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Vasilev Vjacheslav



Joined: 11 Aug 2004
Posts: 392
Vasilev Vjacheslav 11 Feb 2007, 14:49
seems there are bug in calling convention with double macro:

Code:
format pe gui 4.0
entry start

include '%fasminc%\win32ax.inc'

section '.rdata' data readable writeable

  test1         dq -5.0
  test2         dd 5

;section '.data' readable writeable

section '.text' code readable writable executable

  start:
        ccall   _test,double [test1],test2
        invoke  ExitProcess,NULL

  proc  _test uses ebx esi edi, param1:QWORD,param2

        ret
  endp

section '.idata' import data readable writeable

  library       kernel32,'kernel32.dll',\
                user32,'user32.dll',\
                gdi32,'gdi32.dll',\
                comdlg32,'comdlg32.dll',\
                advapi32,'advapi32.dll'

  include       '%fasminc%\api\kernel32.inc'
  include       '%fasminc%\api\user32.inc'
  include       '%fasminc%\api\gdi32.inc'
  include       '%fasminc%\api\comdlg32.inc'
  include       '%fasminc%\api\advapi32.inc'


gives this

Code:
push    empty.00401008
push    dword ptr ds:[401004]
push    dword ptr ds:[401000]
call    empty.00402021
add     esp,0C  <--- ok, it's __cdecl
push    0
call    ExitProcess

push    ebp
mov     ebp,esp
push    ebx
push    esi
push    edi
pop     edi
pop     esi
pop     ebx
leave
retn    0C  <--- but what a hell is this?!
Post 11 Feb 2007, 14:49
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vid
Verbosity in development


Joined: 05 Sep 2003
Posts: 7103
Location: Slovakia
vid 11 Feb 2007, 16:51
just what you told compiler to produce. This is declaration of STDCALL proc, not declaration of C proc:
Code:
proc  _test uses ebx esi edi, param1:QWORD,param


study this
Post 11 Feb 2007, 16:51
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Vasilev Vjacheslav



Joined: 11 Aug 2004
Posts: 392
Vasilev Vjacheslav 12 Feb 2007, 12:39
yes, i am stupid Cool you know it

ps. why macro is one simple char 'c' instead of 'cdecl'?
Post 12 Feb 2007, 12:39
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vid
Verbosity in development


Joined: 05 Sep 2003
Posts: 7103
Location: Slovakia
vid 12 Feb 2007, 12:53
Quote:
ps. why macro is one simple char 'c' instead of 'cdecl'?

i agree, cdecl is better
Post 12 Feb 2007, 12:53
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Tomasz Grysztar



Joined: 16 Jun 2003
Posts: 8466
Location: Kraków, Poland
Tomasz Grysztar 12 Feb 2007, 14:28
Vasilev Vjacheslav wrote:
ps. why macro is one simple char 'c' instead of 'cdecl'?

Taken from MASM's syntax.
Post 12 Feb 2007, 14:28
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