1/* $NetBSD: getcontext.S,v 1.4 2014/05/23 02:34:19 uebayasi Exp $ */ 2 3/*- 4 * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Klaus Klein. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include "SYS.h" 33 34#if defined(SYSLIBC_SCCS) && !defined(lint) 35 RCSID("$NetBSD: getcontext.S,v 1.4 2014/05/23 02:34:19 uebayasi Exp $") 36#endif /* SYSLIBC_SCCS && !lint */ 37 38#ifdef WEAK_ALIAS 39WEAK_ALIAS(getcontext, _getcontext) 40#endif 41 42_SYSCALL(_getcontext,getcontext) 43 movl 4(%esp),%ecx 44 movl 0(%esp),%edx 45 movl %edx,(36 + 14 * 4)(%ecx) /* Adjust saved %eip ... */ 46 leal 4(%esp),%edx 47 movl %edx,(36 + 17 * 4)(%ecx) /* ... and %esp. */ 48 movl $0,(36 + 11 * 4)(%ecx) /* Arrange for return of 0. */ 49 xorl %eax,%eax 50 ret 51END(_getcontext) 52