On Mon, Jun 7, 2021 at 4:12 PM Tom Stellard <tstellar@xxxxxxxxxx> wrote:
>
>
> Hi,
>
> >+ } else {
> >+ pr_warn("relocation against STT_SECTION in non-exec section is not supported!\n");
> >+ return -EINVAL;
> >+ }
>
> Kernel build of commit 324c92e5e0ee are failing for me with this error
> message:
>
> /builddir/build/BUILD/kernel-5.13-rc4-61-g324c92e5e0ee/linux-5.13.0-0.rc4.20210603git324c92e5e0ee.35.fc35.x86_64/tools/bpf/bpftool/bpftool gen object /builddir/build/BUILD/kernel-5.13-rc4-61-g324c92e5e0ee/linux-5.13.0-0.rc4.20210603git324c92e5e0ee.35.fc35.x86_64/tools/testing/selftests/bpf/bind_perm.linked1.o /builddir/build/BUILD/kernel-5.13-rc4-61-g324c92e5e0ee/linux-5.13.0-0.rc4.20210603git324c92e5e0ee.35.fc35.x86_64/tools/testing/selftests/bpf/bind_perm.o
> libbpf: relocation against STT_SECTION in non-exec section is not supported!
>
> What information can I provide to help debug this failure?
Can you please send that bind_perm.o file? Also what's your `clang
--version` output?
I suspect this might be due to Clang commit 6a2ea84600ba ("BPF: Add
more relocation kinds"), but I get a different error on 324c92e5e0ee.
So meanwhile you might try applying 9f0c317f6aa1 ("libbpf: Add support
for new llvm bpf relocations") from bpf-next/master and check if that
helps. But please do share bind_perm.o, just to double-check what's
going on.
>
> Thanks,
> Tom
>
