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Index > Macroinstructions > [Solved] Macroinstruction argument in label?

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ticamai



Joined: 25 Jun 2014
Posts: 2
ticamai
I'm essentially trying to do the following:

Code:
macro specialprocedure label, flags=0 {
    labeldef equ label
    section '.rodata' data readable
    proc_labeldef: ;The 'labeldef' here needs to be replaced
    db 0xA1
    db flags
labeldef: ;This works properly - labeldef is replaced with what is passed to the macro.
    section '.text' code readable executable
    ;code follows
}

specialprocedure do_the_thing, 0
    xchg eax, eax ;do some super important work!
    ret

_main:
    mov ax, [proc_do_the_thing]
    push ax
    call do_the_thing
    ret
    

I can't figure out how to replace only part of the label name with what I pass to the macro as an argument. In GAS, for example, the macro would look like this:
Code:
.macro specialprocedure label, flags=0
    .rodata
    .globl proc_\label
proc_label:
    .byte 0xA1
    .byte flags
    .globl \label
label:
    section '.text' code readable executable
    ;code follows
.endm
    

Is this possible in FASM? Doing the same as I would in GAS, it ends up placing, for example, 'proc_ do_the_thing:' on the line. Notice the extra space, which causes it not to compile.
Post 25 Jun 2014, 01:55
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17248
Location: In your JS exploiting you and your system
revolution
Use the hash (#):
Code:
proc_#labeldef: ;The 'labeldef' here needs to be replaced    
Post 25 Jun 2014, 02:06
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ticamai



Joined: 25 Jun 2014
Posts: 2
ticamai
revolution, that's exactly what I was looking for. Only now that you mentioned that do I see it in the documentation. Thanks a ton!
Post 25 Jun 2014, 02:10
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