Initial checkin

1 files changed, 48 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/v850/clone.c b/libc/sysdeps/linux/v850/clone.c
new file mode 100644
index 000000000..33e96b449
--- /dev/null
+++ b/libc/sysdeps/linux/v850/clone.c
@@ -0,0 +1,48 @@
+/*
+ * libc/sysdeps/linux/v850/clone.c -- `clone' syscall for linux/v850
+ *
+ *  Copyright (C) 2002  NEC Electronics Corporation
+ *  Copyright (C) 2002  Miles Bader <miles@gnu.org>
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file COPYING in the main directory of this
+ * archive for more details.
+ *
+ * Written by Miles Bader <miles@gnu.org>
+ */
+
+#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 (SYSCALL_RET) = -EINVAL;
+
+  if (fn && child_stack)
+    {
+      register unsigned long syscall asm (SYSCALL_NUM);
+      register unsigned long arg0 asm (SYSCALL_ARG0);
+
+      /* Clone this thread.  */
+      arg0 = flags;
+      syscall = __NR_clone;
+      asm volatile ("trap " SYSCALL_SHORT_TRAP
+		    : "=r" (rval), "=r" (syscall)
+		    : "1" (syscall), "r" (arg0)
+		    : SYSCALL_SHORT_CLOBBERS);
+
+      if (rval == 0)
+	/* In child thread, call FN and exit.  */
+	{
+	  arg0 = (*fn) (arg);
+	  syscall = __NR_exit;
+	  asm volatile ("trap " SYSCALL_SHORT_TRAP
+			: "=r" (rval), "=r" (syscall)
+			: "1" (syscall), "r" (arg0)
+			: SYSCALL_SHORT_CLOBBERS);
+	}
+    }
+
+  __syscall_return (int, rval);
+}