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From: Nam Cao <namcao@linutronix.de>
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To: Thomas =?utf-8?Q?Wei=C3=9Fschuh?= <thomas.weissschuh@linutronix.de>,
 Paul Walmsley
 <pjw@kernel.org>, Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou
 <aou@eecs.berkeley.edu>, Alexandre Ghiti <alex@ghiti.fr>
Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
 =?utf-8?Q?Thomas_Wei=C3=9Fschuh_=28Schneider_Electric=29?=
 <thomas.weissschuh@linutronix.de>
Subject: Re: [PATCH 0/3] riscv: alternative: Statically compute alternative
 section boundaries and patch compat vDSO
In-Reply-To: <20260630-riscv-vdso32-alternative-v1-0-a32fd89b7b1c@linutronix.de>
References: <20260630-riscv-vdso32-alternative-v1-0-a32fd89b7b1c@linutronix.de>
Date: Thu, 02 Jul 2026 10:12:56 +0200
Message-ID: <87fr21vmgn.fsf@yellow.woof>
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Thomas Wei=C3=9Fschuh <thomas.weissschuh@linutronix.de> writes:
> Currently the alternative sections are extracted from the vDSO
> binaries at runtime. This has runtime overhead and also doesn't
> work for the compat vDSO.
>
> Extract the offsets of the alternative section during the build with the
> existing symbol extraction machinery and use those.
>
> Also add support for the compat vDSO.

Reviewed-by: Nam Cao <namcao@linutronix.de>