linux-kernel - Re: [RFC PATCH v2 00/17] objtool: Function validation tracing

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Message-ID: <20250924101038.GZ4068168@noisy.programming.kicks-ass.net>
Date: Wed, 24 Sep 2025 12:10:38 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Alexandre Chartre <alexandre.chartre@...cle.com>
Cc: linux-kernel@...r.kernel.org, mingo@...nel.org, jpoimboe@...nel.org
Subject: Re: [RFC PATCH v2 00/17] objtool: Function validation tracing

On Wed, Sep 24, 2025 at 12:08:47PM +0200, Peter Zijlstra wrote:
> On Wed, Sep 24, 2025 at 09:42:06AM +0200, Peter Zijlstra wrote:
> 
> > > >   d051:  perf_get_x86_pmu_capability+0x51    | xchg   %ax,%ax                                          
> 
> That libopcode is 'funny', isn't that typically spelled "nop" ?

Ooh, I see, it is "osp nop" and yeah binutils also seems to do that as
"xchg %ax,%ax".