Defrag Tools: #27 - WinDbg - Configure Kernel Debugging

Nytro · February 13, 2013

[h=1]Defrag Tools: #27 - WinDbg - Configure Kernel Debugging[/h]

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High Quality WMV (PC, Xbox, MCE)

In this episode of Defrag Tools, Andrew Richards, Chad Beeder and Larry Larsen continue looking at the Debugging Tools for Windows (in particular WinDbg). WinDbg is a debugger that supports user mode debugging of a process, or kernel mode debugging of a computer.

This installment goes over the cables and configuration steps required to set up kernel mode debugging.

We use these BCDEdit commands:

bcdedit
bcdedit /dbgsettings
bcdedit /dbgsettings 1394 channel:42
bcdedit /dbgsettings net hostip:192.168.0.10 port:50000 key:a.b.c.d
bcdedit /debug on
bcdedit /debug off

In the debug session, we use these commands:

.crash
.dump /f
lm
!lmi
.reload /f
!drvobj
!drvobj <module> 2
bl
bc *
be <N>
bd <N>
bp <function>
bm <wildcard>
x <wildcard>
g

Make sure you watch Defrag Tools Episode #1 and Defrag Tools Episode #23 for instructions on how to get the Debugging Tools for Windows and how to set the required environment variables for symbol and source code resolution.

Resources:

NT Debugging Blog - How to Setup a Debug Crash Cart to Prevent Your Server from Flat Lining

USBView

USB3 Debugging Cable

- Note, you must use a USB3 A-A cable designed for debugging, otherwise it will fry your box!

Timeline:

[00:45] - Kernel Debugging Cables

[02:14] - USB 2.0

[04:13] - USB 3.0 - New in Windows 8/Windows RT

[05:30] - 1394 (Firewire)

[10:39] - Break

[11:38] - Driver Objects