From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [63.128.21.124]) by sourceware.org (Postfix) with ESMTP id 116863857C71 for ; Thu, 17 Sep 2020 12:59:46 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 116863857C71 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-98-K45D2_NUNo-7NVkpINvG2Q-1; Thu, 17 Sep 2020 08:59:43 -0400 X-MC-Unique: K45D2_NUNo-7NVkpINvG2Q-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id E1EB91081820; Thu, 17 Sep 2020 12:59:41 +0000 (UTC) Received: from oldenburg2.str.redhat.com (ovpn-113-177.ams2.redhat.com [10.36.113.177]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 82DBF2C31E; Thu, 17 Sep 2020 12:59:37 +0000 (UTC) From: Florian Weimer To: Carlos O'Donell Cc: "Daniel Walker (danielwa)" , "libc-alpha@sourceware.org" , Pedro Alves , "Jeremy Stenglein (jstengle)" , "xe-linux-external(mailer list)" Subject: Re: [RFC PATCH 0/3] implement dlmopen hooks for gdb References: <20200626193228.1953-1-danielwa@cisco.com> <0f791d3a-20bc-4524-54eb-ce6df108fbff@redhat.com> <20200723184054.GD9875@zorba> <3ff42e45-b394-bf50-38c4-93baecc71497@redhat.com> <20200916161836.GW7261@zorba> <85ee3ea9-039b-a5db-a84e-224924822c79@redhat.com> Date: Thu, 17 Sep 2020 14:59:35 +0200 In-Reply-To: <85ee3ea9-039b-a5db-a84e-224924822c79@redhat.com> (Carlos O'Donell's message of "Thu, 17 Sep 2020 08:52:47 -0400") Message-ID: <871rj0imo8.fsf@oldenburg2.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-8.0 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H5, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 17 Sep 2020 12:59:47 -0000 * Carlos O'Donell: > You will always have .dynsym with a definition for _r_debug_dlmopen. Note that this doesn't work if you just have a core file. In order to find _r_debug (or _r_debug_dlmopen), a debugger needs the exact same copy of ld.so that was used by the executable, otherwise the symbol cannot be found in the image. Thanks, Florian -- Red Hat GmbH, https://de.redhat.com/ , Registered seat: Grasbrunn, Commercial register: Amtsgericht Muenchen, HRB 153243, Managing Directors: Charles Cachera, Brian Klemm, Laurie Krebs, Michael O'Neill