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