1 files changed, 49 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/nios2/clone.c b/libc/sysdeps/linux/nios2/clone.c
new file mode 100644
index 000000000..0555658b4
--- /dev/null
+++ b/libc/sysdeps/linux/nios2/clone.c
@@ -0,0 +1,49 @@
+/*
+ * libc/sysdeps/linux/nios2/clone.c -- `clone' syscall for linux/nios2
+ *
+ *  Copyright (C) 2004,05  Microtronix Datacom Ltd
+ *  Copyright (C) 2002,03  NEC Electronics Corporation
+ *  Copyright (C) 2002,03  Miles Bader <miles@gnu.org>
+ *
+ * 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.
+ *
+ * Written by Miles Bader <miles@gnu.org>
+ * Nios2 port by Wentao Xu
+ */
+
+#include <errno.h>
+#include <sys/syscall.h>
+
+int clone (int (*fn)(void *arg), void *child_stack, int flags, void *arg)
+{
+  register unsigned long rval asm ("r2") = -EINVAL;
+
+  if (fn && child_stack) {
+      register unsigned long syscall asm ("r3");
+      register unsigned long arg0 asm ("r4");
+      register unsigned long arg1 asm ("r5");
+
+      /* Clone this thread.  */
+      rval = TRAP_ID_SYSCALL;
+      syscall = __NR_clone;
+      arg0 = flags;
+      arg1 = (unsigned long)child_stack;
+      asm volatile ("trap "
+         : "=r" (rval), "=r" (syscall)
+         : "0" (rval),"1" (syscall), "r" (arg0), "r" (arg1)
+         );
+
+      if (rval == 0) {
+         /* In child thread, call fn and exit.  */
+         arg0 = (*fn) (arg);
+         syscall = __NR_exit;
+         asm volatile ("trap "
+          : "=r" (rval), "=r" (syscall)
+          : "1" (syscall), "r" (arg0));
+      }
+   }
+
+  __syscall_return (int, rval);
+}