swapcontext.S revision 1.2
11.2Sthorpej/* $NetBSD: swapcontext.S,v 1.2 2003/01/18 11:10:44 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#include <machine/mcontext.h> 411.2Sthorpej 421.2Sthorpej#if defined(SYSLIBC_SCCS) && !defined(lint) 431.2Sthorpej ASMSTR("$NetBSD: swapcontext.S,v 1.2 2003/01/18 11:10:44 thorpej Exp $") 441.2Sthorpej#endif /* SYSLIBC_SCCS && !lint */ 451.2Sthorpej 461.2Sthorpej#ifdef __ABICALLS__ 471.2Sthorpej .abicalls 481.2Sthorpej#endif 491.2Sthorpej .set reorder 501.2Sthorpej 511.2SthorpejNESTED(swapcontext, CALLFRAME_SIZ, ra) 521.2Sthorpej .mask 0x80000030, (CALLFRAME_RA - CALLFRAME_SIZ) 531.2Sthorpej subu sp, sp, CALLFRAME_SIZ 541.2Sthorpej sw ra, CALLFRAME_RA(sp) # save ra 551.2Sthorpej sw a0, 0(sp) # stash away oucp 561.2Sthorpej sw a1, 4(sp) # stash away ucp 571.2Sthorpej SYSTRAP(getcontext) 581.2Sthorpej lw ra, CALLFRAME_RA(sp) 591.2Sthorpej bne a3, zero, 1f 601.2Sthorpej 611.2Sthorpej lw v1, 0(sp) # load oucp again for adjustment 621.2Sthorpej lw a0, 4(sp) # load ucp 631.2Sthorpej addiu v0, sp, CALLFRAME_SIZ 641.2Sthorpej REG_PROLOGUE 651.2Sthorpej REG_S zero, (_OFFSETOF_UC_GREGS + _REG_V0 * SZREG)(v1) 661.2Sthorpej REG_S ra, (_OFFSETOF_UC_GREGS + _REG_EPC * SZREG)(v1) 671.2Sthorpej REG_S v0, (_OFFSETOF_UC_GREGS + _REG_SP * SZREG)(v1) 681.2Sthorpej REG_EPILOGUE 691.2Sthorpej 701.2Sthorpej SYSTRAP(setcontext) 711.2Sthorpej /* NOTREACHED */ 721.2Sthorpej1: 731.2Sthorpej addiu sp, sp, CALLFRAME_SIZ 741.2Sthorpej la t9, _C_LABEL(__cerror) 751.2Sthorpej jr t9 761.2SthorpejEND(swapcontext) 77