i386_set_ldt.c

来自「基于组件方式开发操作系统的OSKIT源代码」· C语言 代码 · 共 56 行

/*
 *  Copyright (c) 1993 John Brezak
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 *	$Id: i386_set_ldt.c,v 1.5 1997/02/22 14:59:32 peter Exp $
 */

#if defined(LIBC_RCS) && !defined(lint)
static const char rcsid[] = "$Id: i386_set_ldt.c,v 1.5 1997/02/22 14:59:32 peter Exp $";
#endif /* LIBC_RCS and not lint */

#include <sys/cdefs.h>
#include <machine/segments.h>
#include <machine/sysarch.h>

struct parms {
        int			start;
        union descriptor	*descs;
        int			num;
};

int
i386_set_ldt(int start, union descriptor *descs, int num)
{
        struct parms p;

        p.start = start;
        p.descs = descs;
        p.num   = num;

	return sysarch(I386_SET_LDT, (char *)&p);
}