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Index > Macroinstructions > new _align

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DMD



Joined: 05 Jun 2006
Posts: 24
DMD
hello everybody!

my friend wrote for me this macro:

Code:
macro _align _offset, _byte
 {
 if (_offset - 1) and $
 times _offset - ((_offset - 1) and $) db _byte
 end if
 }    


but I've got error

Code:
 invalid expression
 command:
 if(16-1)and $    


can somebody help? Embarassed

thank in advance! Smile

ps/
the autor's just busy now and can't help... Crying or Very sad
Post 21 Aug 2009, 05:53
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17715
Location: In your JS exploiting you and your system
revolution
I think you are using one of the relocatable format outputs (I can't be sure because you didn't post all your code). But try this:
Code:
macro _align _offset, _byte
 {
 if (_offset - 1) and RVA $
 times _offset - ((_offset - 1) and RVA $) db _byte
 end if
 }    
Post 21 Aug 2009, 06:02
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
LocoDelAssembly
What kind of alignment the macro does? (Or how is it used?)
Post 21 Aug 2009, 06:13
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DMD



Joined: 05 Jun 2006
Posts: 24
DMD
I'm really sorry I didn't post the code ! Embarassed

to revolution

your macro is work perfect! thanks alot! Smile

ps/

to LocoDelAssembly

ok,
Code:
_align  10h, 20h    

Wink
Post 21 Aug 2009, 09:38
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
LocoDelAssembly
hehe, sorry, I though it couldn't work Razz
Post 21 Aug 2009, 16:06
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Fanael



Joined: 03 Jul 2009
Posts: 168
Fanael
The name of the macro seems ugly for me (it begins with underscore...), can't it be called "align" (same as assembler's directive)? Consider this one:
Code:
macro align off*, b {
  if ~ b eq
    if (off - 1) and RVA $
      times off - ((off - 1) and RVA $) db b
    end if
  else
    align off
  end if
}    
Now you can write as follows:
Code:
align 16 ;padded with nops
db 0
align 16, 0 ;padded with zeros
db 1    
Post 24 Aug 2009, 16:21
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