Developer Forum

how can I share the kernel mode memory in user mode and vice versa in a
video driver dll.
Do I need to create the memory using any particular function or so ???

Kernel mode memory is not accessible from usermode.

You could use memory mapped files, to "share memory". Memory mapping a file can be done in a user mode application or in the kernel using the ZwCreateSection, ZwMapViewOfSection, and MmMapViewInSystemSpace operations. Subsequent access to the file contents are done using this memory mapped data region; when data must be fetched from the file it is done so.

More on this in the Platform SDK and the DDK.

/christoph

I tried this but seems driver doesn't load in these cases ... I believe for
a video driver( a dll ) this is not permitted.



file can be done in a user mode application or in the kernel using the
ZwCreateSection, ZwMapViewOfSection, and MmMapViewInSystemSpace operations.
Subsequent access to the file contents are done using this memory mapped
data region; when data must be fetched from the file it is done so.