diff --git a/tools/python/xen/util/auxbin.py b/tools/python/xen/util/auxbin.py
new file mode 100644
index 0000000000..b6ba6cff9f
--- /dev/null
+++ b/tools/python/xen/util/auxbin.py
@@ -0,0 +1,44 @@
+#============================================================================
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of version 2.1 of the GNU Lesser General Public
+# License as published by the Free Software Foundation.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#============================================================================
+# Copyright (C) 2005 XenSource Ltd
+#============================================================================
+
+
+LIB_BIN_32 = "/usr/lib/xen/bin"
+LIB_BIN_64 = "/usr/lib64/xen/bin"
+
+
+import os
+import os.path
+
+
+def execute(exe, args = None):
+    exepath = pathTo(exe)
+    a = [ exepath ]
+    if args:
+        a.extend(args)
+    os.execv(exepath, a)
+
+
+def pathTo(exe):
+    return os.path.join(path(), exe)
+
+
+def path():
+    machine = os.uname()[4]
+    if machine.find('64') != -1 and os.path.exists(LIB_BIN_64):
+        return LIB_BIN_64
+    else:
+        return LIB_BIN_32