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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 067AAC352A2 for ; Wed, 5 Feb 2020 18:21:29 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id CADCB21927 for ; Wed, 5 Feb 2020 18:21:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CADCB21927 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id C6CB16B0083; Wed, 5 Feb 2020 13:20:36 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id C1D7A6B0081; Wed, 5 Feb 2020 13:20:36 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id ABDC06B0085; Wed, 5 Feb 2020 13:20:36 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0235.hostedemail.com [216.40.44.235]) by kanga.kvack.org (Postfix) with ESMTP id 83F466B0081 for ; Wed, 5 Feb 2020 13:20:36 -0500 (EST) Received: from smtpin03.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 267C58248D51 for ; Wed, 5 Feb 2020 18:20:36 +0000 (UTC) X-FDA: 76456888872.03.walk98_7998bfeed242a X-HE-Tag: walk98_7998bfeed242a X-Filterd-Recvd-Size: 3799 Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by imf16.hostedemail.com (Postfix) with ESMTP for ; Wed, 5 Feb 2020 18:20:35 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 05 Feb 2020 10:20:30 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,406,1574150400"; d="scan'208";a="279447843" Received: from yyu32-desk.sc.intel.com ([143.183.136.146]) by FMSMGA003.fm.intel.com with ESMTP; 05 Feb 2020 10:20:29 -0800 From: Yu-cheng Yu To: x86@kernel.org, "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-api@vger.kernel.org, Arnd Bergmann , Andy Lutomirski , Balbir Singh , Borislav Petkov , Cyrill Gorcunov , Dave Hansen , Eugene Syromiatnikov , Florian Weimer , "H.J. Lu" , Jann Horn , Jonathan Corbet , Kees Cook , Mike Kravetz , Nadav Amit , Oleg Nesterov , Pavel Machek , Peter Zijlstra , Randy Dunlap , "Ravi V. Shankar" , Vedvyas Shanbhogue , Dave Martin , x86-patch-review@intel.com Cc: Yu-cheng Yu Subject: [RFC PATCH v9 23/27] ELF: Introduce arch_setup_elf_property() Date: Wed, 5 Feb 2020 10:19:31 -0800 Message-Id: <20200205181935.3712-24-yu-cheng.yu@intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20200205181935.3712-1-yu-cheng.yu@intel.com> References: <20200205181935.3712-1-yu-cheng.yu@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: An ELF file's .note.gnu.property indicates architecture features of the file. These features are extracted earlier and stored in the struct 'arch_elf_state'. Introduce arch_setup_elf_property() to setup and enabl= e these features. The first use-case of this function is Shadow Stack and Indirect Branch Tracking, which are introduced later. Signed-off-by: Yu-cheng Yu --- fs/binfmt_elf.c | 4 ++++ include/linux/elf.h | 6 ++++++ 2 files changed, 10 insertions(+) diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 054446f93442..56fe6cd437fe 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -1213,6 +1213,10 @@ static int load_elf_binary(struct linux_binprm *bp= rm) =20 set_binfmt(&elf_format); =20 + retval =3D arch_setup_elf_property(&arch_state); + if (retval < 0) + goto out; + #ifdef ARCH_HAS_SETUP_ADDITIONAL_PAGES retval =3D arch_setup_additional_pages(bprm, !!interpreter); if (retval < 0) diff --git a/include/linux/elf.h b/include/linux/elf.h index 7bdc6da160c7..81f2161fa4a8 100644 --- a/include/linux/elf.h +++ b/include/linux/elf.h @@ -78,9 +78,15 @@ static inline int arch_parse_elf_property(u32 type, co= nst void *data, { return 0; } + +static inline int arch_setup_elf_property(struct arch_elf_state *arch) +{ + return 0; +} #else extern int arch_parse_elf_property(u32 type, const void *data, size_t da= tasz, bool compat, struct arch_elf_state *arch); +extern int arch_setup_elf_property(struct arch_elf_state *arch); #endif =20 #endif /* _LINUX_ELF_H */ --=20 2.21.0