Home | History | Annotate | Line # | Download | only in sys
getcontext.S revision 1.6.28.1 
      1  1.6.28.1       tls /*	$NetBSD: getcontext.S,v 1.6.28.1 2013/06/23 06:21:04 tls 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  1.6.28.1       tls #include "assym.h"
     34       1.2   thorpej 
     35       1.2   thorpej #if defined(SYSLIBC_SCCS) && !defined(lint)
     36  1.6.28.1       tls 	RCSID("$NetBSD: getcontext.S,v 1.6.28.1 2013/06/23 06:21:04 tls 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  1.6.28.1       tls 	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  1.6.28.1       tls 	str	r0, [r2, #_UC_REGS_R0]	/* Return 0. */
     55       1.4  rearnsha 	RET
     56