data address causing machine check exception

Wolfgang Denk wd at denx.de
Fri Sep 20 03:08:09 EST 2002


In message <1032445842.3d89df925ac65 at pop-mail.india.tejasnetworks.com> you wrote:
>
> In my driver module, there is an invalid memory access
> that causes a machine check exception.
...
> Since the exception is caused due to load/store related
> error, I was expecting the dar register to hold the Effective
> Address of the data, but I find zero.

Why don't you belive that, then? Maybe this _is_ the probem?
Somebody trying to dereferece NULL?


Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
It's a small world, but I wouldn't want to paint it.

** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/





More information about the Linuxppc-embedded mailing list