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Title: text macro
Post by: korte on March 18, 2007, 10:16:00 PM

How to define macro?

aaaXXXbbb proc
.
.
.
aaaXXXbbb endp

defi "XXX"

I want to macro define dword pointer to aaaXXXbbb, but macro parameter only "XXX" string.
(aaa bbb fix)

thx

Title: Re: text macro
Post by: MichaelW on March 18, 2007, 11:44:55 PM

I can't think of any universal way to do this. This will work within limits, but if the macro is called from within a procedure that has a stack frame, MASM will return "error A2144: cannot nest procedures".

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    include \masm32\include\masm32rt.inc
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    defpp MACRO tag:REQ
      LOCAL pname
      LOCAL qtag                      ;; this just for test
      pname CATSTR <aaa>,<tag>,<bbb>
      qtag  CATSTR <">,<tag>,<">      ;; this just for test
      jmp @F
      pname proc
        print %qtag,13,10             ;; this just for test
        ret
      pname endp
    @@:
      EXITM <OFFSET pname>
    ENDM

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    .data
    .code
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testproc proc ;xxxxx:DWORD
    mov eax, defpp(ZZZ)
    call eax
    call aaaZZZbbb
    ret
testproc endp

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    mov eax, defpp(XXX)
    call eax
    call aaaXXXbbb
    mov eax, defpp(YYY)
    call eax
    call aaaYYYbbb

    call testproc

    inkey "Press any key to exit..."
    exit

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Title: Re: text macro
Post by: zooba on March 19, 2007, 07:30:51 AM

What MichaelW has posted should work fine.

To get around the problem of calling it within a procedure, you can use a different (named) segment:

Code Select

defpp MACRO tag:REQ
      LOCAL pname
      LOCAL qtag                      ;; this just for test

.code AUTO_FUNCTIONS                  ;; new line here
      pname CATSTR <aaa>,<tag>,<bbb>
      qtag  CATSTR <">,<tag>,<">      ;; this just for test
;;      jmp @F                        ;; don't need this line anymore
      pname proc
        print %qtag,13,10             ;; this just for test
        ret
      pname endp
;;    @@:                             ;; don't need this line anymore
.code                                 ;; new line here
      EXITM <OFFSET pname>
ENDM

You don't need to refer to the segment by name at all, it will (should) just work (I haven't tested this particular case, but I have used this technique before). The code will be placed in a second segment within your executable, which may increase the overall size, depending on whether the linker merges the sections or not.

Cheers,

Zooba :U

Title: Re: text macro
Post by: korte on March 19, 2007, 09:20:15 AM

sorry litle english. (reading ok, but not write question)

My problem.
Procedure already define, i want only dword pointer.
like:
dd offset aaaXXXbbb

I want to define only "XXX" string.
XXX ~ object name aaa...bbb method

I writing
definemacro "XXX"
definemacro "YYY"

want to output
dd offset aaaXXXbbb
dd offset aaaYYYbbb

thanks

Title: Re: text macro
Post by: zooba on March 19, 2007, 09:54:34 AM

In that case:

Code Select

definemacro MACRO tag
    dd offset aaa&tag&bbb
ENDM

Cheers,

Zooba :U

Title: Re: text macro
Post by: korte on March 19, 2007, 10:00:44 AM

thx zooba very simple and nice

and also thanks MichaelW

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General Forums => The Campus => Topic started by: korte on March 18, 2007, 10:16:00 PM