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/* $OpenBSD: rfork_thread.S,v 1.1 2005/12/23 20:08:27 miod Exp $ */
/*
* Copyright (c) 2005, Miodrag Vallat
*
* 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 AUTHOR ``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 AUTHOR 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 "../../../libc/arch/m88k/SYS.h"
/*
* int rfork_thread(int flags, void *stack, void (*func)(void *), void *arg);
*/
ENTRY(rfork_thread)
or r6, r3, r0 /* save stack */
or r13, r0, __SYSCALLNAME(SYS_,rfork)
tb0 0, r0, 128 /* corrupts r2 and r3 in the child */
br __cerror
bcnd eq0, r2, 1f
/*
* In parent process: just return.
*/
jmp r1
1:
/*
* In child process: switch stack, invoke function, then exit.
*/
or r31, r6, r0 /* stack */
jsr.n r4 /* func */
or r2, r5, r0 /* arg */
or r13, r0, __SYSCALLNAME(SYS_,threxit)
tb0 0, r0, 128
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