osfmk/sys/varargs.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * @OSF_COPYRIGHT@
  24  */
  25 /*
  26  * HISTORY
  27  *
  28  * Revision 1.1.1.1  1998/09/22 21:05:49  wsanchez
  29  * Import of Mac OS X kernel (~semeria)
  30  *
  31  * Revision 1.1.1.1  1998/03/07 02:25:59  wsanchez
  32  * Import of OSF Mach kernel (~mburg)
  33  *
  34  * Revision 1.2.28.1  1996/11/29  16:59:53  stephen
  35  *      nmklinux_1.0b3_shared into pmk1.1
  36  *      Added powerpc special case
  37  *      [1996/11/29  16:34:18  stephen]
  38  *
  39  * Revision 1.2.15.2  1996/01/09  19:23:16  devrcs
  40  *      Added alpha varargs.h
  41  *      [1995/12/01  20:39:10  jfraser]
  42  *
  43  *      Merged '64-bit safe' changes from DEC alpha port.
  44  *      [1995/11/21  18:10:39  jfraser]
  45  *
  46  * Revision 1.2.15.1  1994/09/23  03:13:46  ezf
  47  *      change marker to not FREE
  48  *      [1994/09/22  21:59:07  ezf]
  49  *
  50  * Revision 1.2.4.3  1993/08/03  18:30:40  gm
  51  *      CR9596: Change KERNEL to MACH_KERNEL.
  52  *      [1993/08/02  19:03:10  gm]
  53  *
  54  * Revision 1.2.4.2  1993/06/09  02:55:42  gm
  55  *      Added to OSF/1 R1.3 from NMK15.0.
  56  *      [1993/06/02  21:31:11  jeffc]
  57  *
  58  * Revision 1.2  1993/04/19  17:17:26  devrcs
  59  *      correct endif tags for ansi
  60  *      [1993/02/25  17:56:02  david]
  61  *
  62  * Revision 1.1  1992/09/30  02:37:05  robert
  63  *      Initial revision
  64  *
  65  * $EndLog$
  66  */
  67 /* CMU_HIST */
  68 /*
  69  * Revision 2.10  91/12/10  16:32:53  jsb
  70  *      Fixes from Intel
  71  *      [91/12/10  15:52:01  jsb]
  72  *
  73  * Revision 2.9  91/09/12  16:54:22  debo
  74  *      Added mac2.
  75  *      [91/09/11  17:22:52  debo]
  76  *
  77  * Revision 2.8  91/07/09  23:23:50  danner
  78  *      Added luna88k support.
  79  *      [91/06/24            danner]
  80  *
  81  * Revision 2.7  91/06/18  20:53:02  jsb
  82  *      Moved i860 varargs code here from i860/i860_varargs.h, thanks to
  83  *      new copyright from Intel.
  84  *      [91/06/18  19:15:02  jsb]
  85  *
  86  * Revision 2.6  91/05/14  17:40:46  mrt
  87  *      Correcting copyright
  88  *
  89  * Revision 2.5  91/02/05  17:57:12  mrt
  90  *      Changed to new Mach copyright
  91  *      [91/02/01  17:49:51  mrt]
  92  *
  93  * Revision 2.4  90/11/25  17:48:50  jsb
  94  *      Added i860 support.
  95  *      [90/11/25  16:54:09  jsb]
  96  *
  97  * Revision 2.3  90/05/03  15:51:29  dbg
  98  *      Added i386.
  99  *      [90/02/08            dbg]
 100  *
 101  * Revision 2.2  89/11/29  14:16:44  af
 102  *      RCS-ed, added mips case.  Mips also needs it in Mach standalone
 103  *      programs.
 104  *      [89/10/28  10:39:14  af]
 105  *
 106  */
 107 /* CMU_ENDHIST */
 108 /*
 109  * Mach Operating System
 110  * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
 111  * All Rights Reserved.
 112  *
 113  * Permission to use, copy, modify and distribute this software and its
 114  * documentation is hereby granted, provided that both the copyright
 115  * notice and this permission notice appear in all copies of the
 116  * software, derivative works or modified versions, and any portions
 117  * thereof, and that both notices appear in supporting documentation.
