From patchwork Wed May 20 17:55:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Will Deacon X-Patchwork-Id: 11560959 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 76FB413B4 for ; Wed, 20 May 2020 17:56:43 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 36360204EF for ; Wed, 20 May 2020 17:56:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="GRFjc8oa"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="PzAut2nx" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 36360204EF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=Q+IFoPMD0Kil+HCEI+IcIK/pwYfQhjFn6SlVqWJ0nMk=; b=GRFjc8oarnXwAv FI9iZPYGCteThTK0kVje5QBGq+zc0epvtDNGON3XmDGLjRtOUbwhQ5/TlNwfuxNkviLaajc6FXGdG Eq/CNk2YXcA9aR+rq9zxgc5LxUvyWErF8vPAEektQP7K6SOGrStjdjxEfG/sm8HXFo78tRyoDKaxR kKAf2pQ7YKnnMw2QFNwHQ/EnbpYc5M8YhXLUTY7Bq6JIeNeFMwqcYT3KUu4Lxl24rH76nfxMQLecC 1L+BmXCjc9nQnnedJdDQ6hsBceSDgzmpseAdSAgwE8NLyK5wJ0BNH02GdX2XksPkYJ5gXCnQTuNtr gqEM+clV1iaYjt1629Zw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jbSxM-0003ni-47; Wed, 20 May 2020 17:56:40 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jbSwT-0003A9-OH for linux-arm-kernel@lists.infradead.org; Wed, 20 May 2020 17:55:49 +0000 Received: from localhost.localdomain (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id F401B204EF; Wed, 20 May 2020 17:55:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589997345; bh=RjcKzlDRRMdelENucMWCiG1gUt0q7bqy6Vpb7eheWMw=; h=From:To:Cc:Subject:Date:From; b=PzAut2nxmQunc0XXHlPEVPPKKIfzpHOYYPRmzJElJu3qOQDHHsEZiRtHXgu12PYwI pKVasRrndBu++RQyvAlP5CJjgrBd1pyae1S7TafC5aDyaZaBW1qgr36uXN8iDJoYTG vNf/ciorw4Tt9bXpP5iAgqmPm9RyuFn40UrRrULY= From: Will Deacon To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 0/2] arm64 sigreturn unwinding fixes Date: Wed, 20 May 2020 18:55:37 +0100 Message-Id: <20200520175539.28464-1-will@kernel.org> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200520_105545_879579_8687C99D X-CRM114-Status: UNSURE ( 8.67 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -5.2 (-----) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-5.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [198.145.29.99 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Will Deacon , Tamas Zsoldos , Mark Brown , kernel-team@android.com, Dave Martin , Daniel Kiss Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Hi folks, Here is v3 of my attempt at fixing the vdso sigreturn code for unwinders. Previous versions are available here: v1: https://lore.kernel.org/r/20200519121818.14511-1-will@kernel.org v2: https://lore.kernel.org/r/20200519162821.16857-1-will@kernel.org Changes since v2 include: * Fix the .cfi directives to identify the link register correctly * Even more comments Daniel, please can you give this a spin with the LLVM unwinder? It should work this time. Cheers, Will Cc: Dave Martin Cc: Tamas Zsoldos Cc: Daniel Kiss Cc: Mark Brown Cc: --->8 Will Deacon (2): arm64: vdso: Don't prefix sigreturn trampoline with a BTI C instruction arm64: vdso: Fix CFI directives in sigreturn trampoline arch/arm64/include/asm/linkage.h | 6 ++-- arch/arm64/kernel/vdso/sigreturn.S | 51 ++++++++++++++++++++++++---- arch/arm64/kernel/vdso32/sigreturn.S | 19 ++++++----- 3 files changed, 58 insertions(+), 18 deletions(-)