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__sigtramp2.S revision 1.3 
      1 /*	$NetBSD: __sigtramp2.S,v 1.3 2009/12/14 01:07:42 matt 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 #include "assym.h"
     34 
     35 #if defined(SYSLIBC_SCCS) && !defined(lint)
     36 	RCSID("$NetBSD: __sigtramp2.S,v 1.3 2009/12/14 01:07:42 matt Exp $")
     37 #endif /* SYSLIBC_SCCS and not lint */
     38 
     39 
     40 /*
     41  * The MIPS signal trampoline is invoked only to return from
     42  * the signal; the kernel calls the signal handler directly.
     43  *
     44  * On entry, stack looks like:
     45  *
     46  *	sp			->	siginfo_t structure
     47  *	sp + SIGINFO_SIZE	->	ucontext_t structure
     48  */
     49 LEAF_NOPROFILE(__sigtramp_siginfo_2)
     50 	PTR_ADDU	a0, sp, SIGINFO_SIZE	/* address of ucontext */
     51 	SYSTRAP(setcontext)			/* and do setcontext */
     52 	move		a0, v0			/* exit with errno */
     53 	SYSTRAP(exit)				/* if sigreturn fails */
     54 END(__sigtramp_siginfo_2)
     55