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      1  1.4  uebayasi /*	$NetBSD: getcontext.S,v 1.4 2014/05/22 15:01:57 uebayasi Exp $	*/
      2  1.1      fvdl 
      3  1.1      fvdl /*
      4  1.1      fvdl  * Copyright (c) 2003 Wasabi Systems, Inc.
      5  1.1      fvdl  * All rights reserved.
      6  1.1      fvdl  *
      7  1.1      fvdl  * Written by Frank van der Linden for Wasabi Systems, Inc.
      8  1.1      fvdl  *
      9  1.1      fvdl  * Redistribution and use in source and binary forms, with or without
     10  1.1      fvdl  * modification, are permitted provided that the following conditions
     11  1.1      fvdl  * are met:
     12  1.1      fvdl  * 1. Redistributions of source code must retain the above copyright
     13  1.1      fvdl  *    notice, this list of conditions and the following disclaimer.
     14  1.1      fvdl  * 2. Redistributions in binary form must reproduce the above copyright
     15  1.1      fvdl  *    notice, this list of conditions and the following disclaimer in the
     16  1.1      fvdl  *    documentation and/or other materials provided with the distribution.
     17  1.1      fvdl  * 3. All advertising materials mentioning features or use of this software
     18  1.1      fvdl  *    must display the following acknowledgement:
     19  1.1      fvdl  *      This product includes software developed for the NetBSD Project by
     20  1.1      fvdl  *      Wasabi Systems, Inc.
     21  1.1      fvdl  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     22  1.1      fvdl  *    or promote products derived from this software without specific prior
     23  1.1      fvdl  *    written permission.
     24  1.1      fvdl  *
     25  1.1      fvdl  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
     26  1.1      fvdl  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  1.1      fvdl  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  1.1      fvdl  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
     29  1.1      fvdl  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  1.1      fvdl  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  1.1      fvdl  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  1.1      fvdl  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  1.1      fvdl  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  1.1      fvdl  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  1.1      fvdl  * POSSIBILITY OF SUCH DAMAGE.
     36  1.1      fvdl  */
     37  1.1      fvdl 
     38  1.1      fvdl 
     39  1.1      fvdl #include "SYS.h"
     40  1.1      fvdl 
     41  1.1      fvdl #if defined(SYSLIBC_SCCS) && !defined(lint)
     42  1.4  uebayasi 	RCSID("$NetBSD: getcontext.S,v 1.4 2014/05/22 15:01:57 uebayasi Exp $")
     43  1.1      fvdl #endif
     44  1.1      fvdl 
     45  1.1      fvdl #ifdef WEAK_ALIAS
     46  1.1      fvdl WEAK_ALIAS(getcontext, _getcontext)
     47  1.1      fvdl #endif
     48  1.1      fvdl 
     49  1.1      fvdl /*
     50  1.1      fvdl  * 56 == offsetof(ucontext_t, uc_mcontext)
     51  1.1      fvdl  * 14 == _REG_RAX
     52  1.1      fvdl  * 21 == _REG_RIP
     53  1.1      fvdl  * 24 == _REG_URSP
     54  1.1      fvdl  */
     55  1.1      fvdl 
     56  1.3  drochner _SYSCALL(_getcontext,getcontext)
     57  1.1      fvdl 	movq	(%rsp),%r11
     58  1.1      fvdl 	movq	%r11,(56 + 21 * 8)(%rdi)
     59  1.1      fvdl 	leaq	8(%rsp),%r11
     60  1.1      fvdl 	movq	%r11,(56 + 24 * 8)(%rdi)
     61  1.1      fvdl 	movq	$0,(56 + 14 * 8)(%rdi)
     62  1.1      fvdl 	xorl	%eax,%eax
     63  1.1      fvdl 	ret
     64  1.4  uebayasi END(_getcontext)
     65