Re: Concerns about SFrame viability for userspace stack walking

Mark Brown <[email protected]> Thu, 30 Oct 2025 18:45:20 +0000

Newsgroups	org.kernel.vger.linux-toolchains,org.kernel.vger.linux-kernel,org.kernel.vger.linux-perf-users
Message-ID	<[email protected]>

On Thu, Oct 30, 2025 at 11:31:38AM -0700, Andi Kleen wrote:
> On Thu, Oct 30, 2025 at 06:07:49PM +0000, Mark Brown wrote:

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

> Optimizing for the past instead of the future?

On arm64 no currently available hardware has shadow stack support, and
once systems start becoming available it'll take a very long time for
that to filter down to even being all newly shipping systems, let alone
all systems that people care about running new software on.

> Not on x86 at least. All my x86 systems have it, except for a few old
> skylakes.

My experience trying to find a system to test changes on was somewhat
different :(  I did eventually get something.

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