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PinPoint
Expert Cheater
 Reputation: 10
Joined: 07 Apr 2016
Posts: 223
Location: Scotland
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 Posted: Wed May 04, 2016 3:25 pm Post subject: pointer offset as a compare before writing the same pointer? |
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Im using CREATETHREAD to constantly write to a pointer. The only thing is that the game crashes when I go through a map change/check/loadpoint and it updates the address.
The base of the pointer and its first offset value is the same every game and changes for 3-4 seconds when a checkpoint is reached before going back to normal.
So i want to compare the value stored within this offset and if it is not what it should be (i.e not in normal game) then dont write.
I came up with this code which doesn't write the value or crash the game. (If i remove the check: part and cont: line, it works fine but obv crashes on checkpoints) Can someone help me understand why this isnt working and point out what I might be missing?
I tried using call and ret but wasnt sure exactly how to use them so went with labels and jumps
| Code: | [ENABLE]
globalalloc(inf_health,1000)
CREATETHREAD(inf_health)
registersymbol(end)
label(end)
label(check)
label(cont)
inf_health:
mov eax,[Engine.dll+00617388]
mov eax,[eax+C4]
jmp check
cont:
mov eax,[eax+688]
mov eax,[eax+58]
mov word ptr [eax+2FC],#1000
push #500
call sleep
cmp [end],01
jne inf_health
ret
end:
dd 0
check:
cmp [eax],26612C
jne check
jmp cont
[DISABLE]
end:
dd 01
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I have done this in the past fine but with using a different address altogether for the compare.
Thanks
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Zanzer
I post too much
![]() Reputation: 126
Joined: 09 Jun 2013
Posts: 3278
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| Posted: Wed May 04, 2016 6:05 pm Post subject: |
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| Code: | mov eax,[Engine.dll+00617388]
test eax,eax
je skip
mov eax,[eax+C4]
test eax,eax
je skip
mov eax,[eax+688]
test eax,eax
je skip
mov eax,[eax+58]
test eax,eax
je skip
mov word ptr [eax+2FC],#1000
skip: |
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ParkourPenguin
I post too much
 Reputation: 152
Joined: 06 Jul 2014
Posts: 4706
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| Posted: Wed May 04, 2016 6:19 pm Post subject: |
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| Code: | check:
cmp [eax],26612C
jne check |
I'd guess the thread eventually gets caught in this infinite loop. I don't know why you're jumping to this anyways; you could simplify it by putting that block where the jump to it is.
_________________
I don't know where I'm going, but I'll figure it out when I get there. |
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PinPoint
Expert Cheater
Reputation: 10
Joined: 07 Apr 2016
Posts: 223
Location: Scotland
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| Posted: Thu May 05, 2016 12:53 am Post subject: |
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| Zanzer wrote: | | Code: | mov eax,[Engine.dll+00617388]
test eax,eax
je skip
mov eax,[eax+C4]
test eax,eax
je skip
mov eax,[eax+688]
test eax,eax
je skip
mov eax,[eax+58]
test eax,eax
je skip
mov word ptr [eax+2FC],#1000
skip: |
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This still crashes the game. I can activate it at the main menu fine though and when i go into game its working until chekpoint/map change etc.
| ParkourPenguin wrote: | | I'd guess the thread eventually gets caught in this infinite loop. I don't know why you're jumping to this anyways; you could simplify it by putting that block where the jump to it is. |
I had tried having the compare where the jump was initially but it still crashed.
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++METHOS
I post too much
![]() Reputation: 92
Joined: 29 Oct 2010
Posts: 4197
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| Posted: Thu May 05, 2016 7:10 am Post subject: |
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| PinPoint wrote: | | ParkourPenguin wrote: | | I'd guess the thread eventually gets caught in this infinite loop. I don't know why you're jumping to this anyways; you could simplify it by putting that block where the jump to it is. |
I had tried having the compare where the jump was initially but it still crashed. |
-Moving the compare is not the issue, ParkourPenguin was just pointing out that it isn't necessary to have your compare in a separate block of code (i.e. you don't need to jump to it, you can just include it at the beginning).
The issue is with the compare. As ParkourPenguin suggests, you are potentially trapping unwanted code inside of a loop, hoping that it's going to change when it never will. Just let it exit.
Also, another issue that could be causing the crash is that you're not checking if your pointer data is valid...this is what Zanzer was suggesting. However, it doesn't look like Zanzer included your compare, which I assume is needed to avoid changing unwanted code.
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Cake-san
Grandmaster Cheater
 Reputation: 8
Joined: 18 Dec 2014
Posts: 541
Location: Semenanjung
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| Posted: Sun May 08, 2016 5:39 am Post subject: |
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| Code: |
[ENABLE]
globalalloc(inf_health,1000)
CREATETHREAD(inf_health)
registersymbol(end)
label(end)
label(_exit)
inf_health:
mov eax,[Engine.dll+00617388]
cmp eax,0
je _exit
mov eax,[eax+C4]
cmp eax,0
je exit
cmp [eax],26612C
jne exit
mov eax,[eax+688]
cmp eax,0
je _exit
mov eax,[eax+58]
cmp eax,0
je _exit
mov word ptr [eax+2FC],#1000
_exit:
push #500
call sleep
cmp [end],01
jne inf_health
ret
end:
dd 0
[DISABLE]
end:
dd 01
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