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getcontext.S revision 1.4 
      1  1.4  martin /*	$NetBSD: getcontext.S,v 1.4 2008/04/28 20:22:56 martin Exp $	*/
      2  1.1    matt 
      3  1.1    matt /*-
      4  1.1    matt  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  1.1    matt  * All rights reserved.
      6  1.1    matt  *
      7  1.1    matt  * This code is derived from software contributed to The NetBSD Foundation
      8  1.1    matt  * by Matt Fredette.
      9  1.1    matt  *
     10  1.1    matt  * Redistribution and use in source and binary forms, with or without
     11  1.1    matt  * modification, are permitted provided that the following conditions
     12  1.1    matt  * are met:
     13  1.1    matt  * 1. Redistributions of source code must retain the above copyright
     14  1.1    matt  *    notice, this list of conditions and the following disclaimer.
     15  1.1    matt  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.1    matt  *    notice, this list of conditions and the following disclaimer in the
     17  1.1    matt  *    documentation and/or other materials provided with the distribution.
     18  1.1    matt  *
     19  1.1    matt  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  1.1    matt  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  1.1    matt  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  1.1    matt  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  1.1    matt  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  1.1    matt  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  1.1    matt  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  1.1    matt  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  1.1    matt  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  1.1    matt  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  1.1    matt  * POSSIBILITY OF SUCH DAMAGE.
     30  1.1    matt  */
     31  1.1    matt 
     32  1.1    matt #include <sys/errno.h>
     33  1.3     chs #include <machine/mcontext.h>
     34  1.1    matt #include "SYS.h"
     35  1.1    matt 
     36  1.3     chs #ifdef WEAK_ALIAS
     37  1.3     chs WEAK_ALIAS(getcontext, _getcontext)
     38  1.3     chs #endif
     39  1.1    matt 
     40  1.3     chs #define _OFFSETOF_UC_GREGS (10 * 4)
     41  1.3     chs #define SZREG 4
     42  1.3     chs 
     43  1.3     chs ENTRY(_getcontext, 0)
     44  1.3     chs 	SYSCALL(getcontext)
     45  1.3     chs 	stw	%rp, (_OFFSETOF_UC_GREGS + _REG_PCOQH * SZREG)(%arg0)
     46  1.3     chs 	ldo	4(%rp), %r1
     47  1.3     chs 	stw	%r1, (_OFFSETOF_UC_GREGS + _REG_PCOQT * SZREG)(%arg0)
     48  1.3     chs 	bv	%r0(%rp)
     49  1.3     chs 	stw	%r0, (_OFFSETOF_UC_GREGS + _REG_RET0 * SZREG)(%arg0)
     50  1.3     chs EXIT(_getcontext)
     51