Home | History | Annotate | Line # | Download | only in sys
getcontext.S revision 1.8 
      1  1.8     skrll /*	$NetBSD: getcontext.S,v 1.8 2013/04/30 19:42:56 skrll Exp $	*/
      2  1.2   thorpej 
      3  1.2   thorpej /*-
      4  1.2   thorpej  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  1.2   thorpej  * All rights reserved.
      6  1.2   thorpej  *
      7  1.2   thorpej  * This code is derived from software contributed to The NetBSD Foundation
      8  1.2   thorpej  * by Klaus Klein.
      9  1.2   thorpej  *
     10  1.2   thorpej  * Redistribution and use in source and binary forms, with or without
     11  1.2   thorpej  * modification, are permitted provided that the following conditions
     12  1.2   thorpej  * are met:
     13  1.2   thorpej  * 1. Redistributions of source code must retain the above copyright
     14  1.2   thorpej  *    notice, this list of conditions and the following disclaimer.
     15  1.2   thorpej  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.2   thorpej  *    notice, this list of conditions and the following disclaimer in the
     17  1.2   thorpej  *    documentation and/or other materials provided with the distribution.
     18  1.2   thorpej  *
     19  1.2   thorpej  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  1.2   thorpej  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  1.2   thorpej  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  1.2   thorpej  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  1.2   thorpej  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  1.2   thorpej  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  1.2   thorpej  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  1.2   thorpej  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  1.2   thorpej  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  1.2   thorpej  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  1.2   thorpej  * POSSIBILITY OF SUCH DAMAGE.
     30  1.2   thorpej  */
     31  1.2   thorpej 
     32  1.2   thorpej #include "SYS.h"
     33  1.8     skrll #include "assym.h"
     34  1.2   thorpej 
     35  1.2   thorpej #if defined(SYSLIBC_SCCS) && !defined(lint)
     36  1.8     skrll 	RCSID("$NetBSD: getcontext.S,v 1.8 2013/04/30 19:42:56 skrll Exp $")
     37  1.2   thorpej #endif /* SYSLIBC_SCCS && !lint */
     38  1.2   thorpej 
     39  1.2   thorpej #ifdef WEAK_ALIAS
     40  1.2   thorpej WEAK_ALIAS(getcontext, _getcontext)
     41  1.2   thorpej #endif
     42  1.2   thorpej 
     43  1.2   thorpej ENTRY(_getcontext)
     44  1.2   thorpej 	mov	r2, r0			/* Must save argument pointer. */
     45  1.5     chris 	SYSTRAP (getcontext)
     46  1.2   thorpej 	bcs	PIC_SYM(CERROR, PLT)
     47  1.7     skrll 	str	lr, [r2, #_UC_REGS_PC]	/* Adjust PC. */
     48  1.2   thorpej #ifdef SOFTFLOAT
     49  1.2   thorpej 	/* Ahem. */
     50  1.2   thorpej 	/* Judging from the softfloat code we should at least save
     51  1.2   thorpej 	   the exception codes and rounding mode here. */
     52  1.2   thorpej #endif
     53  1.2   thorpej 	mov	r0, #0
     54  1.7     skrll 	str	r0, [r2, #_UC_REGS_R0]	/* Return 0. */
     55  1.4  rearnsha 	RET
     56