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Need help with compare argument

 
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idk31
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Joined: 11 Jan 2016
Posts: 42

PostPosted: Fri Apr 14, 2017 2:12 pm    Post subject: Need help with compare argument Reply with quote

I'm trying to copy the address rcx to _player when the value at rcx+1a0 (_tmp) equals rbx+1a0 (_cam). Offsets are X coordinate of the player and camera. The opcode at playerAOB accesses many addresses. I only want the address with the same X value as the camera. This will eventually help me move the player around with the correct address isolated. The below isn't working. I'm probably missing something very simple. Thanks for checking it out.

Code:

aobscanmodule(camAOB,Obduction-Win64-Shipping.exe,00 00 00 0F 28 93 A0 01 00 00)
alloc(newmem,$1000,camAOB)

label(code)
label(return)

globalalloc(_cam,8)

newmem:

code:
  mov [_cam],rbx
  add [_cam],1A0
  movaps xmm2,[rbx+000001A0] // original line
  jmp return

camAOB+03:
  jmp code
  nop
  nop
return:
registersymbol(camAOB)

///////////////////////

aobscanmodule(playerAOB,Obduction-Win64-Shipping.exe,0F 28 89 A0 01 00 00 0F 28 05)
alloc(newmem2,$1000,playerAOB)

label(code2)
label(return2)

alloc(_tmp,8)
globalalloc(_player,8)

newmem2:

code2:
  movaps xmm1,[rcx+000001A0] // original line
  mov [_tmp],rcx
  add [_tmp],1A0
  cmp [_tmp],_cam
  jne return2
  mov [_player],rcx
  jmp return2

playerAOB:
  jmp newmem2
  nop
  nop
return2:
registersymbol(playerAOB)

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Zanzer
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Joined: 09 Jun 2013
Posts: 3278

PostPosted: Fri Apr 14, 2017 8:16 pm    Post subject: Reply with quote

I'm curious why you're not simply saving the value of RBX in the first script to [_player].
It appears like you're dealing with the same base address and the first instruction only touches the player.

Anyway...
Code:
  push rcx
  add rcx,1A0
  cmp [_cam],rcx
  pop rcx
  jne return2
  mov [_player],rcx
  jmp return2
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idk31
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Joined: 11 Jan 2016
Posts: 42

PostPosted: Sat Apr 15, 2017 12:34 am    Post subject: Reply with quote

Zanzer wrote:
I'm curious why you're not simply saving the value of RBX in the first script to [_player].
It appears like you're dealing with the same base address and the first


It may not look like it, but these are two separate bases. At +1a0 for some address they share the same value. Image to help illustrate what's going on:

http://i.imgur.com/CbqvsGD.png

I want to make _player equal 2DFFC1E0. I should be able to use this information, right?

EDIT: I tried Zanzer's solution above. It didn't work.

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