Determine whether 32bit or 64bit is used

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Index > Macroinstructions > Determine whether 32bit or 64bit is used

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yoshimitsu

Joined: 07 Jul 2011
Posts: 96

yoshimitsu 28 Apr 2012, 21:34

I'd like to write a macro which includes a corresponding file depending on the generated code like

Code:

if use32
  include '32bitfile'
else if use64
  include '64bitfile'
end if

Is there an official way for this or do I have to use a virtual-trick like

Code:

local x64
virtual
 nop [eax]
 load x64 from $$
 if x64 = 67h
  x64 = 1
 else
  x64 = 0
 end if
end virtual

if x64
 display '64bit'
else
 display '32bit'
end if

Last edited by yoshimitsu on 28 Apr 2012, 22:26; edited 1 time in total

28 Apr 2012, 21:34

JohnFound

Joined: 16 Jun 2003
Posts: 3499
Location: Bulgaria

JohnFound 28 Apr 2012, 22:12

There is no official way. But IMHO the trick with virtual is OK.

28 Apr 2012, 22:12

baldr

Joined: 19 Mar 2008
Posts: 1651

baldr 02 Jun 2012, 21:37

yoshimitsu,

Probably somewhat quirky solution can be found there. Note that your mix of preprocessor's and interpreter's directives going to include both files.

Unless you're cross-compiling, include "%Processor_Architecture%.finc" with properly defined x86.finc and such will fit the bill.

02 Jun 2012, 21:37

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 19075
Location: In your JS exploiting you and your system

revolution 02 Jun 2012, 22:16

baldr wrote:

Note that your mix of preprocessor's and interpreter's directives going to include both files.

Yes, both files are included but they are still assembled within the if/else/end if context. This may or mat not work depending upon the exact contents of the two files.

02 Jun 2012, 22:16

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