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

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Message-ID: <20201110174606.mp5m33lgqksks4mt@treble>
Date:   Tue, 10 Nov 2020 11:46:06 -0600
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Sami Tolvanen <samitolvanen@...gle.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        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>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        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 Mon, Nov 09, 2020 at 08:29:24PM -0600, Josh Poimboeuf wrote:
> On Mon, Nov 09, 2020 at 03:11:41PM -0800, Sami Tolvanen wrote:
> > CONFIG_XEN
> > 
> > __switch_to_asm()+0x0: undefined stack state
> >   xen_hypercall_set_trap_table()+0x0: <=== (sym)

With your branch + GCC 9 I can recreate all the warnings except this
one.

Will do some digging on the others...

-- 
Josh