[PATCH v2 1/2] libbpf: show error info about missing ".BTF" section

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

Now will print below info: libbpf: can not find '.BTF' section 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 d88647da2c7f..1adc0f6019a0 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("can not find '%s' section\n", BTF_ELF_SEC); err = -ENOENT; goto done; }