1 /* 2 * Copyright (c) 1992 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This software was developed by the Computer Systems Engineering group 6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7 * contributed to Berkeley. 8 * 9 * All advertising materials mentioning features or use of this software 10 * must display the following acknowledgement: 11 * This product includes software developed by the University of 12 * California, Lawrence Berkeley Laboratories. 13 * 14 * %sccs.include.redist.c% 15 * 16 * @(#)varargs.h 7.3 (Berkeley) 10/15/92 17 * 18 * from: $Header: varargs.h,v 1.5 92/10/16 04:16:09 torek Exp $ 19 */ 20 21 #ifndef _MACHINE_VARARGS_H_ 22 #define _MACHINE_VARARGS_H_ 23 24 /* See <machine/stdarg.h> for comments. */ 25 #if __GNUC__ == 1 26 #define __extension__ 27 #endif 28 typedef char *va_list; 29 #define va_dcl int va_alist; 30 #define va_start(ap) (__builtin_saveregs(), (ap) = (char *)&va_alist) 31 #define va_arg(ap, ty) \ 32 (sizeof(ty) == 8 ? __extension__ ({ \ 33 union { ty __d; int __i[2]; } __u; \ 34 __u.__i[0] = ((int *)(ap))[0]; \ 35 __u.__i[1] = ((int *)(ap))[1]; \ 36 (ap) += 8; \ 37 __u.__d; }) : \ 38 ((ty *)(ap += sizeof(ty)))[-1]) 39 #define va_end(ap) /* empty */ 40 41 #endif /* !_MACHINE_VARARGS_H_ */ 42