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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 8F4ACC4360C for ; Thu, 26 Sep 2019 18:05:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6B2DF222CC for ; Thu, 26 Sep 2019 18:05:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="YyccQSUv" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728004AbfIZSFW (ORCPT ); Thu, 26 Sep 2019 14:05:22 -0400 Received: from mail-pl1-f195.google.com ([209.85.214.195]:45667 "EHLO mail-pl1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727931AbfIZSFV (ORCPT ); Thu, 26 Sep 2019 14:05:21 -0400 Received: by mail-pl1-f195.google.com with SMTP id u12so1357422pls.12 for ; Thu, 26 Sep 2019 11:05:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=LBq+xea/ZmJQ/9uj4ezLaR0vyHYQneqqBGeQvqqFY5g=; b=YyccQSUv7s3dpyKNfcnsTuVNk/Y6kwXh+M8oxRRtdUgW8nSUtTYRC0g/WriqeXH9y2 wwVCXNxHIivS7mTiFSK+TSyzV+h8hVp4SAUn1izuVQbvw0l7XMGaQM6lK95NH4vmtwbU BZR9POA+VLIcdjNACdsaoN48Vcx862rY58h7Y= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=LBq+xea/ZmJQ/9uj4ezLaR0vyHYQneqqBGeQvqqFY5g=; b=ZmvnPb4k2qPVGr+UjnMdqgY2Odx2EFQF9qLK7EEWXlNykjGqUWUZ+sCflM/kikIL6Z kIXr1WVOXsG4WMidRJuN5Y4B6EOBjjkfkkj0L7470WnIjgqhM1iJu9yQ817u+FfXmyfx QOlFCKeH5RA1fUdWx6BSkaX8q/lQR3Rf6LHwZDjzRhSlLjQXMFNbnDkItI9ANNr4jvHd DQTszApueHoSFmS5jn1ublwd9TN7dCxraJvu+/vzX24sBLYVSOf5MOS+W0tEK0uJBkqD D5nB4D9/+qID+tsDj3X9apgVibR2telWQNzbZss5kgrPJdyqz6cdnIkOyBOlWXqUTCC3 qWDg== X-Gm-Message-State: APjAAAV2pD1RCXUiV22CUda3Q4CPZD9rv7FWL4zSm+fG46Wn2iubFEp5 9YSxwFWwwOtC9qZ/H6YMxzBz7Q== X-Google-Smtp-Source: APXvYqzkn6dvMB+EvQiPjIgquz94zhqgnJASSzAj4vbdHobiWS7v9jA7Bv9z5kMPyHOm+3eNniFkDQ== X-Received: by 2002:a17:902:a618:: with SMTP id u24mr5406606plq.76.1569521121016; Thu, 26 Sep 2019 11:05:21 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id e127sm3746231pfe.37.2019.09.26.11.05.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Sep 2019 11:05:20 -0700 (PDT) From: Kees Cook To: Thomas Gleixner Cc: Kees Cook , Rick Edgecombe , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Dave Hansen , Andy Lutomirski , Arnd Bergmann , linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-alpha@vger.kernel.org, linux-ia64@vger.kernel.org, linux-s390@vger.kernel.org, linux-c6x-dev@linux-c6x.org, Yoshinori Sato , Michal Simek , linux-parisc@vger.kernel.org, linux-xtensa@linux-xtensa.org, x86@kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 16/29] x86: Move EXCEPTION_TABLE to RO_DATA segment Date: Thu, 26 Sep 2019 10:55:49 -0700 Message-Id: <20190926175602.33098-17-keescook@chromium.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190926175602.33098-1-keescook@chromium.org> References: <20190926175602.33098-1-keescook@chromium.org> Sender: linux-parisc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org The exception table was needlessly marked executable. In preparation for execute-only memory, this moves the table into the RO_DATA segment via a new macro that can be used by any architectures that want to make a similar consolidation. Signed-off-by: Kees Cook --- arch/x86/kernel/vmlinux.lds.S | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S index a1a758e25b2b..a5c8571e4967 100644 --- a/arch/x86/kernel/vmlinux.lds.S +++ b/arch/x86/kernel/vmlinux.lds.S @@ -22,6 +22,7 @@ #endif #define EMITS_PT_NOTE +#define RO_DATA_EXCEPTION_TABLE_ALIGN 16 #include #include @@ -145,8 +146,6 @@ SECTIONS #endif } :text = 0x9090 - EXCEPTION_TABLE(16) - /* End of text section, which should occupy whole number of pages */ _etext = .; . = ALIGN(PAGE_SIZE); -- 2.17.1