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getcontext.S revision 1.10 
      1  1.10      matt /*	$NetBSD: getcontext.S,v 1.10 2013/09/03 00:30:19 matt 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  1.10      matt 	RCSID("$NetBSD: getcontext.S,v 1.10 2013/09/03 00:30:19 matt 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  1.10      matt 	_INVOKE_CERROR()
     47  1.10      matt #if !defined(__thumb__) || defined(_ARM_ARCH_T2)
     48   1.7     skrll 	str	lr, [r2, #_UC_REGS_PC]	/* Adjust PC. */
     49  1.10      matt #else
     50  1.10      matt 	mov	r3, lr
     51  1.10      matt 	str	r3, [r2, #_UC_REGS_PC]	/* Adjust PC. */
     52  1.10      matt #endif
     53   1.2   thorpej #ifdef SOFTFLOAT
     54   1.2   thorpej 	/* Ahem. */
     55   1.2   thorpej 	/* Judging from the softfloat code we should at least save
     56   1.2   thorpej 	   the exception codes and rounding mode here. */
     57   1.2   thorpej #endif
     58  1.10      matt 	movs	r0, #0
     59   1.7     skrll 	str	r0, [r2, #_UC_REGS_R0]	/* Return 0. */
     60   1.4  rearnsha 	RET
     61  1.10      matt END(_getcontext)
     62