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getcontext.S revision 1.5 
      1  1.5  matt /*	$NetBSD: getcontext.S,v 1.5 2014/08/23 02:24:22 matt Exp $	*/
      2  1.1  ross 
      3  1.1  ross /*-
      4  1.1  ross  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  1.1  ross  * All rights reserved.
      6  1.1  ross  *
      7  1.1  ross  * This code is derived from software contributed to The NetBSD Foundation
      8  1.1  ross  * by Klaus Klein.
      9  1.1  ross  *
     10  1.1  ross  * Redistribution and use in source and binary forms, with or without
     11  1.1  ross  * modification, are permitted provided that the following conditions
     12  1.1  ross  * are met:
     13  1.1  ross  * 1. Redistributions of source code must retain the above copyright
     14  1.1  ross  *    notice, this list of conditions and the following disclaimer.
     15  1.1  ross  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.1  ross  *    notice, this list of conditions and the following disclaimer in the
     17  1.1  ross  *    documentation and/or other materials provided with the distribution.
     18  1.1  ross  *
     19  1.1  ross  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  1.1  ross  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  1.1  ross  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  1.1  ross  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  1.1  ross  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  1.1  ross  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  1.1  ross  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  1.1  ross  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  1.1  ross  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  1.1  ross  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  1.1  ross  * POSSIBILITY OF SUCH DAMAGE.
     30  1.1  ross  */
     31  1.1  ross 
     32  1.1  ross #include "SYS.h"
     33  1.5  matt #include "assym.h"
     34  1.1  ross 
     35  1.5  matt #if defined(LIBC_SCCS) && !defined(lint)
     36  1.5  matt __RCSID("$NetBSD: getcontext.S,v 1.5 2014/08/23 02:24:22 matt Exp $")
     37  1.5  matt #endif /* LIBC_SCCS && !lint */
     38  1.1  ross 
     39  1.1  ross #ifdef WEAK_ALIAS
     40  1.1  ross WEAK_ALIAS(getcontext, _getcontext)
     41  1.1  ross #endif
     42  1.1  ross 
     43  1.1  ross ENTRY(_getcontext)
     44  1.1  ross 	mr	%r5,%r3				# must save pointer
     45  1.5  matt 	_DOSYSCALL(getcontext)
     46  1.1  ross 	bso	1f
     47  1.1  ross 	mflr	%r4
     48  1.5  matt 	stptr	%r4,UC_GREGS_PC(%r5)		# saved pc <- lr
     49  1.5  matt 	stint	%r3,UC_GREGS_R3(%r5)		# arrange for return value 0
     50  1.1  ross 	blr
     51  1.1  ross 1:
     52  1.5  matt 	BRANCH_TO_CERROR()
     53  1.5  matt END(_getcontext)
     54