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Date: Thu, 9 Jul 2020 17:23:45 +0900 Message-Id: <1594283025-4166-1-git-send-email-sanggil2.kim@samsung.com> X-Mailer: git-send-email 2.7.4 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrIKsWRmVeSWpSXmKPExsWy7bCmma7mFbZ4g6nvBS02Pb7GanF51xw2 ixdzPzI6MHtsXlLv0bdlFaPH501yAcxROTYZqYkpqUUKqXnJ+SmZeem2St7B8c7xpmYGhrqG lhbmSgp5ibmptkouPgG6bpk5QHuUFMoSc0qBQgGJxcVK+nY2RfmlJakKGfnFJbZKqQUpOQWG hgV6xYm5xaV56XrJ+blWhgYGRqZAlQk5GWv/72AuOM1acWD6RpYGxhssXYycHBICJhKvn91k 7GLk4hAS2MEocbrtOhuE84lR4vjlVVDON0aJDVMfs8K0tHQcgWrZyyhxZNplVriqp99uMYFU sQnISbT8PccIYosIaEhM6XrMDmIzC3hIPF70E6xGWMBRYtmDR2BxFgFViV3/3wGt4+DgFXCX 2LlcFGKZnMTNc53MIPMlBP6zSXyc1wt1hYvE1fnH2CBsYYlXx7ewQ9hSEi/726DscomVDetZ IJpbGCXuLn0H1WAsMetZOyPIMmYBTYn1u/RBTAkBZYkjt1ggzuST6Dj8lx0izCvR0SYE0agm 8W/lNKgLZCSWrljDBGF7SPzduwzsWyGBWImt1w6yTGCUnYUwfwEj4ypGsdSC4tz01GKjAiPk SNrECE47Wm47GKe8/aB3iJGJg/EQowQHs5IIr4Eia7wQb0piZVVqUX58UWlOavEhRlNgcE1k lhJNzgcmvrySeENTIzMzA0tTC1MzIwslcd56xQtxQgLpiSWp2ampBalFMH1MHJxSDUwN7YeE Yy+H/fE0FPsvYs63uir0bQj/dv0vV7bekf57qudnyI7eU6teF6yyf/K2MGR3vu7c1w8Z36eU Xr+oavv7Zc2uYmOvrQKS4gLrNlUHdk0P7+G9N6mkIerl4hqt5DOL56s5mAafWrJ1VQvP9ry6 vb0Gx84yys0zZThit7b3v5XZvtXFy24/4LnuK30gYqk0e/KkP9NKulNmBG26XegzkbFjh/ef VRN97kQGG3V/WvpGatPzbxYb5jDotnQx23TfTN/OtTJ+QafVAi/1STNb0hpZgsvvrN2ixPR/ 0201/d6FWzgZz8zNVH5iFuZ9a4G8L0+Pl9iOe3zRWv9P3Ffo6ppz649H1cLFt7svqgQqsRRn JBpqMRcVJwIAy3eJCsQDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrHJMWRmVeSWpSXmKPExsWy7bCSnK7GFbZ4g0v/BSw2Pb7GanF51xw2 ixdzPzI6MHtsXlLv0bdlFaPH501yAcxRXDYpqTmZZalF+nYJXBlr/+9gLjjNWnFg+kaWBsYb LF2MnBwSAiYSLR1HGLsYuTiEBHYzSrzdNoUVIiEj8envCiYIW1jifssRVoiiL4wSHS3XwbrZ BOQkWv6eYwSxRQQ0JKZ0PWbvYuTgYBbwkji4zBkkLCzgKLHswSN2EJtFQFVi1/93bCAlvALu EjuXi0KMl5O4ea6TeQIjzwJGhlWMkqkFxbnpucWGBYZ5qeV6xYm5xaV56XrJ+bmbGMFBoKW5 g3H7qg96hxiZOBgPMUpwMCuJ8BoossYL8aYkVlalFuXHF5XmpBYfYpTmYFES571RuDBOSCA9 sSQ1OzW1ILUIJsvEwSnVwMTrWp59plvgqsJx3eev3qyQMz+ysJmh2ScmY+1Eqz9tT4QOXnKd +3v2/88Wv5h7H8dGhPTuKFxjay4i2OVj7eaUeK3sF6PTsfiat14f4qoyrx7eU/0y17l+fpHi 3qic1Gy3v1y89Zo3PnT82rmT0+zZ/RmaxsfETB3YXSMCw9dsaRPSD71yaY5Wb4aS1bPK6S95 I3at0egr2eD2rmxe4I6VvHWF6nn+V4Tuz44xf6RWz7lc6Z/0uVcCqX6eQU8strfPe3PW94vy k4rIeYIfDnhzGNwO+ljk3Gx/LVxoo86/Sz/2Mnc28hxjSl/H+HzS8qRlG5kYc/YosIb8eGl8 96uT2Ff32Ut/3lX4u6ZZR4mlOCPRUIu5qDgRAB16vdhxAgAA X-CMS-MailID: 20200709082408epcas2p4369fa8f06a57c7358be38282aae0f501 X-Msg-Generator: CA X-Sendblock-Type: AUTO_CONFIDENTIAL CMS-TYPE: 102P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20200709082408epcas2p4369fa8f06a57c7358be38282aae0f501 References: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200709_042419_174994_43D58C50 X-CRM114-Status: GOOD ( 15.81 ) X-Spam-Score: -5.2 (-----) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-5.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [203.254.224.24 listed in list.dnswl.org] 0.0 RCVD_IN_MSPIKE_H3 RBL: Good reputation (+3) [203.254.224.24 listed in wl.mailspike.net] -0.0 SPF_PASS SPF: sender matches SPF record -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.0 RCVD_IN_MSPIKE_WL Mailspike good senders -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sanggil Kim , linux-kernel@vger.kernel.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Sanggil Kim 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 --- 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)