osfmk/libsa/ppc/va_list.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 #if !defined(APPLE) && !defined(NeXT)
  29 /*
  30  * @OSF_COPYRIGHT@
  31  */
  32 /*
  33  * HISTORY
  34  *
  35  * Revision 1.1.1.1  1998/09/22 21:05:51  wsanchez
  36  * Import of Mac OS X kernel (~semeria)
  37  *
  38  * Revision 1.1.1.1  1998/03/07 02:25:36  wsanchez
  39  * Import of OSF Mach kernel (~mburg)
  40  *
  41  * Revision 1.1.2.1  1996/12/09  16:59:07  stephen
  42  *      nmklinux_1.0b3_shared into pmk1.1
  43  *      [1996/12/09  11:18:59  stephen]
  44  *
  45  * Revision 1.1.4.1  1996/04/11  14:37:05  emcmanus
  46  *      Copied from mainline.ppc.
  47  *      [1996/04/11  14:36:22  emcmanus]
  48  *
  49  * Revision 1.1.2.1  1995/12/28  16:37:24  barbou
  50  *      Self-Contained Mach Distribution:
  51  *      created.
  52  *      [95/12/28            barbou]
  53  *
  54  * $EndLog$
  55  */
  56
  57 /*
  58  * Four possible situations:
  59  *      - We are being included by {var,std}args.h (or anyone) before stdio.h.
  60  *        define real type.
  61  *
  62  *      - We are being included by stdio.h before {var,std}args.h.
  63  *        define hidden type for prototypes in stdio, don't pollute namespace.
  64  *
  65  *      - We are being included by {var,std}args.h after stdio.h.
  66  *        define real type to match hidden type.  no longer use hidden type.
  67  *
  68  *      - We are being included again after defining the real va_list.
  69  *        do nothing.
  70  *
  71  */
  72
  73 #if     !defined(_HIDDEN_VA_LIST) && !defined(_VA_LIST)
  74
  75 /* Define __gnuc_va_list. */
  76
  77 #ifndef __GNUC_VA_LIST
  78 /*
  79  * If this is for internal libc use, don't define
  80  * anything but __gnuc_va_list.
  81  */
  82 #define __GNUC_VA_LIST
  83 typedef struct {
  84   char gpr;                     /* index into the array of 8 GPRs stored in the
  85                                    register save area gpr=0 corresponds to r3,
  86                                    gpr=1 to r4, etc. */
  87   char fpr;                     /* index into the array of 8 FPRs stored in the
  88                                    register save area fpr=0 corresponds to f1,
  89                                    fpr=1 to f2, etc. */
  90   char *overflow_arg_area;      /* location on stack that holds the next
  91                                    overflow argument */
  92   char *reg_save_area;          /* where r3:r10 and f1:f8, if saved are stored */
  93 } __gnuc_va_list[1];
  94
  95 #endif /* not __GNUC_VA_LIST */
  96
  97 #define _VA_LIST
  98 typedef struct {
  99   char gpr;                     /* index into the array of 8 GPRs stored in the
 100                                    register save area gpr=0 corresponds to r3,
 101                                    gpr=1 to r4, etc. */
 102   char fpr;                     /* index into the array of 8 FPRs stored in the
 103                                    register save area fpr=0 corresponds to f1,
 104                                    fpr=1 to f2, etc. */
 105   char *overflow_arg_area;      /* location on stack that holds the next
 106                                    overflow argument */
 107   char *reg_save_area;          /* where r3:r10 and f1:f8, if saved are stored */
 108 } va_list[1];
 109
 110 #elif   defined(_HIDDEN_VA_LIST) && !defined(_VA_LIST)
 111
 112 #define _VA_LIST
 113 typedef struct {
 114   char gpr;                     /* index into the array of 8 GPRs stored in the
 115                                    register save area gpr=0 corresponds to r3,
 116                                    gpr=1 to r4, etc. */
 117   char fpr;                     /* index into the array of 8 FPRs stored in the
 118                                    register save area fpr=0 corresponds to f1,
 119                                    fpr=1 to f2, etc. */
 120   char *overflow_arg_area;      /* location on stack that holds the next
 121                                    overflow argument */
 122   char *reg_save_area;          /* where r3:r10 and f1:f8, if saved are stored */
 123 } __va_list[1];
 124
 125 #elif   defined(_HIDDEN_VA_LIST) && defined(_VA_LIST)
 126
 127 #undef _HIDDEN_VA_LIST
 128 typedef __va_list va_list;
 129
 130 #endif
 131
 132 #endif