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Special Command—Unassembling code with u, ub and uf

When debugging sooner or later you will need to disassemble code to get a better understanding of that code. By disassembling the code, you get the mnemonics translated from the 0s and 1s that constitute the binary code. It is a low level view of the Read More...
Posted Thursday, November 05, 2009 9:27 PM by Roberto Farah | 2 Comments

Special Command—.if and j to Use in Breakpoints and Scripts

The .if and j commands are used conditionally to execute a command or series of commands. .if is very similar to if from C and C++: .if ( Condition ) { Commands } .elsif ( Condition ) { Commands } .else { Commands } j does the same thing, but uses a very Read More...
Posted Thursday, June 12, 2008 11:13 PM by Roberto Farah | 4 Comments

Special Command—Using Breakpoints: bp, bm, ba, bu

When doing live debugging you’ll use breakpoints at some point when tackling a problem. A simple breakpoint is easy to use ; however, when you are on the trenches you might need to use advanced breakpoints that save you a lot of manual work. For instance, Read More...
Posted Friday, May 02, 2008 12:24 AM by Roberto Farah | 2 Comments

Understanding "Magic" Pointers and Offsets

With this blog post I try to explain how "magic" pointers and offsets work. I just copied the term "magic" to refer to these kinds of pointers or offsets: dd poi(0x129514 + 0x18) + 0x8 L2 du poi(0x0007de95) du poi(poi(poi(0x129514 + 0x9c)) + 0x4) dd poi(0x129514 Read More...
Posted Tuesday, August 07, 2007 6:40 PM by Roberto Farah | 8 Comments

[Windbg Script] Tracing MessageBox calls

In the past I worked on a support case where I needed to find out if some MessageBox from a C++ application was displayed and, if positive, what the message was. I got inconsistent answers whenever I asked the user, so I didn’t know if the MessageBox Read More...
Posted Friday, April 27, 2007 2:24 AM by Roberto Farah | 0 Comments
 
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