From: Arnd Bergmann <arnd@kernel.org>
To: Masahiro Yamada <masahiroy@kernel.org>, Arnd Bergmann <arnd@arndb.de>
Cc: "Nathan Chancellor" <nathan@kernel.org>,
"Nicolas Schier" <nicolas@fjasle.eu>,
"Pierre-Clément Tosi" <ptosi@google.com>,
"Nick Desaulniers" <ndesaulniers@google.com>,
"Ard Biesheuvel" <ardb@kernel.org>,
"Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>,
linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] [v2] kallsyms: ignore ARMv4 thunks along with others
Date: Thu, 15 Feb 2024 09:32:08 +0100 [thread overview]
Message-ID: <20240215083225.3976252-1-arnd@kernel.org> (raw)
From: Arnd Bergmann <arnd@arndb.de>
lld is now able to build ARMv4 and ARMv4T kernels, which means it can
generate thunks for those (__ARMv4PILongThunk_*, __ARMv4PILongBXThunk_*)
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
Replace the hardcoded list of thunk symbols with a more general regex that
covers this one along with future symbols that follow the same pattern.
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")
Suggested-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
v2: use a regular expression instead of listing each one.
---
scripts/mksysmap | 13 ++-----------
1 file changed, 2 insertions(+), 11 deletions(-)
diff --git a/scripts/mksysmap b/scripts/mksysmap
index 9ba1c9da0a40..57ff5656d566 100755
--- a/scripts/mksysmap
+++ b/scripts/mksysmap
@@ -48,17 +48,8 @@ ${NM} -n ${1} | sed >${2} -e "
/ __kvm_nvhe_\\$/d
/ __kvm_nvhe_\.L/d
-# arm64 lld
-/ __AArch64ADRPThunk_/d
-
-# arm lld
-/ __ARMV5PILongThunk_/d
-/ __ARMV7PILongThunk_/d
-/ __ThumbV7PILongThunk_/d
-
-# mips lld
-/ __LA25Thunk_/d
-/ __microLA25Thunk_/d
+# lld arm/aarch64/mips thunks
+/ __[[:alnum:]]*Thunk_/d
# CFI type identifiers
/ __kcfi_typeid_/d
--
2.39.2
next reply other threads:[~2024-02-15 8:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-15 8:32 Arnd Bergmann [this message]
2024-02-15 9:17 ` [PATCH] [v2] kallsyms: ignore ARMv4 thunks along with others Ard Biesheuvel
2024-02-15 13:45 ` Masahiro Yamada
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