The following commit has been merged into the objtool/core branch of tip:

Commit-ID:     4109043bff31f95d3da9ace33eb3c1925fd62cbd
Gitweb:        https://git.kernel.org/tip/4109043bff31f95d3da9ace33eb3c1925fd62cbd
Author:        Josh Poimboeuf <jpoimboe@kernel.org>
AuthorDate:    Wed, 17 Sep 2025 09:03:17 -07:00
Committer:     Josh Poimboeuf <jpoimboe@kernel.org>
CommitterDate: Tue, 14 Oct 2025 14:45:22 -07:00

modpost: Ignore unresolved section bounds symbols

In preparation for klp-build livepatch module creation tooling,
suppress warnings for unresolved references to linker-generated
__start_* and __stop_* section bounds symbols.

These symbols are expected to be undefined when modpost runs, as they're
created later by the linker.

Cc: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Petr Mladek <pmladek@suse.com>
Tested-by: Joe Lawrence <joe.lawrence@redhat.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
---
 scripts/mod/modpost.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 47c8aa2..755b842 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -606,6 +606,11 @@ static int ignore_undef_symbol(struct elf_info *info, const char *symname)
 		    strstarts(symname, "_savevr_") ||
 		    strcmp(symname, ".TOC.") == 0)
 			return 1;
+
+	/* ignore linker-created section bounds variables */
+	if (strstarts(symname, "__start_") || strstarts(symname, "__stop_"))
+		return 1;
+
 	/* Do not ignore this symbol */
 	return 0;
 }