| 1 | /*␊ |
| 2 | * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.␊ |
| 3 | *␊ |
| 4 | * @APPLE_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. Please obtain a copy of the License at␊ |
| 10 | * http://www.opensource.apple.com/apsl/ and read it before using this␊ |
| 11 | * file.␊ |
| 12 | * ␊ |
| 13 | * The Original Code and all software distributed under the License are␊ |
| 14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
| 15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
| 16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.␊ |
| 18 | * Please see the License for the specific language governing rights and␊ |
| 19 | * limitations under the License.␊ |
| 20 | * ␊ |
| 21 | * @APPLE_LICENSE_HEADER_END@␊ |
| 22 | */␊ |
| 23 | /*␊ |
| 24 | * Copyright (c) 1992 NeXT Computer, Inc.␊ |
| 25 | *␊ |
| 26 | * Intel386 Family:␉Processor exception frame.␊ |
| 27 | *␊ |
| 28 | * HISTORY␊ |
| 29 | *␊ |
| 30 | * 31 August 1992 ? at NeXT␊ |
| 31 | *␉Added v86 mode stuff.␊ |
| 32 | *␊ |
| 33 | * 8 June 1992 ? at NeXT␊ |
| 34 | *␉Changed name of write field in err_code_t␊ |
| 35 | *␉which collided with write() in shlib.␊ |
| 36 | *␊ |
| 37 | * 30 March 1992 ? at NeXT␊ |
| 38 | *␉Created.␊ |
| 39 | */␊ |
| 40 | ␊ |
| 41 | #ifndef _ARCH_I386_FRAME_H_␊ |
| 42 | #define _ARCH_I386_FRAME_H_␊ |
| 43 | ␊ |
| 44 | /*␊ |
| 45 | * Format of the error code␊ |
| 46 | * generated by the hardware␊ |
| 47 | * for certain exceptions.␊ |
| 48 | */␊ |
| 49 | ␊ |
| 50 | typedef union err_code {␊ |
| 51 | struct err_code_normal {␊ |
| 52 | ␉unsigned int␉ext␉:1,␊ |
| 53 | ␉␉␉tbl␉:2,␊ |
| 54 | #define ERR_GDT␉␉0␊ |
| 55 | #define ERR_IDT␉␉1␊ |
| 56 | #define ERR_LDT␉␉2␊ |
| 57 | ␉␉␉index␉:13,␊ |
| 58 | ␉␉␉␉:16;␊ |
| 59 | } normal;␊ |
| 60 | struct err_code_pgfault {␊ |
| 61 | ␉unsigned int␉prot␉:1,␊ |
| 62 | ␉␉␉wrtflt␉:1,␊ |
| 63 | ␉␉␉user␉:1,␊ |
| 64 | ␉␉␉␉:29;␊ |
| 65 | } pgfault;␊ |
| 66 | } err_code_t;␊ |
| 67 | ␊ |
| 68 | #include <architecture/i386/sel.h>␊ |
| 69 | ␊ |
| 70 | /*␊ |
| 71 | * The actual hardware exception frame␊ |
| 72 | * is variable in size. An error code is␊ |
| 73 | * only pushed for certain exceptions.␊ |
| 74 | * Previous stack information is only␊ |
| 75 | * pushed for exceptions that cause a␊ |
| 76 | * change in privilege level. The dpl␊ |
| 77 | * field of the saved CS selector can be␊ |
| 78 | * used to determine whether this is the␊ |
| 79 | * case. If the interrupted task was␊ |
| 80 | * executing in v86 mode, then the data␊ |
| 81 | * segment registers are also present in␊ |
| 82 | * the exception frame (in addition to␊ |
| 83 | * previous stack information). This␊ |
| 84 | * case can be determined by examining␊ |
| 85 | * eflags.␊ |
| 86 | */␊ |
| 87 | ␊ |
| 88 | typedef struct except_frame {␊ |
| 89 | err_code_t␉␉err;␊ |
| 90 | unsigned int␉eip;␊ |
| 91 | sel_t␉␉cs;␊ |
| 92 | unsigned int␉␉:0;␊ |
| 93 | unsigned int␉eflags;␊ |
| 94 | unsigned int␉esp;␊ |
| 95 | sel_t␉␉ss;␊ |
| 96 | unsigned int␉␉:0;␊ |
| 97 | unsigned short␉v_es;␊ |
| 98 | unsigned int␉␉:0;␊ |
| 99 | unsigned short␉v_ds;␊ |
| 100 | unsigned int␉␉:0;␊ |
| 101 | unsigned short␉v_fs;␊ |
| 102 | unsigned int␉␉:0;␊ |
| 103 | unsigned short␉v_gs;␊ |
| 104 | unsigned int␉␉:0;␊ |
| 105 | } except_frame_t;␊ |
| 106 | ␊ |
| 107 | /*␊ |
| 108 | * Values in eflags.␊ |
| 109 | */␊ |
| 110 | ␊ |
| 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 | ␊ |
| 126 | #define EFL_CLR␉␉0xfff88028␊ |
| 127 | #define EFL_SET␉␉0x00000002␊ |
| 128 | ␊ |
| 129 | #endif␉/* _ARCH_I386_FRAME_H_ */␊ |
| 130 | |
