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Annotation of XNU/osfmk/libsa/ppc/va_list.h, revision 1.1

1.1     ! root        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: #if !defined(APPLE) && !defined(NeXT)
        !            23: /*
        !            24:  * @OSF_COPYRIGHT@
        !            25:  */
        !            26: /*
        !            27:  * HISTORY
        !            28:  * 
        !            29:  * Revision 1.1.1.1  1998/09/22 21:05:51  wsanchez
        !            30:  * Import of Mac OS X kernel (~semeria)
        !            31:  *
        !            32:  * Revision 1.1.1.1  1998/03/07 02:25:36  wsanchez
        !            33:  * Import of OSF Mach kernel (~mburg)
        !            34:  *
        !            35:  * Revision 1.1.2.1  1996/12/09  16:59:07  stephen
        !            36:  *     nmklinux_1.0b3_shared into pmk1.1
        !            37:  *     [1996/12/09  11:18:59  stephen]
        !            38:  *
        !            39:  * Revision 1.1.4.1  1996/04/11  14:37:05  emcmanus
        !            40:  *     Copied from mainline.ppc.
        !            41:  *     [1996/04/11  14:36:22  emcmanus]
        !            42:  * 
        !            43:  * Revision 1.1.2.1  1995/12/28  16:37:24  barbou
        !            44:  *     Self-Contained Mach Distribution:
        !            45:  *     created.
        !            46:  *     [95/12/28            barbou]
        !            47:  * 
        !            48:  * $EndLog$
        !            49:  */
        !            50: 
        !            51: /*
        !            52:  * Four possible situations:
        !            53:  *     - We are being included by {var,std}args.h (or anyone) before stdio.h.
        !            54:  *       define real type.
        !            55:  *
        !            56:  *     - We are being included by stdio.h before {var,std}args.h.
        !            57:  *       define hidden type for prototypes in stdio, don't pollute namespace.
        !            58:  * 
        !            59:  *     - We are being included by {var,std}args.h after stdio.h.
        !            60:  *       define real type to match hidden type.  no longer use hidden type.
        !            61:  * 
        !            62:  *     - We are being included again after defining the real va_list.
        !            63:  *       do nothing.
        !            64:  * 
        !            65:  */
        !            66: 
        !            67: #if    !defined(_HIDDEN_VA_LIST) && !defined(_VA_LIST)
        !            68: 
        !            69: /* Define __gnuc_va_list. */
        !            70: 
        !            71: #ifndef __GNUC_VA_LIST
        !            72: /*
        !            73:  * If this is for internal libc use, don't define
        !            74:  * anything but __gnuc_va_list.
        !            75:  */
        !            76: #define __GNUC_VA_LIST
        !            77: typedef struct {
        !            78:   char gpr;                    /* index into the array of 8 GPRs stored in the
        !            79:                                   register save area gpr=0 corresponds to r3,
        !            80:                                   gpr=1 to r4, etc. */
        !            81:   char fpr;                    /* index into the array of 8 FPRs stored in the
        !            82:                                   register save area fpr=0 corresponds to f1,
        !            83:                                   fpr=1 to f2, etc. */
        !            84:   char *overflow_arg_area;     /* location on stack that holds the next
        !            85:                                   overflow argument */
        !            86:   char *reg_save_area;         /* where r3:r10 and f1:f8, if saved are stored */
        !            87: } __gnuc_va_list[1];
        !            88: 
        !            89: #endif /* not __GNUC_VA_LIST */
        !            90: 
        !            91: #define _VA_LIST
        !            92: typedef struct {
        !            93:   char gpr;                    /* index into the array of 8 GPRs stored in the
        !            94:                                   register save area gpr=0 corresponds to r3,
        !            95:                                   gpr=1 to r4, etc. */
        !            96:   char fpr;                    /* index into the array of 8 FPRs stored in the
        !            97:                                   register save area fpr=0 corresponds to f1,
        !            98:                                   fpr=1 to f2, etc. */
        !            99:   char *overflow_arg_area;     /* location on stack that holds the next
        !           100:                                   overflow argument */
        !           101:   char *reg_save_area;         /* where r3:r10 and f1:f8, if saved are stored */
        !           102: } va_list[1];
        !           103: 
        !           104: #elif  defined(_HIDDEN_VA_LIST) && !defined(_VA_LIST)
        !           105: 
        !           106: #define _VA_LIST
        !           107: typedef struct {
        !           108:   char gpr;                    /* index into the array of 8 GPRs stored in the
        !           109:                                   register save area gpr=0 corresponds to r3,
        !           110:                                   gpr=1 to r4, etc. */
        !           111:   char fpr;                    /* index into the array of 8 FPRs stored in the
        !           112:                                   register save area fpr=0 corresponds to f1,
        !           113:                                   fpr=1 to f2, etc. */
        !           114:   char *overflow_arg_area;     /* location on stack that holds the next
        !           115:                                   overflow argument */
        !           116:   char *reg_save_area;         /* where r3:r10 and f1:f8, if saved are stored */
        !           117: } __va_list[1];
        !           118: 
        !           119: #elif  defined(_HIDDEN_VA_LIST) && defined(_VA_LIST)
        !           120: 
        !           121: #undef _HIDDEN_VA_LIST
        !           122: typedef __va_list va_list;
        !           123: 
        !           124: #endif
        !           125: 
        !           126: #endif

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