[PATCH] scripts/mksysmap: skip objtool __pfx_ symbols

Arnd Bergmann
2025-03-28T11:22:02Z

From: Arnd Bergmann <arnd@arndb.de>

The recently added testcase for overly long symbols triggers when
CONFIG_FUNCTION_PADDING_CFI is set:

Symbol __pfx_snnnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnnnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nnng1h2i3j4k5l6m7ng1h2i3j4k5l6m7nng1h2i3j4k5l6m7ng1h2i3j4k5l6m7n too long for kallsyms (517 >= 512).
Please increase KSYM_NAME_LEN both in kernel and kallsyms.c

Change the mksymtab table so the prefixed symbols are not included
in kallsyms.

Fixes: c104c16073b7 ("Kunit to check the longest symbol length")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
scripts/mksysmap | 3 +++
1 file changed, 3 insertions(+)

diff --git a/scripts/mksysmap b/scripts/mksysmap
index 3accbdb269ac..33df38ede1e0 100755
--- a/scripts/mksysmap
+++ b/scripts/mksysmap
@@ -59,6 +59,9 @@
# EXPORT_SYMBOL (namespace)
/ __kstrtabns_/d

+# prefixed symbols from objtool
+/ __pfx_/d
+
# ---------------------------------------------------------------------------
# Ignored suffixes
# (do not forget '$' after each pattern)
--
2.39.5