From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753153AbaIFAIG (ORCPT ); Fri, 5 Sep 2014 20:08:06 -0400 Received: from mail-pa0-f44.google.com ([209.85.220.44]:47888 "EHLO mail-pa0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751405AbaIFAG7 (ORCPT ); Fri, 5 Sep 2014 20:06:59 -0400 From: behanw@converseincode.com To: a.ryabinin@samsung.com, anurag19aggarwal@gmail.com, charlebm@gmail.com, cl@linux-foundation.org, dave.long@linaro.org, k.khlebnikov@samsung.com, linux@arm.linux.org.uk, linyongting@gmail.com, Nikolay.Borisov@arm.com, tglx@linutronix.de, tj@kernel.org, u.kleine-koenig@pengutronix.de Cc: behanw@converseincode.com, Dave.Martin@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, rabin@rab.in, rostedt@goodmis.org, rric@kernel.org, will.deacon@arm.com Subject: [PATCH v2 6/7] arm: LLVMLinux: Use current_stack_pointer in unwind_backtrace Date: Fri, 5 Sep 2014 17:06:16 -0700 Message-Id: <1409961977-11762-7-git-send-email-behanw@converseincode.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1409961977-11762-1-git-send-email-behanw@converseincode.com> References: <1409961977-11762-1-git-send-email-behanw@converseincode.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Behan Webster Use the global current_stack_pointer to get the value of the stack pointer. This change supports being able to compile the kernel with both gcc and clang. Signed-off-by: Behan Webster Signed-off-by: Mark Charlebois Reviewed-by: Jan-Simon Möller --- arch/arm/kernel/unwind.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/arm/kernel/unwind.c b/arch/arm/kernel/unwind.c index a61a1df..caea23b 100644 --- a/arch/arm/kernel/unwind.c +++ b/arch/arm/kernel/unwind.c @@ -471,7 +471,6 @@ int unwind_frame(struct stackframe *frame) void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk) { struct stackframe frame; - register unsigned long current_sp asm ("sp"); pr_debug("%s(regs = %p tsk = %p)\n", __func__, regs, tsk); @@ -485,7 +484,7 @@ void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk) frame.pc = regs->ARM_lr; } else if (tsk == current) { frame.fp = (unsigned long)__builtin_frame_address(0); - frame.sp = current_sp; + frame.sp = current_stack_pointer; frame.lr = (unsigned long)__builtin_return_address(0); frame.pc = (unsigned long)unwind_backtrace; } else { -- 1.9.1