[PATCH v3 1/2] libbpf: show error info about missing ".BTF" section

Changbin Du
2022-12-17T22:36:24Z

Show the real problem instead of just saying "No such file or directory".

Now will print below info:
libbpf: failed to find '.BTF' ELF section in /home/changbin/work/linux/vmlinux
Error: failed to load BTF from /home/changbin/work/linux/vmlinux: No such file or directory

Signed-off-by: Changbin Du <changbin.du@gmail.com>
---
tools/lib/bpf/btf.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c
index 71e165b09ed5..dd2badf1a54e 100644
--- a/tools/lib/bpf/btf.c
+++ b/tools/lib/bpf/btf.c
@@ -990,6 +990,7 @@ static struct btf *btf_parse_elf(const char *path, struct btf *base_btf,
err = 0;

if (!btf_data) {
+ pr_warn("failed to find '%s' ELF section in %s\n", BTF_ELF_SEC, path);
err = -ENOENT;
goto done;
}
--
2.37.2