linux-kernel - [PATCH] kallsyms: ignore ARMv4 thunks along with others

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Date: Wed, 14 Feb 2024 19:19:25 +0100
From: Arnd Bergmann <arnd@...nel.org>
To: Masahiro Yamada <masahiroy@...nel.org>
Cc: Arnd Bergmann <arnd@...db.de>,
	Nathan Chancellor <nathan@...nel.org>,
	Nicolas Schier <nicolas@...sle.eu>,
	Pierre-Clément Tosi <ptosi@...gle.com>,
	Ard Biesheuvel <ardb@...nel.org>,
	linux-kbuild@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] kallsyms: ignore ARMv4 thunks along with others

From: Arnd Bergmann <arnd@...db.de>

lld is now able to build ARMv4 and ARMv4T kernels, which means it can generate
thunks for those that can interfere with kallsyms table generation since
they do not get ignore like the corresponding ARMv5+ ones are:

Inconsistent kallsyms data
Try "make KALLSYMS_EXTRA_PASS=1" as a workaround

Add the missing symbols to the list of ignored symbol prefixes.

Fixes: 5eb6e280432d ("ARM: 9289/1: Allow pre-ARMv5 builds with ld.lld 16.0.0 and newer")
Fixes: efe6e3068067 ("kallsyms: fix nonconverging kallsyms table with lld")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 scripts/mksysmap | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/scripts/mksysmap b/scripts/mksysmap
index 9ba1c9da0a40..c809bf592790 100755
--- a/scripts/mksysmap
+++ b/scripts/mksysmap
@@ -52,6 +52,8 @@ ${NM} -n ${1} | sed >${2} -e "
 / __AArch64ADRPThunk_/d
 
 # arm lld
+/ __ARMv4PILongThunk_/d
+/ __ARMv4PILongBXThunk_/d
 / __ARMV5PILongThunk_/d
 / __ARMV7PILongThunk_/d
 / __ThumbV7PILongThunk_/d
-- 
2.39.2