Kernel Virtual Address

NTFSD
1

I have a physical address in a non-pagged pool (Common Buffer) how to get
the KernalVirtual address of this physical address???

If I can get the KernalVa of this physical address, I could be able to
copy
the data in that location using RtlCopyMemory.

Pls Help me in this regard.

Thanks in Advance.

Anand.

2

How did you get the physical address in the first place?

Given an arbitrary physical page, there’s no mechanism for finding if there
even IS a virtual address for the physical page (keep in mind, there is
nothing that requires you have a VA for every PA.) But it is also difficult
to construct programming scenarios where you would get a physical address
for a common buffer and not get the corresponding virtual address.

Regards,

Tony

Tony Mason
Consulting Partner
OSR Open Systems Resources, Inc.
http://www.osr.com

-----Original Message-----
From: Anand Kalyan [mailto:xxxxx@sstil.com]
Sent: Friday, May 09, 2003 3:11 AM
To: File Systems Developers
Subject: [ntfsd] Kernel Virtual Address

I have a physical address in a non-pagged pool (Common Buffer) how to get
the KernalVirtual address of this physical address???

If I can get the KernalVa of this physical address, I could be able to
copy
the data in that location using RtlCopyMemory.

Pls Help me in this regard.

Thanks in Advance.

Anand.

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