From patchwork Wed Apr 10 15:50:50 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joe Lawrence X-Patchwork-Id: 10894301 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D4C3F13B5 for ; Wed, 10 Apr 2019 15:52:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BA24228B58 for ; Wed, 10 Apr 2019 15:52:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B810228B5A; Wed, 10 Apr 2019 15:52:00 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 31C3028B62 for ; Wed, 10 Apr 2019 15:52:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727229AbfDJPvy (ORCPT ); Wed, 10 Apr 2019 11:51:54 -0400 Received: from mx1.redhat.com ([209.132.183.28]:45081 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387476AbfDJPvH (ORCPT ); Wed, 10 Apr 2019 11:51:07 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 13E6E6DDD6; Wed, 10 Apr 2019 15:51:06 +0000 (UTC) Received: from jlaw-desktop.bos.redhat.com (dhcp-17-208.bos.redhat.com [10.18.17.208]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8045D1017B2E; Wed, 10 Apr 2019 15:51:04 +0000 (UTC) From: Joe Lawrence To: linux-kernel@vger.kernel.org, live-patching@vger.kernel.org, linux-kbuild@vger.kernel.org Cc: Jessica Yu , Jiri Kosina , Joao Moreira , Joe Lawrence , Josh Poimboeuf , Konstantin Khlebnikov , Masahiro Yamada , Michael Matz , Miroslav Benes , Nicolai Stange , Petr Mladek Subject: [PATCH v3 1/9] livepatch: Create and include UAPI headers Date: Wed, 10 Apr 2019 11:50:50 -0400 Message-Id: <20190410155058.9437-2-joe.lawrence@redhat.com> In-Reply-To: <20190410155058.9437-1-joe.lawrence@redhat.com> References: <20190410155058.9437-1-joe.lawrence@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Wed, 10 Apr 2019 15:51:06 +0000 (UTC) Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Josh Poimboeuf Define klp prefixes in include/uapi/linux/livepatch.h, and use them for replacing hard-coded values in kernel/livepatch/core.c. Update MAINTAINERS. Note: Add defines to uapi as these are also to be used by a newly introduced klp-convert script. Signed-off-by: Josh Poimboeuf Signed-off-by: Joao Moreira Signed-off-by: Joe Lawrence --- MAINTAINERS | 1 + include/linux/livepatch.h | 1 + include/uapi/linux/livepatch.h | 17 +++++++++++++++++ kernel/livepatch/core.c | 4 ++-- 4 files changed, 21 insertions(+), 2 deletions(-) create mode 100644 include/uapi/linux/livepatch.h diff --git a/MAINTAINERS b/MAINTAINERS index 2359e12e4c41..65b4e8f481f0 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -9017,6 +9017,7 @@ R: Joe Lawrence S: Maintained F: kernel/livepatch/ F: include/linux/livepatch.h +F: include/uapi/linux/livepatch.h F: arch/x86/include/asm/livepatch.h F: arch/x86/kernel/livepatch.c F: Documentation/livepatch/ diff --git a/include/linux/livepatch.h b/include/linux/livepatch.h index 53551f470722..16b48e8b29a2 100644 --- a/include/linux/livepatch.h +++ b/include/linux/livepatch.h @@ -25,6 +25,7 @@ #include #include #include +#include #if IS_ENABLED(CONFIG_LIVEPATCH) diff --git a/include/uapi/linux/livepatch.h b/include/uapi/linux/livepatch.h new file mode 100644 index 000000000000..bb86243de805 --- /dev/null +++ b/include/uapi/linux/livepatch.h @@ -0,0 +1,17 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +/* + * livepatch.h - Kernel Live Patching Core + * + * Copyright (C) 2016 Josh Poimboeuf + */ + +#ifndef _UAPI_LIVEPATCH_H +#define _UAPI_LIVEPATCH_H + +#include + +#define KLP_RELA_PREFIX ".klp.rela." +#define KLP_SYM_PREFIX ".klp.sym." + +#endif /* _UAPI_LIVEPATCH_H */ diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c index eb0ee10a1981..3d9ed895b252 100644 --- a/kernel/livepatch/core.c +++ b/kernel/livepatch/core.c @@ -235,7 +235,7 @@ static int klp_resolve_symbols(Elf_Shdr *relasec, struct module *pmod) /* Format: .klp.sym.objname.symname,sympos */ cnt = sscanf(strtab + sym->st_name, - ".klp.sym.%55[^.].%127[^,],%lu", + KLP_SYM_PREFIX "%55[^.].%127[^,],%lu", objname, symname, &sympos); if (cnt != 3) { pr_err("symbol %s has an incorrectly formatted name\n", @@ -281,7 +281,7 @@ static int klp_write_object_relocations(struct module *pmod, * See comment in klp_resolve_symbols() for an explanation * of the selected field width value. */ - cnt = sscanf(secname, ".klp.rela.%55[^.]", sec_objname); + cnt = sscanf(secname, KLP_RELA_PREFIX "%55[^.]", sec_objname); if (cnt != 1) { pr_err("section %s has an incorrectly formatted name\n", secname);