From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e23smtp07.au.ibm.com (e23smtp07.au.ibm.com [202.81.31.140]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 104261A09D0 for ; Wed, 10 Dec 2014 04:35:00 +1100 (AEDT) Received: from /spool/local by e23smtp07.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 10 Dec 2014 03:34:59 +1000 Received: from d23relay06.au.ibm.com (d23relay06.au.ibm.com [9.185.63.219]) by d23dlp03.au.ibm.com (Postfix) with ESMTP id B3B343578061 for ; Wed, 10 Dec 2014 04:34:56 +1100 (EST) Received: from d23av01.au.ibm.com (d23av01.au.ibm.com [9.190.234.96]) by d23relay06.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id sB9HYuGb31195390 for ; Wed, 10 Dec 2014 04:34:56 +1100 Received: from d23av01.au.ibm.com (localhost [127.0.0.1]) by d23av01.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id sB9HYtH5012008 for ; Wed, 10 Dec 2014 04:34:56 +1100 From: "Naveen N. Rao" To: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, acme@kernel.org, mpe@ellerman.id.au Subject: [RFC PATCH 4/8] perf probe powerpc: Handle powerpc dot symbols Date: Tue, 9 Dec 2014 23:04:02 +0530 Message-Id: <6e97fb2cf77d91057fdcda0a75c58cfa63a7313c.1418146300.git.naveen.n.rao@linux.vnet.ibm.com> In-Reply-To: References: In-Reply-To: References: List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Fix up various perf aspects related to ppc64's usage of dot functions: - ignore leading '.' when generating event names and when looking for existing events. - use the proper prefix when ignoring SyS symbol lookups. Signed-off-by: Naveen N. Rao --- tools/perf/util/probe-event.c | 8 ++++++++ tools/perf/util/symbol.c | 6 ++++++ 2 files changed, 14 insertions(+) diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index c7e01ef..d465f7c 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -2080,6 +2080,10 @@ static int get_new_event_name(char *buf, size_t len, const char *base, { int i, ret; + /* Skip the leading dot on powerpc */ + if (*base == '.') + base++; + /* Try no suffix */ ret = e_snprintf(buf, len, "%s", base); if (ret < 0) { @@ -2538,6 +2542,10 @@ int del_perf_probe_events(struct strlist *dellist) event = str; } + /* Skip the leading dot on powerpc */ + if (event && *event == '.') + event++; + ret = e_snprintf(buf, 128, "%s:%s", group, event); if (ret < 0) { pr_err("Failed to copy event."); diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 0783311..cc04475 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -137,6 +137,12 @@ static int choose_best_symbol(struct symbol *syma, struct symbol *symb) if (na >= 10 && !strncmp(syma->name, "compat_SyS", 10)) return SYMBOL_B; + /* On powerpc, ignore the dot variants */ + if (na >= 4 && !strncmp(syma->name, ".SyS", 4)) + return SYMBOL_B; + if (na >= 11 && !strncmp(syma->name, ".compat_SyS", 11)) + return SYMBOL_B; + return SYMBOL_A; } -- 2.1.3