linux-kernel - [PATCH] arm64: kernel: Add module symbols _text,

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Message-Id: <1594283025-4166-1-git-send-email-sanggil2.kim@samsung.com>
Date:   Thu,  9 Jul 2020 17:23:45 +0900
From:   sanggil2.kim@...sung.com
To:     linux-arm-kernel@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org,
        Sanggil Kim <sanggil2.kim@...sung.com>
Subject: [PATCH] arm64: kernel: Add module symbols _text, _etext.

From: Sanggil Kim <sanggil2.kim@...sung.com>

We have a solution to protect kernel code section(autually from _text to
_etext) by not MMU. In order to do this, we have to know the addresses
of _text and _etext at runtime.

Signed-off-by: Sanggil Kim <sanggil2.kim@...sung.com>
---
 arch/arm64/kernel/head.S | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S
index 037421c..09b405e 100644
--- a/arch/arm64/kernel/head.S
+++ b/arch/arm64/kernel/head.S
@@ -1003,3 +1003,6 @@ SYM_FUNC_START_LOCAL(__primary_switch)
 	adrp	x0, __PHYS_OFFSET
 	br	x8
 SYM_FUNC_END(__primary_switch)
+
+EXPORT_SYMBOL(_text)
+EXPORT_SYMBOL(_etext)
-- 
2.7.4