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/* $OpenBSD: rfork_thread.S,v 1.2 2011/10/17 06:39:20 guenther 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/m68k/SYS.h"
/*
* int __tfork_thread(const struct __tfork *param, void *stack, void (*func)(void *), void *arg);
*/
ENTRY(__tfork_thread)
/*
* Set up the new thread's stack.
*/
movl sp@(8), a0 /* stack */
movl sp@(16), a0@- /* arg */
movl sp@(12), a1 /* func */
/*
* We did not create a frame, so the stack is ready for an immediate
* system call invocation.
*/
__DO_SYSCALL(__tfork)
jcs 9f
tstl d0
jeq 1f
/*
* parent process: just return.
*/
rts
1:
/*
* child process: switch stacks, invoke function, then exit.
*/
movl a0, sp /* stack with arg pushed on it */
jsr a1@ /* func */
addq #4, sp
__DO_SYSCALL(threxit)
9:
/*
* system call failure.
*/
jra __cerror
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