From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2A614C10F27 for ; Tue, 10 Mar 2020 13:36:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F2B8224649 for ; Tue, 10 Mar 2020 13:36:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583847407; bh=PSMIR2DJkNCk3A4RyaEO/6PbNVyHXGDX9vZ34ohavoE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=Otac5lNphh6ZDOTAJ2sG16zyNUlnqU3a+UX0a4ZDyZ43LKdXLlWJjq7HJ9rpWHD8t v+HY1Q6NRXmzFQfAFQnE4wtssaJ55YMIWo9u1nyfLAPvX5KPER4Bktf3gcdGyL58B2 OFTykfKcJ7dpELTKSIt+OJGoR/L3mzXLBJEc/m30= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728179AbgCJNgp (ORCPT ); Tue, 10 Mar 2020 09:36:45 -0400 Received: from foss.arm.com ([217.140.110.172]:35116 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727333AbgCJMm2 (ORCPT ); Tue, 10 Mar 2020 08:42:28 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 177C130E; Tue, 10 Mar 2020 05:42:28 -0700 (PDT) Received: from localhost (unknown [10.37.6.21]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 8D64B3F67D; Tue, 10 Mar 2020 05:42:27 -0700 (PDT) Date: Tue, 10 Mar 2020 12:42:26 +0000 From: Mark Brown To: Catalin Marinas Cc: Will Deacon , Alexander Viro , Paul Elliott , Peter Zijlstra , Yu-cheng Yu , Amit Kachhap , Vincenzo Frascino , Marc Zyngier , Eugene Syromiatnikov , Szabolcs Nagy , "H . J . Lu " , Andrew Jones , Kees Cook , Arnd Bergmann , Jann Horn , Richard Henderson , Kristina =?utf-8?Q?Mart=C5=A1enko?= , Thomas Gleixner , Florian Weimer , Sudakshina Das , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: Re: [PATCH v8 00/11] arm64: Branch Target Identification support Message-ID: <20200310124226.GC4106@sirena.org.uk> References: <20200227174417.23722-1-broonie@kernel.org> <20200306102729.GC2503422@arrakis.emea.arm.com> <20200309210505.GM4101@sirena.org.uk> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="XMCwj5IQnwKtuyBG" Content-Disposition: inline In-Reply-To: <20200309210505.GM4101@sirena.org.uk> X-Cookie: In space, no one can hear you fart. User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --XMCwj5IQnwKtuyBG Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Mon, Mar 09, 2020 at 09:05:05PM +0000, Mark Brown wrote: > On Fri, Mar 06, 2020 at 10:27:29AM +0000, Catalin Marinas wrote: > > Does this series affect uprobes in any way? I.e. can you probe a landing > > pad? > You can't probe a landing pad, uprobes on landing pads will be silently > ignored so the program isn't disrupted, you just don't get the expected > trace from those uprobes. This isn't new with the BTI support since > the landing pads are generally pointer auth instructions, these already > can't be probed regardless of what's going on with this series. It's > already on the list to get sorted. Sorry, I realized thanks to Amit's off-list prompting that I was testing that I was verifying with the wrong kernel binary here (user error since it took me a while to sort out uprobes) so this isn't quite right - you can probe the landing pads with or without this series. --XMCwj5IQnwKtuyBG Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAl5nizEACgkQJNaLcl1U h9CwvAf/ZRKRyzQ70X79x8NhEkUSVp2jprVe6r4y/8/g449xGTTicMDIWQKGeikg Z2v/GrsJ7+EAW4fiTl3dz+srzmuQCLS+67Dk/PwL4G4l8eJKQlBVj8BpiAASUml6 mx3mbdZSIfcRKgz3BbzAsmW6p186TYm1Eh0MAQJhN11goYRuZjs0MNTDwZ0RuvSZ 76rUJVdjbiFhjam1Et05p4G8HDQFKU0QArmyibQtCz1kU9+7affCfVyXFj3bnXx4 qepGxIs1ld2UGb4lZ1BdlDxDpQoaQ+nVPxPRic0loZbovKlASlaSyKuRFl49jYg1 8wHzzFxXeERLY2RJGZxzvae6Fq1zzA== =fbe8 -----END PGP SIGNATURE----- --XMCwj5IQnwKtuyBG--