So I can debug kernel code with KGDB now. No sweat.
I can also debug LKMs with KGDB using the special version of GDB, GDBMOD. Also no sweat.

Now I would like to debug a User-Space application that is designed to interact with the LKM that I am interested in. Does anyone know if GDB is capable of doing this?

My guess is that this is essentially like debugging two programs at once. Am I crazy, or is this right? I mean, there is no problem debugging an LKM because it is loaded into the kernel-space, so it's just like part of the kernel.

Thanks in advance!

You'd have to use KGDB for the kernel-space debugging, and GDB for the user space debugging. So, yeah, it's like debugging two programs, but each needs its own debugger. The only debugger I know that can handle both at once is proprietary -- the Arriba debugger from Viosoft, but I don't know how many architectures they support. The target mostly embedded systems, esp. MIPS.

-John

Wow, thanks for the tip. I've never even heard of this debugger.
I was doing some reading about it and there's a picture in this pdf file that highlights the exact "area" I am having problems debugging.

Once again, thanks for your help.

I would still appreciate any other input you guys have.
Thanks in advance!