From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnd Bergmann Subject: Re: [PATCH v2 03/31] arm64: Exception handling Date: Thu, 16 Aug 2012 11:54:10 +0000 Message-ID: <201208161154.10891.arnd@arndb.de> References: <1344966752-16102-1-git-send-email-catalin.marinas@arm.com> <201208151303.47743.arnd@arndb.de> <20120816100536.GF31784@mudshark.cambridge.arm.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from moutng.kundenserver.de ([212.227.17.8]:64154 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753858Ab2HPMiD (ORCPT ); Thu, 16 Aug 2012 08:38:03 -0400 In-Reply-To: <20120816100536.GF31784@mudshark.cambridge.arm.com> Sender: linux-arch-owner@vger.kernel.org List-ID: To: Will Deacon Cc: Catalin Marinas , "linux-arch@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" On Thursday 16 August 2012, Will Deacon wrote: > On Wed, Aug 15, 2012 at 02:03:47PM +0100, Arnd Bergmann wrote: > > On Tuesday 14 August 2012, Catalin Marinas wrote: > > > > > +#ifdef CONFIG_AARCH32_EMULATION > > > +#define compat_thumb_mode(regs) \ > > > + (((regs)->pstate & COMPAT_PSR_T_BIT)) > > > +#else > > > +#define compat_thumb_mode(regs) (0) > > > +#endif > > > > The symbol we use on other platforms is CONFIG_COMPAT. I don't think you > > need to have a separate CONFIG_AARCH32_EMULATION > > Using COMPAT does preclude the possibility of doing something like the x32 > ABI later on though. Some other architectures seem to do something similar > (MIPS32_COMPAT, IA32_EMULATION). Ok, fair enough. Arnd From mboxrd@z Thu Jan 1 00:00:00 1970 From: arnd@arndb.de (Arnd Bergmann) Date: Thu, 16 Aug 2012 11:54:10 +0000 Subject: [PATCH v2 03/31] arm64: Exception handling In-Reply-To: <20120816100536.GF31784@mudshark.cambridge.arm.com> References: <1344966752-16102-1-git-send-email-catalin.marinas@arm.com> <201208151303.47743.arnd@arndb.de> <20120816100536.GF31784@mudshark.cambridge.arm.com> Message-ID: <201208161154.10891.arnd@arndb.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thursday 16 August 2012, Will Deacon wrote: > On Wed, Aug 15, 2012 at 02:03:47PM +0100, Arnd Bergmann wrote: > > On Tuesday 14 August 2012, Catalin Marinas wrote: > > > > > +#ifdef CONFIG_AARCH32_EMULATION > > > +#define compat_thumb_mode(regs) \ > > > + (((regs)->pstate & COMPAT_PSR_T_BIT)) > > > +#else > > > +#define compat_thumb_mode(regs) (0) > > > +#endif > > > > The symbol we use on other platforms is CONFIG_COMPAT. I don't think you > > need to have a separate CONFIG_AARCH32_EMULATION > > Using COMPAT does preclude the possibility of doing something like the x32 > ABI later on though. Some other architectures seem to do something similar > (MIPS32_COMPAT, IA32_EMULATION). Ok, fair enough. Arnd