selftests/bpf: add BPF_CORE_READ relocatable read macro

Add BPF_CORE_READ macro used in tests to do bpf_core_read(), which
automatically captures offset relocation.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
1 file changed