Mon, Oct 30, 2023 at 11:14:51AM CET, olsajiri@xxxxxxxxx wrote: >On Mon, Oct 30, 2023 at 10:35:59AM +0100, Jiri Pirko wrote: >> Hi BPF :) >> >> I'm trying to use bpf_dynptr_from_skb() kfunc in my program. I compiled >> it with having following declaration in the bpf .c file: >> extern int bpf_dynptr_from_skb(struct __sk_buff *skb, __u64 flags, >> struct bpf_dynptr *ptr__uninit) __ksym; >> >> I have all "BPF/BTF" kernel config options on. During load, >> I'm still getting: >> >> libbpf: failed to find BTF for extern 'bpf_dynptr_from_skb': -3 > >heya, >error -3 suggests there's no BTF generated, is there .BTF section >in the object ? did you compile with -g ? w/o -g. If I compile with -g, I'm getting this: libbpf: failed to find valid kernel BTF libbpf: Error loading vmlinux BTF: -3 > >jirka > >> >> I'm pretty much clueless about what may be wrong. Documentation didn't >> help me either :/ >> >> Any idea what I may be doing wrong? >> >> Thanks >> >> Jiri >>
