Re: [gas] Label inside macro

[Mike Frysinger <vapier at gentoo dot org>]

On Wednesday, June 08, 2011 15:00:13 Robert Uhl wrote:
> .macro SPRINGBOARD intnr
>      cmpq $0, (counter_running)
>      je dont_count   # interrupt counter disabled
> 
>      push $\intnr
>      call countinterrupt
>      add $8, %rsp    # remove intnr from stack
> 
> dont_count:
>      jmp *(originalhandler + \intnr * 8)
> .align 16
> .endm
> 
> 
> Of course gas complains about the label dont_count:
> "Error: symbol `dont_count' is already defined".
> 
> Is it possible to make the label only visible inside the macro?
> Or is it possible to use the parameter as a label inside the macro?
> 
> I tried already "dont_count_\intr:" and "dont_count_\intr :" as a label
> but gas shows: "Error: invalid character '(' in mnemonic"

David pointed you at the right documentation, but i'll just post an answer 
since ive done more gas macro writing than i care to admit ...

try:
dont_count_\()\intr\():

and if that doesnt work, just use local labels like so:
...
	je 1f;
...
1:
...

unless you have good reason for the symbols showing up in the compiled object, 
i'd suggest you use the latter anyways
-mike

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