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 | * | |
| 43866e37 | 6 | * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. |
| 1c79356b | 7 | * |
| 43866e37 A |
8 | * This file contains Original Code and/or Modifications of Original Code |
| 9 | * as defined in and that are subject to the Apple Public Source License | |
| 10 | * Version 2.0 (the 'License'). You may not use this file except in | |
| 11 | * compliance with the License. Please obtain a copy of the License at | |
| 12 | * http://www.opensource.apple.com/apsl/ and read it before using this | |
| 13 | * file. | |
| 14 | * | |
| 15 | * The Original Code and all software distributed under the License are | |
| 16 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 1c79356b A |
17 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 18 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 43866e37 A |
19 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| 20 | * Please see the License for the specific language governing rights and | |
| 21 | * limitations under the License. | |
| 1c79356b A |
22 | * |
| 23 | * @APPLE_LICENSE_HEADER_END@ | |
| 24 | */ | |
| 25 | /* | |
| 26 | * Copyright (c) 1992 NeXT Computer, Inc. | |
| 27 | * | |
| 28 | * Intel386 Family: Processor exception frame. | |
| 29 | * | |
| 30 | * HISTORY | |
| 31 | * | |
| 32 | * 31 August 1992 ? at NeXT | |
| 33 | * Added v86 mode stuff. | |
| 34 | * | |
| 35 | * 8 June 1992 ? at NeXT | |
| 36 | * Changed name of write field in err_code_t | |
| 37 | * which collided with write() in shlib. | |
| 38 | * | |
| 39 | * 30 March 1992 ? at NeXT | |
| 40 | * Created. | |
| 41 | */ | |
| 42 | ||
| 43 | /* | |
| 44 | * Format of the error code | |
| 45 | * generated by the hardware | |
| 46 | * for certain exceptions. | |
| 47 | */ | |
| 48 | ||
| 49 | typedef union err_code { | |
| 50 | struct err_code_normal { | |
| 51 | unsigned int ext :1, | |
| 52 | tbl :2, | |
| 53 | #define ERR_GDT 0 | |
| 54 | #define ERR_IDT 1 | |
| 55 | #define ERR_LDT 2 | |
| 56 | index :13, | |
| 57 | :16; | |
| 58 | } normal; | |
| 59 | struct err_code_pgfault { | |
| 60 | unsigned int prot :1, | |
| 61 | wrtflt :1, | |
| 62 | user :1, | |
| 63 | :29; | |
| 64 | } pgfault; | |
| 65 | } err_code_t; | |
| 66 | ||
| 67 | #include <architecture/i386/sel.h> | |
| 68 | ||
| 69 | /* | |
| 70 | * The actual hardware exception frame | |
| 71 | * is variable in size. An error code is | |
| 72 | * only pushed for certain exceptions. | |
| 73 | * Previous stack information is only | |
| 74 | * pushed for exceptions that cause a | |
| 75 | * change in privilege level. The dpl | |
| 76 | * field of the saved CS selector can be | |
| 77 | * used to determine whether this is the | |
| 78 | * case. If the interrupted task was | |
| 79 | * executing in v86 mode, then the data | |
| 80 | * segment registers are also present in | |
| 81 | * the exception frame (in addition to | |
| 82 | * previous stack information). This | |
| 83 | * case can be determined by examining | |
| 84 | * eflags. | |
| 85 | */ | |
| 86 | ||
| 87 | typedef struct except_frame { | |
| 88 | err_code_t err; | |
| 89 | unsigned int eip; | |
| 90 | sel_t cs; | |
| 91 | unsigned int :0; | |
| 92 | unsigned int eflags; | |
| 93 | unsigned int esp; | |
| 94 | sel_t ss; | |
| 95 | unsigned int :0; | |
| 96 | unsigned short v_es; | |
| 97 | unsigned int :0; | |
| 98 | unsigned short v_ds; | |
| 99 | unsigned int :0; | |
| 100 | unsigned short v_fs; | |
| 101 | unsigned int :0; | |
| 102 | unsigned short v_gs; | |
| 103 | unsigned int :0; | |
| 104 | } except_frame_t; | |
| 105 | ||
| 106 | /* | |
| 107 | * Values in eflags. | |
| 108 | */ | |
| 109 | ||
| 110 | #ifndef EFL_CF /* FIXME */ | |
| 111 | #define EFL_CF 0x00001 | |
| 112 | #define EFL_PF 0x00004 | |
| 113 | #define EFL_AF 0x00010 | |
| 114 | #define EFL_ZF 0x00040 | |
| 115 | #define EFL_SF 0x00080 | |
| 116 | #define EFL_TF 0x00100 | |
| 117 | #define EFL_IF 0x00200 | |
| 118 | #define EFL_DF 0x00400 | |
| 119 | #define EFL_OF 0x00800 | |
| 120 | #define EFL_IOPL 0x03000 | |
| 121 | #define EFL_NT 0x04000 | |
| 122 | #define EFL_RF 0x10000 | |
| 123 | #define EFL_VM 0x20000 | |
| 124 | #define EFL_AC 0x40000 | |
| 125 | #endif | |
| 126 | ||
| 127 | #define EFL_CLR 0xfff88028 | |
| 128 | #define EFL_SET 0x00000002 |