libgloss: bfin: add a better default _exit

libgloss/bfin/_exit.c

@@ -0,0 +1,25 @@
+/*
+ * C library support files for the Blackfin processor
+ *
+ * Copyright (C) 2012 Analog Devices, Inc.
+ *
+ * The authors hereby grant permission to use, copy, modify, distribute,
+ * and license this software and its documentation for any purpose, provided
+ * that existing copyright notices are retained in all copies and that this
+ * notice is included verbatim in any distributions. No written agreement,
+ * license, or royalty fee is required for any of the authorized uses.
+ * Modifications to this software may be copyrighted by their authors
+ * and need not follow the licensing terms described here, provided that
+ * the new terms are clearly indicated on the first page of each file where
+ * they apply.
+ */
+
+#include <_ansi.h>
+
+_VOID
+_DEFUN (_exit, (rc),
+	int rc)
+{
+  while (1)
+    asm volatile ("EXCPT 0;");
+}