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/*
* Copyright (C) 2017 Hangzhou C-SKY Microsystems co.,ltd.
*
* Licensed under the LGPL v2.1 or later, see the file COPYING.LIB
* in this tarball.
*/
#include <stdarg.h>
#include <sysdep.h>
#include <unistd.h>
extern long __syscall_error(int err_no);
extern int __csky_clone (
int flags,
void *child_stack,
pid_t *ptid,
pid_t *ctid,
void *tls);
int __clone(
int (*fn)(void *),
void *child_stack,
int flags,
void *arg, ...)
{
void *ptid;
void *tls;
void *ctid;
va_list al;
int err;
va_start(al, arg);
ptid = va_arg(al, void *);
tls = va_arg(al, void *);
ctid = va_arg(al, void *);
va_end(al);
err = EINVAL;
if (!fn)
goto err;
if (!child_stack)
goto err;
/* prepare fn&arg in child_stack */
child_stack = (void *)((unsigned int)child_stack - 8);
*(unsigned int *)child_stack = (unsigned int)fn;
*(unsigned int *)(child_stack + 4) = (unsigned int)arg;
return __csky_clone(flags, child_stack, ptid, ctid, tls);
err:
return __syscall_error(-err);
}
weak_alias(__clone, clone)
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