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getcontext.S revision 1.1.2.1 
      1 /*	$NetBSD: getcontext.S,v 1.1.2.1 2001/11/20 07:59:06 wdk Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Wayne Knowles
      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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include "SYS.h"
     40 
     41 #if defined(LIBC_SCCS) && !defined(lint)
     42 	ASMSTR("$NetBSD: getcontext.S,v 1.1.2.1 2001/11/20 07:59:06 wdk Exp $")
     43 #endif /* LIBC_SCCS && !lint */
     44 
     45 #ifdef WEAK_ALIAS
     46 WEAK_ALIAS(getcontext, _getcontext)
     47 #endif
     48 
     49 LEAF(_getcontext)
     50 	PIC_PROLOGUE(_getcontext, t9)
     51 	move	s7, a0
     52 	SYSTRAP(getcontext)
     53 	bne	a3, zero, 1f
     54 	sw	ra,   (40 + 31*4)(s7)	/* saved PC <- RA */
     55 	sw	zero, (40 +  2*4)(s7)	/* saved V0 <- 0 (Return 0) */
     56 	j	ra
     57 	nop
     58 1:
     59         PIC_CALL(__cerror,t9)
     60 END(getcontext)
     61