Andrii Nakryiko wrote:
> If BPF code contains unused BPF subprogram and there are no other subprogram
> calls (which can realistically happen in real-world applications given
> sufficiently smart Clang code optimizations), libbpf will erroneously assume
> that subprograms are entry-point programs and will attempt to load them with
> UNSPEC program type.
>
> Fix by not relying on subcall instructions and rather detect it based on the
> structure of BPF object's sections.
>
> Reported-by: Dmitrii Banshchikov <dbanschikov@xxxxxx>
> Fixes: 9a94f277c4fb ("tools: libbpf: restore the ability to load programs from .text section")
> Signed-off-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
> ---
Acked-by: John Fastabend <john.fastabend@xxxxxxxxx>
