linux-kernel - Re: Concerns about SFrame viability for userspace stack walking

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Message-ID: <bdda89a7-ff60-46b0-8ce3-28ffec1fac2a@sirena.org.uk>
Date: Thu, 30 Oct 2025 18:07:49 +0000
From: Mark Brown <broonie@...nel.org>
To: Andi Kleen <andi@...stfloor.org>
Cc: Peter Zijlstra <peterz@...radead.org>,
	Fangrui Song <maskray@...rceware.org>,
	linux-toolchains@...r.kernel.org, linux-perf-users@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: Concerns about SFrame viability for userspace stack walking

On Thu, Oct 30, 2025 at 10:53:13AM -0700, Andi Kleen wrote:

> IMNSHO the whole sframe effort is misguided because all the major ISAs do have
> shadow stack hardware support now which is generally a better option. 
> It would be better to invest effort in deploying that widely.

It's going to take a *considerable* time for the hardware support to
become standard.

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