linux-hardening - Re: [PATCH] [PATCH] AARCH64: Add gcc Shadow Call Stack support

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Message-ID: <CANiq72nhu+CtYYNfWLYxf19OscoEEZj=TATM0SHNU8ic1iDhyQ@mail.gmail.com>
Date:   Tue, 22 Feb 2022 17:59:29 +0100
From:   Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Nathan Chancellor <nathan@...nel.org>,
        Dan Li <ashimida@...ux.alibaba.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mark Rutland <mark.rutland@....com>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Nicholas Piggin <npiggin@...il.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Miguel Ojeda <ojeda@...nel.org>,
        Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
        Marco Elver <elver@...gle.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        llvm@...ts.linux.dev, linux-hardening@...r.kernel.org
Subject: Re: [PATCH] [PATCH] AARCH64: Add gcc Shadow Call Stack support

On Tue, Feb 22, 2022 at 5:48 PM Guenter Roeck <linux@...ck-us.net> wrote:
>
> The point here, I think, is to list the minimum gcc version.
> It is going to be a long time until gcc 12.0 is the minimum version,
> so I think it makes sense to list the minimum version number for
> each compiler here.

Yeah, please list the minimum version (ideally `>=` instead of `>`,
with the actual version where it first appeared). It makes it easy to
then remove things that are not needed anymore when the minimum GCC
version is upgraded.

Cheers,
Miguel