[apple/xnu.git] / osfmk / i386 / ldt.c

/*
 * 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@
 */
/*
 * @OSF_COPYRIGHT@
 */
/* 
 * 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.
 */
/*
 */

/*
 * "Local" descriptor table.  At the moment, all tasks use the
 * same LDT.
 */
#include <i386/seg.h>
#include <i386/pmap.h>
#include <mach/i386/vm_types.h>
#include <mach/i386/vm_param.h>


struct fake_descriptor	master_ldt[LDTSZ] __attribute__ ((aligned (4096))) = {
	[SEL_TO_INDEX(SYSENTER_CS)] {	/* kernel code (sysenter) */
		0,
	  0xfffff,
	  SZ_32|SZ_G,
	  ACC_P|ACC_PL_K|ACC_CODE_R
	},
	[SEL_TO_INDEX(SYSENTER_DS)] {	/* kernel data (sysenter) */
		0,
	  0xfffff,
	  SZ_32|SZ_G,
	  ACC_P|ACC_PL_K|ACC_DATA_W
	},
	[SEL_TO_INDEX(USER_CS)] {	/* user code segment */
		0,
	  0xfffff,
 	  SZ_32|SZ_G,
	  ACC_P|ACC_PL_U|ACC_CODE_R
	},
	[SEL_TO_INDEX(USER_DS)] {	/* user data segment */
		0,
	  0xfffff,
	  SZ_32|SZ_G,
	  ACC_P|ACC_PL_U|ACC_DATA_W
	},
	[SEL_TO_INDEX(USER64_CS)] {	/* user 64-bit code segment */
		0,
		0xfffff,
		SZ_64|SZ_G,
		ACC_P|ACC_PL_U|ACC_CODE_R
	},
	[SEL_TO_INDEX(USER_CTHREAD)] {	/* user cthread segment */
		0,
	  0xfffff,
	  SZ_32|SZ_G,
	  ACC_P|ACC_PL_U|ACC_DATA_W
	},
};
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	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) 1991,1990 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	* "Local" descriptor table. At the moment, all tasks use the
	61	* same LDT.
	62	*/
	63	#include <i386/seg.h>
91447636	64	#include <i386/pmap.h>
1c79356b A	65	#include <mach/i386/vm_types.h>
	66	#include <mach/i386/vm_param.h>
	67
91447636	68
0c530ab8 A	69	struct fake_descriptor master_ldt[LDTSZ] __attribute__ ((aligned (4096))) = {
	70	[SEL_TO_INDEX(SYSENTER_CS)] { /* kernel code (sysenter) */
	71	0,
2d21ac55 A	72	0xfffff,
	73	SZ_32\|SZ_G,
	74	ACC_P\|ACC_PL_K\|ACC_CODE_R
0c530ab8 A	75	},
	76	[SEL_TO_INDEX(SYSENTER_DS)] { /* kernel data (sysenter) */
	77	0,
2d21ac55 A	78	0xfffff,
	79	SZ_32\|SZ_G,
	80	ACC_P\|ACC_PL_K\|ACC_DATA_W
0c530ab8 A	81	},
	82	[SEL_TO_INDEX(USER_CS)] { /* user code segment */
	83	0,
2d21ac55 A	84	0xfffff,
	85	SZ_32\|SZ_G,
	86	ACC_P\|ACC_PL_U\|ACC_CODE_R
0c530ab8 A	87	},
	88	[SEL_TO_INDEX(USER_DS)] { /* user data segment */
	89	0,
2d21ac55 A	90	0xfffff,
	91	SZ_32\|SZ_G,
	92	ACC_P\|ACC_PL_U\|ACC_DATA_W
0c530ab8 A	93	},
	94	[SEL_TO_INDEX(USER64_CS)] { /* user 64-bit code segment */
	95	0,
	96	0xfffff,
	97	SZ_64\|SZ_G,
	98	ACC_P\|ACC_PL_U\|ACC_CODE_R
	99	},
	100	[SEL_TO_INDEX(USER_CTHREAD)] { /* user cthread segment */
	101	0,
2d21ac55 A	102	0xfffff,
	103	SZ_32\|SZ_G,
	104	ACC_P\|ACC_PL_U\|ACC_DATA_W
0c530ab8	105	},
1c79356b	106	};