From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758462Ab2HIPbL (ORCPT ); Thu, 9 Aug 2012 11:31:11 -0400 Received: from mga14.intel.com ([143.182.124.37]:15213 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758327Ab2HIPbJ (ORCPT ); Thu, 9 Aug 2012 11:31:09 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.77,740,1336374000"; d="scan'208";a="132004034" From: Andi Kleen To: acme@redhat.com Cc: linux-kernel@vger.kernel.org, Andi Kleen , Pekka Enberg Subject: [PATCH] perf, tools: Add description of JIT interface Date: Thu, 9 Aug 2012 08:31:00 -0700 Message-Id: <1344526260-18721-1-git-send-email-andi@firstfloor.org> X-Mailer: git-send-email 1.7.7.6 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andi Kleen Add a description of the JIT interface in the perf symbol resolution code. I reverse engineered the format from the source. Cc: Pekka Enberg Signed-off-by: Andi Kleen --- tools/perf/Documentation/jit-interface.txt | 16 ++++++++++++++++ 1 files changed, 16 insertions(+), 0 deletions(-) create mode 100644 tools/perf/Documentation/jit-interface.txt diff --git a/tools/perf/Documentation/jit-interface.txt b/tools/perf/Documentation/jit-interface.txt new file mode 100644 index 0000000..aa66735 --- /dev/null +++ b/tools/perf/Documentation/jit-interface.txt @@ -0,0 +1,16 @@ +perf supports a simple JIT interface to resolve symbols for dynamic code generated +by a JIT. + +The JIT has to write a /tmp/perf-%d.map (%d = pid of process) file + +This is a text file. + +Each line has the following format, fields separated with spaces. + +START SIZE symbolname + +START and SIZE are hex numbers without 0x +symbolname is the rest of the line, so it could contain special characters. + +The ownership of the file has to match the process. + -- 1.7.7.6