From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753273AbaCMH2f (ORCPT ); Thu, 13 Mar 2014 03:28:35 -0400 Received: from terminus.zytor.com ([198.137.202.10]:33556 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751394AbaCMH2c (ORCPT ); Thu, 13 Mar 2014 03:28:32 -0400 Date: Thu, 13 Mar 2014 00:28:07 -0700 From: tip-bot for Jean Pihet Message-ID: Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org, will.deacon@arm.com, acme@ghostprotocols.net, jean.pihet@linaro.org, jolsa@redhat.com, tglx@linutronix.de Reply-To: mingo@kernel.org, hpa@zytor.com, linux-kernel@vger.kernel.org, will.deacon@arm.com, acme@ghostprotocols.net, jean.pihet@linaro.org, jolsa@redhat.com, tglx@linutronix.de In-Reply-To: <1391451509-31265-4-git-send-email-jean.pihet@linaro.org> References: <1391451509-31265-4-git-send-email-jean.pihet@linaro.org> To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] ARM64, perf: Support dwarf unwinding in compat mode Git-Commit-ID: 5aa158b708b07bab47147aa164e3948e8a4c548f X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 5aa158b708b07bab47147aa164e3948e8a4c548f Gitweb: http://git.kernel.org/tip/5aa158b708b07bab47147aa164e3948e8a4c548f Author: Jean Pihet AuthorDate: Mon, 3 Feb 2014 19:18:29 +0100 Committer: Ingo Molnar CommitDate: Wed, 12 Mar 2014 13:45:30 +0100 ARM64, perf: Support dwarf unwinding in compat mode Add support for unwinding using the dwarf information in compat mode. Using the correct user stack pointer allows perf to record the frames correctly in the native and compat modes. Note that although the dwarf frame unwinding works ok using libunwind in native mode (on ARMv7 & ARMv8), some changes are required to the libunwind code for the compat mode. Those changes are posted separately on the libunwind mailing list. Tested on ARMv8 platform with v8 and compat v7 binaries, the latter are statically built. Signed-off-by: Jean Pihet Acked-by: Will Deacon Cc: Arnaldo Cc: Jiri Olsa Cc: patches@linaro.org Cc: linaro-kernel@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1391451509-31265-4-git-send-email-jean.pihet@linaro.org Signed-off-by: Ingo Molnar --- arch/arm64/include/asm/compat.h | 2 +- arch/arm64/include/asm/ptrace.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h index fda2704..e71f81f 100644 --- a/arch/arm64/include/asm/compat.h +++ b/arch/arm64/include/asm/compat.h @@ -228,7 +228,7 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr) return (u32)(unsigned long)uptr; } -#define compat_user_stack_pointer() (current_pt_regs()->compat_sp) +#define compat_user_stack_pointer() (user_stack_pointer(current_pt_regs())) static inline void __user *arch_compat_alloc_user_space(long len) { diff --git a/arch/arm64/include/asm/ptrace.h b/arch/arm64/include/asm/ptrace.h index fbb0020..86d5b54 100644 --- a/arch/arm64/include/asm/ptrace.h +++ b/arch/arm64/include/asm/ptrace.h @@ -133,7 +133,7 @@ struct pt_regs { (!((regs)->pstate & PSR_F_BIT)) #define user_stack_pointer(regs) \ - ((regs)->sp) + (!compat_user_mode(regs)) ? ((regs)->sp) : ((regs)->compat_sp) /* * Are the current registers suitable for user mode? (used to maintain