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Index > Macroinstructions > macro to detect format

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rCX



Joined: 29 Jul 2007
Posts: 172
Location: Maryland, USA
rCX
Is there a way to write a macro that conditionally generates code based on the format eg, ELF, PE?
Post 07 Jul 2021, 01:43
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DimonSoft



Joined: 03 Mar 2010
Posts: 955
Location: Belarus
DimonSoft
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.
Post 07 Jul 2021, 07:02
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 18196
Location: In your JS exploiting you and your system
revolution
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
Post 07 Jul 2021, 08:19
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