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 | * | |
| e5568f75 A |
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. | |
| 1c79356b | 11 | * |
| e5568f75 A |
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 | |
| 1c79356b A |
14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| e5568f75 A |
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. | |
| 1c79356b A |
19 | * |
| 20 | * @APPLE_LICENSE_HEADER_END@ | |
| 21 | */ | |
| 22 | /* | |
| 23 | * @OSF_COPYRIGHT@ | |
| 24 | */ | |
| 25 | /* CMU_ENDHIST */ | |
| 26 | /* | |
| 27 | * Mach Operating System | |
| 28 | * Copyright (c) 1991,1990 Carnegie Mellon University | |
| 29 | * All Rights Reserved. | |
| 30 | * | |
| 31 | * Permission to use, copy, modify and distribute this software and its | |
| 32 | * documentation is hereby granted, provided that both the copyright | |
| 33 | * notice and this permission notice appear in all copies of the | |
| 34 | * software, derivative works or modified versions, and any portions | |
| 35 | * thereof, and that both notices appear in supporting documentation. | |
| 36 | * | |
| 37 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" | |
| 38 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR | |
| 39 | * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. | |
| 40 | * | |
| 41 | * Carnegie Mellon requests users of this software to return to | |
| 42 | * | |
| 43 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU | |
| 44 | * School of Computer Science | |
| 45 | * Carnegie Mellon University | |
| 46 | * Pittsburgh PA 15213-3890 | |
| 47 | * | |
| 48 | * any improvements or extensions that they make and grant Carnegie Mellon | |
| 49 | * the rights to redistribute these changes. | |
| 50 | */ | |
| 51 | /* | |
| 52 | */ | |
| 53 | ||
| 54 | /* | |
| 55 | * Global descriptor table. | |
| 56 | */ | |
| 57 | #include <i386/thread.h> | |
| 58 | #include <i386/seg.h> | |
| 59 | #include <mach/i386/vm_param.h> | |
| 60 | #include <kern/thread.h> | |
| 61 | #include <mach_kdb.h> | |
| 62 | ||
| 63 | #ifdef MACH_BSD | |
| 64 | extern int trap_unix_syscall(void), trap_mach25_syscall(void), | |
| 65 | trap_machdep_syscall(void), syscall(void); | |
| 66 | #endif | |
| 67 | ||
| 68 | struct fake_descriptor gdt[GDTSZ] = { | |
| 69 | /* 0x000 */ { 0, 0, 0, 0 }, /* always NULL */ | |
| 70 | /* 0x008 */ { LINEAR_KERNEL_ADDRESS + VM_MIN_ADDRESS, | |
| 71 | (VM_MAX_KERNEL_ADDRESS-1-VM_MIN_KERNEL_ADDRESS)>>12, | |
| 72 | SZ_32|SZ_G, | |
| 73 | ACC_P|ACC_PL_K|ACC_CODE_R | |
| 74 | }, /* kernel code */ | |
| 75 | /* 0x010 */ { LINEAR_KERNEL_ADDRESS + VM_MIN_ADDRESS, | |
| 76 | (VM_MAX_KERNEL_ADDRESS-1-VM_MIN_KERNEL_ADDRESS)>>12, | |
| 77 | SZ_32|SZ_G, | |
| 78 | ACC_P|ACC_PL_K|ACC_DATA_W | |
| 79 | }, /* kernel data */ | |
| 80 | /* 0x018 */ { LINEAR_KERNEL_ADDRESS + (unsigned int)ldt, | |
| 81 | LDTSZ*sizeof(struct fake_descriptor)-1, | |
| 82 | 0, | |
| 83 | ACC_P|ACC_PL_K|ACC_LDT | |
| 84 | }, /* local descriptor table */ | |
| 85 | /* 0x020 */ { LINEAR_KERNEL_ADDRESS + (unsigned int)&ktss, | |
| 86 | sizeof(struct i386_tss)-1, | |
| 87 | 0, | |
| 88 | ACC_P|ACC_PL_K|ACC_TSS | |
| 89 | }, /* TSS for this processor */ | |
| 90 | #ifdef MACH_BSD | |
| 91 | /* 0x28 */ { (unsigned int) &trap_unix_syscall, | |
| 92 | KERNEL_CS, | |
| 93 | 0, /* no parameters */ | |
| 94 | ACC_P|ACC_PL_U|ACC_CALL_GATE | |
| 95 | }, | |
| 96 | /* 0x30 */ { (unsigned int) &trap_mach25_syscall, | |
| 97 | KERNEL_CS, | |
| 98 | 0, /* no parameters */ | |
| 99 | ACC_P|ACC_PL_U|ACC_CALL_GATE | |
| 100 | }, | |
| 101 | /* 0x38 */ { (unsigned int) &trap_machdep_syscall, | |
| 102 | KERNEL_CS, | |
| 103 | 0, /* no parameters */ | |
| 104 | ACC_P|ACC_PL_U|ACC_CALL_GATE | |
| 105 | }, | |
| 106 | #else | |
| 107 | /* 0x028 */ { 0, 0, 0, 0 }, /* per-thread LDT */ | |
| 108 | /* 0x030 */ { 0, 0, 0, 0 }, /* per-thread TSS for IO bitmap */ | |
| 109 | /* 0x038 */ { 0, 0, 0, 0 }, | |
| 110 | #endif | |
| 111 | /* 0x040 */ { 0, 0, 0, 0 }, | |
| 112 | /* 0x048 */ { LINEAR_KERNEL_ADDRESS + (unsigned int)&cpu_data[0], | |
| 113 | sizeof(cpu_data)-1, | |
| 114 | SZ_32, | |
| 115 | ACC_P|ACC_PL_K|ACC_DATA_W | |
| 116 | }, /* per-CPU current thread address */ | |
| 117 | #if MACH_KDB | |
| 118 | /* 0x050 */ { LINEAR_KERNEL_ADDRESS + (unsigned int)&dbtss, | |
| 119 | sizeof(struct i386_tss)-1, | |
| 120 | 0, | |
| 121 | ACC_P|ACC_PL_K|ACC_TSS | |
| 122 | } /* TSS for this processor */ | |
| 123 | #endif /* MACH_KDB */ | |
| 124 | }; |