[apple/xnu.git] / osfmk / i386 / user_ldt.h

/*
 * Copyright (c) 2000-2008 Apple 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@
 */
/*
 * @OSF_COPYRIGHT@
 */
/* 
 * Mach Operating System
 * Copyright (c) 1991 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.
 */

/*
 */

#ifndef	_I386_USER_LDT_H_
#define	_I386_USER_LDT_H_

/*
 * User LDT management.
 *
 * Each task may have its own LDT.
 */

#define	LDT_AUTO_ALLOC	0xffffffff

#ifdef KERNEL
#include <i386/seg.h>

struct user_ldt {
	unsigned int start;		/* first descriptor in table */
	unsigned int count;		/* how many descriptors in table */
	struct real_descriptor	ldt[0];	/* descriptor table (variable) */
};
typedef struct user_ldt *	user_ldt_t;

extern user_ldt_t	user_ldt_copy(
			user_ldt_t	uldt);
extern void	user_ldt_free(
			user_ldt_t	uldt);
extern void	user_ldt_set(
			thread_t	thread);
#else /* !KERNEL */
#include <sys/cdefs.h>

union ldt_entry;

__BEGIN_DECLS
int i386_get_ldt(int, union ldt_entry *, int);
int i386_set_ldt(int, const union ldt_entry *, int);
__END_DECLS
#endif /* KERNEL */

#endif	/* _I386_USER_LDT_H_ */
Commit	Line	Data
1c79356b	1	/*
b0d623f7	2	* Copyright (c) 2000-2008 Apple Inc. All rights reserved.
1c79356b	3	*
2d21ac55	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
2d21ac55 A	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.
8f6c56a5	14	*
2d21ac55 A	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
8f6c56a5 A	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
2d21ac55 A	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.
8f6c56a5	25	*
2d21ac55	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	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	*
0c530ab8	66	* Each task may have its own LDT.
1c79356b A	67	*/
1c79356b A	68
0c530ab8 A	69	#define LDT_AUTO_ALLOC 0xffffffff
	70
	71	#ifdef KERNEL
1c79356b A	72	#include <i386/seg.h>
	73
	74	struct user_ldt {
0c530ab8 A	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) */
1c79356b A	78	};
	79	typedef struct user_ldt * user_ldt_t;
	80
0c530ab8 A	81	extern user_ldt_t user_ldt_copy(
0c530ab8 A	82	user_ldt_t uldt);
1c79356b	83	extern void user_ldt_free(
91447636	84	user_ldt_t uldt);
0c530ab8 A	85	extern void user_ldt_set(
	86	thread_t thread);
	87	#else /* !KERNEL */
	88	#include <sys/cdefs.h>
	89
	90	union ldt_entry;
	91
	92	__BEGIN_DECLS
	93	int i386_get_ldt(int, union ldt_entry *, int);
	94	int i386_set_ldt(int, const union ldt_entry *, int);
	95	__END_DECLS
	96	#endif /* KERNEL */
1c79356b A	97
1c79356b A	98	#endif /* _I386_USER_LDT_H_ */