1*84d9c625SLionel Sambuc/* $NetBSD: getcontext.S,v 1.10 2013/09/03 00:30:19 matt 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" 33*84d9c625SLionel Sambuc#include "assym.h" 342fe8fb19SBen Gras 352fe8fb19SBen Gras#if defined(SYSLIBC_SCCS) && !defined(lint) 36*84d9c625SLionel Sambuc RCSID("$NetBSD: getcontext.S,v 1.10 2013/09/03 00:30:19 matt Exp $") 372fe8fb19SBen Gras#endif /* SYSLIBC_SCCS && !lint */ 382fe8fb19SBen Gras 392fe8fb19SBen Gras#ifdef WEAK_ALIAS 402fe8fb19SBen GrasWEAK_ALIAS(getcontext, _getcontext) 412fe8fb19SBen Gras#endif 422fe8fb19SBen Gras 432fe8fb19SBen GrasENTRY(_getcontext) 442fe8fb19SBen Gras mov r2, r0 /* Must save argument pointer. */ 452fe8fb19SBen Gras SYSTRAP (getcontext) 46*84d9c625SLionel Sambuc _INVOKE_CERROR() 47*84d9c625SLionel Sambuc#if !defined(__thumb__) || defined(_ARM_ARCH_T2) 48*84d9c625SLionel Sambuc str lr, [r2, #_UC_REGS_PC] /* Adjust PC. */ 49*84d9c625SLionel Sambuc#else 50*84d9c625SLionel Sambuc mov r3, lr 51*84d9c625SLionel Sambuc str r3, [r2, #_UC_REGS_PC] /* Adjust PC. */ 52*84d9c625SLionel Sambuc#endif 532fe8fb19SBen Gras#ifdef SOFTFLOAT 542fe8fb19SBen Gras /* Ahem. */ 552fe8fb19SBen Gras /* Judging from the softfloat code we should at least save 562fe8fb19SBen Gras the exception codes and rounding mode here. */ 572fe8fb19SBen Gras#endif 58*84d9c625SLionel Sambuc movs r0, #0 59*84d9c625SLionel Sambuc str r0, [r2, #_UC_REGS_R0] /* Return 0. */ 602fe8fb19SBen Gras RET 61*84d9c625SLionel SambucEND(_getcontext) 62