20 Jan
2005
20 Jan
'05
1:24 a.m.
Hartmut Birr wrote:
I think that some parts of your implementation are
incorrect. The
function must check for the location of the buffer and the previous
mode. If the previous mode is user mode, the buffer must be located
within the user address space. IMHO using of MmCopyFrom/ToCaller is
better than using an exception block. It is also true for your
following commits.
Yes, that's true. I've fixed them in the meanwhile doing it how MSDN
recommends, probing the buffers passed from user mode and then rely on
SEH. I know that SEH might not look as good as using
MmCopyFrom/ToCaller, but 3rd party drivers don't have this option as well...
Best Regards
Thomas