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Help needed (newbee question)
hi,

im trying to write hello world program in fasm

here is what i got, but it doesnt work:( 



format PE GUI 4.0

entry start



include 'include\kernel.inc'

include 'include\user.inc'



include 'include\macro\stdcall.inc'

include 'include\macro\import.inc'





section '.data' data readable writeable



       hConsoleOutput dd 0		; handle to console

       strHelloWorld db 'Hello World',10,0



section '.code' code readable executable



  start:

       invoke AllocConsole

	

       invoke GetStdHandle,STD_OUTPUT_HANDLE

       mov [hConsoleOutput],eax

       invoke lstrlen, strHelloWorld 

       invoke WriteConsole,hConsoleOutput,strHelloWorld,eax,0,0



  msg_loop:

       invoke GetAsyncKeyState,VK_ESCAPE

       test eax,eax

       jnz end_loop

       jmp msg_loop



  end_loop:



       invoke FreeConsole



       invoke ExitProcess,0



section '.idata' import data readable writeable



  library kernel,'KERNEL32.DLL',\

       user,'USER32.DLL'



  kernel:

  import AllocConsole,'AllocConsole',\

       GetStdHandle,'GetStdHandle',\

       lstrlen,'lstrlenA',\

       WriteConsole,'WriteConsoleA',\

       FreeConsole,'FreeConsole',\

       ExitProcess,'ExitProcess'



  user:

  import GetAsyncKeyState,'GetAsyncKeyState'


P.S. how to debug asm programs ?
Posted on 2002-07-16 20:41:38 by pahan
Help needed (newbee question)
Since I too, had just started coding using FASM. Please be nice :grin:


format PE CONSOLE 4.0

entry start



include '\fasm\EXAMPLES\WIN32\INCLUDE\kernel.inc'

include '\fasm\EXAMPLES\WIN32\INCLUDE\user.inc'

include '\fasm\EXAMPLES\WIN32\INCLUDE\macro\stdcall.inc'

include '\fasm\EXAMPLES\WIN32\INCLUDE\macro\import.inc'



section '.data' readable writeable



    g_dbText        DB 'Hello Cruel World', 0

    g_dwByteWrtn    DD ?

    

section '.code' readable writeable



start:



    invoke  GetStdHandle, STD_OUTPUT_HANDLE

    invoke  WriteFile, eax, g_dbText, 17, g_dwByteWrtn, NULL

    invoke  ExitProcess, NULL

    

section '.idata' import data readable writeable



library kernel,'KERNEL32.DLL'



kernel:

    import GetStdHandle, 'GetStdHandle', \

           WriteFile, 'WriteFile', \

           ExitProcess, 'ExitProcess'
This one is the basic Hello Cruel World Console. :grin:

::edit::

Does FASM have a SIZEOF/LENGTHOF ??? Can't seem to find it.
Posted on 2002-07-17 00:18:49 by stryker
Help needed (newbee question)



Does FASM have a SIZEOF/LENGTHOF ??? Can't seem to find it.



Look at the include files: 



struc WNDCLASSEX

 {

   .cbSize	  dd ?

   .style	  dd ?

   .lpfnWndProc   dd ?

   .cbClsExtra	  dd ?

   .cbWndExtra	  dd ?

   .hInstance	  dd ?

   .hIcon	  dd ?

   .hCursor	  dd ?

   .hbrBackground dd ?

   .lpszMenuName  dd ?

   .lpszClassName dd ?

   .hIconSm	  dd ?

[b]   .size	  = $-.cbSize[/b]

 }


Don't think there is one if Thomasz uses that way for calculating the size :/
Posted on 2002-07-17 02:00:52 by bazik
Help needed (newbee question)
How weird... Anyway, I was asking because I don't want to count the characters in a string.


format PE CONSOLE 4.0

entry start



include '\fasm\EXAMPLES\WIN32\INCLUDE\kernel.inc'

include '\fasm\EXAMPLES\WIN32\INCLUDE\user.inc'

include '\fasm\EXAMPLES\WIN32\INCLUDE\macro\stdcall.inc'

include '\fasm\EXAMPLES\WIN32\INCLUDE\macro\import.inc'



section '.data' readable writeable



    g_dbText        DB 'Hello Cruel World', 0

    g_szText = $-g_dbText

    g_dwByteWrtn    DD ?

    

section '.code' readable writeable



start:



    invoke  GetStdHandle, STD_OUTPUT_HANDLE

    invoke  WriteFile, eax, g_dbText, g_szText, g_dwByteWrtn, NULL

    invoke  ExitProcess, NULL

    

section '.idata' import data readable writeable



library kernel,'KERNEL32.DLL'



kernel:

    import GetStdHandle, 'GetStdHandle', \

           WriteFile, 'WriteFile', \

           ExitProcess, 'ExitProcess'
Thanks for the info!!!
Posted on 2002-07-17 02:10:27 by stryker
Help needed (newbee question)
I found the problem in my program :)

insted of

invoke WriteConsole,hConsoleOutput,strHelloWorld,eax,0,0

i needed to put

invoke WriteConsole,,strHelloWorld,eax,0,0

Thanks for responses :alright:
Posted on 2002-07-17 02:23:42 by pahan
Help needed (newbee question)
How weird... Anyway, I was asking because I don't want to count the characters in a string.


but isn't it possible to use "lstrlen" or even the string commands to do the job in FASM?

cya
Posted on 2002-07-17 12:05:30 by NOP-erator
Help needed (newbee question)
lstrlen counts the length of a string during runtime, this isn't practical if the string is already known like the one I declared on the data section. I only use lstrlen if the string is unknown in size. While SIZEOF/LENGTHOF in MASM/TASM are performed during assembly time. Thus saving time, space, cycle counts...

You don't need lstrlen to give the string count, SIZEOF/LENGTHOF can just place an immediate value right then and there.
Posted on 2002-07-17 12:09:45 by stryker
Help needed (newbee question)
The interesting solution is to redefine the
labeled variant of DB directive using the struc macro: 


struc DB [data]

 { common .start db data

   .size = $ - .start }


Now with the following definition: 


g_dbText DB 'Hello Cruel World'

g_dbText is the label for data and g_dbText.size is the size of that data.
Posted on 2002-07-17 14:38:58 by Tomasz Grysztar
Help needed (newbee question)
Wow, I never knew it's that flexible. :alright: Thanks!!!
Posted on 2002-07-17 14:44:41 by stryker