From patchwork Wed Feb 11 21:09:00 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnaldo Carvalho de Melo X-Patchwork-Id: 5814541 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id E8708BF440 for ; Wed, 11 Feb 2015 21:12:20 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 106C62021B for ; Wed, 11 Feb 2015 21:12:20 +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 207D3201F2 for ; Wed, 11 Feb 2015 21:12:19 +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 1YLeXb-0006nH-Gj; Wed, 11 Feb 2015 21:09:47 +0000 Received: from mail.kernel.org ([198.145.29.136]) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YLeXX-0006dM-28 for linux-arm-kernel@lists.infradead.org; Wed, 11 Feb 2015 21:09:44 +0000 Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E574D20212; Wed, 11 Feb 2015 21:09:21 +0000 (UTC) Received: from zoo.ghostprotocols.net.ghostprotocols.net (unknown [191.184.42.27]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 618EB20219; Wed, 11 Feb 2015 21:09:17 +0000 (UTC) From: Arnaldo Carvalho de Melo To: Ingo Molnar Subject: [PATCH 06/21] perf symbols: Ignore mapping symbols on aarch64 Date: Wed, 11 Feb 2015 18:09:00 -0300 Message-Id: <1423688955-8094-7-git-send-email-acme@kernel.org> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1423688955-8094-1-git-send-email-acme@kernel.org> References: <1423688955-8094-1-git-send-email-acme@kernel.org> X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150211_130943_126117_28993A6B X-CRM114-Status: GOOD ( 11.46 ) X-Spam-Score: -0.0 (/) Cc: Avi Kivity , Russell King , Peter Zijlstra , Victor Kamensky , Adrian Hunter , linux-kernel@vger.kernel.org, Arnaldo Carvalho de Melo , Paul Mackerras , Anton Blanchard , David Ahern , Masami Hiramatsu , Jiri Olsa , Dave Martin , 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: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Victor Kamensky Aarch64 ELF files use mapping symbols with special names $x, $d to identify regions of Aarch64 code (see Aarch64 ELF ABI - "ARM IHI 0056B", section "4.5.4 Mapping symbols"). The patch filters out these symbols at load time, similar to "696b97a perf symbols: Ignore mapping symbols on ARM" changes done for ARM before V8. Also added handling of mapping symbols that has format "$d." and similar for both cases. Note we are not making difference between EM_ARM and EM_AARCH64 mapping symbols instead code handles superset of both. Signed-off-by: Victor Kamensky Acked-by: Namhyung Kim Acked-by: Will Deacon Cc: Adrian Hunter Cc: Anton Blanchard Cc: Avi Kivity Cc: Dave Martin Cc: David Ahern Cc: Jiri Olsa Cc: linux-arm-kernel@lists.infradead.org Cc: Masami Hiramatsu Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Russell King Link: http://lkml.kernel.org/r/1422340442-4673-2-git-send-email-victor.kamensky@linaro.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/symbol-elf.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c index b24f9d8727a8..225eb73ee78b 100644 --- a/tools/perf/util/symbol-elf.c +++ b/tools/perf/util/symbol-elf.c @@ -859,10 +859,9 @@ int dso__load_sym(struct dso *dso, struct map *map, /* Reject ARM ELF "mapping symbols": these aren't unique and * don't identify functions, so will confuse the profile * output: */ - if (ehdr.e_machine == EM_ARM) { - if (!strcmp(elf_name, "$a") || - !strcmp(elf_name, "$d") || - !strcmp(elf_name, "$t")) + if (ehdr.e_machine == EM_ARM || ehdr.e_machine == EM_AARCH64) { + if (elf_name[0] == '$' && strchr("adtx", elf_name[1]) + && (elf_name[2] == '\0' || elf_name[2] == '.')) continue; }