Cheat Engine

[fraserofsmeg]

So I'm trying to play around with a lua file that's being loaded by a game. I've tried to the best of my ability to find the lua_gettop using CE, but no luck. There's a way around this though, I have access to all the lua files, and I can modify them *before* I run the game.

However, when I run the game with modified lua files it doesn't load! There must be some code that checks if the lua files are as expected (same length, same hash, etc. - I don't know). I have found 3 string references to the files:

1. Error message about trying to load the files
2. & 3. just a reference to the files themselves.

I assume I need to do something to skip either #2 or #3 however I have to do this before I run the code as this seems the be one of the first things the game checks. If I search for the addresses of 2 or 3 when opening the file (File -> Open file) then it just takes me to a load of question marks (??).

Is there any way in cheat engine to load a process with command line arguments, instantly break the process, then go about editing the code? If not, can anyone see a better way to do what I'm trying to do.


FYI - my plan to edit the code is to direct one of #2 or #3 to the original file and the other to my edited version, hopefully allowing the code to check the file is correct but then load my edited version. If more information is required about any of this please just ask! Here's the lua references I've found thus far in case anyone can see an easy way to edit a lua script in situ:

luaJIT 2.0.4
LUA script 01B2134
LUA_CPATH 0145A80C
LUA_NOENV 0145A7AC
LUA_PATH 0145A7E0

[atom0s]

If the game does not externally import Lua and reference its exports to make calls etc. then you wont generally find lua_gettop. Along with that, your strings show that the game uses LuaJit instead of normal Lua which is a heavily modded version of Lua.

If the library is statically linked, then its usually not going to have a function for gettop. Instead, it will be inlined when compiled due to optimization.

Rather than hook / look for gettop, focus on a different Lua call instead to get what you need.