Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756354Ab3EAP0w (ORCPT ); Wed, 1 May 2013 11:26:52 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33776 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761469Ab3EAP0r (ORCPT ); Wed, 1 May 2013 11:26:47 -0400 From: Jiri Olsa To: linux-kernel@vger.kernel.org Cc: Jiri Olsa , Thomas Gleixner , "H. Peter Anvin" , Andi Kleen , Oleg Nesterov , Arnaldo Carvalho de Melo , Peter Zijlstra , Ingo Molnar , Paul Mackerras , Corey Ashford , Frederic Weisbecker , Vince Weaver , Stephane Eranian Subject: [PATCH 1/4] signal x86: Propage RF EFLAGS bit throught the signal restore call Date: Wed, 1 May 2013 17:25:41 +0200 Message-Id: <1367421944-19082-2-git-send-email-jolsa@redhat.com> In-Reply-To: <1367421944-19082-1-git-send-email-jolsa@redhat.com> References: <1367421944-19082-1-git-send-email-jolsa@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2714 Lines: 82 Adding RF EFLAGS bit to be restored on return from signal from the original register context before the signal was entered. This will prevent the RF flag to disappear when returning from exception due to the signal handler being executed. Signed-off-by: Jiri Olsa Tested-by: Oleg Nesterov Reviewed-by: Frederic Weisbecker Cc: Thomas Gleixner Cc: H. Peter Anvin Cc: Andi Kleen Cc: Oleg Nesterov Cc: Arnaldo Carvalho de Melo Cc: Peter Zijlstra Cc: Ingo Molnar Cc: Paul Mackerras Cc: Corey Ashford Cc: Frederic Weisbecker Cc: Vince Weaver Cc: Stephane Eranian --- arch/x86/ia32/ia32_signal.c | 2 -- arch/x86/include/asm/sighandling.h | 4 ++-- arch/x86/kernel/signal.c | 6 ------ 3 files changed, 2 insertions(+), 10 deletions(-) diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c index cf1a471..bccfca6 100644 --- a/arch/x86/ia32/ia32_signal.c +++ b/arch/x86/ia32/ia32_signal.c @@ -34,8 +34,6 @@ #include #include -#define FIX_EFLAGS __FIX_EFLAGS - int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from) { int err = 0; diff --git a/arch/x86/include/asm/sighandling.h b/arch/x86/include/asm/sighandling.h index beff97f..7a95816 100644 --- a/arch/x86/include/asm/sighandling.h +++ b/arch/x86/include/asm/sighandling.h @@ -7,10 +7,10 @@ #include -#define __FIX_EFLAGS (X86_EFLAGS_AC | X86_EFLAGS_OF | \ +#define FIX_EFLAGS (X86_EFLAGS_AC | X86_EFLAGS_OF | \ X86_EFLAGS_DF | X86_EFLAGS_TF | X86_EFLAGS_SF | \ X86_EFLAGS_ZF | X86_EFLAGS_AF | X86_EFLAGS_PF | \ - X86_EFLAGS_CF) + X86_EFLAGS_CF | X86_EFLAGS_RF) void signal_fault(struct pt_regs *regs, void __user *frame, char *where); diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c index 6956299..9df4c0b 100644 --- a/arch/x86/kernel/signal.c +++ b/arch/x86/kernel/signal.c @@ -43,12 +43,6 @@ #include -#ifdef CONFIG_X86_32 -# define FIX_EFLAGS (__FIX_EFLAGS | X86_EFLAGS_RF) -#else -# define FIX_EFLAGS __FIX_EFLAGS -#endif - #define COPY(x) do { \ get_user_ex(regs->x, &sc->x); \ } while (0) -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/