/* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The 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, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1992 NeXT Computer, Inc. * * Intel386 Family: Task State Segment. * * HISTORY * * 29 March 1992 ? at NeXT * Created. */ #include <architecture/i386/sel.h> /* * Task State segment. */ typedef struct tss { sel_t oldtss; unsigned int :0; unsigned int esp0; sel_t ss0; unsigned int :0; unsigned int esp1; sel_t ss1; unsigned int :0; unsigned int esp2; sel_t ss2; unsigned int :0; unsigned int cr3; unsigned int eip; unsigned int eflags; unsigned int eax; unsigned int ecx; unsigned int edx; unsigned int ebx; unsigned int esp; unsigned int ebp; unsigned int esi; unsigned int edi; sel_t es; unsigned int :0; sel_t cs; unsigned int :0; sel_t ss; unsigned int :0; sel_t ds; unsigned int :0; sel_t fs; unsigned int :0; sel_t gs; unsigned int :0; sel_t ldt; unsigned int :0; unsigned int t :1, :15, io_bmap :16; } tss_t; #define TSS_SIZE(n) (sizeof (struct tss) + (n)) /* * Task State segment descriptor. */ typedef struct tss_desc { unsigned short limit00; unsigned short base00; unsigned char base16; unsigned char type :5, #define DESC_TSS 0x09 dpl :2, present :1; unsigned char limit16 :4, :3, granular:1; unsigned char base24; } tss_desc_t; /* * Task gate descriptor. */ typedef struct task_gate { unsigned short :16; sel_t tss; unsigned int :8, type :5, #define DESC_TASK_GATE 0x05 dpl :2, present :1, :0; } task_gate_t;