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Merge the nathanw_sa branch.

This commit is contained in:
thorpej 2003-01-20 00:26:39 +00:00
parent 21375ddf92
commit c7e237f26a
1 changed files with 65 additions and 0 deletions
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lib/libc/arch/sh3/gen/swapcontext.S Normal file
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/* $NetBSD: swapcontext.S,v 1.2 2003/01/20 00:26:39 thorpej 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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 <machine/asm.h>
#if defined(SYSLIBC_SCCS) && !defined(lint)
RCSID("$NetBSD: swapcontext.S,v 1.2 2003/01/20 00:26:39 thorpej Exp $")
#endif /* SYSLIBC_SCCS and not lint */
ENTRY(swapcontext)
mov.l r5, @-r15
sts.l pr, @-r15
mov.l _L._getcontext, r0
jsr @r0
mov.l r4, @-r15
mov.l @r15+, r1
tst r0, r0
bf 1f
mov.l @r15, r0
mov.l r0, @(36 + 1 * 4, r1) /* saved pc <- pr */
mov.l _L.setcontext, r2
jsr @r2
mov.l @(4, r15), r4
1:
lds.l @r15+, pr
rts
add #4, r15
.align 2
_L._getcontext: .long _C_LABEL(_getcontext)
_L.setcontext: .long _C_LABEL(setcontext)