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List:       linux-alpha
Subject:    [PATCH v3 16/29] x86: Move EXCEPTION_TABLE to RO_DATA segment
From:       Kees Cook <keescook () chromium ! org>
Date:       2019-10-29 21:13:38
Message-ID: 20191029211351.13243-17-keescook () chromium ! org
[Download RAW message or body]

The exception table was needlessly marked executable. In preparation
for execute-only memory, move the table into the RO_DATA segment via
the new macro that can be used by any architectures that want to make
a similar consolidation.

Signed-off-by: Kees Cook <keescook@chromium.org>
---
 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..b06d6e1188de 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_EXCEPTION_TABLE_ALIGN	16
 
 #include <asm-generic/vmlinux.lds.h>
 #include <asm/asm-offsets.h>
@@ -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

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