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Message-ID: <CABCJKucWusLEaLyq=Dv5pWjxcUX7Q9dL=fSstwNK4eJ_6k33=w@mail.gmail.com>
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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