kallsyms_lookup_name

[Venkatram Tummala]

On Mon, Aug 8, 2011 at 11:21 AM, Abu Rasheda <rcpilot2010 at gmail.com> wrote:

>  - grep kallsyms_lookup from /proc/kallsyms (it is there on SL 5.5 and SL
>>> 6.0. You can edit your program and assign something like:
>>>
>>> int (*my_kallsyms_lookup_name)(const char *name) = (void *) KALLSYMS;
>>>
>>> where KALLSYMS is address found above, or your loading script can feed
>>> this address.
>>>
>>
>> This is what i am currently doing but i need a cleaner way of doing this.
>>
>
> Sometime, this is only thing you have, and this is pretty clean. You can
> write a script, which could pass module parameter for the address of the
> function.
>
>
>> if your kernel is compiled with kprobe, you can use it to get address too.
>>>
>>
>> How do i do it using kprobes? To register a kprobe, i need the address of
>> kallsyms_lookup_name which is what i want in the first place.
>>
>
>  I think following should work.
>
> struct kprobe kp;
>
> memset(&kp, 0, sizeof(kp));
> kp.symbol_name = "kallsyms_lookup_name";
> if (!register_kprobe(&kp))
>    {
>     my_kallsyms_lookup_name = (void *) kp.addr;
>     unregister_kprobe(&kp);
>   }
>

Thanks. This is what i needed. Worked like a charm.!
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