1/* $NetBSD: __sigtramp2.S,v 1.5 2014/05/23 02:34:19 uebayasi Exp $ */ 2 3/*- 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include "SYS.h" 33 34/* 35 * The i386 signal trampoline is invoked only to return from 36 * the signal; the kernel calls the signal handler directly. 37 * 38 * On entry, stack looks like: 39 * 40 * ucontext structure [12+sizeof(siginfo_t)] 41 * siginfo structure [12] 42 * pointer to ucontext structure [8] 43 * pointer to siginfo structure [4] 44 * sp-> signal number [0] 45 */ 46NENTRY(__sigtramp_siginfo_2) 47 leal 12+128(%esp),%eax /* get address of ucontext */ 48 movl %eax,4(%esp) /* put it in the argument slot */ 49 /* fake return address already there */ 50 SYSTRAP(setcontext) /* do setcontext */ 51 movl $-1,4(%esp) /* if we return here, something is wrong */ 52 SYSTRAP(exit) /* exit */ 53END(__sigtramp_siginfo_2) 54