/* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ */ /* CMU_ENDHIST */ /* * Mach Operating System * Copyright (c) 1991,1990 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ /* */ /* * Global descriptor table. */ #include <mach/machine.h> #include <mach/i386/vm_param.h> #include <kern/thread.h> #include <i386/cpu_data.h> #include <i386/mp_desc.h> #ifdef MACH_BSD extern int trap_unix_syscall(void), trap_mach25_syscall(void), trap_machdep_syscall(void), syscall(void); #endif struct fake_descriptor gdt[GDTSZ] = { /* 0x000 */ { 0, 0, 0, 0 }, /* always NULL */ /* 0x008 */ { 0, 0xfffff, SZ_32|SZ_G, ACC_P|ACC_PL_K|ACC_CODE_R }, /* kernel code */ /* 0x010 */ { 0, 0xfffff, SZ_32|SZ_G, ACC_P|ACC_PL_K|ACC_DATA_W }, /* kernel data */ /* 0x018 */ { (unsigned int)ldt, LDTSZ*sizeof(struct fake_descriptor)-1, 0, ACC_P|ACC_PL_K|ACC_LDT }, /* local descriptor table */ /* 0x020 */ { (unsigned int)&ktss, sizeof(struct i386_tss)-1, 0, ACC_P|ACC_PL_K|ACC_TSS }, /* TSS for this processor */ #ifdef MACH_BSD /* 0x28 */ { (unsigned int) &trap_unix_syscall, KERNEL_CS, 0, /* no parameters */ ACC_P|ACC_PL_U|ACC_CALL_GATE }, /* 0x30 */ { (unsigned int) &trap_mach25_syscall, KERNEL_CS, 0, /* no parameters */ ACC_P|ACC_PL_U|ACC_CALL_GATE }, /* 0x38 */ { (unsigned int) &trap_machdep_syscall, KERNEL_CS, 0, /* no parameters */ ACC_P|ACC_PL_U|ACC_CALL_GATE }, #else /* 0x028 */ { 0, 0, 0, 0 }, /* per-thread LDT */ /* 0x030 */ { 0, 0, 0, 0 }, /* per-thread TSS for IO bitmap */ /* 0x038 */ { 0, 0, 0, 0 }, #endif /* 0x040 */ { 0, 0, 0, 0 }, /* 0x048 */ { (unsigned int)&cpu_data_master, sizeof(cpu_data_t)-1, SZ_32, ACC_P|ACC_PL_K|ACC_DATA_W }, /* per-CPU current thread address */ #if MACH_KDB /* 0x050 */ { (unsigned int)&dbtss, sizeof(struct i386_tss)-1, 0, ACC_P|ACC_PL_K|ACC_TSS } /* TSS for this processor */ #endif /* MACH_KDB */ };