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Index > Windows > how to put data-string to .data section?

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HarryTuttle



Joined: 26 Sep 2003
Posts: 211
Location: Poland
HarryTuttle
this masm's code :
Code:
; «««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««

    .486
    .model flat, stdcall
    option casemap :none   ; case sensitive

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    include \masm32\include\windows.inc
    include \masm32\include\user32.inc
    include \masm32\include\kernel32.inc
    include \masm32\include\gdi32.inc

    includelib \masm32\lib\user32.lib
    includelib \masm32\lib\kernel32.lib
    includelib \masm32\lib\gdi32.lib

    main PROTO

    ; ---------------------
    ; 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

; «««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««««

    .code

start:

    call main

    invoke ExitProcess,0

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main proc

    invoke MessageBox,0,SADD("blabla 1"),SADD("hejka Privalov"),MB_OK

    ret

main endp

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end start
    


puts all te strings to data section and code to .text section.

How should be writen the fasm code to do not mixed .code and .data after:

Code:
invoke MessageBox,0,"asasdasda","ytutrutrytry",0
    


because mixed code with the data is unreadable after disassembling.

I see that Privalov used call-trick and put in fasm strings data after call instruction (which pushed eip into the stack to point it)

regards!
harry

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Post 30 Mar 2004, 13:50
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comrade



Joined: 16 Jun 2003
Posts: 1137
Location: Russian Federation
comrade
You cannot put arbitrarily in the .data section, not even with new store directive. But, you can allocate sufficient space in .code section, just before entrypoint. Then using store and an accumulating pointer you can put all strings there.

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comrade (comrade64@live.com; http://comrade.ownz.com/)
Post 30 Mar 2004, 14:31
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Tomasz Grysztar



Joined: 16 Jun 2003
Posts: 7802
Location: Kraków, Poland
Tomasz Grysztar
There is also a solution based on fix feature, which is cumullating all the strings for the data section that is generated after the code section.
Post 30 Mar 2004, 15:18
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S.T.A.S.



Joined: 09 Jan 2004
Posts: 173
Location: Ru#27
S.T.A.S.
Post 31 Mar 2004, 08:35
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