minix/lib/nbsd_libc/arch/hppa/gen/swapcontext.S

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/* $NetBSD: swapcontext.S,v 1.4 2008/04/28 20:22:56 martin Exp $ */
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Klaus Klein.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "SYS.h"
#include <machine/mcontext.h>
#if defined(SYSLIBC_SCCS) && !defined(lint)
RCSID("$NetBSD: swapcontext.S,v 1.4 2008/04/28 20:22:56 martin Exp $")
#endif /* SYSLIBC_SCCS && !lint */
LEAF_ENTRY(swapcontext)
stw %rp, HPPA_FRAME_CRP(%sp)
stw %arg0, HPPA_FRAME_ARG(0)(%sp)
stw %arg1, HPPA_FRAME_ARG(1)(%sp)
SYSCALL(getcontext)
ldw HPPA_FRAME_ARG(0)(%sp), %arg1
ldw HPPA_FRAME_ARG(1)(%sp), %arg0
stw %r0, (_OFFSETOF_UC_GREGS + _REG_RET0 * SZREG)(%arg1)
ldo 4(%rp), %r1
stw %r1, (_OFFSETOF_UC_GREGS + _REG_PCOQT * SZREG)(%arg1)
stw %rp, (_OFFSETOF_UC_GREGS + _REG_PCOQH * SZREG)(%arg1)
SYSCALL(setcontext)
EXIT(swapcontext)
.end