swapcontext.S revision 1.2
11.2Sthorpej/* $NetBSD: swapcontext.S,v 1.2 2003/01/18 11:04:40 thorpej 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 411.2SthorpejNESTED(swapcontext, 2, 24, ra, IM_RA|IM_A0|IM_A1, 0) 421.2Sthorpej LDGP(pv) 431.2Sthorpej lda sp, -24(sp) 441.2Sthorpej stq ra, (24- 8)(sp) /* must save ra, oucp, ucp */ 451.2Sthorpej stq a0, (24-16)(sp) 461.2Sthorpej stq a1, (24-24)(sp) 471.2Sthorpej CALL(_getcontext) /* getcontext(oucp) */ 481.2Sthorpej ldq t0, (24-16)(sp) 491.2Sthorpej bne v0, Lerr 501.2Sthorpej ldq t1, (24- 8)(sp) 511.2Sthorpej stq t1, (56 + 26 * 8)(t0) /* Adjust saved RA */ 521.2Sthorpej stq t1, (56 + 32 * 8)(t0) /* Adjust saved PC */ 531.2Sthorpej lda t1, 24(sp) 541.2Sthorpej stq t1, (56 + 30 * 8)(t0) /* Adjust saved SP */ 551.2Sthorpej 561.2Sthorpej ldq a0, (24-24)(sp) 571.2Sthorpej CALL(setcontext) /* setcontext(ucp) */ 581.2SthorpejLerr: 591.2Sthorpej ldq ra, (24- 8)(sp) 601.2Sthorpej lda sp, 24(sp) 611.2Sthorpej RET 621.2SthorpejEND(swapcontext) 63