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MOV (Address Of Code) into EIP

 
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xlcs
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Joined: 14 Nov 2006
Posts: 945
PostPosted: Sat Nov 25, 2006 6:27 am    Post subject: MOV (Address Of Code) into EIP Reply with quote
hi, im trying make a script that automatically puts in the eip address for u, but im not very sure what i should do...

Quote:

[ENABLE]
registersymbol(code)
alloc(code, 1024)

code:
CODE GOES HERE


Address EIP should be into:
MOVING THE ADDY INTO EIP HERE

[DISABLE]
dealloc(code)
unregistersymbol(code)


1. do i need to register symbol for Address EIP should be into?

2. which one i the correct code for MOVING THE ADDY INTO EIP HERE

A. Mov Eip, Code (Move Address of Code into Adress of EIP?)
B. Mov EIP, [c0de] (Move value of code into address of EIP?)
C. Mov [EIP], Code (Move address of code into Value of EIP?)
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omgms
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Joined: 13 Jul 2006
Posts: 1254
Location: Hacking Island
PostPosted: Sat Nov 25, 2006 8:35 am    Post subject: Reply with quote
i try moving the address into eip too but can't
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dezuzi
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Joined: 09 Aug 2006
Posts: 146
Location: In your washing machine
PostPosted: Sat Nov 25, 2006 9:20 am    Post subject: Reply with quote
you cant change the EIP... if you want to change the return address do it on the stack
the EIP points to the next instruction in a code segment its not to be used to store data, either make a jump, or change the return address in the stack

not sure why you want to change the EIP
or use a different register to store your data.. i assume you wont need the data stored in it for a very long time so you could just replace it with its old value if its static
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TehWaffle
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Joined: 08 Jul 2006
Posts: 142
PostPosted: Sat Nov 25, 2006 9:23 am    Post subject: Reply with quote
Just use a JMP.
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