1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_LINUX_LDT_H 27 #define _SYS_LINUX_LDT_H 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <sys/segments.h> 32 33 #ifdef __cplusplus 34 extern "C" { 35 #endif 36 37 struct ldt_info { 38 uint_t entry_number; 39 uint_t base_addr; 40 uint_t limit; 41 uint_t seg_32bit:1, 42 contents:2, 43 read_exec_only:1, 44 limit_in_pages:1, 45 seg_not_present:1, 46 useable:1; 47 }; 48 49 #define LDT_INFO_EMPTY(info) \ 50 ((info)->base_addr == 0 && (info)->limit == 0 && \ 51 (info)->contents == 0 && (info)->read_exec_only == 1 && \ 52 (info)->seg_32bit == 0 && (info)->limit_in_pages == 0 && \ 53 (info)->seg_not_present == 1 && (info)->useable == 0) 54 55 #if defined(__amd64) 56 #define SETMODE(desc) (desc)->usd_long = SDP_SHORT; 57 #else 58 #define SETMODE(desc) 59 #endif 60 61 #define LDT_INFO_TO_DESC(info, desc) { \ 62 USEGD_SETBASE(desc, (info)->base_addr); \ 63 USEGD_SETLIMIT(desc, (info)->limit); \ 64 (desc)->usd_type = ((info)->contents << 2) | \ 65 ((info)->read_exec_only ^ 1) << 1 | 0x10; \ 66 (desc)->usd_dpl = SEL_UPL; \ 67 (desc)->usd_p = (info)->seg_not_present ^ 1; \ 68 (desc)->usd_def32 = (info)->seg_32bit; \ 69 (desc)->usd_gran = (info)->limit_in_pages; \ 70 (desc)->usd_avl = (info)->useable; \ 71 SETMODE(desc); \ 72 } 73 74 #define DESC_TO_LDT_INFO(desc, info) { \ 75 bzero((info), sizeof (*(info))); \ 76 (info)->base_addr = USEGD_GETBASE(desc); \ 77 (info)->limit = USEGD_GETLIMIT(desc); \ 78 (info)->seg_not_present = (desc)->usd_p ^ 1; \ 79 (info)->contents = ((desc)->usd_type >> 2) & 3; \ 80 (info)->read_exec_only = (((desc)->usd_type >> 1) & 1) ^ 1; \ 81 (info)->seg_32bit = (desc)->usd_def32; \ 82 (info)->limit_in_pages = (desc)->usd_gran; \ 83 (info)->useable = (desc)->usd_avl; \ 84 } 85 86 extern void lx_set_gdt(int, user_desc_t *); 87 extern void lx_clear_gdt(int); 88 89 #ifdef __cplusplus 90 } 91 #endif 92 93 #endif /* _SYS_LINUX_LDT_H */