Cheat Engine

[Alphasoldier]

So I decided to take a wild step into 64 bit games, managed to find several functions that I could use, so I wrote my own code for it which worked just fine.
However, every time I disabled the script, the game would crash.
It took me some time, but I found the reason.

The simple jmp that goes to my piece of code is more than twice as long than most 32 bit games.

[ParkourPenguin]

It's because there is no jmp rel64 instruction. What's being shown is a pseudoinstruction CE defined. The instruction being executed is actually a jmp r/m64 using rip-relative addressing with a displacement of 0 (hence the dword 0), and the 64-bit address being jumped to is stored in the next qword after that instruction.

If you don't like that, make sure the address being jumped to is within a signed rel32 displacement of the injection point so CE can assemble a jmp rel32 instruction instead. Passing an address as the third argument to alloc will make CE allocate memory near that address (CE should automatically fill this in for you if you selected a standard template).