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=-9.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 9F057C433E1 for ; Wed, 27 May 2020 06:35:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6D9FE207E8 for ; Wed, 27 May 2020 06:35:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=flygoat.com header.i=@flygoat.com header.b="XZ0Zn1op" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728741AbgE0Gfs (ORCPT ); Wed, 27 May 2020 02:35:48 -0400 Received: from vultr.net.flygoat.com ([149.28.68.211]:34432 "EHLO vultr.net.flygoat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725613AbgE0Gfs (ORCPT ); Wed, 27 May 2020 02:35:48 -0400 Received: from localhost.localdomain (unknown [IPv6:2001:da8:20f:4430:250:56ff:fe9a:7470]) by vultr.net.flygoat.com (Postfix) with ESMTPSA id A176620D28; Wed, 27 May 2020 06:35:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=flygoat.com; s=vultr; t=1590561348; bh=8VJCyc5wm9dKhC2IY7gypReS7SA7o6U7AMsatbtINZ8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XZ0Zn1opBlPlBfjOREAlapSbP9ADeBrZfSfMD96IAxVJObeKG8JkmBPu0FEWasWRy 5HuwMrMD2kSToT4+tVgQN963tCamjyLqz0jsPbheM1F0sQ0kxYAdx/tsSMC4cbjHua eZ6FPZjbJhIaJONnfwYRNYuDixbbitMCE87CjRKUP76JeEWWvMuQn3X5mpvxpIBqv+ AlxC74J/sErJX23qeO0d64Mo9C+Rr1u601DWNK995ZUTJXMgwBEduAQMXkZZcBZWyr yG/vINsV8YRySjwA14AR/P7WGVFHUYzM2Rm8PJxbqWYI4IotPTdmGF1p7PdYQbdNVd 67q927/Vw84Bw== From: Jiaxun Yang To: linux-mips@vger.kernel.org Cc: Jiaxun Yang , Thomas Bogendoerfer , Kees Cook , Borislav Petkov , Heiko Carstens , Fangrui Song , linux-kernel@vger.kernel.org Subject: [PATCH v2 2/3] MIPS: Move kernel head into a standalone section Date: Wed, 27 May 2020 14:34:33 +0800 Message-Id: <20200527063438.391949-3-jiaxun.yang@flygoat.com> X-Mailer: git-send-email 2.27.0.rc0 In-Reply-To: <20200527063438.391949-1-jiaxun.yang@flygoat.com> References: <20200527063438.391949-1-jiaxun.yang@flygoat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org That's what already done by Arm64 and other architectures. That would allow us put more things like PE headers safely into the header. Signed-off-by: Jiaxun Yang --- arch/mips/kernel/head.S | 4 ++-- arch/mips/kernel/vmlinux.lds.S | 8 ++++++-- 2 files changed, 8 insertions(+), 4 deletions(-) diff --git a/arch/mips/kernel/head.S b/arch/mips/kernel/head.S index c7c2795837e7..8081a905a71c 100644 --- a/arch/mips/kernel/head.S +++ b/arch/mips/kernel/head.S @@ -59,6 +59,8 @@ #endif .endm + __HEAD +_head: #ifndef CONFIG_NO_EXCEPT_FILL /* * Reserved space for exception handlers. @@ -67,8 +69,6 @@ .fill 0x400 #endif -EXPORT(_stext) - /* * Give us a fighting chance of running if execution beings at the * kernel load address. This is needed because this platform does diff --git a/arch/mips/kernel/vmlinux.lds.S b/arch/mips/kernel/vmlinux.lds.S index f185a85a27c1..b9ace667b82b 100644 --- a/arch/mips/kernel/vmlinux.lds.S +++ b/arch/mips/kernel/vmlinux.lds.S @@ -57,8 +57,12 @@ SECTIONS #endif . = LINKER_LOAD_ADDRESS; /* read-only */ - _text = .; /* Text and read-only data */ - .text : { + .head.text : { + _text = .; + HEAD_TEXT + } + .text : { /* Real text segment */ + _stext = .; /* Text and read-only data */ TEXT_TEXT SCHED_TEXT CPUIDLE_TEXT -- 2.27.0.rc0