Cheat Engine

[LongBeardedLion]

So im trying to set a breakpoint that breaks if the 2nd byte stored in the address in ebp is 03.

So lets say my address in EBP points to a value of 12 03 00 1C.

The 2nd byte is 03 so its true.

I asked this sometime ago and the answer at the time was:

readBytes([EBP+2], 1, false) == 3

But it does not break.

Also i saw that for x64dbg the expression is:

ReadByte,Byte,byte(addr)

But still i could not figure it out.

Pls help.

[Dark Byte]

readBytes(EBP+2,1)==3

[LongBeardedLion]

Thank you.

So what was that ",false" doing there?

Also what if its not the value inside the address, but the address itself.

For example if ECX == 12304050

And i need it to break if the 4th byte is 50 ^.

But not the byte written as a value inside the address. But the address itself.



Does the same apply to ESP?

Wont i need to use brackets ? [] For example:

[ESP+4]

I have an address 10204050 in ESP+4. And this 10204050 yet points to another value that is AA BB CC DD.

How do i make a breakpoint that detects that ESP + 4 has DD in the value inside its address?

[ParkourPenguin]

The third parameter determines if the bytes are returned in a table or just some value(s). Refer to celua.txt for documentation.

[LongBeardedLion]

Thank you so much. I wrote it down.

I had no way before to break the stack values.

Do you know where i can see more info about conditional breakpoints? More examples, and complex problems?

For x64dbg there is almost nothing online. So i will make everything that requires breakpoints on cheat engine.

[ParkourPenguin]

Conditional breakpoints are just Lua code. There are a few eccentricities involved (see celua.txt "debugging" section, particularly "debug variables" / "debug_getContext"), but it's mostly CE Lua. Learn Lua first (CE uses Lua 5.3), then learn the stuff CE adds to Lua by reading celua.txt.

[LongBeardedLion]

Thank you ParkourPenguin.

Im trying not to learn lua. Im trying to learn use c++, and practice it with this. So for example injections / calling functions etc i do all in c++.

Dont get me wrong. PErhaps im being ignorant. But i see no purpose in learning lua. I learned a few commands. And it seems a very simple and nice language to work with. But it has no other function. Afaik. I could be wrong. You tell me . I want to learn c++. So all the stuff that is supposed to be done in lua in cheat engine im doing in c++. Injections, calling functions, reading and writting to memory. I know it is harder but it is worthy it in the long run. And c++ is useful for everything as far as i was told.

Perhaps something is escaping me on lua. But from what i have seen its a language that is going a bit with less use as of late. But i can be wrong.

[ParkourPenguin]

I don't think you're wrong. The only reason I know Lua is because CE uses it. Other people do use it for stuff like games and other software, but it's uncommon.

I suggested you learn Lua because you asked how conditional breakpoints worked in CE. If you want to write your own debugger in C++, good luck.