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| author | John Fastabend <john.fastabend@gmail.com> | 2018-04-23 21:11:02 +0200 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-04-23 23:42:21 +0200 |
| commit | 514d6c1959f9b396f1b51850925900adedffb951 (patch) | |
| tree | f806288e530b2d6623b599123bea3d229a37d68d /samples | |
| parent | bpf: disable and restore preemption in __BPF_PROG_RUN_ARRAY (diff) | |
| download | linux-514d6c1959f9b396f1b51850925900adedffb951.tar.xz linux-514d6c1959f9b396f1b51850925900adedffb951.zip | |
bpf: Document sockmap '-target bpf' requirement for PROG_TYPE_SK_MSG
BPF_PROG_TYPE_SK_MSG programs use a 'void *' for both data and the
data_end pointers. Additionally, the verifier ensures that every
accesses into the values is a __u64 read. This correctly maps on
to the BPF 64-bit architecture.
However, to ensure that when building on 32bit architectures that
clang uses correct types the '-target bpf' option _must_ be
specified. To make this clear add a note to the Documentation.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'samples')
0 files changed, 0 insertions, 0 deletions