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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 C40ADC169C4 for ; Thu, 31 Jan 2019 07:02:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9B749218AF for ; Thu, 31 Jan 2019 07:02:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548918175; bh=s4CaE8psmKGL/uMXQ0ERjCNJpjSktaYbVaR1plhdlyM=; h=From:To:Cc:Subject:Date:List-ID:From; b=Mi5xbMnYSDb7XnlSDVugNdwhNOsFntb1li9dByJ7na3rX/d+jmozSulfJsR6IJMzj M78FvCFtF203v294AnJ/7Qo68Bfd1wIyAabuwA61q17t/bJnJoxxrxCcuScMXM1m2j Ih2+GROoMbIprGM8OxHXXoXq2p/BHg0WgKnL5QSg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731365AbfAaHCy (ORCPT ); Thu, 31 Jan 2019 02:02:54 -0500 Received: from mail.kernel.org ([198.145.29.99]:60180 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725963AbfAaHCx (ORCPT ); Thu, 31 Jan 2019 02:02:53 -0500 Received: from localhost.localdomain (unknown [60.186.218.186]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 9889D218AC; Thu, 31 Jan 2019 07:02:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548918173; bh=s4CaE8psmKGL/uMXQ0ERjCNJpjSktaYbVaR1plhdlyM=; h=From:To:Cc:Subject:Date:From; b=2LYOPeXxIAYQPu5DFb4wHhhBxxrJBCAffNR1l5niUGlFBByxhs1FokNpj6niY1ni9 8t96dKV3xXPsFAatqzXzk5cu7dm4Jzxkt+chhZ3IlMUi0VEHCANj54tfw3v2A8a058 +jjPu1PrWbx4h9gIZnOcNv4ZYBaWRPQgmIvLPoew= From: guoren@kernel.org To: arnd@arndb.de Cc: linux-kernel@vger.kernel.org, guoren@kernel.org, linux-arch@vger.kernel.org, lu.baoquan@intellif.com, Guo Ren Subject: [PATCH] csky: fixup dead loop in show_stack Date: Thu, 31 Jan 2019 15:02:42 +0800 Message-Id: <1548918162-2728-1-git-send-email-guoren@kernel.org> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Guo Ren When STACKTRACE is enabled, we must pass fp as stack for unwind, otherwise random value in stack will casue a dead loop. Signed-off-by: Guo Ren Reported-by: Lu Baoquan --- arch/csky/kernel/dumpstack.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/csky/kernel/dumpstack.c b/arch/csky/kernel/dumpstack.c index 659253e..d67f977 100644 --- a/arch/csky/kernel/dumpstack.c +++ b/arch/csky/kernel/dumpstack.c @@ -38,7 +38,11 @@ void show_stack(struct task_struct *task, unsigned long *stack) if (task) stack = (unsigned long *)thread_saved_fp(task); else +#ifdef CONFIG_STACKTRACE + asm volatile("mov %0, r8\n":"=r"(stack)::"memory"); +#else stack = (unsigned long *)&stack; +#endif } show_trace(stack); -- 2.7.4