How to probe external modules?

[Wei Li]

How can I probe an external module, please? The ko is not stripped. But
reference to it with "module("xxx")" triggered:

        Pass 1: parsed user script and 25 library script(s) in 120usr/40sys/170real ms.
        semantic error: cannot find module mymodule debuginfo: No such file or directory
        semantic error: no match for probe point
        while: resolving probe point module("mymodule").function("myfunc").return
        Pass 2: analyzed script: 0 probe(s), 0 function(s), 0 global(s) in 10usr/50sys/51real ms.
        Pass 2: analysis failed.  Try again with more '-v' (verbose) options.

My systemtap comes with RHEL 4.4:

        [root@localhost ~]# stap -V
        SystemTap translator/driver (version 0.5.8 built 2006-07-14)
        (Using Red Hat elfutils 0.121 libraries.)
        Copyright (C) 2005-2006 Red Hat, Inc. and others
        This is free software; see the source for copying conditions.

-- 
Wei Li <wei_li@acm.org>