Cheat Engine

linhlan981

Hello, i try to make a random critical damage script, and come up with this.

originalcode:
call rand
and eax,#7
cmp eax,0
jne normal

imul esi,#5
sub ecx,esi
mov [rsp+30],ecx
jmp returnhere

normal:
sub ecx,esi
mov [rsp+30],ecx
jmp returnhere

i want to have 12.5% change to deal 500% damage, but any codes below the call rand is not working, but when i remove the call rand, i have 100% chance to crit 500%. Please help me, thank you.

Dark Byte · Posted: Tue Aug 30, 2022 5:56 am Post subject:

Try adding a sub rsp,20 before call rand, and add rsp,20 after.

or

linhlan981 · Posted: Tue Aug 30, 2022 6:33 am Post subject:

Dark Byte · Posted: Tue Aug 30, 2022 6:37 am Post subject:

you may want to save all registers before calling rand

These registers may have changed by calling rand:
RAX, RCX, RDX, R8,R9,R10, R11
( according to https://docs.microsoft.com/en-us/cpp/build/x64-software-conventions?view=msvc-170 )

and of course,

linhlan981 · Posted: Tue Aug 30, 2022 6:53 am Post subject:

Dark Byte · Posted: Tue Aug 30, 2022 7:42 am Post subject:

the ccode block you can just put in place of call rand (if you're on ce 7.4)

e.g:

linhlan981 · Posted: Tue Aug 30, 2022 1:07 pm Post subject:

Dark Byte · Posted: Tue Aug 30, 2022 2:59 pm Post subject:

{$ccode}/{$asm} and {$luacode}/{$asm} are blocks that pretty much do all the setup of the stack and parameters for you.
Then inside the blocks you can write c code($ccode), or luacode($luacode) and reference the optional registers as variables you've provided

The difference between luacode and ccode, (besides the language used) is that luacode runs inside CE's context and waits till it returns from CE, and ccode runs inside the target itself with no wait