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libbpf: Show error info about missing ".BTF" section

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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>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20221217223509.88254-2-changbin.du@gmail.com
This commit is contained in:
Changbin Du
2022-12-18 06:35:08 +08:00
committed by Andrii Nakryiko
parent f7dba2c313
commit 49bd40e869
1 changed files with 1 additions and 0 deletions
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src/btf.c
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@@ -1003,6 +1003,7 @@ 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;
}