linux-kernel - Re: [PATCH v6 22/25] x86/asm: annotate indirect jumps

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Date:   Fri, 23 Oct 2020 11:04:43 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Sami Tolvanen <samitolvanen@...gle.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Jann Horn <jannh@...gle.com>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Will Deacon <will@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Kernel Hardening <kernel-hardening@...ts.openwall.com>,
        linux-arch <linux-arch@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-kbuild <linux-kbuild@...r.kernel.org>,
        kernel list <linux-kernel@...r.kernel.org>,
        linux-pci@...r.kernel.org
Subject: Re: [PATCH v6 22/25] x86/asm: annotate indirect jumps

On Fri, Oct 23, 2020 at 10:48 AM Sami Tolvanen <samitolvanen@...gle.com> wrote:
>
> On Thu, Oct 22, 2020 at 09:25:53AM +0200, Peter Zijlstra wrote:
> > > There's a new linker flag for renaming duplicates:
> > >
> > >   https://sourceware.org/bugzilla/show_bug.cgi?id=26391
> > >
> > > But I guess that doesn't help us now.
> >
> > Well, depends a bit if clang can do it; we only need this for LTO builds
> > for now.
>
> LLD doesn't seem to support -z unique-symbol.

https://github.com/ClangBuiltLinux/linux/issues/1184
-- 
Thanks,
~Nick Desaulniers