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rezlind
How do I cheat?
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Joined: 17 May 2024
Posts: 4
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 Posted: Fri May 17, 2024 1:45 pm Post subject: Failure determining what ... means |
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I am trying to execute auto assembler script and getting the error:
"Failure determining what registerValue means "
CheatEngine version is 7.5
Auto Assember code:
| Code: |
[ENABLE]
// Allocate memory for storing the register value
alloc(registerValue, 8)
// Save the RAX register value to the allocated memory
mov [registerValue], rax
// Execute Lua script to print the value
{$lua}
local registerValueAddress = getAddress('registerValue')
local value = readQword(registerValueAddress)
print(string.format("The value of the RAX register is: 0x%X", value))
{$asm}
// Continue with assembly code
label(afterLua)
afterLua:
[DISABLE]
// Deallocate the memory when the script is disabled
dealloc(registerValue)
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ParkourPenguin
I post too much
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Joined: 06 Jul 2014
Posts: 4706
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| Posted: Fri May 17, 2024 3:06 pm Post subject: |
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That's not how AA scripts work.
AA scrips assemble code to a specified address.
| Code: | game.exe+1234:
mov eax,[rbx] |
This assembles the instruction `mov eax,[rbx]` to machine code (bytes) and writes those bytes into memory at the address `game.exe+1234`.
AA scripts usually just assemble code and write it to a certain address. They aren't responsible for running the code they assemble- it's assumed the game will run it when it's suppose to.
As such, a freestanding instruction that's not being written to a certain address has no meaning.
Try the CE tutorial for help understanding the basics of code injection. There are plenty of video tutorials if you're stuck.
Also, {$lua} blocks are run before the script is executed. If you want the game to invoke some Lua code in CE, use {$luacode}:
https://forum.cheatengine.org/viewtopic.php?t=618134
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I don't know where I'm going, but I'll figure it out when I get there. |
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rezlind
How do I cheat?
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Joined: 17 May 2024
Posts: 4
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| Posted: Fri May 17, 2024 5:38 pm Post subject: |
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| That was a slightly simplified example. I am trying to inject code using AOB Injection template. I want the game (after injection is made) to execute lua script that will print the contents of a register, I am pushing all the registers to the stack before {$luacode} section and restoring them after it and before it jumps to the orignal game code. I wonder if that is possible?
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ParkourPenguin
I post too much
Reputation: 152
Joined: 06 Jul 2014
Posts: 4706
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| Posted: Fri May 17, 2024 6:36 pm Post subject: |
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"Slightly" is an understatement.
When something isn't working and you don't know what's wrong, please post the full script. You don't know if what you omitted/changed is part of the problem. Ideally it should be an SSCCE.
The only thing you should edit is the name of the game. e.g. replace "OnlineMultiplayerGame.exe" with "game.exe"
Pushing/popping registers yourself isn't necessary to use {$luacode}. Just do the same thing as the example in the post I linked to.
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rezlind
How do I cheat?
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Joined: 17 May 2024
Posts: 4
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| Posted: Sat May 18, 2024 1:06 pm Post subject: |
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I tried assigning to current cheat table this AOB injection:
| Code: |
[ENABLE]
aobscanmodule(INJECT,game.exe,48 8B 47 18 48 8B BC 24 A0 00 00 00) // should be unique
alloc(newmem,$1000,INJECT)
label(code)
label(return)
label(afterlua)
newmem:
code:
{$luacode itemId=eax}
printf("itemId=%d",itemId)
{$asm}
afterlua:
mov rax,[rdi+18]
mov rdi,[rsp+000000A0]
jmp return
INJECT:
jmp newmem
nop 7
return:
registersymbol(INJECT)
[DISABLE]
INJECT:
db 48 8B 47 18 48 8B BC 24 A0 00 00 00
unregistersymbol(INJECT)
dealloc(newmem)
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I got an error: Error in line 0 (call CELUA_ExecuteFunctionByReference) :This instruction can't be compiled
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ParkourPenguin
I post too much
Reputation: 152
Joined: 06 Jul 2014
Posts: 4706
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| Posted: Sat May 18, 2024 2:10 pm Post subject: |
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| Dark Byte wrote: | As for the lua error, that's just the syntax check. The syntaxcheck does not inject dll's into the target process, so call CELUA_ExecuteFunctionByReference will fail as the dll can't be found yet. But doing an actual run should be fine
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https://forum.cheatengine.org/viewtopic.php?p=5773449#5773449
When CE asks you if you want to edit it to this anyway select "Yes"
If you haven't assigned it to the cheat table yet, comment out everything between {$luacode} and {$asm} inclusive, assign it to the cheat table, edit the script in the address list, and uncomment it
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rezlind
How do I cheat?
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Joined: 17 May 2024
Posts: 4
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| Posted: Sat May 18, 2024 2:31 pm Post subject: |
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| Thank you! That worked.
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