 118  *
 119  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 120  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 121  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 122  *
 123  * Carnegie Mellon requests users of this software to return to
 124  *
 125  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 126  *  School of Computer Science
 127  *  Carnegie Mellon University
 128  *  Pittsburgh PA 15213-3890
 129  *
 130  * any improvements or extensions that they make and grant Carnegie Mellon rights
 131  * to redistribute these changes.
 132  */
 133 /*
 134  */
 135
 136 #ifndef _SYS_VARARGS_H_
 137 #define _SYS_VARARGS_H_
 138
 139 #if     defined(vax) || defined(sun3) || defined(mips) || defined(i386) || defined(mac2)
 140 #define va_dcl  int     va_alist;
 141 typedef char *  va_list;
 142
 143 #define va_start(pvar)  (pvar) = (va_list)&va_alist
 144 #define va_end(pvar)
 145 #ifdef  mips
 146 # define va_arg(pvar, type) ((type *)(pvar = \
 147                 (va_list) (sizeof(type) > 4 ? ((int)pvar + 2*8 - 1) & -8 \
 148                                    : ((int)pvar + 2*4 - 1) & -4)))[-1]
 149 #else   /* mips */
 150 #define va_arg(pvar,type)       (               \
 151                 (pvar) += ((sizeof(type)+3) & ~0x3),    \
 152                 *((type *)((pvar) - ((sizeof(type)+3) & ~0x3))) )
 153 #endif  /* mips */
 154 #endif  /* vax */
 155
 156 /*
 157  * Try to make varargs work for the Multimax so that _doprnt can be
 158  * declared as
 159  *      _doprnt(file, fmt, list)
 160  *      FILE    *file;
 161  *      char    *fmt;
 162  *      va_list *list;
 163  * and use
 164  *
 165  *      n = va_arg(*list, type)
 166  *
 167  * without needing to drag in extra declarations
 168  *
 169  * and printf becomes
 170  *
 171  * printf(fmt, va_alist)
 172  *      char    *fmt;
 173  *      va_dcl
 174  * {
 175  *      va_list listp;
 176  *      va_start(listp);
 177  *      _doprnt((FILE *)0, fmt, &listp);
 178  *      va_end(listp);
 179  * }
 180  */
 181
 182 #if     defined(multimax) && defined(MACH_KERNEL)
 183
 184 /*
 185  * the vararglist pointer is an elaborate structure (ecch)
 186  */
 187 typedef struct va_list {
 188         char    *va_item;       /* current item */
 189         int     *va_ptr1,       /* arglist pointers for 1, 2, n */
 190                 *va_ptr2,
 191                 *va_ptrn;
 192         int     va_ct;          /* current argument number */
 193 } va_list;
 194
 195 #define va_alist        va_arg1, va_arg2, va_argn
 196 #define va_dcl          int     va_arg1, va_arg2, va_argn;
 197
 198 #define va_start(pvar)  (               \
 199         (pvar).va_ptr1 = &va_arg1,      \
 200         (pvar).va_ptr2 = &va_arg2,      \
 201         (pvar).va_ptrn = &va_argn,      \
 202         (pvar).va_ct = 0 )
 203
 204 #define va_end(pvar)
 205
 206 #define va_arg(pvar, type)      (       \
 207         (pvar).va_ct++,                 \
 208         (pvar).va_item = (char *)       \
 209           ( ((pvar).va_ct == 1)         \
 210             ? (pvar).va_ptr1            \
 211             : ((pvar).va_ct == 2)       \
 212               ? (pvar).va_ptr2          \
 213               : (pvar).va_ptrn++ ) ,    \
 214         *((type *)((pvar).va_item)) )
 215
 216 /* what a mess! */
 217 #endif  /* defined(multimax) && defined(MACH_KERNEL) */
 218
 219 #if i860
 220 #include <i860/varargs.h>       /* PGI vs. Greenhills */
 221 #endif
 222
 223 #ifdef luna88k
 224 #include <luna88k/varargs.h> /* How nice */
 225 #endif
 226
 227 #if defined (__PPC__) && defined (_CALL_SYSV)
 228 #include <ppc/va-ppc.h> /* care of gcc compiler - TEMPORARY 2.7.1 TODO NMGS*/
 229 #endif
 230
 231 #if defined(__alpha)
 232 #  include <varargs.h>
 233 #endif /* defined(__alpha) */
 234
 235 #endif /* _SYS_VARARGS_H_ */