Need Help on Macro Instruction

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3ric

Joined: 19 Dec 2013
Posts: 14

3ric 19 Dec 2013, 11:13

i want to achieve something using macro in the following code

macro put .add,[val]
{
forward
MOV [EBP+.add],val

}

put 0x100, 0x12345678, 0x87654321, 0x34567812

so i want to get the these results

MOV [EBP+0x100],0x12345678
MOV [EBP+0x104],0x87654321
MOV [EBP+0x108],0x34567812

i am unable to find out a way to increase offset value by 0x04 on every instruction.

plz help me guys

19 Dec 2013, 11:13

l_inc

Joined: 23 Oct 2009
Posts: 881

l_inc 19 Dec 2013, 11:57

3ric

Code:

macro put offset,[val*]
{
        common local cntr
                cntr = offset
        forward
                mov dword[ebp+cntr],val
                cntr = cntr+4
}

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Faith is a superposition of knowledge and fallacy

19 Dec 2013, 11:57

3ric

Joined: 19 Dec 2013
Posts: 14

3ric 19 Dec 2013, 12:16

thank you so much l_inc

19 Dec 2013, 12:16

baldr

Joined: 19 Mar 2008
Posts: 1651

baldr 19 Dec 2013, 12:41

3ric,

For extra flexibility it can be rewritten as follows:

Code:

macro put offset,[val*]
{
        common local delta
                delta = 0
        forward
                mov dword [ebp+offset+delta], val
                delta = delta+4
}

Then you can use something like put eax*8+0x100, 0x12345678, 0x87654321, 0x34567812 too.

19 Dec 2013, 12:41

l_inc

Joined: 23 Oct 2009
Posts: 881

l_inc 19 Dec 2013, 13:40

baldr wrote:

Then you can use something like ...

Good point. As always, however.

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Faith is a superposition of knowledge and fallacy

19 Dec 2013, 13:40

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