aze2cool
Tue Oct 16 06:04:00 PDT 2007
"Bajamani" wrote:
> On Oct 16, 8:41 am, aze2cool <aze2c...@discussions.microsoft.com>
> wrote:
> > Hi there,
> >
> > I just have finished up my filter driver writting on 32bit WinXP and Vista.
> > The next thing I am currently doing is porting this filter driver to 64 bit
> > OSes. I have this filter driver built with "Win XP 64 bit build Envirnoment"
> > and it ended up these drivers neither work on XP nor Vista.
> > From the registry, I can tell that the filter driver service has been loaded
> > up but I can't see any my debug message print out from my driver.
>
> from registry you cannot tell whether your filter is loaded. In your
> case it seems that the driver gets installed but it is not getting
> loaded.
I thought you can tell from the following registry key entry,
HKLM\System\CCS\Services\MyFilterDriver\Enum\xxx
where xxx is the index of the device. I might be wrong but this is how I
verify whether my filter service is up or not. Or is there any other way to
do that?
>
>
> > I have been searching on net and forums but nothing useful except this thing
> > called "Kernel-Mode Code Signing". I start to suspect that my filter driver
> > does not work mostly because of this so-called "code-signing policy". Does
> > anyone can tell me am I on the right track?
>
> on Vista 64 bit drivers need to be signed, on XP64 this is not a
> requirement. So if your facing same prob on XP64 then you can check
> whether something is going wrong in the DriverEntry.
>
Speaking of which, do I need to modify anything on DriverEntry when porting
to 64 bit XP/Vista? I have put some debug print message in DriverEntry
function but I don't see any of it and I would say my driver has never been
loaded up or skipped by the OS for some reason. That was why I kept thinking
it is the problem caused by "code-signing policy".
Does anyone out there has the same problem when trying to port existing 32
bit to 64 bit filter driver?
TIA.
Best Regards,
aze2cool
>
> > Many thanks in advance.
> >
> > Best Regards,
> > aze2cool
>
>
>
>