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DeletedUser412833
How do I cheat?

Reputation: 1

Joined: 09 Feb 2017
Posts: 0

Posted: Thu Mar 03, 2016 3:30 pm Post subject:

Code:

alloc(newmem,1024,chess.exe)
createthread(newmem)
newmem:
sub rsp,20
call chess.exe+41990
add rsp,20
ret

This one is working without crashes. Could you please explain why we have to use these sub and add and where from we are getting them?

ParkourPenguin
I post too much

Reputation: 155

Joined: 06 Jul 2014
Posts: 4772

Posted: Thu Mar 03, 2016 3:42 pm Post subject:

I already did.

ParkourPenguin wrote:

From here:

Quote:

The caller is responsible for allocating space for parameters to the callee, and must always allocate sufficient space for the 4 register parameters, even if the callee doesn’t have that many parameters.

DB also did.

Dark Byte wrote:

e.g it looks like you're not allocating space on the stack for the scratchspace the function can use. It could therefore have overwritten the return address

_________________

I don't know where I'm going, but I'll figure it out when I get there.

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