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ASM Loop Through

 
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ghmarko
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PostPosted: Tue Jun 02, 2020 5:00 am    Post subject: ASM Loop Through Reply with quote
Here is some addresses access instruction how can i loop through it and compare each value on it with what i need, if yes jump to another label if not continue looping to second value ...etc
and thanks
Sorry for my bad english Crying or Very sad

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daspamer
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PostPosted: Tue Jun 02, 2020 12:24 pm    Post subject: Reply with quote
I assume you you want to compare unique values and assign each case a different procedure/action.
Code:

{$ASM}
//32bit
alloc(yourHook,2048)

yourHook:
 // let's say esi+4 holds the address
 push eax
 mov eax,[esi+4]
 cmp eax,#38240
    jne @F
  // you can, do here the mov[esi+10],#100 and jmp afterwards to @hookCleanup...
  call firstEntity
@@:
cmp eax,#38304
    jne @F
  call secondEntity
@@:
cmp eax 39776
    jne @F
  call thirdEntity
test eax,eax
     jne @hookCleanup
   call nullEntity
@hookCleanup:
 pop eax
jmp someAddressReturn

firstEntity:
  mov [esi+10], #100 // let's say health
ret

secondEntity:
  cmp [esi+8],1  // another unique id for example
     jne @F
    mov [esi+10],0
@@:
ret

thirdEntity:
   mov [esi+3c],(float)0 // let's say speed
ret

nullEntity:
   // eh, you may remove from array if you're saving entities to be able access from lua and such...
ret



someAddress:
jmp yourHook
someAddressReturn:


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ghmarko
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PostPosted: Wed Jun 03, 2020 4:22 am    Post subject: Reply with quote
@@:
@f
what is these mean?
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ParkourPenguin
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PostPosted: Wed Jun 03, 2020 10:43 am    Post subject: Reply with quote
They're labels. @@ is an anonymous label (no actual name), @f refers to the closest next label, and @b refers to the closest previous label.
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