Windows System Software -- Consulting, Training, Development -- Unique Expertise, Guaranteed Results

Before Posting...

Please check out the Community Guidelines in the Announcements and Administration Category.

More Info on Driver Writing and Debugging


The free OSR Learning Library has more than 50 articles on a wide variety of topics about writing and debugging device drivers and Minifilters. From introductory level to advanced. All the articles have been recently reviewed and updated, and are written using the clear and definitive style you've come to expect from OSR over the years.


Check out The OSR Learning Library at: https://www.osr.com/osr-learning-library/


!reg extension on 64bit VM (MS hyper-v), dumping registry key values

booboobaboobooba Member Posts: 1

Hi community!

I have a feeling that !reg extension works strange on my vm. So what I want is to get an immediate address of a key value. So I go through all the chores of !reg from getting KCB for the reg key, through dumping the kye hive etc, and eventually I get to the point where I have kvalue at hand:

` !reg valuelist 0xffff9782f04f6000 00000000028cf9ac

Dumping ValueList of Key <AeDebug> :

[Idx]   [ValAddr]       [ValueName]                   
[   0]  00000000028cfa04     UserDebuggerHotKey 
[   1]  00000000028cfa44     Debugger   
[   2]  00000000028cfad4     Auto   

 Use '!reg kvalue <ValAddr>' to dump the value

!reg kvalue 00000000028cfa44

Signature: CM_KEY_VALUE_SIGNATURE (kv)
Name      : Debugger {compressed}
DataLength: 6c
Data      : 28aea60  [cell index]
Type      : 1

!reg cellindex 0xffff9782f04f6000 28aea60

Map = ffff9782f0ff7000 Type = 0 Table = 14 Block = ae Offset = a60
MapTable     = ffff9782f108b000 
MapEntry     = ffff9782f108c050 
BinAddress = 00000000028cf001, BlockOffset = 0000000000000000
BlockAddress = 00000000028cf000 

pcell:  00000000028cfa64

`

Now, that pcell doesn't look like a legitimate address does it? Needless to say when I try dumping it i get question marks of uncommitted memory.

Has anybody been there too? What do I do wrong?

Thank you!

Sign In or Register to comment.

Howdy, Stranger!

It looks like you're new here. Sign in or register to get started.

Upcoming OSR Seminars
OSR has suspended in-person seminars due to the Covid-19 outbreak. But, don't miss your training! Attend via the internet instead!
Kernel Debugging 16-20 October 2023 Live, Online
Developing Minifilters 13-17 November 2023 Live, Online
Internals & Software Drivers 4-8 Dec 2023 Live, Online
Writing WDF Drivers 10-14 July 2023 Live, Online