From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 19193 invoked by alias); 5 Jan 2015 16:06:19 -0000 Mailing-List: contact systemtap-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: systemtap-owner@sourceware.org Received: (qmail 19171 invoked by uid 89); 5 Jan 2015 16:06:16 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-3.3 required=5.0 tests=AWL,BAYES_00,SPF_HELO_PASS,SPF_PASS,T_RP_MATCHES_RCVD autolearn=ham version=3.3.2 X-HELO: mx1.redhat.com Received: from mx1.redhat.com (HELO mx1.redhat.com) (209.132.183.28) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES256-GCM-SHA384 encrypted) ESMTPS; Mon, 05 Jan 2015 16:06:14 +0000 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id t05G6BMG014380 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 5 Jan 2015 11:06:12 -0500 Received: from [10.13.129.97] (dhcp129-97.rdu.redhat.com [10.13.129.97]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id t05G6BGK028567; Mon, 5 Jan 2015 11:06:11 -0500 Message-ID: <54AAB673.6040200@redhat.com> Date: Mon, 05 Jan 2015 16:06:00 -0000 From: William Cohen User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: systemtap@sourceware.org, Pratyush Anand , "arm@lists.fedoraproject.org" Subject: arm64 uprobes support showing signs of life Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-IsSubscribed: yes X-SW-Source: 2015-q1/txt/msg00000.txt.bz2 Hi All, Pratyush has been implementing uprobes support for aarch64 and has posted a set of patches (http://comments.gmane.org/gmane.linux.ports.arm.kernel/382237) for review. The really new Linux kernels requires a patch to the systemtap runtime because the f_dentry macro has been removed. With the patched systemtap I was able to run the systemtap testsuite and get some test results exercising the uprobes support: https://web.elastic.org/~dejazilla/viewsummary.php?summary=%3D%27%3C54A9E21C.2080504%40redhat.com%3E%27 There looked to be a localized fixes for plt support to eliminate the unsupported systemtap.base/list.exp plt-* tests. A number of the tests appear to fail because of userspace arguments cannot be found for sdt probes. The uprobe patches still need some refinement. On a number of systemtap "make installcheck" runs the kernel would get stuck spewing out: Unexpected kernel single-step exception at EL1 However, things are looking better for user-space probing on arm64. -Will