linux-kernel - [PATCH security-next v5 02/30] vmlinux.lds.h: Avoid copy/paste of security

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Message-Id: <20181011001846.30964-3-keescook@chromium.org>
Date:   Wed, 10 Oct 2018 17:18:18 -0700
From:   Kees Cook <keescook@...omium.org>
To:     James Morris <jmorris@...ei.org>
Cc:     Kees Cook <keescook@...omium.org>,
        Casey Schaufler <casey@...aufler-ca.com>,
        John Johansen <john.johansen@...onical.com>,
        Stephen Smalley <sds@...ho.nsa.gov>,
        Paul Moore <paul@...l-moore.com>,
        Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Mimi Zohar <zohar@...ux.vnet.ibm.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Jordan Glover <Golden_Miller83@...tonmail.ch>,
        LSM <linux-security-module@...r.kernel.org>,
        linux-doc@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH security-next v5 02/30] vmlinux.lds.h: Avoid copy/paste of security_init section

Avoid copy/paste by defining SECURITY_INIT in terms of SECURITY_INITCALL.

Signed-off-by: Kees Cook <keescook@...omium.org>
Reviewed-by: Casey Schaufler <casey@...aufler-ca.com>
Reviewed-by: James Morris <james.morris@...rosoft.com>
Reviewed-by: John Johansen <john.johansen@...onical.com>
---
 include/asm-generic/vmlinux.lds.h | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 7b75ff6e2fce..934a45395547 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -473,13 +473,6 @@
 #define RODATA          RO_DATA_SECTION(4096)
 #define RO_DATA(align)  RO_DATA_SECTION(align)
 
-#define SECURITY_INIT							\
-	.security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
-		__security_initcall_start = .;				\
-		KEEP(*(.security_initcall.init))			\
-		__security_initcall_end = .;				\
-	}
-
 /*
  * .text section. Map to function alignment to avoid address changes
  * during second ld run in second ld pass when generating System.map
@@ -798,6 +791,12 @@
 		KEEP(*(.security_initcall.init))			\
 		__security_initcall_end = .;
 
+/* Older linker script style for security init. */
+#define SECURITY_INIT							\
+	.security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
+		SECURITY_INITCALL					\
+	}
+
 #ifdef CONFIG_BLK_DEV_INITRD
 #define INIT_RAM_FS							\
 	. = ALIGN(4);							\
-- 
2.17.1