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libbpf: Allow decimal offset for kprobes

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Allow to specify decimal offset in SEC macro, like:
  SEC("kprobe/bpf_fentry_test7+5")

Add selftest for that.

Suggested-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Alan Maguire <alan.maguire@oracle.com>
Tested-by: Alan Maguire <alan.maguire@oracle.com>
Link: https://lore.kernel.org/bpf/20210721215810.889975-3-jolsa@kernel.org
This commit is contained in:
Jiri Olsa
2021-07-21 23:58:09 +02:00
committed by Andrii Nakryiko
parent bb92e7ab4d
commit d7a2de020b
1 changed files with 1 additions and 1 deletions
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src/libbpf.c
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@@ -10424,7 +10424,7 @@ static struct bpf_link *attach_kprobe(const struct bpf_sec_def *sec,
func_name = prog->sec_name + sec->len;
opts.retprobe = strcmp(sec->sec, "kretprobe/") == 0;
n = sscanf(func_name, "%m[a-zA-Z0-9_.]+%lx", &func, &offset);
n = sscanf(func_name, "%m[a-zA-Z0-9_.]+%li", &func, &offset);
if (n < 1) {
err = -EINVAL;
pr_warn("kprobe name is invalid: %s\n", func_name);