On Thu, Jun 11, 2020 at 4:00 AM Jesper Dangaard Brouer <brouer@xxxxxxxxxx> wrote: > > (Cross-posting to iovisor-dev) > > Seeking input from BPF-llvm developers. How come Clang/LLVM 10+ is > generating incompatible BTF-info in ELF file, and downgrading to LLVM-9 > fixes the issue ? > > > On Wed, 10 Jun 2020 14:50:27 -0700 Elerion <elerion1000@xxxxxxxxx> wrote: > > > Never mind, I fixed it by downgrading to Clang 9. > > > > It appears to be an issue with Clang/LLVM 10+ > > > > https://github.com/cilium/ebpf/issues/43 This is newer Clang recording that function is global, not static. libbpf is sanitizing BTF to remove this flag, if kernel doesn't support this. But given this is re-implementation of libbpf, that's probably not happening, right? > > > > On Wed, Jun 10, 2020 at 2:38 PM Toke Høiland-Jørgensen <toke@xxxxxxxxxx> wrote: > > > > > > Elerion <elerion1000@xxxxxxxxx> writes: > > > > > > > [69] FUNC xdp_program type_id=68 vlen != 0 > > > > > > 'vlen != 0' is the error. Not sure why you hit that; what's the output > > > of 'bpftool btf dump file yourprog.o' ? > > > > > > -Toke > > > > > > -- > Best regards, > Jesper Dangaard Brouer > MSc.CS, Principal Kernel Engineer at Red Hat > LinkedIn: http://www.linkedin.com/in/brouer >
|