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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
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.
11: *
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
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /*
23: * @OSF_COPYRIGHT@
24: */
25: /*
26: * Mach Operating System
27: * Copyright (c) 1991,1990 Carnegie Mellon University
28: * All Rights Reserved.
29: *
30: * Permission to use, copy, modify and distribute this software and its
31: * documentation is hereby granted, provided that both the copyright
32: * notice and this permission notice appear in all copies of the
33: * software, derivative works or modified versions, and any portions
34: * thereof, and that both notices appear in supporting documentation.
35: *
36: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
37: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
38: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
39: *
40: * Carnegie Mellon requests users of this software to return to
41: *
42: * Software Distribution Coordinator or [email protected]
43: * School of Computer Science
44: * Carnegie Mellon University
45: * Pittsburgh PA 15213-3890
46: *
47: * any improvements or extensions that they make and grant Carnegie Mellon
48: * the rights to redistribute these changes.
49: */
50: /*
51: */
52:
53: /*
54: * Kernel task state segment.
55: *
56: * We don't use the i386 task switch mechanism. We need a TSS
57: * only to hold the kernel stack pointer for the current thread.
58: *
59: * XXX multiprocessor??
60: */
61: #include <i386/tss.h>
62: #include <i386/seg.h>
63: #include <mach_kdb.h>
64:
65: struct i386_tss ktss = {
66: 0, /* back link */
67: 0, /* esp0 */
68: KERNEL_DS, /* ss0 */
69: 0, /* esp1 */
70: 0, /* ss1 */
71: 0, /* esp2 */
72: 0, /* ss2 */
73: 0, /* cr3 */
74: 0, /* eip */
75: 0, /* eflags */
76: 0, /* eax */
77: 0, /* ecx */
78: 0, /* edx */
79: 0, /* ebx */
80: 0, /* esp */
81: 0, /* ebp */
82: 0, /* esi */
83: 0, /* edi */
84: 0, /* es */
85: 0, /* cs */
86: 0, /* ss */
87: 0, /* ds */
88: 0, /* fs */
89: 0, /* gs */
90: KERNEL_LDT, /* ldt */
91: 0, /* trace_trap */
92: 0x0FFF /* IO bitmap offset -
93: beyond end of TSS segment,
94: so no bitmap */
95: };
96:
97: #if MACH_KDB
98:
99: struct i386_tss dbtss = {
100: 0, /* back link */
101: 0, /* esp0 */
102: KERNEL_DS, /* ss0 */
103: 0, /* esp1 */
104: 0, /* ss1 */
105: 0, /* esp2 */
106: 0, /* ss2 */
107: 0, /* cr3 */
108: 0, /* eip */
109: 0, /* eflags */
110: 0, /* eax */
111: 0, /* ecx */
112: 0, /* edx */
113: 0, /* ebx */
114: 0, /* esp */
115: 0, /* ebp */
116: 0, /* esi */
117: 0, /* edi */
118: KERNEL_DS, /* es */
119: KERNEL_CS, /* cs */
120: KERNEL_DS, /* ss */
121: KERNEL_DS, /* ds */
122: KERNEL_DS, /* fs */
123: KERNEL_DS, /* gs */
124: KERNEL_LDT, /* ldt */
125: 0, /* trace_trap */
126: 0x0FFF /* IO bitmap offset -
127: beyond end of TSS segment,
128: so no bitmap */
129: };
130:
131: #endif /* MACH_KDB */
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