1*e415d488SLionel Sambuc/* $NetBSD: swapcontext.S,v 1.5 2012/09/12 02:00:52 manu Exp $ */ 22fe8fb19SBen Gras 32fe8fb19SBen Gras/*- 42fe8fb19SBen Gras * Copyright (c) 2001 The NetBSD Foundation, Inc. 52fe8fb19SBen Gras * All rights reserved. 62fe8fb19SBen Gras * 72fe8fb19SBen Gras * This code is derived from software contributed to The NetBSD Foundation 82fe8fb19SBen Gras * by Klaus Klein. 92fe8fb19SBen Gras * 102fe8fb19SBen Gras * Redistribution and use in source and binary forms, with or without 112fe8fb19SBen Gras * modification, are permitted provided that the following conditions 122fe8fb19SBen Gras * are met: 132fe8fb19SBen Gras * 1. Redistributions of source code must retain the above copyright 142fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer. 152fe8fb19SBen Gras * 2. Redistributions in binary form must reproduce the above copyright 162fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer in the 172fe8fb19SBen Gras * documentation and/or other materials provided with the distribution. 182fe8fb19SBen Gras * 192fe8fb19SBen Gras * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 202fe8fb19SBen Gras * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 212fe8fb19SBen Gras * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 222fe8fb19SBen Gras * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 232fe8fb19SBen Gras * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 242fe8fb19SBen Gras * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 252fe8fb19SBen Gras * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 262fe8fb19SBen Gras * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 272fe8fb19SBen Gras * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 282fe8fb19SBen Gras * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 292fe8fb19SBen Gras * POSSIBILITY OF SUCH DAMAGE. 302fe8fb19SBen Gras */ 312fe8fb19SBen Gras 322fe8fb19SBen Gras#include "SYS.h" 332fe8fb19SBen Gras#include "assym.h" 342fe8fb19SBen Gras 352fe8fb19SBen Gras#if defined(SYSLIBC_SCCS) && !defined(lint) 36*e415d488SLionel Sambuc RCSID("$NetBSD: swapcontext.S,v 1.5 2012/09/12 02:00:52 manu Exp $") 372fe8fb19SBen Gras#endif /* SYSLIBC_SCCS && !lint */ 382fe8fb19SBen Gras 392fe8fb19SBen Gras .set reorder 402fe8fb19SBen Gras 412fe8fb19SBen GrasNESTED(swapcontext, CALLFRAME_SIZ, ra) 422fe8fb19SBen Gras .mask 0x80000030, (CALLFRAME_RA - CALLFRAME_SIZ) 432fe8fb19SBen Gras PTR_SUBU sp, sp, CALLFRAME_SIZ 442fe8fb19SBen Gras PTR_S ra, CALLFRAME_RA(sp) # save ra 452fe8fb19SBen Gras PTR_S a0, 0(sp) # stash away oucp 462fe8fb19SBen Gras PTR_S a1, SZREG(sp) # stash away ucp 472fe8fb19SBen Gras SYSTRAP(getcontext) 482fe8fb19SBen Gras PTR_L ra, CALLFRAME_RA(sp) 492fe8fb19SBen Gras bne a3, zero, 1f 502fe8fb19SBen Gras 512fe8fb19SBen Gras PTR_L v1, 0(sp) # load oucp again for adjustment 522fe8fb19SBen Gras PTR_L a0, SZREG(sp) # load ucp 532fe8fb19SBen Gras PTR_ADDIU v0, sp, CALLFRAME_SIZ 542fe8fb19SBen Gras REG_PROLOGUE 552fe8fb19SBen Gras REG_S zero, _OFFSETOF_UC_GREGS_V0(v1) 562fe8fb19SBen Gras REG_S ra, _OFFSETOF_UC_GREGS_EPC(v1) 572fe8fb19SBen Gras REG_S v0, _OFFSETOF_UC_GREGS_SP(v1) 582fe8fb19SBen Gras REG_EPILOGUE 592fe8fb19SBen Gras 60*e415d488SLionel Sambuc PIC_TAILCALL(setcontext) 612fe8fb19SBen Gras /* NOTREACHED */ 622fe8fb19SBen Gras1: 632fe8fb19SBen Gras PTR_ADDU sp, sp, CALLFRAME_SIZ 642fe8fb19SBen Gras SETUP_GPX(t0); 652fe8fb19SBen Gras SETUP_GP64(t3,swapcontext); 662fe8fb19SBen Gras PIC_TAILCALL(__cerror) 672fe8fb19SBen GrasEND(swapcontext) 68