word__)));
  51
  52 #define va_alist                __builtin_va_alist
  53 #define va_dcl                  __builtin_va_alist_t __builtin_va_alist; ...
  54 #define va_start(ap)            __builtin_varargs_start(ap)
  55 #define va_arg(ap, type)        __builtin_va_arg((ap), type)
  56 #define va_end(ap)              __builtin_va_end(ap)
  57
  58 #else   /* !__GNUC__ */
  59
  60 typedef char *va_list;
  61
  62 #define __va_size(type) \
  63         (((sizeof(type) + sizeof(int) - 1) / sizeof(int)) * sizeof(int))
  64
  65 #define va_dcl  int va_alist; ...
  66
  67 #define va_start(ap) \
  68         ((ap) = (va_list)&va_alist)
  69
  70 #define va_arg(ap, type) \
  71         (*(type *)((ap) += __va_size(type), (ap) - __va_size(type)))
  72
  73 #define va_end(ap)
  74
  75 #endif /* __GNUC__ */
  76
  77 #endif /* !_CPU_VARARGS_H_ */