linux-kernel - [PATCH v4 48/63] objtool: Unify STACK_FRAME_NON

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Message-ID: <ac05633d7accc0347412d1b9fe08327b31d21e73.1758067943.git.jpoimboe@kernel.org>
Date: Wed, 17 Sep 2025 09:03:56 -0700
From: Josh Poimboeuf <jpoimboe@...nel.org>
To: x86@...nel.org
Cc: linux-kernel@...r.kernel.org,
	Petr Mladek <pmladek@...e.com>,
	Miroslav Benes <mbenes@...e.cz>,
	Joe Lawrence <joe.lawrence@...hat.com>,
	live-patching@...r.kernel.org,
	Song Liu <song@...nel.org>,
	laokz <laokz@...mail.com>,
	Jiri Kosina <jikos@...nel.org>,
	Marcos Paulo de Souza <mpdesouza@...e.com>,
	Weinan Liu <wnliu@...gle.com>,
	Fazla Mehrab <a.mehrab@...edance.com>,
	Chen Zhongjin <chenzhongjin@...wei.com>,
	Puranjay Mohan <puranjay@...nel.org>,
	Dylan Hatch <dylanbhatch@...gle.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH v4 48/63] objtool: Unify STACK_FRAME_NON_STANDARD entry sizes

The C implementation of STACK_FRAME_NON_STANDARD emits 8-byte entries,
whereas the asm version's entries are only 4 bytes.

Make them consistent by converting the asm version to 8-byte entries.

This is much easier than converting the C version to 4-bytes, which
would require awkwardly putting inline asm in a dummy function in order
to pass the 'func' pointer to the asm.

Signed-off-by: Josh Poimboeuf <jpoimboe@...nel.org>
---
 include/linux/objtool.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/objtool.h b/include/linux/objtool.h
index 4fea6a042b28f..b18ab53561c99 100644
--- a/include/linux/objtool.h
+++ b/include/linux/objtool.h
@@ -92,7 +92,7 @@
 
 .macro STACK_FRAME_NON_STANDARD func:req
 	.pushsection .discard.func_stack_frame_non_standard, "aw"
-	.long \func - .
+	.quad \func
 	.popsection
 .endm
 
-- 
2.50.0