From: Kees Cook <keescook@chromium.org>
To: Nick Desaulniers <ndesaulniers@google.com>
Cc: Masahiro Yamada <masahiroy@kernel.org>,
Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
clang-built-linux <clang-built-linux@googlegroups.com>,
"maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)"
<x86@kernel.org>, linux-efi <linux-efi@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/2] kbuild: remove cc-option test of -fno-stack-protector
Date: Fri, 26 Jun 2020 13:13:18 -0700 [thread overview]
Message-ID: <202006261312.560B045E@keescook> (raw)
In-Reply-To: <CAKwvOdnK4KZaE=D40UyKHN-nB1Y-oXXJUcVv08cGJNsExOs-Pw@mail.gmail.com>
On Fri, Jun 26, 2020 at 12:09:37PM -0700, Nick Desaulniers wrote:
> On Fri, Jun 26, 2020 at 12:00 PM Masahiro Yamada <masahiroy@kernel.org> wrote:
> > CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \
> > - $(call cc-option, -fno-stack-protector,) \
> > - $(call cc-option, -fno-stack-protector-all,)
> > + -fno-stack-protector $(call cc-option, -fno-stack-protector-all)
>
> Just curious, looks like we could do the same for
> `-fno-stack-protector-all`, here or tree-wide, right? Wait, what
> compiler recognizes -fno-stack-protector-all?
> https://godbolt.org/z/QFQKE_
That is from ancient times, IIRC. -fno-stack-protector should be
sufficient.
--
Kees Cook
next prev parent reply other threads:[~2020-06-26 20:13 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-26 18:59 [PATCH 1/2] kbuild: remove cc-option test of -fno-stack-protector Masahiro Yamada
2020-06-26 18:59 ` [PATCH 2/2] kbuild: remove cc-option test of -ffreestanding Masahiro Yamada
2020-06-26 19:58 ` Nick Desaulniers
2020-06-26 20:22 ` Kees Cook
2020-06-27 7:39 ` Ard Biesheuvel
2020-06-26 19:09 ` [PATCH 1/2] kbuild: remove cc-option test of -fno-stack-protector Nick Desaulniers
2020-06-26 20:00 ` Masahiro Yamada
2020-06-26 20:13 ` Kees Cook [this message]
2020-06-26 20:13 ` Nick Desaulniers
2020-06-26 20:21 ` Kees Cook
2020-06-26 20:25 ` Nick Desaulniers
2020-06-26 20:37 ` Kees Cook
2020-06-27 11:58 ` Masahiro Yamada
2020-06-29 18:26 ` Nick Desaulniers
2020-06-29 22:39 ` Nick Desaulniers
2020-06-30 18:18 ` Masahiro Yamada
2020-07-01 19:33 ` Masahiro Yamada
2020-06-26 20:18 ` Kees Cook
2020-06-27 7:39 ` Ard Biesheuvel
2020-07-01 6:01 ` Marco Elver
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