Bcdedit Tips and Tricks For Debugging Part 1

re: Bcdedit Tips and Tricks For Debugging Part 1

matusalem — Tue, 02 Oct 2012 08:03:12 GMT

I'm trying to use bootdebug option for debugging windows 8 x64 bootmgfx.efi and got some error:

Opened \\.\pipe\kdebug

Waiting to reconnect...

Connected to Windows Boot Debugger 9200 x64 target at (Tue Oct 2 09:54:20.526 2012 (UTC + 2:00)), ptr64 TRUE

Kernel Debugger connection established.

Symbol search path is: srv*c:\symbols.pub*msdl.microsoft.com/.../symbols

Executable search path is:

CS descriptor lookup failed

Windows Boot Debugger Kernel Version 9200 UP Free x64

Machine Name:

Primary image base = 0x00000000`10000000 Loaded module list = 0x00000000`10183280

System Uptime: not available

Access violation - code c0000005 (first chance)

First chance exceptions are reported before any exception handling.

This exception may be expected and handled.

Unable to get program counter

0018:942f 0000 add byte ptr [bx+si],al

Code/stack segment value seem to be wrong and i can't single step althrough registers contains right values for RIP, RSP,...

But i successfully can debug winload.exe without any problems, i'm using last debugging tools for Win 8 x64.

re: Bcdedit Tips and Tricks For Debugging Part 1

TomC3 — Mon, 10 Sep 2012 16:19:23 GMT

just tried the settings above for enabling debug on hibernate in Windows 2012...no workee.....is there extra special secret sauce to enable debug on resume from hibernate?

[Thanks for the feedback. We will consider adding Windows 8 and Windows 2012 specific debug settings to a future article.]

re: Bcdedit Tips and Tricks For Debugging Part 1

cheong00 — Tue, 11 Oct 2011 01:51:05 GMT

Nice article.

And I wonder if there is list of GUIDs that represent objects configurable with bcdedit.

re: Bcdedit Tips and Tricks For Debugging Part 1

GoodOne — Fri, 07 Oct 2011 04:30:17 GMT

Very helpful. We mostly face issue while installtion phase. Can you also post something about how we can setup debugger in WINPE? It would be great help.

re: Bcdedit Tips and Tricks For Debugging Part 1

Miro — Fri, 23 Sep 2011 07:59:21 GMT

Thanks for this post, it may save me in the future. I would like to ask if you guys can write some detailed article(s) concerning checked builds of Windows (some real world examples, differences between free and checked builds from the debugging perspective etc.).

[Thank you for the feedback, and for the suggestion.]