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combining two AA scripts into one is failing

Cheat Engine Forum Index -> Cheat Engine Tutorials -> Auto Assembler tutorials

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sgsgwv$6263
Advanced Cheater

Reputation: 0

Joined: 05 Aug 2020
Posts: 82

Posted: Sun Dec 22, 2024 3:42 am Post subject: combining two AA scripts into one is failing

Hi cheat engineers, I am trying to combine two AA scripts into one, But the game crashes everytime I enable it. I have renamed labels correctly. But there is something else wrong. Below is my combined script:

Code:

{ Game : GTA5.exe
Version:
Date : 2024-12-22

This script does blah blah blah
}

[ENABLE]

aobscanmodule(fallVectorInject,GTA5.exe,0F 58 44 01 10 0F 29 44 01 10 48) // should be unique
aobscanmodule(PlayerSpeedInject,GTA5.exe,8B 48 08 89 4B 08 8B 40 0C 89 43 0C EB) // should be unique
alloc(newmemForFall,$1000,fallVectorInject)
alloc(newmem,$1000,"GTA5.exe"+8F1D8F)
alloc(PlayerRax,8)
alloc(Playerbase,8)
alloc(minH,4)
alloc(fallBase,4)
registerSymbol(fallBase)
registersymbol(PlayerRax)
registersymbol(Playerbase)
label(codeForFall)
label(returnForFall)

newmem:

sub rsp,20
movups [rsp],xmm0
movups [rsp+10],xmm1

movss xmm1,[rdi+280]
movss xmm0,[minH]
ucomiss xmm1,xmm0
jb code

cmp [rax],0
je code

mov [Playerbase],rdi
mov [PlayerRax],rax

code:
movups xmm1,[rsp+10]
movups xmm0,[rsp]
add rsp,20

mov ecx,[rax+08]
mov [rbx+08],ecx
jmp return

newmemForFall:

cmp r13,[PlayerRax]
jne codeForFall

mov [fallBase],r13
je codeForFall

codeForFall:
addps xmm0,[rcx+rax+10]
jmp returnForFall

fallVectorInject:
jmp newmemForFall
returnForFall:
registersymbol(fallVectorInject)

PlayerSpeedInject:
jmp newmem
nop
return:
registersymbol(PlayerSpeedInject)

minH:
dd (float)380

[DISABLE]

PlayerSpeedInject:
db 8B 48 08 89 4B 08

unregistersymbol(PlayerSpeedInject)
unregistersymbol(PlayerRax)
unregistersymbol(Playerbase)
dealloc(newmem)
dealloc(Playerbase)
dealloc(PlayerRax)
dealloc(minH)

fallVectorInject:
db 0F 58 44 01 10

unregistersymbol(fallVectorInject)
dealloc(newmemForFall)
dealloc(fallBase)
unregistersymbol(fallBase)

Please point out what I may be doing wrong. Thanks in advance.

ParkourPenguin
I post too much

Reputation: 148

Joined: 06 Jul 2014
Posts: 4593

Posted: Sun Dec 22, 2024 1:14 pm Post subject:

The comments at the bottom that show the code around the injection point are important.

sgsgwv$6263 wrote:

Code:

alloc(newmem,$1000,"GTA5.exe"+8F1D8F)

You should change the third argument to PlayerSpeedInject

sgsgwv$6263 wrote:

Code:

alloc(fallBase,4)
...
mov [fallBase],r13

r13 is an 8 byte register, but since fallBase is the last alloc, it probably shouldn't cause anything to crash. Change the alloc to 8 bytes anyway

sgsgwv$6263 wrote:

Code:

code:
...
return:

These symbols were never declared as labels. Maybe CE found an already existing symbol named "code" or "return" and used that instead of implicitly declaring it a label. Put label(code) and label(return) at the top with the other labels

sgsgwv$6263 wrote:

Code:

je codeForFall

codeForFall:

Remove that `je`. It does nothing

If it still crashes, check where/why it crashes by enabling Memory Viewer -> Debug -> Break on unexpected exceptions -> Always
If that doesn't work out, pause the process ("Advanced Options" window in bottom left of main CE window), enable the script, go to fallVectorInject and PlayerSpeedInject in the disassembler, set breakpoints at the `jmp` to your code injection, resume the process, and step through your code to see what happens and where it crashes.
_________________

I don't know where I'm going, but I'll figure it out when I get there.

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