From patchwork Sat Jul 9 10:57:18 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tixy X-Patchwork-Id: 959212 Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by demeter1.kernel.org (8.14.4/8.14.4) with ESMTP id p69B77h8010591 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sat, 9 Jul 2011 11:07:28 GMT Received: from canuck.infradead.org ([2001:4978:20e::1]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1QfVLC-00040V-DE; Sat, 09 Jul 2011 11:04:55 +0000 Received: from localhost ([127.0.0.1] helo=canuck.infradead.org) by canuck.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1QfVLA-0006Fe-7x; Sat, 09 Jul 2011 11:04:52 +0000 Received: from casper.infradead.org ([2001:770:15f::2]) by canuck.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1QfVEY-0004Q1-TE for linux-arm-kernel@canuck.infradead.org; Sat, 09 Jul 2011 10:58:03 +0000 Received: from smarthost02.mail.zen.net.uk ([212.23.3.141]) by casper.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1QfVER-0006Ef-8l for linux-arm-kernel@lists.infradead.org; Sat, 09 Jul 2011 10:58:01 +0000 Received: from [82.69.122.217] (helo=plug1) by smarthost02.mail.zen.net.uk with esmtpsa (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.63) (envelope-from ) id 1QfVEQ-0005j6-7W for linux-arm-kernel@lists.infradead.org; Sat, 09 Jul 2011 10:57:54 +0000 Received: from [192.168.2.20] (helo=computer2) by plug1 with esmtp (Exim 4.72) (envelope-from ) id 1QfVEM-0003hV-JC for linux-arm-kernel@lists.infradead.org; Sat, 09 Jul 2011 11:57:51 +0100 Received: from tixy by computer2 with local (Exim 4.72) (envelope-from ) id 1QfVEM-0005Ua-CH for linux-arm-kernel@lists.infradead.org; Sat, 09 Jul 2011 11:57:50 +0100 From: Tixy To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 31/51] ARM: kprobes: Reject 16-bit Thumb SVC and UNDEFINED instructions Date: Sat, 9 Jul 2011 11:57:18 +0100 Message-Id: <1310209058-20980-32-git-send-email-tixy@yxit.co.uk> X-Mailer: git-send-email 1.7.2.5 In-Reply-To: <1310209058-20980-1-git-send-email-tixy@yxit.co.uk> References: <1310209058-20980-1-git-send-email-tixy@yxit.co.uk> X-Originating-Smarthost02-IP: [82.69.122.217] X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20110709_115756_012231_723707C8 X-CRM114-Status: GOOD ( 14.87 ) X-Spam-Score: -1.9 (-) X-Spam-Report: SpamAssassin version 3.3.2-r929478 on casper.infradead.org summary: Content analysis details: (-1.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [212.23.3.141 listed in list.dnswl.org] -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Sat, 09 Jul 2011 11:07:41 +0000 (UTC) From: Jon Medhurst SVC (SWI) instructions shouldn't occur in kernel code so we don't need to be able to probe them. Signed-off-by: Jon Medhurst --- arch/arm/kernel/kprobes-thumb.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/arch/arm/kernel/kprobes-thumb.c b/arch/arm/kernel/kprobes-thumb.c index e496948..997fc6d 100644 --- a/arch/arm/kernel/kprobes-thumb.c +++ b/arch/arm/kernel/kprobes-thumb.c @@ -464,6 +464,14 @@ const union decode_item kprobe_decode_thumb16_table[] = { /* LDM 1100 1xxx xxxx xxxx */ DECODE_EMULATE (0xf000, 0xc000, t16_emulate_loregs_rwflags), + /* + * Conditional branch, and Supervisor Call + */ + + /* Permanently UNDEFINED 1101 1110 xxxx xxxx */ + /* SVC 1101 1111 xxxx xxxx */ + DECODE_REJECT (0xfe00, 0xde00), + DECODE_END };