From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B3A0FC38A2A for ; Thu, 7 May 2020 01:05:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9BA1D20747 for ; Thu, 7 May 2020 01:05:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728490AbgEGBFP (ORCPT ); Wed, 6 May 2020 21:05:15 -0400 Received: from mail1.windriver.com ([147.11.146.13]:41706 "EHLO mail1.windriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728049AbgEGBFM (ORCPT ); Wed, 6 May 2020 21:05:12 -0400 Received: from ALA-HCB.corp.ad.wrs.com (ala-hcb.corp.ad.wrs.com [147.11.189.41]) by mail1.windriver.com (8.15.2/8.15.2) with ESMTPS id 04714x0n014145 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL); Wed, 6 May 2020 18:04:59 -0700 (PDT) Received: from pek-lpggp2 (128.224.153.75) by ALA-HCB.corp.ad.wrs.com (147.11.189.41) with Microsoft SMTP Server id 14.3.487.0; Wed, 6 May 2020 18:04:39 -0700 Received: by pek-lpggp2 (Postfix, from userid 20544) id C7017721D10; Thu, 7 May 2020 09:04:08 +0800 (CST) From: Jiping Ma To: , , , CC: , Subject: [PATCH] perf: perf can not parser the backtrace of app with dwarf mode in the 32bit system and 64bit kernel. Date: Thu, 7 May 2020 09:04:08 +0800 Message-ID: <1588813448-161858-1-git-send-email-jiping.ma2@windriver.com> X-Mailer: git-send-email 1.9.1 MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Record PC value from regs[15], it should be regs[32] in REGS_ABI_32 mode, which cause perf parser the backtrace failed. Signed-off-by: Jiping Ma --- arch/arm64/kernel/perf_regs.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm64/kernel/perf_regs.c b/arch/arm64/kernel/perf_regs.c index 0bbac61..04088e6 100644 --- a/arch/arm64/kernel/perf_regs.c +++ b/arch/arm64/kernel/perf_regs.c @@ -32,6 +32,10 @@ u64 perf_reg_value(struct pt_regs *regs, int idx) if ((u32)idx == PERF_REG_ARM64_PC) return regs->pc; + if (perf_reg_abi(current) == PERF_SAMPLE_REGS_ABI_32 + && idx == 15) + return regs->regs[PERF_REG_ARM64_PC]; + return regs->regs[idx]; } -- 1.9.1