On Tue, Jul 28, 2020 at 5:15 AM Ilya Leoshkevich <iii@xxxxxxxxxxxxx> wrote:
>
> Yet another adaptation to commit 0ebeea8ca8a4 ("bpf: Restrict
> bpf_probe_read{, str}() only to archs where they work") that makes more
> samples compile on s390.
>
> Signed-off-by: Ilya Leoshkevich <iii@xxxxxxxxxxxxx>
> ---
Sorry, we can't do this yet. This will break on older kernels that
don't yet have bpf_probe_read_kernel() implemented. Met and Yonghong
are working on extending a set of CO-RE relocations, that would allow
to do bpf_probe_read_kernel() detection on BPF side, transparently for
an application, and will pick either bpf_probe_read() or
bpf_probe_read_kernel(). It should be ready soon (this or next week,
most probably), though it will have dependency on the latest Clang.
But for now, please don't change this.
> tools/lib/bpf/bpf_core_read.h | 51 ++++++++++++++++++-----------------
> tools/lib/bpf/bpf_tracing.h | 15 +++++++----
> 2 files changed, 37 insertions(+), 29 deletions(-)
>
[...]
