98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/*
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* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* Copyright (c) 1992 NeXT Computer, Inc.
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*
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* Intel386 Family: Descriptor tables.
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*
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* HISTORY
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*
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* 30 March 1992 ? at NeXT
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* Created.
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*/
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#include <architecture/i386/desc.h>
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#include <architecture/i386/tss.h>
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/*
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* A totally generic descriptor
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* table entry.
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*/
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typedef union dt_entry {
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code_desc_t code;
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data_desc_t data;
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ldt_desc_t ldt;
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tss_desc_t task_state;
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call_gate_t call_gate;
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trap_gate_t trap_gate;
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intr_gate_t intr_gate;
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task_gate_t task_gate;
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} dt_entry_t;
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#define DESC_TBL_MAX 8192
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/*
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* Global descriptor table.
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*/
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typedef union gdt_entry {
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code_desc_t code;
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data_desc_t data;
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ldt_desc_t ldt;
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call_gate_t call_gate;
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task_gate_t task_gate;
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tss_desc_t task_state;
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} gdt_entry_t;
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typedef gdt_entry_t gdt_t;
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/*
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* Interrupt descriptor table.
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*/
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typedef union idt_entry {
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trap_gate_t trap_gate;
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intr_gate_t intr_gate;
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task_gate_t task_gate;
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} idt_entry_t;
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typedef idt_entry_t idt_t;
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/*
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* Local descriptor table.
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*/
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typedef union ldt_entry {
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code_desc_t code;
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data_desc_t data;
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call_gate_t call_gate;
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task_gate_t task_gate;
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} ldt_entry_t;
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typedef ldt_entry_t ldt_t;
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