[PATCH 04/14] arm64: head: Move boot header to .head.data

[Josh Poimboeuf]

The arm64 boot header is mostly data.  Move it to a data section to
prevent objtool and other tools from trying to disassemble it.  The
final linked result is the same.

Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
---
 arch/arm64/kernel/head.S          | 2 +-
 include/asm-generic/vmlinux.lds.h | 2 +-
 include/linux/init.h              | 1 +
 3 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S
index 87a822e5c4ca..0681c6e50859 100644
--- a/arch/arm64/kernel/head.S
+++ b/arch/arm64/kernel/head.S
@@ -54,7 +54,7 @@
  * that are useful before the MMU is enabled. The allocations are described
  * in the entry routines.
  */
-	__HEAD
+	__HEADDATA
 	/*
 	 * DO NOT MODIFY. Image header expected by Linux boot-loaders.
 	 */
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index eeb070f330bd..51a0e5974f41 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -663,7 +663,7 @@
 		__static_call_text_end = .;
 
 /* Section used for early init (in .S files) */
-#define HEAD_TEXT  KEEP(*(.head.text))
+#define HEAD_TEXT  KEEP(*(.head.data .head.text))
 
 #define HEAD_TEXT_SECTION							\
 	.head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {		\
diff --git a/include/linux/init.h b/include/linux/init.h
index 40331923b9f4..91e16f3205e2 100644
--- a/include/linux/init.h
+++ b/include/linux/init.h
@@ -90,6 +90,7 @@
 
 /* For assembly routines */
 #define __HEAD		.section	".head.text","ax"
+#define __HEADDATA	.section	".head.data","aw"
 #define __INIT		.section	".init.text","ax"
 #define __FINIT		.previous
 
-- 
2.53.0