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Disable code doesn't return it as intended?

 
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Qvintus
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Joined: 07 Nov 2013
Posts: 32
PostPosted: Wed Jun 11, 2014 5:13 pm    Post subject: Disable code doesn't return it as intended? Reply with quote
I've got me a piece of code here, there is suppose to nop out a functionality and then return it as it was when disabled. However it seems to have its own idea of how this is done.

Code:

[ENABLE]
aobscan(combo, 89 8E 80 00 00 00 F3 0F11 46 4C)
label(_combo)
registersymbol(_combo)

combo+7:
_combo:
db 90 90 90 90 90
 
[DISABLE]
_combo:
db F3 0F11 46 4C
unregistersymbol(_combo)


So the above is suppose to return the byte
Code:
F3 0F11 46 4C

However it ends up returning:
Code:
F3 F3 11 46 4C

That is not what I asked for. How do I fix this and why does it do it?

Original
Code:
movss [esi+4C],xmm0

After Disable
Code:
repe adc[esi+4C],eax


I am quite lost at where I f'ed up.
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++METHOS
I post too much
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Joined: 29 Oct 2010
Posts: 4197
PostPosted: Wed Jun 11, 2014 5:22 pm    Post subject: This post has 1 review(s) Reply with quote
Offset is wrong.

Should be +6.
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Qvintus
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Joined: 07 Nov 2013
Posts: 32
PostPosted: Wed Jun 11, 2014 5:25 pm    Post subject: Reply with quote
++METHOS wrote:
Offset is wrong.

Should be +6.


Well same thing returns me with
Code:
F3 11 46 4C
instead

Also ends up with 4 instead 5 so I assume my offset was correct?

Sorry my bad! Adding a space between 0F and 11 fixed it. And ofc the offset to 6.
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