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getcontext.S revision 1.4.20.2 
      1  1.4.20.2  martin /*	$NetBSD: getcontext.S,v 1.4.20.2 2015/02/04 22:42:04 martin 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  1.4.20.2  martin #include "assym.h"
     34       1.1    ross 
     35  1.4.20.2  martin #if defined(LIBC_SCCS) && !defined(lint)
     36  1.4.20.2  martin __RCSID("$NetBSD: getcontext.S,v 1.4.20.2 2015/02/04 22:42:04 martin Exp $")
     37  1.4.20.2  martin #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  1.4.20.1  martin 	_DOSYSCALL(getcontext)
     46       1.1    ross 	bso	1f
     47       1.1    ross 	mflr	%r4
     48  1.4.20.1  martin 	stptr	%r4,UC_GREGS_PC(%r5)		# saved pc <- lr
     49  1.4.20.1  martin 	stint	%r3,UC_GREGS_R3(%r5)		# arrange for return value 0
     50       1.1    ross 	blr
     51       1.1    ross 1:
     52  1.4.20.1  martin 	BRANCH_TO_CERROR()
     53  1.4.20.1  martin END(_getcontext)
     54