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 | * | |
| ff6e181a A |
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. | |
| 1c79356b | 12 | * |
| ff6e181a A |
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 | |
| 1c79356b A |
15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| ff6e181a A |
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. | |
| 1c79356b A |
20 | * |
| 21 | * @APPLE_LICENSE_HEADER_END@ | |
| 22 | */ | |
| 23 | /* | |
| 24 | * Copyright (c) 1992 NeXT Computer, Inc. | |
| 25 | * | |
| 26 | * Intel386 Family: Task State Segment. | |
| 27 | * | |
| 28 | * HISTORY | |
| 29 | * | |
| 30 | * 29 March 1992 ? at NeXT | |
| 31 | * Created. | |
| 32 | */ | |
| 33 | ||
| 34 | #include <architecture/i386/sel.h> | |
| 35 | ||
| 36 | /* | |
| 37 | * Task State segment. | |
| 38 | */ | |
| 39 | ||
| 40 | typedef struct tss { | |
| 41 | sel_t oldtss; | |
| 42 | unsigned int :0; | |
| 43 | unsigned int esp0; | |
| 44 | sel_t ss0; | |
| 45 | unsigned int :0; | |
| 46 | unsigned int esp1; | |
| 47 | sel_t ss1; | |
| 48 | unsigned int :0; | |
| 49 | unsigned int esp2; | |
| 50 | sel_t ss2; | |
| 51 | unsigned int :0; | |
| 52 | unsigned int cr3; | |
| 53 | unsigned int eip; | |
| 54 | unsigned int eflags; | |
| 55 | unsigned int eax; | |
| 56 | unsigned int ecx; | |
| 57 | unsigned int edx; | |
| 58 | unsigned int ebx; | |
| 59 | unsigned int esp; | |
| 60 | unsigned int ebp; | |
| 61 | unsigned int esi; | |
| 62 | unsigned int edi; | |
| 63 | sel_t es; | |
| 64 | unsigned int :0; | |
| 65 | sel_t cs; | |
| 66 | unsigned int :0; | |
| 67 | sel_t ss; | |
| 68 | unsigned int :0; | |
| 69 | sel_t ds; | |
| 70 | unsigned int :0; | |
| 71 | sel_t fs; | |
| 72 | unsigned int :0; | |
| 73 | sel_t gs; | |
| 74 | unsigned int :0; | |
| 75 | sel_t ldt; | |
| 76 | unsigned int :0; | |
| 77 | unsigned int t :1, | |
| 78 | :15, | |
| 79 | io_bmap :16; | |
| 80 | } tss_t; | |
| 81 | ||
| 82 | #define TSS_SIZE(n) (sizeof (struct tss) + (n)) | |
| 83 | ||
| 84 | /* | |
| 85 | * Task State segment descriptor. | |
| 86 | */ | |
| 87 | ||
| 88 | typedef struct tss_desc { | |
| 89 | unsigned short limit00; | |
| 90 | unsigned short base00; | |
| 91 | unsigned char base16; | |
| 92 | unsigned char type :5, | |
| 93 | #define DESC_TSS 0x09 | |
| 94 | dpl :2, | |
| 95 | present :1; | |
| 96 | unsigned char limit16 :4, | |
| 97 | :3, | |
| 98 | granular:1; | |
| 99 | unsigned char base24; | |
| 100 | } tss_desc_t; | |
| 101 | ||
| 102 | /* | |
| 103 | * Task gate descriptor. | |
| 104 | */ | |
| 105 | ||
| 106 | typedef struct task_gate { | |
| 107 | unsigned short :16; | |
| 108 | sel_t tss; | |
| 109 | unsigned int :8, | |
| 110 | type :5, | |
| 111 | #define DESC_TASK_GATE 0x05 | |
| 112 | dpl :2, | |
| 113 | present :1, | |
| 114 | :0; | |
| 115 | } task_gate_t; |