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Annotation of kernel/machdep/ppc/frame.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: #ifndef        _MACHDEP_PPC_FRAME_
        !            26: #define        _MACHDEP_PPC_FRAME_
        !            27: 
        !            28: #ifndef        __ASSEMBLER__
        !            29: /*
        !            30:  * Frame Marker
        !            31:  */
        !            32: #ifndef        LOCORE
        !            33: /*
        !            34: **     These are defined int the PowerPC Runtime Conventions Doc ch 4
        !            35: */
        !            36: struct linkage_area {
        !            37:        int     saved_sp;       /* Back chain */
        !            38:        int     saved_cr;       /* Link Save word */
        !            39:        int     saved_lr;       /* Local variable space */
        !            40:        int     saved_rsv0;     /* FPSCR save area */
        !            41:        int     saved_rsv1;     /* CR save area */
        !            42:        int     saved_r2;       /* General register save area */
        !            43: };
        !            44: typedef struct linkage_area linkage_area_t;
        !            45: typedef linkage_area_t *linkage_areaPtr_t;
        !            46: 
        !            47: struct reg_param_area {
        !            48:        int     saved_p0;
        !            49:        int     saved_p1;
        !            50:        int     saved_p2;
        !            51:        int     saved_p3;
        !            52:        int     saved_p4;
        !            53:        int     saved_p5;
        !            54:        int     saved_p6;
        !            55:        int     saved_p7;
        !            56: };
        !            57: typedef struct reg_param_area reg_param_area_t;
        !            58: typedef reg_param_area_t *reg_param_areaPtr_t;
        !            59: 
        !            60: 
        !            61: struct stack_param_area {
        !            62:        int     saved_p8;
        !            63:        int     saved_p9;
        !            64:        int     saved_p10;
        !            65:        int     saved_p11;
        !            66: };
        !            67: typedef struct stack_param_area stack_param_area_t;
        !            68: typedef stack_param_area_t *stack_param_areaPtr_t;
        !            69: 
        !            70: struct frame_area {
        !            71:        struct linkage_area     la;
        !            72:        struct reg_param_area   rpa;
        !            73:        struct stack_param_area spa;
        !            74: };
        !            75: typedef struct frame_area frame_area_t;
        !            76: typedef frame_area_t *frame_areaPtr_t;
        !            77: 
        !            78: struct param_area {
        !            79:        struct reg_param_area   rpa;
        !            80:        struct stack_param_area spa;
        !            81: };
        !            82: typedef struct param_area param_area_t;
        !            83: typedef param_area_t *param_areaPtr_t;
        !            84: 
        !            85: struct stack_frame {
        !            86:        struct linkage_area     la;
        !            87:        struct param_area       pa;
        !            88: };
        !            89: typedef struct stack_area stack_area_t;
        !            90: typedef stack_area_t *stack_areaPtr_t;
        !            91: 
        !            92: /*
        !            93: ** some helpful defines
        !            94: */
        !            95: #define        NARGS           (sizeof(struct param_area)/ sizeof(int))
        !            96: #define        MAXREGARGS      (sizeof(struct reg_param_area)/ sizeof(int))
        !            97: 
        !            98: 
        !            99: 
        !           100: 
        !           101: /*
        !           102:  * redzone is the area under the stack pointer which must be preserved
        !           103:  * when taking a trap, interrupt etc. This is no longer needed as gcc
        !           104:  * (2.7.2 and above) now follows ELF spec correctly and never loads/stores
        !           105:  * below the frame pointer
        !           106:  */
        !           107: struct redzone {
        !           108:                                        /* save register area */
        !           109:        int     save_reg13;
        !           110:        int     save_reg14;
        !           111:        int     save_reg15;
        !           112:        int     save_reg16;
        !           113:        int     save_reg17;
        !           114:        int     save_reg18;
        !           115:        int     save_reg19;
        !           116:        int     save_reg20;
        !           117:        int     save_reg21;
        !           118:        int     save_reg22;
        !           119:        int     save_reg23;
        !           120:        int     save_reg24;
        !           121:        int     save_reg25;
        !           122:        int     save_reg26;
        !           123:        int     save_reg27;
        !           124:        int     save_reg28;
        !           125:        int     save_reg29;
        !           126:        int     save_reg30;
        !           127:        int     save_reg31;
        !           128: 
        !           129:        double  save_fpu14;
        !           130:        double  save_fpu15;
        !           131:        double  save_fpu16;
        !           132:        double  save_fpu17;
        !           133:        double  save_fpu18;
        !           134:        double  save_fpu19;
        !           135:        double  save_fpu20;
        !           136:        double  save_fpu21;
        !           137:        double  save_fpu22;
        !           138:        double  save_fpu23;
        !           139:        double  save_fpu24;
        !           140:        double  save_fpu25;
        !           141:        double  save_fpu26;
        !           142:        double  save_fpu27;
        !           143:        double  save_fpu28;
        !           144:        double  save_fpu29;
        !           145:        double  save_fpu30;
        !           146:        double  save_fpu31;
        !           147: 
        !           148:        int     round;
        !           149: };
        !           150: #endif
        !           151: 
        !           152: #endif /* __ASSEMBLER__ */
        !           153: 
        !           154: /*
        !           155:  * Useful Constants
        !           156:  */
        !           157: #define        NUMARGREGS      8               /* number of arguments in registers */
        !           158: 
        !           159: /*
        !           160:  * Assembly Language Offsets for Argument or Stack Pointer
        !           161:  *     to Status Save and Function Return Areas
        !           162:  *     (should use genassym to get these offsets)
        !           163:  */
        !           164: 
        !           165: #endif /* _MACHDEP_PPC_FRAME_ */

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