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=-15.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1,USER_IN_DEF_DKIM_WL 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 87C0EC4743E for ; Fri, 4 Jun 2021 20:40:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 72ACA613FF for ; Fri, 4 Jun 2021 20:40:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231515AbhFDUmf (ORCPT ); Fri, 4 Jun 2021 16:42:35 -0400 Received: from linux.microsoft.com ([13.77.154.182]:43380 "EHLO linux.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231497AbhFDUme (ORCPT ); Fri, 4 Jun 2021 16:42:34 -0400 Received: from [192.168.254.32] (unknown [47.187.214.213]) by linux.microsoft.com (Postfix) with ESMTPSA id 8ECA920B7188; Fri, 4 Jun 2021 13:40:46 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 8ECA920B7188 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1622839247; bh=UQyAxgPBVDlrjRRR30V2twGCDYKAC5fbsNqtB1zrWOc=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=OOxTQYXouew83Kos/4G5y3PfoVPLC5YX/FeE6mOPw6znDtPEnxCPGwse2T89nZq61 2iot+grdfC4QSU4jmWjIyozMGHk3v5oOvxGlAX1ef0QVuP57c/B/CtY0z+iUGNtnbD OT0CCjH0WEP7j7iUbiscoDSC75e7yarYXwNYq6sE= Subject: Re: [RFC PATCH v5 2/2] arm64: Create a list of SYM_CODE functions, check return PC against list To: Mark Brown Cc: mark.rutland@arm.com, jpoimboe@redhat.com, ardb@kernel.org, nobuta.keiya@fujitsu.com, catalin.marinas@arm.com, will@kernel.org, jmorris@namei.org, pasha.tatashin@soleen.com, jthierry@redhat.com, linux-arm-kernel@lists.infradead.org, live-patching@vger.kernel.org, linux-kernel@vger.kernel.org References: <20210526214917.20099-3-madvenka@linux.microsoft.com> <20210604165945.GA39381@sirena.org.uk> From: "Madhavan T. Venkataraman" Message-ID: <39a46b62-7890-e952-3d77-756a53783176@linux.microsoft.com> Date: Fri, 4 Jun 2021 15:40:45 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: <20210604165945.GA39381@sirena.org.uk> Content-Type: text/plain; charset=windows-1252 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 6/4/21 11:59 AM, Mark Brown wrote: > On Wed, May 26, 2021 at 04:49:17PM -0500, madvenka@linux.microsoft.com wrote: > >> + * - return_to_handler() is handled by the unwinder by attempting to >> + * retrieve the original return address from the per-task return >> + * address stack. >> + * >> + * - kretprobe_trampoline() can be handled in a similar fashion by >> + * attempting to retrieve the original return address from the per-task >> + * kretprobe instance list. >> + * >> + * - I reckon optprobes can be handled in a similar fashion in the future? > > Note that there's a patch for optprobes on the list now: > > https://lore.kernel.org/r/1622803839-27354-1-git-send-email-liuqi115@huawei.com Yes. I saw that. Madhavan 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=-6.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 8354FC4743C for ; Fri, 4 Jun 2021 20:42:28 +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 4A561613FF for ; Fri, 4 Jun 2021 20:42:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4A561613FF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.microsoft.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date: Message-ID:From:References:Cc:To:Subject:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=T6UZp3fmCoL6kVZqc/yaUDoiifbU7AIvENjbfal7TrE=; b=PTanz5q7CLCwMc2QxFhn8Adw1q A0gLdseky19ZTSl+NEXO4d/9Y5+v1aRnSekWHdb5BO4spg6f0uPbTR8/3Ggu0MKV0O3a2aSMv8QBt 3jUqdfBdXeUCiUdyPvwRG5hdShLctulJt/1dyhnPpq0kL4/p5lN50py1QryHLiQjaKPMknL6GeAth 0pl7q90i7iQkblTzJxzgisbdNBDA1Zz7Fqcij8USVoSRKQO9ODPaG3Tim2AcQnR6I3iUz8/NIGr14 9GblUbdVG9A7AoRshIIxv+Mn5N33/mWrlFzpZbEGox7wJQtnPua6EQr0jIGqhCZGSDIhne90SuARU wiHKdsrg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1lpGcd-00F8XL-18; Fri, 04 Jun 2021 20:40:51 +0000 Received: from linux.microsoft.com ([13.77.154.182]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1lpGcZ-00F8WS-Sl for linux-arm-kernel@lists.infradead.org; Fri, 04 Jun 2021 20:40:49 +0000 Received: from [192.168.254.32] (unknown [47.187.214.213]) by linux.microsoft.com (Postfix) with ESMTPSA id 8ECA920B7188; Fri, 4 Jun 2021 13:40:46 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 8ECA920B7188 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1622839247; bh=UQyAxgPBVDlrjRRR30V2twGCDYKAC5fbsNqtB1zrWOc=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=OOxTQYXouew83Kos/4G5y3PfoVPLC5YX/FeE6mOPw6znDtPEnxCPGwse2T89nZq61 2iot+grdfC4QSU4jmWjIyozMGHk3v5oOvxGlAX1ef0QVuP57c/B/CtY0z+iUGNtnbD OT0CCjH0WEP7j7iUbiscoDSC75e7yarYXwNYq6sE= Subject: Re: [RFC PATCH v5 2/2] arm64: Create a list of SYM_CODE functions, check return PC against list To: Mark Brown Cc: mark.rutland@arm.com, jpoimboe@redhat.com, ardb@kernel.org, nobuta.keiya@fujitsu.com, catalin.marinas@arm.com, will@kernel.org, jmorris@namei.org, pasha.tatashin@soleen.com, jthierry@redhat.com, linux-arm-kernel@lists.infradead.org, live-patching@vger.kernel.org, linux-kernel@vger.kernel.org References: <20210526214917.20099-3-madvenka@linux.microsoft.com> <20210604165945.GA39381@sirena.org.uk> From: "Madhavan T. Venkataraman" Message-ID: <39a46b62-7890-e952-3d77-756a53783176@linux.microsoft.com> Date: Fri, 4 Jun 2021 15:40:45 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: <20210604165945.GA39381@sirena.org.uk> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210604_134047_989423_5D1CF533 X-CRM114-Status: GOOD ( 13.61 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 6/4/21 11:59 AM, Mark Brown wrote: > On Wed, May 26, 2021 at 04:49:17PM -0500, madvenka@linux.microsoft.com wrote: > >> + * - return_to_handler() is handled by the unwinder by attempting to >> + * retrieve the original return address from the per-task return >> + * address stack. >> + * >> + * - kretprobe_trampoline() can be handled in a similar fashion by >> + * attempting to retrieve the original return address from the per-task >> + * kretprobe instance list. >> + * >> + * - I reckon optprobes can be handled in a similar fashion in the future? > > Note that there's a patch for optprobes on the list now: > > https://lore.kernel.org/r/1622803839-27354-1-git-send-email-liuqi115@huawei.com Yes. I saw that. Madhavan _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel