Cheat Engine

Dave_Scream · Cheater Reputation: 0 Joined: 06 Dec 2009 Posts: 36

Hi,
I found some target code, but it used for many other values too. I need to make backtrace like described here http://www.szemelyesintegracio.hu/cheats/41-game-hacking-articles/225-basic-encryptions-debugging-backtracing-and-some-info-on-the-stack

so I need to set breakpoint with stopcondition.
How to setup stopcondition for example to stop and trace only if EAX==071BEDE0 ??

my value accessed by a command:
add eax,04

so to find the parent function, that make this call, I need to set "Break and Trace instructions" on this "add eax,04" command in debugger.

but i need to see trace not for all situations, but only when eax==071BEDE0 - it address of my value.

so im tryed to setup stopcondition eax==071BEDE0 or even impossible eax<0 - and get fault... trace appear.

how to setup stopcondition?

Geri · Moderator Reputation: 111 Joined: 05 Feb 2010 Posts: 5627

EAX == 0x071BEDE0

Dave_Scream · Cheater Reputation: 0 Joined: 06 Dec 2009 Posts: 36

Geri · Moderator Reputation: 111 Joined: 05 Feb 2010 Posts: 5627

You need to set the condition before the program would reach the breakpoint, otherwise it will surely not work.

Dave_Scream · Cheater Reputation: 0 Joined: 06 Dec 2009 Posts: 36

Geri · Moderator Reputation: 111 Joined: 05 Feb 2010 Posts: 5627

You are changing the stop condition for the tracing. This means that when the condition will be true, the tracing will stop.

You need to change the breakpoint condition.
Set break and trace on the code, then when it is green already, right-click on the code and use the "Set/Change" break condition. It doesn't hurt to pause the game or something until you set the condition.