if not defined set value in macro. How do this ?

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Index > Macroinstructions > if not defined set value in macro. How do this ?

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Roman

Joined: 21 Apr 2012
Posts: 1796

Roman 23 Dec 2020, 17:48

I have macro.

Code:

macro var chN,chSz {
        if ~ defined Vars_offst
        Vars_offst equ 0
        end if
        chN EQU AllVars+Vars_offst  
        Vars_offst equ Vars_offst+chSz
        }  
in code:
var P1,4
var P2,4
mov [P1],2
mov [P2],8

IDA pro show the same address.
mov [0x408080],2
mov [0x408080],8

But I expected:
mov [0x408080],2
mov [0x408084],8

23 Dec 2020, 17:48

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20344
Location: In your JS exploiting you and your system

revolution 24 Dec 2020, 00:22

Mixing preprocessor and assembler stages is causing you trouble.

Replace equ with =.

equ: preprocessor stage
defined: assembler stage

24 Dec 2020, 00:22

Roman

Joined: 21 Apr 2012
Posts: 1796

Roman 24 Dec 2020, 06:30

I replace all EQU on = and work.
Thanks.

24 Dec 2020, 06:30

Roman

Joined: 21 Apr 2012
Posts: 1796

Roman 24 Dec 2020, 06:32

Another question how do this ?

Code:

macro some { }

some Val,4  ;this generate Val._1 then Val._2 then Val._3 then Val._4
some Val2,7 
some Val3,2
some Val4,5
some Val5,12

Get this:

Code:

mov [Val._1],1.0  ;its mean Val+0
mov [Val._2],2.0  ;its mean Val+4
mov [Val._3],3.0  ;its mean Val+8
mov [Val._4],4.0  ;its mean Val+12

I know about struct but in this case i must writed a lot structs. This is not handful and not convenient.

24 Dec 2020, 06:32

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