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Message-ID: <20260513111717.744ab815@inria.fr>
Date: Wed, 13 May 2026 11:17:17 +0200
From: Jₑₙₛ Gustedt <jens.gustedt@...ia.fr>
To: Florian Schmaus <florian.schmaus@...asip.com>
Cc: musl@...ts.openwall.com, dalias@...c.org, tg@...bsd.de
Subject: Re: [PATCH v2] qsort: align 'tmp' buffer to preserve CHERI
capabilities
Florian,
on Wed, 13 May 2026 10:21:46 +0200 you (Florian Schmaus
<florian.schmaus@...asip.com>) wrote:
> ...
> By changing the buffer type to a union with a pointer member we force
> the compiler to align the stack allocation to the architectural
> pointer/capability alignment boundary. This ensures that capabilities
> stored in the buffer retain their tags and remain valid.
wouldn't it be simpler to us `_Alignas`? There seem already some
usages of that feature in musl, so that should not be a problem, I
guess.
Thanks
Jₑₙₛ
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