1/* 2 * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_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. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* 29 * @OSF_COPYRIGHT@ 30 */ 31/* 32 * Mach Operating System 33 * Copyright (c) 1991,1990 Carnegie Mellon University 34 * All Rights Reserved. 35 * 36 * Permission to use, copy, modify and distribute this software and its 37 * documentation is hereby granted, provided that both the copyright 38 * notice and this permission notice appear in all copies of the 39 * software, derivative works or modified versions, and any portions 40 * thereof, and that both notices appear in supporting documentation. 41 * 42 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 43 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 44 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 45 * 46 * Carnegie Mellon requests users of this software to return to 47 * 48 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 49 * School of Computer Science 50 * Carnegie Mellon University 51 * Pittsburgh PA 15213-3890 52 * 53 * any improvements or extensions that they make and grant Carnegie Mellon 54 * the rights to redistribute these changes. 55 */ 56/* 57 */ 58 59/* 60 * Kernel task state segment. 61 * 62 * We don't use the i386 task switch mechanism. We need a TSS 63 * only to hold the kernel stack pointer for the current thread. 64 */ 65#include <i386/tss.h> 66#include <i386/seg.h> 67#include <mach_kdb.h> 68 69struct i386_tss master_ktss 70 __attribute__ ((section ("__DESC, master_ktss"))) 71 __attribute__ ((aligned (4096))) = { 72 0, /* back link */ 73 0, /* esp0 */ 74 KERNEL_DS, /* ss0 */ 75 0, /* esp1 */ 76 0, /* ss1 */ 77 0, /* esp2 */ 78 0, /* ss2 */ 79 0, /* cr3 */ 80 0, /* eip */ 81 0, /* eflags */ 82 0, /* eax */ 83 0, /* ecx */ 84 0, /* edx */ 85 0, /* ebx */ 86 0, /* esp */ 87 0, /* ebp */ 88 0, /* esi */ 89 0, /* edi */ 90 0, /* es */ 91 0, /* cs */ 92 0, /* ss */ 93 0, /* ds */ 94 0, /* fs */ 95 0, /* gs */ 96 KERNEL_LDT, /* ldt */ 97 0, /* trace_trap */ 98 0x0FFF /* IO bitmap offset - 99 beyond end of TSS segment, 100 so no bitmap */ 101}; 102 103/* 104 * The transient stack for sysenter. 105 * At its top is a 32-bit link to the PCB in legacy mode, 64-bit otherwise. 106 * NB: it also must be large enough to contain a interrupt stack frame 107 * due to a single-step trace trap at system call entry. 108 */ 109struct sysenter_stack master_sstk 110 __attribute__ ((section ("__DESC, master_sstk"))) 111 __attribute__ ((aligned (16))) = { {0}, 0 }; 112 113#ifdef X86_64 114struct x86_64_tss master_ktss64 __attribute__ ((aligned (4096))) = { 115 .io_bit_map_offset = 0x0FFF, 116}; 117#endif /* X86_64 */ 118 119/* 120 * Task structure for double-fault handler: 121 */ 122struct i386_tss master_dftss 123 __attribute__ ((section ("__DESC, master_dftss"))) 124 __attribute__ ((aligned (4096))) = { 125 0, /* back link */ 126 (int) &df_task_stack_end - 4, /* esp0 */ 127 KERNEL_DS, /* ss0 */ 128 0, /* esp1 */ 129 0, /* ss1 */ 130 0, /* esp2 */ 131 0, /* ss2 */ 132 0, /* cr3 */ 133 (int) &df_task_start, /* eip */ 134 0, /* eflags */ 135 0, /* eax */ 136 0, /* ecx */ 137 0, /* edx */ 138 0, /* ebx */ 139 (int) &df_task_stack_end - 4, /* esp */ 140 0, /* ebp */ 141 0, /* esi */ 142 0, /* edi */ 143 KERNEL_DS, /* es */ 144 KERNEL_CS, /* cs */ 145 KERNEL_DS, /* ss */ 146 KERNEL_DS, /* ds */ 147 KERNEL_DS, /* fs */ 148 CPU_DATA_GS, /* gs */ 149 KERNEL_LDT, /* ldt */ 150 0, /* trace_trap */ 151 0x0FFF /* IO bitmap offset - 152 beyond end of TSS segment, 153 so no bitmap */ 154}; 155 156 157/* 158 * Task structure for machine_check handler: 159 */ 160struct i386_tss master_mctss 161 __attribute__ ((section ("__DESC, master_mctss"))) 162 __attribute__ ((aligned (4096))) = { 163 0, /* back link */ 164 (int) &mc_task_stack_end - 4, /* esp0 */ 165 KERNEL_DS, /* ss0 */ 166 0, /* esp1 */ 167 0, /* ss1 */ 168 0, /* esp2 */ 169 0, /* ss2 */ 170 0, /* cr3 */ 171 (int) &mc_task_start, /* eip */ 172 0, /* eflags */ 173 0, /* eax */ 174 0, /* ecx */ 175 0, /* edx */ 176 0, /* ebx */ 177 (int) &mc_task_stack_end - 4, /* esp */ 178 0, /* ebp */ 179 0, /* esi */ 180 0, /* edi */ 181 KERNEL_DS, /* es */ 182 KERNEL_CS, /* cs */ 183 KERNEL_DS, /* ss */ 184 KERNEL_DS, /* ds */ 185 KERNEL_DS, /* fs */ 186 CPU_DATA_GS, /* gs */ 187 KERNEL_LDT, /* ldt */ 188 0, /* trace_trap */ 189 0x0FFF /* IO bitmap offset - 190 beyond end of TSS segment, 191 so no bitmap */ 192}; 193 194#if MACH_KDB 195 196struct i386_tss master_dbtss 197 __attribute__ ((section ("__DESC, master_dbtss"))) 198 __attribute__ ((aligned (4096))) = { 199 0, /* back link */ 200 0, /* esp0 */ 201 KERNEL_DS, /* ss0 */ 202 0, /* esp1 */ 203 0, /* ss1 */ 204 0, /* esp2 */ 205 0, /* ss2 */ 206 0, /* cr3 */ 207 0, /* eip */ 208 0, /* eflags */ 209 0, /* eax */ 210 0, /* ecx */ 211 0, /* edx */ 212 0, /* ebx */ 213 0, /* esp */ 214 0, /* ebp */ 215 0, /* esi */ 216 0, /* edi */ 217 KERNEL_DS, /* es */ 218 KERNEL_CS, /* cs */ 219 KERNEL_DS, /* ss */ 220 KERNEL_DS, /* ds */ 221 KERNEL_DS, /* fs */ 222 KERNEL_DS, /* gs */ 223 KERNEL_LDT, /* ldt */ 224 0, /* trace_trap */ 225 0x0FFF /* IO bitmap offset - 226 beyond end of TSS segment, 227 so no bitmap */ 228}; 229 230#endif /* MACH_KDB */ 231