From patchwork Sat Oct 25 06:51:04 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wang Nan X-Patchwork-Id: 5151001 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 7141C9F30B for ; Sat, 25 Oct 2014 06:56:12 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id AB4F320220 for ; Sat, 25 Oct 2014 06:56:11 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DCBB62021B for ; Sat, 25 Oct 2014 06:56:10 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XhvEd-0003YJ-Ul; Sat, 25 Oct 2014 06:53:59 +0000 Received: from szxga02-in.huawei.com ([119.145.14.65]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XhvEa-0003O3-1K for linux-arm-kernel@lists.infradead.org; Sat, 25 Oct 2014 06:53:56 +0000 Received: from 172.24.2.119 (EHLO lggeml423-hub.china.huawei.com) ([172.24.2.119]) by szxrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id CBG64392; Sat, 25 Oct 2014 14:52:53 +0800 (CST) Received: from kernel-host.huawei (10.107.197.247) by lggeml423-hub.china.huawei.com (10.72.61.33) with Microsoft SMTP Server id 14.3.158.1; Sat, 25 Oct 2014 14:52:43 +0800 From: Wang Nan To: , Subject: [PATCH v7 1/2] kprobes: copy ainsn after alloc aggr kprobe Date: Sat, 25 Oct 2014 14:51:04 +0800 Message-ID: <1414219865-35988-2-git-send-email-wangnan0@huawei.com> X-Mailer: git-send-email 1.8.4 In-Reply-To: <1414219865-35988-1-git-send-email-wangnan0@huawei.com> References: <1414219865-35988-1-git-send-email-wangnan0@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.107.197.247] X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20141024_235356_252688_CC1AEC75 X-CRM114-Status: UNSURE ( 6.89 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.1 (--) Cc: lizefan@huawei.com, linux@arm.linux.org.uk, taras.kondratiuk@linaro.org, will.deacon@arm.com, linux-kernel@vger.kernel.org, rabin@rab.in, ben.dooks@codethink.co.uk, dave.long@linaro.org, cl@linux.com, davem@davemloft.net, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-3.4 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Copy old kprobe to newly alloced optimized_kprobe before arch_prepare_optimized_kprobe(). Original kprove can brings more information to optimizer. v1 -> v2: - Bugfix: copy p->addr when alloc_aggr_kprobe. Signed-off-by: Wang Nan --- kernel/kprobes.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/kernel/kprobes.c b/kernel/kprobes.c index 3995f54..e9868ec 100644 --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -730,7 +730,13 @@ static struct kprobe *alloc_aggr_kprobe(struct kprobe *p) return NULL; INIT_LIST_HEAD(&op->list); + + /* + * copy gives arch_prepare_optimized_kprobe + * more information + */ op->kp.addr = p->addr; + copy_kprobe(p, &op->kp); arch_prepare_optimized_kprobe(op); return &op->kp;