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Disabling an assembly script?

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deama1234
Master Cheater

Reputation: 3

Joined: 20 Dec 2014
Posts: 328

Posted: Sun Jul 19, 2015 7:09 am Post subject: Disabling an assembly script?

So, I have my script where once it's enabled I save values onto custom memory allocations...

Code:

newmem:
cmp [save],00
je saves
jmp calculate
//=============================================================================
saves:
//save origins
fld [esi+20]
fstp [speed]

fld [esi+34]
fstp [accel]

fld [esi+38]
fstp [deaccel]

fld [esi+28]
fstp [back]

fld [esi+24]
fstp [strafe]

fld [esi+80]
fstp [jump]

mov [save],01
//-----------------------------------------------------------------------------
calculate:

But how would I revert them once the script has been disabled?
I've tried just doing this:

Code:

[DISABLE]
//code from here till the end of the code will be used to disable the cheat
//put back to normal
fld [speed]
fstp [esi+20]

fld [accel]
fstp [esi+34]

fld [deaccel]
fstp [esi+38]

fld [back]
fstp [esi+28]

fld [strafe]
fstp [esi+24]

fld [jump]
fstp [esi+80]
//

But it locks up and won't actually disable...

Zanzer
I post too much

Reputation: 126

Joined: 09 Jun 2013
Posts: 3278

Posted: Sun Jul 19, 2015 7:30 am Post subject:

Allocate a new variable stats and save the value of ESI into it.

Code:

alloc(stats,4)
registersymbol(stats)
newmem:
cmp [save],00
je saves
jmp calculate
//=============================================================================
saves:
mov [stats],esi
//save origins
fld [esi+20]
fstp [speed]

Then use Lua to update the corresponding addresses within [DISABLE].

Code:

[DISABLE]
{$lua}
local addr = readPointer("stats")
writeFloat(addr+0x20, readFloat("speed"))
writeFloat(addr+0x34, readFloat("accel"))
writeFloat(addr+0x38, readFloat("deaccel"))
writeFloat(addr+0x28, readFloat("back"))
writeFloat(addr+0x24, readFloat("strafe"))
writeFloat(addr+0x80, readFloat("jump"))

deama1234
Master Cheater

Reputation: 3

Joined: 20 Dec 2014
Posts: 328

Posted: Sun Jul 19, 2015 8:25 am Post subject:

Zanzer wrote:

Allocate a new variable stats and save the value of ESI into it.

Code:

Then use Lua to update the corresponding addresses within [DISABLE].

Code:

Hmm, doesn't seem to work; here's what my disable part looks like:

Code:

[DISABLE]
//code from here till the end of the code will be used to disable the cheat
{$lua}
local addr = readPointer("stats")
writeFloat(addr+0x20, readFloat("speed"))
writeFloat(addr+0x34, readFloat("accel"))
writeFloat(addr+0x38, readFloat("deaccel"))
writeFloat(addr+0x28, readFloat("back"))
writeFloat(addr+0x24, readFloat("strafe"))
writeFloat(addr+0x80, readFloat("jump"))

dealloc(newmem)
dealloc(half)
dealloc(container)
dealloc(jumpHeightMultiplier)
dealloc(speed)
dealloc(accel)
dealloc(deaccel)
dealloc(back)
dealloc(strafe)
dealloc(jump)
dealloc(save)
dealloc(stats)
unregistersymbol(half)
unregistersymbol(container)
unregistersymbol(jumpHeightMultiplier)
unregistersymbol(speed)
unregistersymbol(accel)
unregistersymbol(deaccel)
unregistersymbol(back)
unregistersymbol(strafe)
unregistersymbol(jump)
unregistersymbol(save)
unregistersymbol(stats)
"Game.dll"+EB824:
jp Game.gCCharacterMovement_PS::GetCurrentMaxSpeedOfDir+3F
fld dword ptr [esi+20]
//Alt: db 7A 19 D9 46 20

Dark Byte
Site Admin

Reputation: 471

Joined: 09 May 2003
Posts: 25828
Location: The netherlands

Posted: Sun Jul 19, 2015 9:29 am Post subject:

add

Code:

{asm}

above the first dealloc
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deama1234
Master Cheater

Reputation: 3

Joined: 20 Dec 2014
Posts: 328

Posted: Sun Jul 19, 2015 9:45 am Post subject:

Dark Byte wrote:

add

Code:

{asm}

above the first dealloc

Hmm, game still crashes.
Like this?

Code:

EDIT: Out of curiosity I added a "$" to it; now it works! But it doesn't revert the old values back...

Here's the whole script; maybe my fomular is screwed up? This inject point is executed repeatedly btw (I think like 1 every 1/5th a second).

