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: 61950 Delivered-To: patch@linaro.org Received: by 10.112.43.199 with SMTP id y7csp1194596lbl; Mon, 15 Feb 2016 09:24:08 -0800 (PST) X-Received: by 10.140.100.141 with SMTP id s13mr21486172qge.25.1455557048398; Mon, 15 Feb 2016 09:24:08 -0800 (PST) Return-Path: Received: from lists.gnu.org (lists.gnu.org. [2001:4830:134:3::11]) by mx.google.com with ESMTPS id 30si35280464qgt.32.2016.02.15.09.24.08 for (version=TLS1 cipher=AES128-SHA bits=128/128); Mon, 15 Feb 2016 09:24:08 -0800 (PST) Received-SPF: pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 2001:4830:134:3::11 as permitted sender) client-ip=2001:4830:134:3::11; Authentication-Results: mx.google.com; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 2001:4830:134:3::11 as permitted sender) smtp.mailfrom=qemu-devel-bounces+patch=linaro.org@nongnu.org Received: from localhost ([::1]:34526 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aVMsZ-0001dc-Nu for patch@linaro.org; Mon, 15 Feb 2016 12:24:07 -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+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.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 --- linux-user/main.c | 3 ++- linux-user/signal.c | 2 +- 2 files changed, 3 insertions(+), 2 deletions(-) -- 1.9.1 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)