Cheat Engine

Noobrzor

Greetings

I am fooling around with x64 game, and as I used the template for code injection I found out this:

alloc(newmem,512,"gamedll_x64_rwdi.dll"+5E2119)

My research, aka finding Dark Byte's post, says it's because the jmp newmem can't jump such a long distance, and the third parameter in alloc is the region the memory will be allocated to.

But how does that work? I mean allocating memory adds in bytes at the end of the program, or so I figure, simply making it bigger, but since it's in an additional area there is no risk of any conflicts. But in a region, it means the memory is allocated somewhere in between bytes which correspond to opcodes, or how?

I mean, adding just one byte somewhere inside a functional procedure shifts the reading matrix of the entire game so it's a guaranteed instacrash. How is allocating memory in this manner, to a specific region, different?

Cheers!

Dark Byte · Posted: Thu Sep 17, 2015 7:18 am Post subject:

it doesn't allocate at that exact spot. ,it just picks an unallocated block of memory nearby the given address, and allocates the memory there (no shifting required)

STN · Posted: Thu Sep 17, 2015 2:03 pm Post subject:

http://forum.cheatengine.org/viewtopic.php?p=5615276

Noobrzor · Posted: Thu Sep 17, 2015 4:18 pm Post subject:

I thank you for answers.