1/* $NetBSD: swapcontext.S,v 1.6 2014/02/19 13:01:51 skrll Exp $ */ 2 3/*- 4 * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Klaus Klein. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include "SYS.h" 33#include "assym.h" 34 35#include <machine/mcontext.h> 36 37#if defined(SYSLIBC_SCCS) && !defined(lint) 38 RCSID("$NetBSD: swapcontext.S,v 1.6 2014/02/19 13:01:51 skrll Exp $") 39#endif /* SYSLIBC_SCCS && !lint */ 40 41LEAF_ENTRY(swapcontext) 42 stw %rp, HPPA_FRAME_CRP(%sp) 43 stw %arg0, HPPA_FRAME_ARG(0)(%sp) 44 stw %arg1, HPPA_FRAME_ARG(1)(%sp) 45 SYSCALL(getcontext) 46 47 ldw HPPA_FRAME_ARG(0)(%sp), %arg1 48 ldw HPPA_FRAME_ARG(1)(%sp), %arg0 49 50 ldw HPPA_FRAME_CRP(%sp), %rp 51 ldo 4(%rp), %r1 52 stw %r1, (_OFFSETOF_UC_GREGS + _REG_PCOQT * SZREG)(%arg1) 53 stw %rp, (_OFFSETOF_UC_GREGS + _REG_PCOQH * SZREG)(%arg1) 54 bl setcontext, %rp 55 stw %r0, (_OFFSETOF_UC_GREGS + _REG_RET0 * SZREG)(%arg1) 56 57 ldw HPPA_FRAME_CRP(%sp), %rp 58 bv,n %r0(%rp) 59EXIT(swapcontext) 60 .end 61