From eeae7bbb8cbdcc000bb01d02ffa69952a4be8a73 Mon Sep 17 00:00:00 2001
From: Laura Abbott <lauraa@codeaurora.org>
Date: Wed, 25 Jun 2014 15:55:03 -0700
Subject: arm64: Add CONFIG_CC_STACKPROTECTOR

arm64 currently lacks support for -fstack-protector. Add
similar functionality to arm to detect stack corruption.

CRs-Fixed: 673518
Change-Id: Id48cdfbd426ca3d685da9926664208f4ad0d99ac
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
---
 arch/arm64/kernel/process.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'arch/arm64/kernel/process.c')

diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index 0e3a980d0..5c59eadec 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -53,6 +53,12 @@
 #include <asm/mmu_context.h>
 #include <asm/processor.h>
 #include <asm/stacktrace.h>
+#ifdef CONFIG_CC_STACKPROTECTOR
+
+#include <linux/stackprotector.h>
+unsigned long __stack_chk_guard __read_mostly;
+EXPORT_SYMBOL(__stack_chk_guard);
+#endif
 
 extern void arch_reset(char mode, const char *cmd);
 
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