Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers
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Date: Thu, 16 Jan 2020 10:14:24 -0800
From: Sami Tolvanen <samitolvanen@...gle.com>
To: Will Deacon <will@...nel.org>
Cc: Catalin Marinas <catalin.marinas@....com>, Steven Rostedt <rostedt@...dmis.org>, 
	Masami Hiramatsu <mhiramat@...nel.org>, Ard Biesheuvel <ard.biesheuvel@...aro.org>, 
	Mark Rutland <mark.rutland@....com>, Dave Martin <Dave.Martin@....com>, 
	Kees Cook <keescook@...omium.org>, Laura Abbott <labbott@...hat.com>, 
	Marc Zyngier <maz@...nel.org>, Nick Desaulniers <ndesaulniers@...gle.com>, Jann Horn <jannh@...gle.com>, 
	Miguel Ojeda <miguel.ojeda.sandonis@...il.com>, 
	Masahiro Yamada <yamada.masahiro@...ionext.com>, 
	clang-built-linux <clang-built-linux@...glegroups.com>, 
	Kernel Hardening <kernel-hardening@...ts.openwall.com>, 
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 12/15] arm64: vdso: disable Shadow Call Stack

On Thu, Jan 16, 2020 at 9:46 AM Will Deacon <will@...nel.org> wrote:
> Should we be removing -ffixed-x18 too, or does that not propagate here
> anyway?

No, we shouldn't touch -ffixed-x18 here. The vDSO is always built with
x18 reserved since commit 98cd3c3f83fbb ("arm64: vdso: Build vDSO with
-ffixed-x18").

Sami

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