path: root/scripts/kallsyms.c
diff options
authorArnd Bergmann <arnd@arndb.de>2021-02-04 16:29:47 +0100
committerMasahiro Yamada <masahiroy@kernel.org>2021-02-05 17:53:28 +0900
commitefe6e3068067212b85c2d0474b5ee3b2d0c7adab (patch)
treeefaecdd25c5be7b07e93f503678ec77915f471e0 /scripts/kallsyms.c
parentkbuild: fix duplicated flags in DEBUG_CFLAGS (diff)
kallsyms: fix nonconverging kallsyms table with lld
ARM randconfig builds with lld sometimes show a build failure from kallsyms: Inconsistent kallsyms data Try make KALLSYMS_EXTRA_PASS=1 as a workaround The problem is the veneers/thunks getting added by the linker extend the symbol table, which in turn leads to more veneers being needed, so it may take a few extra iterations to converge. This bug has been fixed multiple times before, but comes back every time a new symbol name is used. lld uses a different set of identifiers from ld.bfd, so the additional ones need to be added as well. I looked through the sources and found that arm64 and mips define similar prefixes, so I'm adding those as well, aside from the ones I observed. I'm not sure about powerpc64, which seems to already be handled through a section match, but if it comes back, the "__long_branch_" and "__plt_" prefixes would have to get added as well. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to '')
1 files changed, 6 insertions, 0 deletions
diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index 7ecd2ccba531..54ad86d13784 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -112,6 +112,12 @@ static bool is_ignored_symbol(const char *name, char type)
"__crc_", /* modversions */
"__efistub_", /* arm64 EFI stub namespace */
"__kvm_nvhe_", /* arm64 non-VHE KVM namespace */
+ "__AArch64ADRPThunk_", /* arm64 lld */
+ "__ARMV5PILongThunk_", /* arm lld */
+ "__ARMV7PILongThunk_",
+ "__ThumbV7PILongThunk_",
+ "__LA25Thunk_", /* mips lld */
+ "__microLA25Thunk_",