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lamafao
Expert Cheater
 Reputation: 1
Joined: 17 Apr 2013
Posts: 130
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 Posted: Tue Apr 29, 2014 10:04 am Post subject: [HELP]Need some help with asm code |
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I know it's a long code, but maybe someone could help me, and tell me why am i crashing for no reason, or when changing a map with script on?
Also i am a little confused where to pop ecx.
Thanks
| Code: | 0B0D1653 - D9 1E - fstp dword ptr [esi]
0B0D1655 - D9 5E 04 - fstp dword ptr [esi+04]
0B0D1658 - D9 5E 08 - fstp dword ptr [esi+08]
0B0D165B - 5B - pop ebx
0B0D165C - 5E - pop esi
0B0D165D - 5F - pop edi
0B0D165E - 5D - pop ebp |
Crashing after some time even without mob_to_saved/s_enable/l_enable on
| Code: | [ENABLE]
Aobscan(coordaddr,D9 1E D9 5E 04 D9 5E 08 5B 5E 5F 5D)
alloc(newmem,4096)
label(returnhere)
label(x)
label(y)
label(poppy)
label(save_coord)
label(load_coord)
label(s_enable)
label(l_enable)
label(player)
label(enemy)
label(mobToSavedCoordinates)
label(mob_to_saved)
registersymbol(x)
registersymbol(y)
registersymbol(coordaddr)
registersymbol(s_enable)
registersymbol(l_enable)
registersymbol(mob_to_saved)
newmem:
fstp dword ptr [esi]
fstp dword ptr [esi+04]
push ecx
mov ecx,[esi+50]
mov ecx,[ecx]
mov ecx,[ecx+04]
cmp ecx,(int)596 //If player
je player
cmp ecx,(int)248 //If bullets
je poppy
jmp enemy
enemy:
cmp [mob_to_saved],1
je mobToSavedCoordinates
jmp poppy
player:
cmp [s_enable],1
je save_coord
cmp [l_enable],1
je load_coord
jmp poppy
//save player coordinates
save_coord:
mov [s_enable],0
push eax
mov eax,[esi]
mov [x],eax
mov eax,[esi+04]
mov [y],eax
pop eax
jmp poppy
//Player to saved coordinates
load_coord:
mov [l_enable],0
cmp [x],0
je poppy
push eax
mov eax,[x]
mov [esi],eax
mov eax,[y]
mov [esi+04],eax
pop eax
jmp poppy
//Enemy to saved coordinates
mobToSavedCoordinates:
push eax
mov eax,[x]
mov [esi],eax
mov eax,[y]
mov [esi+04],eax
pop eax
jmp poppy
poppy:
pop ecx
jmp returnhere
x:
dd 0
y:
dd 0
s_enable:
dd 0
l_enable:
dd 0
mob_to_saved:
dd 0
coordaddr:
jmp newmem
returnhere:
[DISABLE]
dealloc(newmem)
unregistersymbol(x)
unregistersymbol(y)
unregistersymbol(s_enable)
unregistersymbol(l_enable)
unregistersymbol(coordaddr)
unregistersymbol(mob_to_saved)
coordaddr:
fstp dword ptr [esi]
fstp dword ptr [esi+04] |
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mgr.inz.Player
I post too much
 Reputation: 218
Joined: 07 Nov 2008
Posts: 4438
Location: W kraju nad Wisla. UTC+01:00
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| Posted: Tue Apr 29, 2014 11:42 am Post subject: |
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Launch game, attach OllyDbg to that game, resume process (because OllyDbg pauses process while attaching). Now launch CE and enable script. Play the game.
After a while, game will freeze, go to OllyDbg. On the bottom there will be exception type. Faulty opcode will be highlighted. My bet is, it will be "access violation" exception.
Then try changing this to something else:
| Code: | mov ecx,[esi+50]
mov ecx,[ecx]
mov ecx,[ecx+04] |
maybe this will be enough:
| Code: | mov ecx,[esi+50]
cmp ecx,00010000
jbe poppy
mov ecx,[ecx]
cmp ecx,00010000
jbe poppy
mov ecx,[ecx+04] |
_________________
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lamafao
Expert Cheater
Reputation: 1
Joined: 17 Apr 2013
Posts: 130
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| Posted: Tue Apr 29, 2014 12:27 pm Post subject: |
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| mgr.inz.Player wrote: | Launch game, attach OllyDbg to that game, resume process (because OllyDbg pauses process while attaching). Now launch CE and enable script. Play the game.
After a while, game will freeze, go to OllyDbg. On the bottom there will be exception type. Faulty opcode will be highlighted. My bet is, it will be "access violation" exception.
Then try changing this to something else:
| Code: | mov ecx,[esi+50]
mov ecx,[ecx]
mov ecx,[ecx+04] |
maybe this will be enough:
| Code: | mov ecx,[esi+50]
cmp ecx,00010000
jbe poppy
mov ecx,[ecx]
cmp ecx,00010000
jbe poppy
mov ecx,[ecx+04] |
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You were right "Access violation when reading [00000000]"
The code that you gave worked, thanks a lot.
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