swapcontext.S revision 1.4
11.4Srearnsha/* $NetBSD: swapcontext.S,v 1.4 2004/08/21 11:20:10 rearnsha Exp $ */ 21.2Sthorpej 31.2Sthorpej/*- 41.2Sthorpej * Copyright (c) 2001 The NetBSD Foundation, Inc. 51.2Sthorpej * All rights reserved. 61.2Sthorpej * 71.2Sthorpej * This code is derived from software contributed to The NetBSD Foundation 81.2Sthorpej * by Klaus Klein. 91.2Sthorpej * 101.2Sthorpej * Redistribution and use in source and binary forms, with or without 111.2Sthorpej * modification, are permitted provided that the following conditions 121.2Sthorpej * are met: 131.2Sthorpej * 1. Redistributions of source code must retain the above copyright 141.2Sthorpej * notice, this list of conditions and the following disclaimer. 151.2Sthorpej * 2. Redistributions in binary form must reproduce the above copyright 161.2Sthorpej * notice, this list of conditions and the following disclaimer in the 171.2Sthorpej * documentation and/or other materials provided with the distribution. 181.2Sthorpej * 3. All advertising materials mentioning features or use of this software 191.2Sthorpej * must display the following acknowledgement: 201.2Sthorpej * This product includes software developed by the NetBSD 211.2Sthorpej * Foundation, Inc. and its contributors. 221.2Sthorpej * 4. Neither the name of The NetBSD Foundation nor the names of its 231.2Sthorpej * contributors may be used to endorse or promote products derived 241.2Sthorpej * from this software without specific prior written permission. 251.2Sthorpej * 261.2Sthorpej * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 271.2Sthorpej * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 281.2Sthorpej * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 291.2Sthorpej * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 301.2Sthorpej * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 311.2Sthorpej * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 321.2Sthorpej * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 331.2Sthorpej * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 341.2Sthorpej * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 351.2Sthorpej * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 361.2Sthorpej * POSSIBILITY OF SUCH DAMAGE. 371.2Sthorpej */ 381.2Sthorpej 391.2Sthorpej#include "SYS.h" 401.2Sthorpej 411.2Sthorpej#if defined(LIBC_SCCS) && !defined(lint) 421.4Srearnsha RCSID("$NetBSD: swapcontext.S,v 1.4 2004/08/21 11:20:10 rearnsha Exp $") 431.2Sthorpej#endif /* LIBC_SCCS && !lint */ 441.2Sthorpej 451.2SthorpejENTRY(swapcontext) 461.2Sthorpej stmfd sp!, {r0-r1, lr} /* Must save oucp, ucp, lr. */ 471.2Sthorpej bl PIC_SYM(_C_LABEL(_getcontext), PLT) /* getcontext(oucp) */ 481.2Sthorpej cmp r0, #0 491.2Sthorpej ldmfd sp!, {r0-r1, lr} 501.4Srearnsha RETc(ne) 511.2Sthorpej str lr, [r0, #(36 + 15*4)] /* Adjust saved PC. */ 521.2Sthorpej#ifdef SOFTFLOAT 531.2Sthorpej /* Ahem. */ 541.2Sthorpej#endif 551.2Sthorpej mov r0, r1 561.2Sthorpej bl PIC_SYM(_C_LABEL(setcontext), PLT) 571.4Srearnsha RET 58