Use string as func param

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Andrey

Joined: 20 Oct 2008
Posts: 1

Andrey 20 Oct 2008, 16:09

Hi to all. I am wondering how I can put string as func param. Something like that

Code:

invoke MessageBox,0, SADD("blabla"), SADD("blabla"),MB_OK

In masm there are 3 macro which do that.

Code:

; ---------------------
    ; literal string MACRO
    ; ---------------------
      literal MACRO quoted_text:VARARG
        LOCAL local_text
        .data
          local_text db quoted_text,0
        .code
        EXITM <local_text>
      ENDM
    ; --------------------------------
    ; string address in INVOKE format
    ; --------------------------------
      SADD MACRO quoted_text:VARARG
        EXITM <ADDR literal(quoted_text)>
      ENDM 
    ; --------------------------------
    ; string offset for manual coding
    ; --------------------------------
     CTXT MACRO quoted_text:VARARG
        EXITM <offset literal(quoted_text)>
     ENDM

But the problem is in that I do not know how to translate this 3 macro into fasm macro code. If some one know please help me.

Thanks in advance.

20 Oct 2008, 16:09

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20623
Location: In your JS exploiting you and your system

revolution 20 Oct 2008, 17:19

Have a look at the sample program that comes with the Windows version download hello.asm

Code:

; example of simplified Win32 programming using complex macro features

include 'win32ax.inc'

.code

  start:
    invoke  MessageBox,HWND_DESKTOP,"Hi! I'm the example program!","Win32 Assembly",MB_OK
  invoke  ExitProcess,0

.end start

20 Oct 2008, 17:19

LocoDelAssembly
Your code has a bug

Joined: 06 May 2005
Posts: 4624
Location: Argentina

LocoDelAssembly 20 Oct 2008, 18:06

Note however that the invoke macro embeds the string on the code instead of storing it on a data section as MASM does.

20 Oct 2008, 18:06

vador

Joined: 12 Nov 2006
Posts: 68
Location: Madagascar

vador 21 Oct 2008, 12:14

and if you use a string several times, it will be repeated in the executable

21 Oct 2008, 12:14

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