linux-kernel - Re: [PATCH 0/3] objtool: retpoline compatibility

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Date:   Thu, 11 Jan 2018 10:22:06 +0000
From:   David Woodhouse <dwmw2@...radead.org>
To:     Josh Poimboeuf <jpoimboe@...hat.com>, x86@...nel.org
Cc:     linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Andi Kleen <ak@...ux.intel.com>, Paul Turner <pjt@...gle.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Greg Kroah-Hartman <gregkh@...ux-foundation.org>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Kees Cook <keescook@...gle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...capital.net>,
        Jiri Kosina <jikos@...nel.org>, gnomes@...rguk.ukuu.org.uk
Subject: Re: [PATCH 0/3] objtool: retpoline compatibility

On Wed, 2018-01-10 at 19:48 -0600, Josh Poimboeuf wrote:
> Make objtool compatible with CONFIG_RETPOLINE and re-enable the
> objtool-dependent features.
> 
> Josh Poimboeuf (3):
>   objtool: Detect jumps to retpoline thunks
>   objtool: Ignore retpoline alternatives
>   Revert "x86/retpoline: Temporarily disable objtool when
>     CONFIG_RETPOLINE=y"
> 
>  arch/x86/Kconfig                     |  4 +--
>  arch/x86/Kconfig.debug               |  6 ++--
>  arch/x86/include/asm/nospec-branch.h | 27 +++++++++++++-
>  tools/objtool/check.c                | 69 ++++++++++++++++++++++++++++++++----
>  tools/objtool/check.h                |  2 +-
>  5 files changed, 95 insertions(+), 13 deletions(-)

Brilliant, thank you. Can you take a look at the latest RSB stuffing
code in http://git.infradead.org/users/dwmw2/linux-retpoline.git/ too
please?

/bin/sh: line 1: 26242 Segmentation fault      (core dumped) ./tools/objtool/objtool orc generate --no-fp "arch/x86/kvm/vmx.o"
Download attachment "smime.p7s" of type "application/x-pkcs7-signature" (5213 bytes)