[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Wed, 9 Sep 2015 14:31:01 +0100
From: David Vrabel <david.vrabel@...rix.com>
To: Josh Poimboeuf <jpoimboe@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
"H. Peter Anvin" <hpa@...or.com>, <x86@...nel.org>
CC: <linux-kernel@...r.kernel.org>, <live-patching@...r.kernel.org>,
"Michal Marek" <mmarek@...e.cz>,
Peter Zijlstra <peterz@...radead.org>,
"Andy Lutomirski" <luto@...nel.org>,
Borislav Petkov <bp@...en8.de>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Andi Kleen <andi@...stfloor.org>,
"Pedro Alves" <palves@...hat.com>,
Namhyung Kim <namhyung@...il.com>,
"Bernd Petrovitsch" <bernd@...rovitsch.priv.at>,
Chris J Arges <chris.j.arges@...onical.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
Boris Ostrovsky <boris.ostrovsky@...cle.com>
Subject: Re: [PATCH v12 12/21] x86/xen: Add xen_cpuid() and xen_setup_gdt()
to stacktool whitelists
On 09/09/15 14:21, Josh Poimboeuf wrote:
> stacktool reports the following false positive warnings:
>
> stacktool: arch/x86/xen/enlighten.o: xen_cpuid()+0x41: can't find jump dest instruction at .text+0x108
> stacktool: arch/x86/xen/enlighten.o: xen_setup_gdt.constprop.23()+0x2e: kernel entry/exit from callable instruction
>
> The first warning is due to xen_cpuid()'s use of XEN_EMULATE_PREFIX to
> insert some fake instructions which stacktool doesn't know how to
> decode.
>
> The second warning is due to xen_setup_gdt()'s use of an lret
> instruction, which stacktool normally doesn't allow in callable
> functions. But this seems to be a valid use of the instruction.
>
> Add both functions to the stacktool whitelist.
Reviewed-by: David Vrabel <david.vrabel@...rix.com>
David
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists