1 files changed, 22 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/struct_ops_detach.c b/tools/testing/selftests/bpf/progs/struct_ops_detach.c
new file mode 100644
index 000000000000..284a5b008e0c
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/struct_ops_detach.c
@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */
+#include <vmlinux.h>
+#include <bpf/bpf_helpers.h>
+#include "../test_kmods/bpf_testmod.h"
+
+char _license[] SEC("license") = "GPL";
+
+/*
+ * This subprogram validates that libbpf handles the situation in which BPF
+ * object has subprograms in .text section, but has no entry BPF programs.
+ * At some point that was causing issues due to legacy logic of treating such
+ * subprogram as entry program (with unknown program type, which would fail).
+ */
+int dangling_subprog(void)
+{
+	/* do nothing, just be here */
+	return 0;
+}
+
+SEC(".struct_ops.link")
+struct bpf_testmod_ops testmod_do_detach;