51 lines
2 KiB
ArmAsm
51 lines
2 KiB
ArmAsm
|
/* $NetBSD: swapcontext.S,v 1.5 2008/04/28 20:22:55 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"
|
||
|
|
||
|
#if defined(LIBC_SCCS) && !defined(lint)
|
||
|
RCSID("$NetBSD: swapcontext.S,v 1.5 2008/04/28 20:22:55 martin Exp $")
|
||
|
#endif /* LIBC_SCCS && !lint */
|
||
|
|
||
|
ENTRY(swapcontext)
|
||
|
stmfd sp!, {r0-r1, lr} /* Must save oucp, ucp, lr. */
|
||
|
bl PIC_SYM(_C_LABEL(_getcontext), PLT) /* getcontext(oucp) */
|
||
|
cmp r0, #0
|
||
|
ldmfd sp!, {r0-r1, lr}
|
||
|
RETc(ne)
|
||
|
str lr, [r0, #(36 + 15*4)] /* Adjust saved PC. */
|
||
|
#ifdef SOFTFLOAT
|
||
|
/* Ahem. */
|
||
|
#endif
|
||
|
mov r0, r1
|
||
|
bl PIC_SYM(_C_LABEL(setcontext), PLT)
|
||
|
RET
|