From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752334AbaB1OCk (ORCPT ); Fri, 28 Feb 2014 09:02:40 -0500 Received: from mga09.intel.com ([134.134.136.24]:35355 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752292AbaB1OCh (ORCPT ); Fri, 28 Feb 2014 09:02:37 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,562,1389772800"; d="scan'208";a="491576474" From: Andi Kleen To: acme@infradead.org Cc: linux-kernel@vger.kernel.org, Andi Kleen , masami.hiramatsu.pt@hitachi.com Subject: [PATCH 2/2] perf, tools, probe: Clarify x86 register naming for perf probe Date: Fri, 28 Feb 2014 06:02:15 -0800 Message-Id: <1393596135-4227-3-git-send-email-andi@firstfloor.org> X-Mailer: git-send-email 1.8.5.3 In-Reply-To: <1393596135-4227-1-git-send-email-andi@firstfloor.org> References: <1393596135-4227-1-git-send-email-andi@firstfloor.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andi Kleen Clarify how to specify x86 registers in perf probe. I recently ran into this problem and had to figure it out from the source. Cc: masami.hiramatsu.pt@hitachi.com Signed-off-by: Andi Kleen --- tools/perf/Documentation/perf-probe.txt | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt index b715cb7..1513935 100644 --- a/tools/perf/Documentation/perf-probe.txt +++ b/tools/perf/Documentation/perf-probe.txt @@ -136,6 +136,8 @@ Each probe argument follows below syntax. 'NAME' specifies the name of this argument (optional). You can use the name of local variable, local data structure member (e.g. var->field, var.field2), local array with fixed index (e.g. array[1], var->array[0], var->pointer[2]), or kprobe-tracer argument format (e.g. $retval, %ax, etc). Note that the name of this argument will be set as the last member name if you specify a local data structure member (e.g. field2 for 'var->field1.field2'.) 'TYPE' casts the type of this argument (optional). If omitted, perf probe automatically set the type based on debuginfo. You can specify 'string' type only for the local variable or structure member which is an array of or a pointer to 'char' or 'unsigned char' type. +On x86 systems %REG is always the short form of the register: for example %AX. %RAX or %EAX is not valid. + LINE SYNTAX ----------- Line range is described by following syntax. -- 1.8.5.3