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Re: Page Fault Handler Hijacking and Oops
I forgot that there's another message printed in Oops. It is the following:
Code: Bad EIP value
<0> Kernel Panic: Aiee, Killing Interrupt Handler!
In Interrupt handler - not syncing
Alle 22:59, mercoledì 3 agosto 2005, Vincenzo Mallozzi ha scritto:
> Hi all,
> in LKM I've implemented, I hijack the page fault handler with a function
that
> first scans a list created by me and then call the original page fault
> handler.
>
> Now, the problem is that when I scan this list from within functions
different
> from the one that hijack the page fault handler, all the elements of the
list
> are printed.
> But, when I try to scan this list from within the exception handler
hijacked,
> only the first three elements are printed and then an Oops message is
> printed.
>
> The Oops is something like this:
>
> Unable to handle NULL pointer dereference at virtual address 00000000.
>
> After this message the system crashes.
>
> I know these information are too generic, but it is impossible to attach the
> whole part of code I've implemented; it's too big.
> I want give you only an idea of the problem I've encountered, hoping that
> someone have just encountered a problem like this in his programming-life.
> Can anyone suggest me?
>
> Thanks.
> Vincenzo Mallozzi.
>
>
>
>
>
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