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      1 /*	$NetBSD: compat___sigtramp1.S,v 1.3 2014/05/23 02:34:33 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 Jason R. Thorpe.
      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  *		sigcontext structure			[12]
     41  *		pointer to sigcontext structure		[8]
     42  *		signal specific code			[4]
     43  *	sp->	signal number				[0]
     44  */
     45 NENTRY(__sigtramp_sigcontext_1)
     46 	leal	12(%esp),%eax	/* get pointer to sigcontext */
     47 	movl	%eax,4(%esp)	/* put it in the argument slot */
     48 				/* fake return address already there */
     49 	SYSTRAP(compat_16___sigreturn14) /* do sigreturn */
     50 	movl	%eax,4(%esp)	/* error code */
     51 	SYSTRAP(exit)		/* exit */
     52 END(__sigtramp_sigcontext_1)
     53