1/* 2 * Copyright (c) 2000-2008 Apple 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 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#ifndef _I386_USER_LDT_H_ 61#define _I386_USER_LDT_H_ 62 63/* 64 * User LDT management. 65 * 66 * Each task may have its own LDT. 67 */ 68 69#define LDT_AUTO_ALLOC 0xffffffff 70 71#ifdef KERNEL 72#include <i386/seg.h> 73 74struct user_ldt { 75 unsigned int start; /* first descriptor in table */ 76 unsigned int count; /* how many descriptors in table */ 77 struct real_descriptor ldt[0]; /* descriptor table (variable) */ 78}; 79typedef struct user_ldt * user_ldt_t; 80 81extern user_ldt_t user_ldt_copy( 82 user_ldt_t uldt); 83extern void user_ldt_free( 84 user_ldt_t uldt); 85extern void user_ldt_set( 86 thread_t thread); 87#else /* !KERNEL */ 88#include <sys/cdefs.h> 89 90union ldt_entry; 91 92__BEGIN_DECLS 93int i386_get_ldt(int, union ldt_entry *, int); 94int i386_set_ldt(int, const union ldt_entry *, int); 95__END_DECLS 96#endif /* KERNEL */ 97 98#endif /* _I386_USER_LDT_H_ */ 99