1/*
2 * Copyright (c) 2002 Jonathan Mini <mini@freebsd.org>.
3 * Copyright (c) 2001 Daniel Eischen <deischen@freebsd.org>.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Neither the name of the author nor the names of its contributors
12 *    may be used to endorse or promote products derived from this software
13 *    without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY DANIEL EISCHEN AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <machine/asm.h>
29__FBSDID("$FreeBSD$");
30
31
32/*
33 * _i386_enter_uts(struct kse_mailbox *km, kse_func_t uts, void *stack,
34 *     long stacksz);
35 * +4 = km, +8 = uts, +12 = stack, +16 = size
36 */
37ENTRY(_i386_enter_uts)
38	movl	%esp, %edx		/* save stack */
39	movl	12(%edx), %eax		/* get bottom of stack */
40	addl	16(%edx), %eax		/* add length */
41	movl	%eax, %esp		/* switch to uts stack */
42	pushl	4(%edx)			/* push the address of the mailbox */
43	call	*8(%edx)
44	ret
45