projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c79356b A |
1 | /* |
| 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| e5568f75 A |
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. | |
| 1c79356b | 11 | * |
| e5568f75 A |
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 | |
| 1c79356b A |
14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| e5568f75 A |
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. | |
| 1c79356b A |
19 | * |
| 20 | * @APPLE_LICENSE_HEADER_END@ | |
| 21 | */ | |
| 22 | /* | |
| 23 | * Copyright (c) 1992 NeXT Computer, Inc. | |
| 24 | * | |
| 25 | * Intel386 Family: Processor exception frame. | |
| 26 | * | |
| 27 | * HISTORY | |
| 28 | * | |
| 29 | * 31 August 1992 ? at NeXT | |
| 30 | * Added v86 mode stuff. | |
| 31 | * | |
| 32 | * 8 June 1992 ? at NeXT | |
| 33 | * Changed name of write field in err_code_t | |
| 34 | * which collided with write() in shlib. | |
| 35 | * | |
| 36 | * 30 March 1992 ? at NeXT | |
| 37 | * Created. | |
| 38 | */ | |
| 39 | ||
| 40 | /* | |
| 41 | * Format of the error code | |
| 42 | * generated by the hardware | |
| 43 | * for certain exceptions. | |
| 44 | */ | |
| 45 | ||
| 46 | typedef union err_code { | |
| 47 | struct err_code_normal { | |
| 48 | unsigned int ext :1, | |
| 49 | tbl :2, | |
| 50 | #define ERR_GDT 0 | |
| 51 | #define ERR_IDT 1 | |
| 52 | #define ERR_LDT 2 | |
| 53 | index :13, | |
| 54 | :16; | |
| 55 | } normal; | |
| 56 | struct err_code_pgfault { | |
| 57 | unsigned int prot :1, | |
| 58 | wrtflt :1, | |
| 59 | user :1, | |
| 60 | :29; | |
| 61 | } pgfault; | |
| 62 | } err_code_t; | |
| 63 | ||
| 64 | #include <architecture/i386/sel.h> | |
| 65 | ||
| 66 | /* | |
| 67 | * The actual hardware exception frame | |
| 68 | * is variable in size. An error code is | |
| 69 | * only pushed for certain exceptions. | |
| 70 | * Previous stack information is only | |
| 71 | * pushed for exceptions that cause a | |
| 72 | * change in privilege level. The dpl | |
| 73 | * field of the saved CS selector can be | |
| 74 | * used to determine whether this is the | |
| 75 | * case. If the interrupted task was | |
| 76 | * executing in v86 mode, then the data | |
| 77 | * segment registers are also present in | |
| 78 | * the exception frame (in addition to | |
| 79 | * previous stack information). This | |
| 80 | * case can be determined by examining | |
| 81 | * eflags. | |
| 82 | */ | |
| 83 | ||
| 84 | typedef struct except_frame { | |
| 85 | err_code_t err; | |
| 86 | unsigned int eip; | |
| 87 | sel_t cs; | |
| 88 | unsigned int :0; | |
| 89 | unsigned int eflags; | |
| 90 | unsigned int esp; | |
| 91 | sel_t ss; | |
| 92 | unsigned int :0; | |
| 93 | unsigned short v_es; | |
| 94 | unsigned int :0; | |
| 95 | unsigned short v_ds; | |
| 96 | unsigned int :0; | |
| 97 | unsigned short v_fs; | |
| 98 | unsigned int :0; | |
| 99 | unsigned short v_gs; | |
| 100 | unsigned int :0; | |
| 101 | } except_frame_t; | |
| 102 | ||
| 103 | /* | |
| 104 | * Values in eflags. | |
| 105 | */ | |
| 106 | ||
| 107 | #ifndef EFL_CF /* FIXME */ | |
| 108 | #define EFL_CF 0x00001 | |
| 109 | #define EFL_PF 0x00004 | |
| 110 | #define EFL_AF 0x00010 | |
| 111 | #define EFL_ZF 0x00040 | |
| 112 | #define EFL_SF 0x00080 | |
| 113 | #define EFL_TF 0x00100 | |
| 114 | #define EFL_IF 0x00200 | |
| 115 | #define EFL_DF 0x00400 | |
| 116 | #define EFL_OF 0x00800 | |
| 117 | #define EFL_IOPL 0x03000 | |
| 118 | #define EFL_NT 0x04000 | |
| 119 | #define EFL_RF 0x10000 | |
| 120 | #define EFL_VM 0x20000 | |
| 121 | #define EFL_AC 0x40000 | |
| 122 | #endif | |
| 123 | ||
| 124 | #define EFL_CLR 0xfff88028 | |
| 125 | #define EFL_SET 0x00000002 |