__sigtramp2.S revision 1.2 
11.2Suwe/*	$NetBSD: __sigtramp2.S,v 1.2 2006/01/06 04:38:10 uwe Exp $ */
21.1Suwe
31.1Suwe/*-
41.1Suwe * Copyright (c) 2003 The NetBSD Foundation, Inc.
51.1Suwe * All rights reserved.
61.1Suwe *
71.1Suwe * This code is derived from software contributed to The NetBSD Foundation
81.1Suwe * by Jason R. Thorpe.
91.1Suwe *
101.1Suwe * Redistribution and use in source and binary forms, with or without
111.1Suwe * modification, are permitted provided that the following conditions
121.1Suwe * are met:
131.1Suwe * 1. Redistributions of source code must retain the above copyright
141.1Suwe *    notice, this list of conditions and the following disclaimer.
151.1Suwe * 2. Redistributions in binary form must reproduce the above copyright
161.1Suwe *    notice, this list of conditions and the following disclaimer in the
171.1Suwe *    documentation and/or other materials provided with the distribution.
181.1Suwe * 3. All advertising materials mentioning features or use of this software
191.1Suwe *    must display the following acknowledgement:
201.1Suwe *	This product includes software developed by the NetBSD
211.1Suwe *	Foundation, Inc. and its contributors.
221.1Suwe * 4. Neither the name of The NetBSD Foundation nor the names of its
231.1Suwe *    contributors may be used to endorse or promote products derived
241.1Suwe *    from this software without specific prior written permission.
251.1Suwe *
261.1Suwe * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
271.1Suwe * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
281.1Suwe * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
291.1Suwe * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
301.1Suwe * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
311.1Suwe * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
321.1Suwe * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
331.1Suwe * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
341.1Suwe * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
351.1Suwe * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
361.1Suwe * POSSIBILITY OF SUCH DAMAGE.
371.1Suwe */
381.1Suwe
391.1Suwe#include "SYS.h"
401.1Suwe
411.1Suwe/*
421.1Suwe * The SH signal trampoline is invoked only to return from
431.1Suwe * the signal; the kernel calls the signal handler directly.
441.1Suwe *
451.1Suwe * On entry, stack looks like:
461.1Suwe *
471.1Suwe *		siginfo structure
481.1Suwe *	sp->	ucontext structure
491.1Suwe *
501.1Suwe * NB: This order is different from what other ports use (siginfo at
511.1Suwe * the top of the stack), because we want to avoid wasting two
521.1Suwe * instructions to skip to the ucontext.  Not that this order really
531.1Suwe * matters, but I think this inconsistency deserves an explanation.
541.1Suwe */
551.1SuweNENTRY(__sigtramp_siginfo_2)
561.1Suwe	mov	r15, r4			/* get pointer to ucontext */
571.1Suwe	SYSTRAP(setcontext)		/* and call setcontext() */
581.1Suwe	mov	r0, r4			/* exit with errno */
591.1Suwe	SYSTRAP(exit)			/* if sigreturn fails */
601.2Suwe
611.2Suwe	SET_ENTRY_SIZE(__sigtramp_siginfo_2)
62