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getcontext.S revision 1.1.30.1 
      1  1.1.30.1    yamt /*	$NetBSD: getcontext.S,v 1.1.30.1 2008/05/18 12:30:13 yamt Exp $	*/
      2       1.1  kleink 
      3       1.1  kleink /*-
      4       1.1  kleink  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5       1.1  kleink  * All rights reserved.
      6       1.1  kleink  *
      7       1.1  kleink  * This code is derived from software contributed to The NetBSD Foundation
      8       1.1  kleink  * by Klaus Klein.
      9       1.1  kleink  *
     10       1.1  kleink  * Redistribution and use in source and binary forms, with or without
     11       1.1  kleink  * modification, are permitted provided that the following conditions
     12       1.1  kleink  * are met:
     13       1.1  kleink  * 1. Redistributions of source code must retain the above copyright
     14       1.1  kleink  *    notice, this list of conditions and the following disclaimer.
     15       1.1  kleink  * 2. Redistributions in binary form must reproduce the above copyright
     16       1.1  kleink  *    notice, this list of conditions and the following disclaimer in the
     17       1.1  kleink  *    documentation and/or other materials provided with the distribution.
     18       1.1  kleink  *
     19       1.1  kleink  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20       1.1  kleink  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21       1.1  kleink  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22       1.1  kleink  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23       1.1  kleink  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24       1.1  kleink  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25       1.1  kleink  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26       1.1  kleink  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27       1.1  kleink  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28       1.1  kleink  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29       1.1  kleink  * POSSIBILITY OF SUCH DAMAGE.
     30       1.1  kleink  */
     31       1.1  kleink 
     32       1.1  kleink #include "SYS.h"
     33       1.1  kleink 
     34       1.1  kleink #if defined(SYSLIBC_SCCS) && !defined(lint)
     35  1.1.30.1    yamt 	RCSID("$NetBSD: getcontext.S,v 1.1.30.1 2008/05/18 12:30:13 yamt Exp $")
     36       1.1  kleink #endif /* SYSLIBC_SCCS && !lint */
     37       1.1  kleink 
     38       1.1  kleink #ifdef WEAK_ALIAS
     39       1.1  kleink WEAK_ALIAS(getcontext, _getcontext)
     40       1.1  kleink #endif
     41       1.1  kleink 
     42       1.1  kleink ENTRY(_getcontext)
     43       1.1  kleink 	mov	%o0, %o2			! must save pointer
     44       1.1  kleink 	mov	SYS_getcontext, %g1
     45       1.1  kleink 	t	ST_SYSCALL
     46       1.1  kleink 	bcc,a	1f
     47       1.1  kleink 	 clr	[%o2 + 40 + 11 * 4]		! gr[_REG_O0] = 0
     48       1.1  kleink 	ERROR()
     49       1.1  kleink 1:
     50       1.1  kleink 	add	%o7, 8, %o1
     51       1.1  kleink 	st	%o1, [%o2 + 40 + 1 * 4]		! gr[_REG_PC] = retaddr
     52       1.1  kleink 	add	%o7, 12, %o1
     53       1.1  kleink 	retl
     54       1.1  kleink 	 st	%o1, [%o2 + 40 + 2 * 4]		! gr[_REG_nPC] = retaddr + 4
     55