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 [170.10.129.124]) by sourceware.org (Postfix) with ESMTPS id 9B61A3858C78 for ; Tue, 1 Mar 2022 10:35:16 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 9B61A3858C78 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-627-lF3as2IONOyUsWmUoEhEbg-1; Tue, 01 Mar 2022 05:35:11 -0500 X-MC-Unique: lF3as2IONOyUsWmUoEhEbg-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 9FB591868335; Tue, 1 Mar 2022 10:35:09 +0000 (UTC) Received: from oldenburg.str.redhat.com (unknown [10.39.193.76]) by smtp.corp.redhat.com (Postfix) with ESMTPS id F2CDA2AAA3; Tue, 1 Mar 2022 10:35:07 +0000 (UTC) From: Florian Weimer To: "H.J. Lu" Cc: Rui Ueyama , Andi Kleen , x86-64-abi , Binutils Subject: Re: x86-64: new CET-enabled PLT format proposal References: Date: Tue, 01 Mar 2022 11:35:06 +0100 In-Reply-To: (H. J. Lu's message of "Sun, 27 Feb 2022 07:06:37 -0800") Message-ID: <87sfs2ot9h.fsf@oldenburg.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-6.3 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H5, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_NONE, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: binutils@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Binutils mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 01 Mar 2022 10:35:17 -0000 I do wonder if time is better spent on making symbol binding faster in general, and eliminate the semantic difference between BIND_NOW and lazy binding (like musl has done, albeit in an IFUNC-less context). An example of the current performance issues: ld.so has poor performance characteristics when loading large quantities of .so files I'm not suggesting we bring back prelink. There must be other approaches to make binding go faster. Thanks, Florian