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Postal



Joined: 28 May 2006
Posts: 12
Location: Russia
Postal
In MASM after this Win procedure:
invoke wsprintf a,b,c

=====================================
add esp, x ; x = number of parameters * 4bytes
; x = 0Ch
=====================================

if use "call wsprintf" then "add esp, x" is not ADDED!!

In fasm "add esp, x" is not added in any case!!

Please check this!!!
Post 06 Jun 2006, 10:54
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UCM



Joined: 25 Feb 2005
Posts: 285
Location: Canada
UCM
You use, 'cinvoke wsprintf,a,b,c'
This is because wsprintf uses the C calling convention instead of the STDCALL calling convention.
(P.S. This question has been asked about 4+ times now. Oh well.)
Post 06 Jun 2006, 11:13
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Postal



Joined: 28 May 2006
Posts: 12
Location: Russia
Postal
So, where I can get the list about of usage all windows-procedures? (invoke or cinvoke)?
Post 06 Jun 2006, 12:12
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white_wight



Joined: 03 Feb 2006
Posts: 24
white_wight
Just look at 'include\macro\proc32.inc', and at http://flatassembler.net/docs.php?article=win32
Post 06 Jun 2006, 12:30
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17350
Location: In your JS exploiting you and your system
revolution
Quote:
So, where I can get the list about of usage all windows-procedures? (invoke or cinvoke)?
wsprintf is the only Win32 function that uses C calling convention. Check the FASM main page for documentation and download the windows help files. The "Win32 Programmer's Reference" has all the gory details about input/output arguments, structures, etc.
Post 06 Jun 2006, 14:41
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Postal



Joined: 28 May 2006
Posts: 12
Location: Russia
Postal
I assumed, that "invoke" should know as to process any function.
It is strange, as it is made in MASM.



Thanks.
Post 06 Jun 2006, 17:10
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Quantum



Joined: 24 Jun 2005
Posts: 122
Quantum
invoke in masm32 doesn't correcly fix unaligned (8-bit or 16-bit) parameters before pushing them into the stack. That's one of the many reasons I hate macros and never use 'em in my code.
Post 06 Jun 2006, 18:16
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