macro to detect format

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rCX

Joined: 29 Jul 2007
Posts: 172
Location: Maryland, USA

rCX 07 Jul 2021, 01:43

Is there a way to write a macro that conditionally generates code based on the format eg, ELF, PE?

07 Jul 2021, 01:43

DimonSoft

Joined: 03 Mar 2010
Posts: 1228
Location: Belarus

DimonSoft 07 Jul 2021, 07:02

Thought about suggesting format detection feature like a month ago. Decided that it’s not worth even asking (for my case) since one can easily override the format directive with a macro, parse its parameters, write down the information needed and pass the parameters to the original directive. Although this may definitely get quite messy.

07 Jul 2021, 07:02

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20448
Location: In your JS exploiting you and your system

revolution 07 Jul 2021, 08:19

if we can make it a narrow test to detect just an executable variant of PE or ELF and assume it is just using the default settings then I think this might work:

Code:

format pe
;format elf executable

if rva $$ and 0xfff = 0
        display 'is pe',13,10
else
        display 'is elf',13,10
end if

Although there are probably lots of ways to trick this into getting it wrong. Sad

07 Jul 2021, 08:19

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