Re: [PATCH v10 23/40] arm64/signal: Set up and restore the GCS context for signal handlers

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To: Dave Martin <Dave.Martin@xxxxxxx>
Subject: Re: [PATCH v10 23/40] arm64/signal: Set up and restore the GCS context for signal handlers
From: Mark Brown <broonie@xxxxxxxxxx>
Date: Thu, 15 Aug 2024 15:45:45 +0100
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>, Will Deacon <will@xxxxxxxxxx>, Jonathan Corbet <corbet@xxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Marc Zyngier <maz@xxxxxxxxxx>, Oliver Upton <oliver.upton@xxxxxxxxx>, James Morse <james.morse@xxxxxxx>, Suzuki K Poulose <suzuki.poulose@xxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, Oleg Nesterov <oleg@xxxxxxxxxx>, Eric Biederman <ebiederm@xxxxxxxxxxxx>, Shuah Khan <shuah@xxxxxxxxxx>, "Rick P. Edgecombe" <rick.p.edgecombe@xxxxxxxxx>, Deepak Gupta <debug@xxxxxxxxxxxx>, Ard Biesheuvel <ardb@xxxxxxxxxx>, Szabolcs Nagy <Szabolcs.Nagy@xxxxxxx>, Kees Cook <kees@xxxxxxxxxx>, "H.J. Lu" <hjl.tools@xxxxxxxxx>, Paul Walmsley <paul.walmsley@xxxxxxxxxx>, Palmer Dabbelt <palmer@xxxxxxxxxxx>, Albert Ou <aou@xxxxxxxxxxxxxxxxx>, Florian Weimer <fweimer@xxxxxxxxxx>, Christian Brauner <brauner@xxxxxxxxxx>, Thiago Jung Bauermann <thiago.bauermann@xxxxxxxxxx>, Ross Burton <ross.burton@xxxxxxx>, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-doc@xxxxxxxxxxxxxxx, kvmarm@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-kselftest@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-riscv@xxxxxxxxxxxxxxxxxxx
In-reply-to: <Zr4EkmtUKop9o9wu@e133380.arm.com>

On Thu, Aug 15, 2024 at 02:37:22PM +0100, Dave Martin wrote:

> Is there a test for taking and returning from a signal on an alternate
> (main) stack, when a shadow stack is in use?  Sounds like something
> that would be good to check if not.

Not specifically for any of the architectures.

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Follow-Ups:
- Re: [PATCH v10 23/40] arm64/signal: Set up and restore the GCS context for signal handlers
  - From: Dave Martin

References:
- [PATCH v10 00/40] arm64/gcs: Provide support for GCS in userspace
  - From: Mark Brown
- [PATCH v10 23/40] arm64/signal: Set up and restore the GCS context for signal handlers
  - From: Mark Brown
- Re: [PATCH v10 23/40] arm64/signal: Set up and restore the GCS context for signal handlers
  - From: Dave Martin
- Re: [PATCH v10 23/40] arm64/signal: Set up and restore the GCS context for signal handlers
  - From: Mark Brown
- Re: [PATCH v10 23/40] arm64/signal: Set up and restore the GCS context for signal handlers
  - From: Dave Martin

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