minix/lib/nbsd_libc/arch/i386/sys/getcontext.S

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/* $NetBSD: getcontext.S,v 1.3 2008/04/28 20:22:56 martin Exp $ */
/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Klaus Klein.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "SYS.h"
#if defined(SYSLIBC_SCCS) && !defined(lint)
RCSID("$NetBSD: getcontext.S,v 1.3 2008/04/28 20:22:56 martin Exp $")
#endif /* SYSLIBC_SCCS && !lint */
#ifdef WEAK_ALIAS
WEAK_ALIAS(getcontext, _getcontext)
#endif
_SYSCALL(_getcontext,getcontext)
movl 4(%esp),%ecx
movl 0(%esp),%edx
movl %edx,(36 + 14 * 4)(%ecx) /* Adjust saved %eip ... */
leal 4(%esp),%edx
movl %edx,(36 + 17 * 4)(%ecx) /* ... and %esp. */
movl $0,(36 + 11 * 4)(%ecx) /* Arrange for return of 0. */
xorl %eax,%eax
ret