linux-kernel - Re: [PATCH] x86/build: Move _etext to actual end of .text

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Message-ID: <201906051114.6DEF834@keescook>
Date:   Wed, 5 Jun 2019 11:16:06 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Alec Ari <neotheuser@...il.com>
Cc:     linux-kernel <linux-kernel@...r.kernel.org>, x86@...nel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH] x86/build: Move _etext to actual end of .text

On Wed, Jun 05, 2019 at 11:08:13AM -0500, Alec Ari wrote:
> I'm having this problem too, build is failing:
> 
> Invalid absolute R_X86_64_32S relocation: _etext
> 
> I stayed on the 4.14 branch to help prevent these kind of breakages,
> so much for that idea. Gentoo GCC 8.3.0.

It seems to be a problem with the Gold linker. Using ld.bfd appears to
work. I haven't narrowed down the problem, unfortunately.

Greg, given that this change was only for special situations (Clang
CFI), can you revert this for the stable trees?

-- 
Kees Cook