From patchwork Mon Feb 15 17:22:50 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Maydell X-Patchwork-Id: 583040 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id E36161402D8 for ; Tue, 16 Feb 2016 04:23:47 +1100 (AEDT) Received: from localhost ([::1]:34526 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aVMsD-0001dc-Uc for incoming@patchwork.ozlabs.org; Mon, 15 Feb 2016 12:23:45 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57155) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aVMrc-0000Yn-NH for qemu-devel@nongnu.org; Mon, 15 Feb 2016 12:23:09 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aVMrb-0007oj-PG for qemu-devel@nongnu.org; Mon, 15 Feb 2016 12:23:08 -0500 Received: from mnementh.archaic.org.uk ([2001:8b0:1d0::1]:57358) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aVMrb-0007mW-Ja; Mon, 15 Feb 2016 12:23:07 -0500 Received: from pm215 by mnementh.archaic.org.uk with local (Exim 4.84) (envelope-from ) id 1aVMrR-0000xZ-VH; Mon, 15 Feb 2016 17:22:57 +0000 From: Peter Maydell To: qemu-devel@nongnu.org Date: Mon, 15 Feb 2016 17:22:50 +0000 Message-Id: <1455556977-3644-5-git-send-email-peter.maydell@linaro.org> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1455556977-3644-1-git-send-email-peter.maydell@linaro.org> References: <1455556977-3644-1-git-send-email-peter.maydell@linaro.org> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2001:8b0:1d0::1 Cc: "Edgar E. Iglesias" , Sergey Fedorov , qemu-arm@nongnu.org, patches@linaro.org Subject: [Qemu-devel] [PATCH 04/11] linux-user: Use restrictive mask when calling cpsr_write() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org When linux-user code is calling cpsr_write(), use a restrictive mask to ensure we are limiting the set of CPSR bits we update. In particular, don't allow the mode bits to be changed. Signed-off-by: Peter Maydell Reviewed-by: Sergey Fedorov --- linux-user/main.c | 3 ++- linux-user/signal.c | 2 +- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/linux-user/main.c b/linux-user/main.c index 1269470..c467fa7 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -4446,7 +4446,8 @@ int main(int argc, char **argv, char **envp) #elif defined(TARGET_ARM) { int i; - cpsr_write(env, regs->uregs[16], 0xffffffff, CPSRWriteByInstr); + cpsr_write(env, regs->uregs[16], CPSR_USER | CPSR_EXEC, + CPSRWriteByInstr); for(i = 0; i < 16; i++) { env->regs[i] = regs->uregs[i]; } diff --git a/linux-user/signal.c b/linux-user/signal.c index 82f81c7..962111c 100644 --- a/linux-user/signal.c +++ b/linux-user/signal.c @@ -1611,7 +1611,7 @@ setup_return(CPUARMState *env, struct target_sigaction *ka, env->regs[13] = frame_addr; env->regs[14] = retcode; env->regs[15] = handler & (thumb ? ~1 : ~3); - cpsr_write(env, cpsr, 0xffffffff, CPSRWriteByInstr); + cpsr_write(env, cpsr, CPSR_IT | CPSR_T, CPSRWriteByInstr); } static abi_ulong *setup_sigframe_v2_vfp(abi_ulong *regspace, CPUARMState *env)