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/*
* Copyright (C) 2004 Atmel Corporation
*
* This file is subject to the terms and conditions of the GNU Lesser General
* Public License. See the file "COPYING.LIB" in the main directory of this
* archive for more details.
*/
#include <errno.h>
#include <sys/syscall.h>
#include <unistd.h>
/*
* I don't know if we can be absolutely certain that the fn and arg
* parameters are preserved when returning as the child. If the
* compiler stores them in registers (r0-r7), they should be.
*/
int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg)
{
register int (*_fn)(void *arg) = fn;
register void *_arg = arg;
int err;
/* Sanity check the arguments */
err = -EINVAL;
if (!fn)
goto syscall_error;
if (!child_stack)
goto syscall_error;
err = INLINE_SYSCALL(clone, 2, flags, child_stack);
if (err < 0)
goto syscall_error;
else if (err != 0)
return err;
_exit(_fn(_arg));
syscall_error:
__set_errno (-err);
return -1;
}
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