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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright 2018 Joyent, Inc. All rights reserved.
*/
#ifndef _SYS_LINUX_LDT_H
#define _SYS_LINUX_LDT_H
#include <sys/segments.h>
#ifdef __cplusplus
extern "C" {
#endif
struct ldt_info {
uint_t entry_number;
uint_t base_addr;
uint_t limit;
uint_t seg_32bit:1,
contents:2,
read_exec_only:1,
limit_in_pages:1,
seg_not_present:1,
useable:1;
};
#define LDT_INFO_EMPTY(info) \
((info)->base_addr == 0 && (info)->limit == 0 && \
(info)->contents == 0 && (info)->read_exec_only == 1 && \
(info)->seg_32bit == 0 && (info)->limit_in_pages == 0 && \
(info)->seg_not_present == 1 && (info)->useable == 0)
#if defined(__amd64)
#define SETMODE(desc) (desc)->usd_long = SDP_SHORT;
#else
#define SETMODE(desc)
#endif
#define LDT_INFO_TO_DESC(info, desc) { \
USEGD_SETBASE(desc, (info)->base_addr); \
USEGD_SETLIMIT(desc, (info)->limit); \
(desc)->usd_type = ((info)->contents << 2) | \
((info)->read_exec_only ^ 1) << 1 | SDT_S | SDT_A; \
(desc)->usd_dpl = SEL_UPL; \
(desc)->usd_p = (info)->seg_not_present ^ 1; \
(desc)->usd_def32 = (info)->seg_32bit; \
(desc)->usd_gran = (info)->limit_in_pages; \
(desc)->usd_avl = (info)->useable; \
SETMODE(desc); \
}
#define DESC_TO_LDT_INFO(desc, info) { \
bzero((info), sizeof (*(info))); \
(info)->base_addr = USEGD_GETBASE(desc); \
(info)->limit = USEGD_GETLIMIT(desc); \
(info)->seg_not_present = (desc)->usd_p ^ 1; \
(info)->contents = ((desc)->usd_type >> 2) & 3; \
(info)->read_exec_only = (((desc)->usd_type >> 1) & 1) ^ 1; \
(info)->seg_32bit = (desc)->usd_def32; \
(info)->limit_in_pages = (desc)->usd_gran; \
(info)->useable = (desc)->usd_avl; \
}
#ifdef __cplusplus
}
#endif
#endif /* _SYS_LINUX_LDT_H */
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