Code:

[ENABLE]
//code from here to '[DISABLE]' will be used to enable the cheat
alloc(newmem,2048)
label(returnhere)
label(originalcode)
label(exit)

label(saves)
label(calculate)

alloc(half,16)
alloc(container,16)
alloc(jumpHeightMultiplier,16)
alloc(speed,4)
alloc(accel,4)
alloc(deaccel,4)
alloc(back,4)
alloc(strafe,4)
alloc(jump,4)
alloc(save,4)
alloc(stats,4)
registersymbol(half)
registersymbol(container)
registersymbol(jumpHeightMultiplier)
registersymbol(speed)
registersymbol(accel)
registersymbol(deaccel)
registersymbol(back)
registersymbol(strafe)
registersymbol(jump)
registersymbol(save)
registersymbol(stats)

half:
dd (float)2

jumpHeightMultiplier:
dd (float)1.5

newmem:
cmp [save],00
je saves
jmp calculate
//=============================================================================
saves:
mov [stats],esi
//save origins
fld [esi+20]
fstp [speed]

fld [esi+34]
fstp [accel]

fld [esi+38]
fstp [deaccel]

fld [esi+28]
fstp [back]

fld [esi+24]
fstp [strafe]

fld [esi+80]
fstp [jump]

mov [save],01
//-----------------------------------------------------------------------------
calculate:
//foward speed
fld [speed]
fiadd [endurance]

mov [container],(float)150

fsub [container]
fstp [esi+20]
//-----------------------------------------------------------------------------
//acceleration
fld [accel]
fiadd [endurance]
fstp [esi+34]
//-----------------------------------------------------------------------------
//deacceleration
fld [deaccel]
fisub [endurance]
fstp [esi+38]
//-----------------------------------------------------------------------------
//speed backwards
fild [endurance]
fdiv [half]
fadd [back]
fstp [esi+28]
//-----------------------------------------------------------------------------
//speed strafe
fild [endurance]
fdiv [half]
fadd [strafe]
fstp [esi+24]
//-----------------------------------------------------------------------------
//jump height
fild [strength]
fmul [jumpHeightMultiplier]
fadd [jump]
fstp [esi+80]

//=============================================================================
originalcode:
jp Game.gCCharacterMovement_PS::GetCurrentMaxSpeedOfDir+3F
fld dword ptr [esi+20]

exit:
jmp returnhere

"Game.dll"+EB824:
jmp newmem
returnhere:

[DISABLE]
//code from here till the end of the code will be used to disable the cheat
{$lua}
local addr = readPointer("stats")
writeFloat(addr+0x20, readFloat("speed"))
writeFloat(addr+0x34, readFloat("accel"))
writeFloat(addr+0x38, readFloat("deaccel"))
writeFloat(addr+0x28, readFloat("back"))
writeFloat(addr+0x24, readFloat("strafe"))
writeFloat(addr+0x80, readFloat("jump"))
{$asm}
dealloc(newmem)
dealloc(half)
dealloc(container)
dealloc(jumpHeightMultiplier)
dealloc(speed)
dealloc(accel)
dealloc(deaccel)
dealloc(back)
dealloc(strafe)
dealloc(jump)
dealloc(save)
dealloc(stats)
unregistersymbol(half)
unregistersymbol(container)
unregistersymbol(jumpHeightMultiplier)
unregistersymbol(speed)
unregistersymbol(accel)
unregistersymbol(deaccel)
unregistersymbol(back)
unregistersymbol(strafe)
unregistersymbol(jump)
unregistersymbol(save)
unregistersymbol(stats)
"Game.dll"+EB824:
jp Game.gCCharacterMovement_PS::GetCurrentMaxSpeedOfDir+3F
fld dword ptr [esi+20]
//Alt: db 7A 19 D9 46 20

Zanzer
I post too much

Reputation: 126

Joined: 09 Jun 2013
Posts: 3278

Posted: Sun Jul 19, 2015 11:18 am Post subject:

Did you start from a fresh game once you got the script working? Did it properly execute the "saves" routine in your script? Script looks correct. Does this injection code execute many times per second? I wonder if the Lua is setting the value, but then the injected code gets executed again and overwrites it. May need to add some skip everything logic that becomes true at the beginning of the [DISABLE].

deama1234
Master Cheater

Reputation: 3

Joined: 20 Dec 2014
Posts: 328

Posted: Sun Jul 19, 2015 11:53 am Post subject:

Zanzer wrote:

Did you start from a fresh game once you got the script working?
Did it properly execute the "saves" routine in your script?
Script looks correct.

Does this injection code execute many times per second?
I wonder if the Lua is setting the value, but then the injected code gets executed again and overwrites it.
May need to add some skip everything logic that becomes true at the beginning of the [DISABLE].

The values reset everytime I reload, or restart the game.
Yup, injection code is executed like 5 times a second.

Well, the idea is that once the values have been saved, the "save" variable gets a 1, which stops the save section from getting executed; but once the user wants to disable the cheat I want it to just overwrite the player's movement's with what has been saved.

Everything works fine; the values are saved to the "stats" variable and the "saved" section is executed once. Game doesn't even crash when I disable the lua stuff. It's just that once the script is disabled, the movement values are not changed to what they should be; so once I enable the script again it just adds on top of what has been already added.

Problem seems to be with the lua; maybe there's a way to do it with asms? I don't know anything about lua.

Since the values never change, I suppose I could add a bunch of "cmps", but that'd make things very confusing...?

EDIT: Well, I decided to just add cmps, that fixed it, works fine now; thanks for the help anyway.

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