linux-kernel - Re: [PATCH 2/2] kbuild: remove cc-option test of -ffreestanding

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <202006261322.16A9F14@keescook>
Date:   Fri, 26 Jun 2020 13:22:32 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     linux-kbuild@...r.kernel.org, clang-built-linux@...glegroups.com,
        x86@...nel.org, linux-efi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] kbuild: remove cc-option test of -ffreestanding

On Sat, Jun 27, 2020 at 03:59:13AM +0900, Masahiro Yamada wrote:
> Some Makefiles already pass -ffreestanding unconditionally.
> For example, arch/arm64/lib/Makefile, arch/x86/purgatory/Makefile.
> No problem report so far about hard-coding this option. So, we can
> assume all supported compilers know -ffreestanding.
> 
> I confirmed GCC 4.8 and Clang manuals document this option.
> 
> Get rid of cc-option from -ffreestanding.
> 
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>

Reviewed-by: Kees Cook <keescook@...omium.org>

-- 
Kees Cook