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 2A0B43851400 for ; Tue, 6 Sep 2022 10:27:22 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 2A0B43851400 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1662460041; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type; bh=2G1VQd6GEkKHFRXHPfvtjEPwAf9uOHpyUxE7HiQuFx4=; b=MA77hxOJaxtA5WWvjWD47b7A3M8a/odnk2m2ehPXofvBexc18iC5eIVVO8pQxkAK/dQ9q9 RKzsUozuA27ND1szbsuyQVu9jqkvELtF9tNgYYe0YCiLNH1Csgds5bmlpaONUAoHFazRb2 xNduiP2z983uK5zDA1wfFdt5Mqz5UEc= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-133-E5npyVdEOZyqQ45NNsftdQ-1; Tue, 06 Sep 2022 06:27:20 -0400 X-MC-Unique: E5npyVdEOZyqQ45NNsftdQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 432F1805AF5 for ; Tue, 6 Sep 2022 10:27:20 +0000 (UTC) Received: from oldenburg.str.redhat.com (unknown [10.39.192.109]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 9F5DC4010E3C for ; Tue, 6 Sep 2022 10:27:19 +0000 (UTC) From: Florian Weimer To: libc-alpha@sourceware.org Subject: [PATCH v2 0/3] Restore support for _r_debug copy relocations & interposition X-From-Line: 564187d57abfb2aa436d2facb6965336fc8e0a4e Mon Sep 17 00:00:00 2001 Message-Id: Date: Tue, 06 Sep 2022 12:27:16 +0200 User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.11.54.2 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-5.0 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_LOW,SPF_HELO_NONE,SPF_NONE,TXREP,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: The previous version used an optimization for symbol lookups that is not valid in the presence of interposition. This version performs a full unversioned symbol lookup with scope traversal instead. This way, an interposing definition in a shared object is picked up as well. Tested on i686-linux-gnu, built with build-many-glibcs.py. Thanks, Florian Florian Weimer (3): elf: Introduce separate _r_debug_array variable elf: Introduce _dl_debug_change_state elf: Restore support for _r_debug interpositions and copy relocations elf/Makefile | 9 +++ elf/dl-close.c | 6 +- elf/dl-debug.c | 144 ++++++++++++++++++++++++++----------- elf/dl-load.c | 6 +- elf/dl-open.c | 5 +- elf/rtld.c | 9 +-- elf/tst-dlmopen4-nonpic.c | 2 + elf/tst-dlmopen4-pic.c | 2 + elf/tst-dlmopen4.c | 22 ++++++ sysdeps/generic/ldsodefs.h | 20 ++++-- 10 files changed, 165 insertions(+), 60 deletions(-) create mode 100644 elf/tst-dlmopen4-nonpic.c create mode 100644 elf/tst-dlmopen4-pic.c base-commit: dbb75513f5cf9285c77c9e55777c5c35b653f890 -- 2.37.2