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Xblade Of Heaven
Master Cheater
 Reputation: 0
Joined: 16 Oct 2005
Posts: 395
Location: DEAD
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 Posted: Tue Jun 09, 2009 10:11 am Post subject: assembler problem |
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hello all I want to comment on a problem I have to move when a specific area code, I can not write here, the possibility of writing address 00400019 in?
my example:
| Code: |
[ENABLE]
alloc(newmem,256) //2kb should be enough
label(returnhere)
Sam2Game.dll+7b6c9:
jmp newmem
nop
returnhere:
newmem:
pushad
//jmp 00403064
lea ebx,[esi+00000488]
cmp [00402fe4],ebx
mov [00402fe4],00000000
je 0330eee7
cmp [00402fe0],ebx
mov [00402fe0],7de9ef58
je 0330eee7
popad
mov [esi+00000488],00000000
jmp 0313b6ce
popad
mov [esi+00000488],eax
jmp 0313b6ce
[DISABLE]
dealloc(newmem)
Sam2Game.dll+7b6c9:
mov [esi+00000488],eax
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IMAGE WHITOUT WRITE CODE
any can help me?
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Dark Byte
Site Admin
 Reputation: 471
Joined: 09 May 2003
Posts: 25813
Location: The netherlands
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| Posted: Tue Jun 09, 2009 10:49 am Post subject: |
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Well, first one, why do you want to write to 00402fe4 and not just alloc a 4 byte region to store it in instead?
| Code: |
alloc(newmem,256) //2kb should be enough
alloc(temp,4)
label(returnhere)
...
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and replace every 00402fe4 with the word temp (perhaps combined with registersymbol so you can find it in other scripts as well)
anyhow, if you insist on using a read only address to store the value on, add the line "Fullaccess(00402fe4,4)"
that'll make sure the region that address is in will be writable
also, kinda unrelated, but I recommend changing address like 0330eee7 to modulename+offset notations, next time the game restarts those addresses will be different
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