On Wed, Feb 09, 2005 at 04:03:36PM -0800, Badari Pulavarty wrote:
> On Tue, 2005-02-08 at 21:07, Prasanna S Panchamukhi wrote:
[..]
> > >
> >
> > Error check and graceful exit can be done in the jprobe handler
> > module. In the jprobe network packet logging patch, error check
> > was taken care by using kallsyms_lookup_name() as shown below.
> >
> > nt->jp.kp.addr = (kprobe_opcode_t *)
> > kallsyms_lookup_name(nt->funcname);
> > if (nt->jp.kp.addr) {
> > printk("plant jprobe at %s (%p), handler addr %p\n",
> > nt->funcname, nt->jp.kp.addr, nt->jp.entry);
> > register_jprobe(&nt->jp);
> > } else {
> > printk("couldn't find %s to plant jprobe\n",
> > nt->funcname);
> > }.
> >
>
> I tried to do this earlier in my module, but I get
>
> # insmod myprobe.ko
> insmod: error inserting 'myprobe.ko': -1 Unknown symbol in module
> myprobe: Unknown symbol kallsyms_lookup_name
>
> How did you use it ? it looks like kallsyms_lookup_name()
> is not exported. Thats the reason why I was hardcoding addresses.
>
I checked the network packet logging patch, it also adds the
EXPORT_SYMBOL(kallsyms_lookup_name). :)
http://prdownloads.sourceforge.net/dprobes/plog.tar.gz?download
Maneesh
--
Maneesh Soni
Linux Technology Center,
IBM India Software Labs,
Bangalore, India
email: [EMAIL PROTECTED]
Phone: 91-80-25044990
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