blob: 067fdc767f99ab52983eadb017bb579c2bd0910f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
/*
* libc/sysdeps/linux/bfin/clone.c -- `clone' syscall for linux/blackfin
*
* Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
#include <sched.h>
#include <errno.h>
#include <sys/syscall.h>
int
clone (int (*fn)(void *arg), void *child_stack, int flags, void *arg, ...)
{
long rval = -1;
if (fn && child_stack) {
__asm__ __volatile__ (
"excpt 0;" /* Call sys_clone */
"cc = r0 == 0;"
"if !cc jump 1f;" /* if (rval != 0) skip to parent */
"r0 = %4;"
"p0 = %5;"
"fp = 0;"
#ifdef __BFIN_FDPIC__
"p1 = [p0];"
"p3 = [p0 + 4];"
"call (p1);" /* Call cloned function */
#else
"call (p0);" /* Call cloned function */
#endif
"p0 = %6;"
"excpt 0;" /* Call sys_exit */
"1: nop;"
: "=q0" (rval)
: "qA" (__NR_clone), "q1" (child_stack), "q0" (flags), "a" (arg), "a" (fn), "i" (__NR_exit)
: "CC");
} else
__set_errno(EINVAL);
return rval;
}
|
