From: Josh Poimboeuf <jpoimboe@kernel.org>
To: x86@kernel.org
Cc: linux-kernel@vger.kernel.org, live-patching@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>,
Joe Lawrence <joe.lawrence@redhat.com>,
Song Liu <song@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org,
Mark Rutland <mark.rutland@arm.com>,
Nathan Chancellor <nathan@kernel.org>,
Nicolas Schier <nsc@kernel.org>,
Herbert Xu <herbert@gondor.apana.org.au>
Subject: [PATCH v2 02/12] arm64: head: Move boot header to .head.data
Date: Tue, 17 Mar 2026 15:51:02 -0700 [thread overview]
Message-ID: <63e5cf00cb5636d1315754a264ff90175820ec65.1773787568.git.jpoimboe@kernel.org> (raw)
In-Reply-To: <cover.1773787568.git.jpoimboe@kernel.org>
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.
Acked-by: Song Liu <song@kernel.or
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
---
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 1e1580febe4b..f82f170a97eb 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
next prev parent reply other threads:[~2026-03-17 22:51 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-17 22:51 [PATCH v2 00/12] objtool/arm64: Port klp-build to arm64 Josh Poimboeuf
2026-03-17 22:51 ` [PATCH v2 01/12] arm64: Annotate intra-function calls Josh Poimboeuf
2026-03-17 22:51 ` Josh Poimboeuf [this message]
2026-03-17 22:51 ` [PATCH v2 03/12] arm64: Fix EFI linking with -fdata-sections Josh Poimboeuf
2026-03-17 22:51 ` [PATCH v2 04/12] crypto: arm64: Move data to .rodata Josh Poimboeuf
2026-03-17 22:51 ` [PATCH v2 05/12] objtool: Extricate checksum calculation from validate_branch() Josh Poimboeuf
2026-03-17 22:51 ` [PATCH v2 06/12] objtool: Allow setting --mnop without --mcount Josh Poimboeuf
2026-03-17 22:51 ` [PATCH v2 07/12] kbuild: Only run objtool if there is at least one command Josh Poimboeuf
2026-03-18 19:54 ` Nicolas Schier
2026-03-19 0:49 ` Josh Poimboeuf
2026-03-30 18:49 ` Nicolas Schier
2026-03-17 22:51 ` [PATCH v2 08/12] objtool: Ignore jumps to the end of the function for non-CFG arches Josh Poimboeuf
2026-03-17 22:51 ` [PATCH v2 09/12] objtool: Allow empty alternatives Josh Poimboeuf
2026-03-17 22:51 ` [PATCH v2 10/12] objtool: Reuse consecutive string references Josh Poimboeuf
2026-03-17 22:51 ` [PATCH v2 11/12] objtool: Introduce objtool for arm64 Josh Poimboeuf
2026-03-17 22:51 ` [PATCH v2 12/12] klp-build: Support cross-compilation Josh Poimboeuf
2026-03-19 4:13 ` [PATCH v2 00/12] objtool/arm64: Port klp-build to arm64 Josh Poimboeuf
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