Cheat Engine

gir489 · Posted: Sun Jun 23, 2019 12:33 pm Post subject: Feature request: NOP multiplier

When dealing with code caves, it's often hard for the developer to assign proper padding after the JMP to line up the assembly viewer with what it was before.

However, while I was reading an Intel assembler's handbook, I found that there's several instructions that are multibyte wide, that consume a similar operation as NOP. Generally, we don't even care about the efficiency cycles of these instructions, because it's just a spacer between the JMP to codecave, and the label of where the JMP RETURN needs to happen.

I have found someone has already documented up to 11 bytes of instructions that do absolutely nothing, and Cheat Engine seems to parse these fairly well. I suggest that instead of just generating something like 5 NOP instructions, it does something like:

FreeER · Posted: Sun Jun 23, 2019 1:41 pm Post subject:

I just glanced at it but it looks like the bytes/instructions used change... probably a lot simpler to just write nops, and if you happen to need a lot you can use lua to generate it

Dark Byte · Posted: Sun Jun 23, 2019 3:13 pm Post subject:

that is already in next CE, assuming your CPU supports multibyte NOP's ce will use it (of course not for the script template as there can be cpu's without that support)

gir489 · Posted: Sun Jun 23, 2019 5:20 pm Post subject:

Dark Byte · Posted: Sun Jun 23, 2019 11:18 pm Post subject:

There are still users on cpu's older than 8 year old that use CE and not all AMD systems back then did not support multibyte (It's also not sse3 it's a separate feature )

and freeer there's also 'align 0c 90'

gir489 · Posted: Wed Jul 17, 2019 5:33 pm Post subject: