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