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EagleEye



Joined: 02 Feb 2012
Posts: 3
EagleEye
I want to convert the following snippet from IDA ASM to FASM ASM. I can do this with most of the procs I ran into so far, because they took no arguments, but this one takes a thingy (pointer I guess? C# has sort of spoiled me), a uint, another uint, and a long. Would I simply make this "proc Windows_Procedure hWnd Msg wParam lParam"? If I do, do I remove their initializations down there?

Code:
; int __stdcall    Windows_Procedure(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
long Windows_Procedure(void *, unsigned     int, unsigned int, long) proc near
                                      ; DATA XREF: Create_Main_Window(void *,int,int,int)+11o

hWnd                = dword ptr  4
Msg           = dword ptr  8
wParam                = dword ptr  0Ch
lParam              = dword ptr  10h    


Also, in "abs_ proc near", does the near mean anything important? If so, does it have an equivalent in FASM? Do I have to say that a proc returns nothing or an int or a long in FASM, like IDA does? IDA is honestly not a very good ASM teacher, being designed mainly for people who need information, not valid code, but you know. Very Happy

P.S. I apologize for not reading over the manual very carefully; I have to use the lame excuse of college, I'm afraid.
Post 02 Feb 2012, 04:05
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17344
Location: In your JS exploiting you and your system
revolution
For 32-bit code under Windows all procs are near.
Code:
include 'win32a.inc'
;...
proc Windows_Procedure uses ebx esi edi, hWnd, Msg, wParam, lParam
  mov eax,[hWnd]
  ;...
  ret
endp    
Post 02 Feb 2012, 04:14
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EagleEye



Joined: 02 Feb 2012
Posts: 3
EagleEye
Thanks. Just wondering, where does the "mov eax,[hWnd]" come from?
Post 02 Feb 2012, 13:08
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17344
Location: In your JS exploiting you and your system
revolution
EagleEye wrote:
Just wondering, where does the "mov eax,[hWnd]" come from?
It is just an example of how to access the function parameters.
Post 02 Feb 2012, 13:29
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EagleEye



Joined: 02 Feb 2012
Posts: 3
EagleEye
Oh, I see. I though it was copying eax to hWnd. That makes sense now. Thank you. Smile
Post 02 Feb 2012, 21:06
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