BOUNCE rtl@rtlinux.org: Approval required: Non-member submissionfrom [Linus Gasser <ineiti@gmx.net>] (fwd)

[Der Herr Hofrat <der.herr@hofr.at>]

>From owner-rtl Thu May 31 07:27:27 2001
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From: Linus Gasser <ineiti@gmx.net>
To: rtl@fsmlabs.com
Subject: Debugging a driver
Date: Thu, 31 May 2001 15:15:52 +0200
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Hi,
I have a rtl-module here that acts as a driver, but with the need for 
real-time (in fact it's a DAC for a software radio). Now and then the module 
goes 'whoops' and takes the whole computer with, sometimes there's 'just' an 
exception. In both cases I'm stuck and have to reboot the computer (either 
with the reset-knob or with a 'reboot'). I tried to get the rtl_debug module 
working, but it doesn't drop in the driver-module. I tried the following:

- Adding breakpoint() in one of the driver's routines
- modprobe rtl_debug
- insmod daq_module.o
- start the application that uses the driver (and calls the routine with the 
breakpoint() in it)
-> 
kernel: Unable to handle kernel paging request at virtual address dc3daa60 
kernel:  printing eip: 
kernel: d08d10bb 
kernel: *pde = 00000000 
kernel: Oops: 0000 
kernel: CPU:    1

and no notification of the rtl_debug module whatsoever.
 Did someone already debug a rtl-kernel-driver, and if so, how?

Thanks for considering my mail,

Ineiti