linux-kernel - [PATCH 17/29] alpha: Move EXCEPTION_TABLE to RO

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Message-Id: <20190926175602.33098-18-keescook@chromium.org>
Date:   Thu, 26 Sep 2019 10:55:50 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Kees Cook <keescook@...omium.org>,
        Rick Edgecombe <rick.p.edgecombe@...el.com>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Arnd Bergmann <arnd@...db.de>, linux-arch@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-alpha@...r.kernel.org,
        linux-ia64@...r.kernel.org, linux-s390@...r.kernel.org,
        linux-c6x-dev@...ux-c6x.org,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Michal Simek <monstr@...str.eu>, linux-parisc@...r.kernel.org,
        linux-xtensa@...ux-xtensa.org, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 17/29] alpha: Move EXCEPTION_TABLE to RO_DATA segment

The EXCEPTION_TABLE is read-only, so collapse it into RO_DATA.

Signed-off-by: Kees Cook <keescook@...omium.org>
---
 arch/alpha/kernel/vmlinux.lds.S | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/alpha/kernel/vmlinux.lds.S b/arch/alpha/kernel/vmlinux.lds.S
index edc45f45523b..72303827bcb4 100644
--- a/arch/alpha/kernel/vmlinux.lds.S
+++ b/arch/alpha/kernel/vmlinux.lds.S
@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 
 #define EMITS_PT_NOTE
+#define RO_DATA_EXCEPTION_TABLE_ALIGN	16
 
 #include <asm-generic/vmlinux.lds.h>
 #include <asm/thread_info.h>
@@ -35,7 +36,6 @@ SECTIONS
 	_etext = .;	/* End of text section */
 
 	RO_DATA(4096)
-	EXCEPTION_TABLE(16)
 
 	/* Will be freed after init */
 	__init_begin = ALIGN(PAGE_SIZE);
-- 
2.17.1