From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ABA81C43331 for ; Mon, 30 Mar 2020 20:48:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8BB3A20757 for ; Mon, 30 Mar 2020 20:48:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727750AbgC3Usn (ORCPT ); Mon, 30 Mar 2020 16:48:43 -0400 Received: from mga14.intel.com ([192.55.52.115]:45302 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727437AbgC3Usn (ORCPT ); Mon, 30 Mar 2020 16:48:43 -0400 IronPort-SDR: iBR6p2Ln1iJB+JNK89HoTFchtWjRbo0tjzq+iPdMPjZqPOhsFTnveFsMiow5Nq6GLKIZzy7Oec j6Bp8eVD0NOQ== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Mar 2020 13:48:43 -0700 IronPort-SDR: usxkdiDTrwHNijGjSkPCXts+dFxZnxEFj1nqJAohWz/daP23O+qu70YSaEkBDvLx5Z2JbmAJZ7 vVjAIL1txO5Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.72,325,1580803200"; d="scan'208";a="448412210" Received: from plachner-mobl.ger.corp.intel.com (HELO localhost) ([10.252.35.129]) by fmsmga005.fm.intel.com with ESMTP; 30 Mar 2020 13:48:40 -0700 Date: Mon, 30 Mar 2020 23:48:39 +0300 From: Jarkko Sakkinen To: Sean Christopherson Cc: Nathaniel McCallum , Cedric Xing , Jethro Beekman , Andy Lutomirski , linux-sgx@vger.kernel.org Subject: Re: [PATCH for_v29 v2 0/5] x86/sgx: Make vDSO callable from C Message-ID: <20200330204839.GH1384380@linux.intel.com> References: <20200330180811.31381-1-sean.j.christopherson@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200330180811.31381-1-sean.j.christopherson@intel.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo Sender: linux-sgx-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sgx@vger.kernel.org On Mon, Mar 30, 2020 at 11:08:06AM -0700, Sean Christopherson wrote: > Nathaniel pointed out that __vdso_sgx_enter_enclave() is tantalizingly > close to being callable from C (with caveats and a cooperative enclave). > The missing pieces are preserving %rbx and taking @leaf as a standard > parameter. > > v2: > - Rebase to Jarkko's latest master, commit 402fb35a477a, "docs: ...") > - Add CFI directive for RBX. [Cedric] I'm sorry for throwing stick's constantly but I think having a real ELF loader is for better. /Jarkko