| | 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 | |
| | 69 | struct 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 | */ |
| | 109 | struct sysenter_stack master_sstk |
| | 110 | __attribute__ ((section ("__DESC, master_sstk"))) |
| | 111 | __attribute__ ((aligned (16))) = { {0}, 0 }; |
| | 112 | |
| | 113 | #ifdef X86_64 |
| | 114 | struct 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 | */ |
| | 122 | struct 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 | */ |
| | 160 | struct 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 | |
| | 196 | struct 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 */ |
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