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malu05
How do I cheat?
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Joined: 11 Apr 2010
Posts: 3
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 Posted: Sun Apr 11, 2010 5:29 pm Post subject: [BUG] - ASM interpretation |
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When viewing this code in the cheat engine assembler:
| Code: | | A0 78 56 34 12 : mov ax,[12345678] |
If i hit the opcode and change it to "mov ax,[12345678]" (the same)
CheatEngine will change the exact same opcode to:
| Code: | | 66 8B 05 78 56 34 12 : mov ax,[12345678] |
(where did "66 8B 05" come from?  ) |
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Dark Byte
Site Admin
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Joined: 09 May 2003
Posts: 25840
Location: The netherlands
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| Posted: Sun Apr 11, 2010 5:32 pm Post subject: |
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it's an alternate way to write this instruction, when executed, it'll have the same effect
Looks like ce just didn't pick the smallest possible instruction but the most compatible one
only way to get it to compile this instruction with the A0 instruction is:
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malu05
How do I cheat?
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Joined: 11 Apr 2010
Posts: 3
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| Posted: Sun Apr 11, 2010 5:40 pm Post subject: |
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| Dark Byte wrote: | it's an alternate way to write this instruction, when executed, it'll have the same effect
Looks like ce just didn't pick the smallest possible instruction but the most compatible one
only way to get it to compile this instruction with the A0 instruction is:
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Ye, could see that from the instruction set.
I just find it funny that it wanted to overwrite it with something bigger than the original hence screwing up the code. But hey...
Never really thought about it but ive been using your tool for like 2 years now, and i must say i have learned soo much.
On one hand i feel like such a newb not moving on the IDA or Olly but hey, there is a certain charm to "simple" yet effective tools (note the "" around simple, but i guess you know what i mean).
Thanks alot for all your hard work! |
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Slugsnack
Grandmaster Cheater Supreme
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Joined: 24 Jan 2007
Posts: 1857
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| Posted: Sun Apr 11, 2010 7:09 pm Post subject: |
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| malu05 wrote: | I just find it funny that it wanted to overwrite it with something bigger than the original hence screwing up the code. But hey...
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it would mess up in the same way if it overwrote a bigger code with a smaller one :/ |
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Radiation
Grandmaster Cheater
 Reputation: 14
Joined: 17 Jun 2009
Posts: 842
Location: Chernobyl
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| Posted: Mon Apr 12, 2010 12:54 am Post subject: |
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| Slugsnack wrote: | | malu05 wrote: | I just find it funny that it wanted to overwrite it with something bigger than the original hence screwing up the code. But hey...
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it would mess up in the same way if it overwrote a bigger code with a smaller one :/ |
unless you NOP the remaining bytes 
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