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From: Mark Brown <broonie@kernel.org>
To: Peter Collingbourne <pcc@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
	Will Deacon <will@kernel.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Andrey Konovalov <andreyknvl@gmail.com>,
	Evgenii Stepanov <eugenis@google.com>,
	Ard Biesheuvel <ardb@kernel.org>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v5 2/3] arm64: stacktrace: Relax frame record alignment requirement to 8 bytes
Date: Thu, 13 May 2021 18:06:24 +0100	[thread overview]
Message-ID: <20210513170624.GE5813@sirena.org.uk> (raw)
In-Reply-To: <20210513165427.1133795-2-pcc@google.com>


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On Thu, May 13, 2021 at 09:54:26AM -0700, Peter Collingbourne wrote:
> The AAPCS places no requirements on the alignment of the frame
> record. In theory it could be placed anywhere, although it seems
> sensible to require it to be aligned to 8 bytes. With an upcoming
> enhancement to tag-based KASAN Clang will begin creating frame records
> located at an address that is only aligned to 8 bytes. Accommodate
> such frame records in the stack unwinding code.

Reviewed-by: Mark Brown <broonie@kernel.org>

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  reply	other threads:[~2021-05-13 17:09 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-13 16:54 [PATCH v5 1/3] arm64: Change the on_*stack functions to take a size argument Peter Collingbourne
2021-05-13 16:54 ` [PATCH v5 2/3] arm64: stacktrace: Relax frame record alignment requirement to 8 bytes Peter Collingbourne
2021-05-13 17:06   ` Mark Brown [this message]
2021-05-13 16:54 ` [PATCH v5 3/3] kasan: arm64: support specialized outlined tag mismatch checks Peter Collingbourne

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