Re: [PATCH] x86: Add .nop directive to assembler

[Michael Matz <matz at suse dot de>]

Hi,

On Wed, 14 Feb 2018, H.J. Lu wrote:

> >> This requires much bigger changes.  Also I like ".not SIZE, LIMIT". 
> >> But if everyone agrees that we should extend .skip, we can do that. 
> >> This may also remove the size limit.
> >
> > If I may chime in, it didn't occur to me before Jan mentioned it, but yes,
> > I also think extending .fill feels more natural.
> >
> 
> No, .fill isn't what we want.

I fat-fingered that one, yes I meant .fill.

> We need to extend
> 
> .skip SIZE , FILL
> 
> So what should FILL look like?

@nop, $nop, %nop?  (I think only 'nop' without prefix would interact with 
uses in macros?  The '@' prefix resembles a prefix for relocations, so 
that might be the natural choice).  Perhaps also 'nop' should be 'anynop' 
or so, to indicate it's not just the single-byte 0x90 filler).


Ciao,
Michael.