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| author | Martin KaFai Lau <kafai@fb.com> | 2019-11-23 12:25:04 -0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2019-11-24 17:12:11 -0800 |
| commit | f9a7cf6eb17cd0110c8c47d9e7969fc2716e5772 (patch) | |
| tree | 9db74c8c6aaa198f2d163d066abe228f24bb22d5 /kernel/bpf/trampoline.c | |
| parent | b8cd76ca4ae34731d47cd6a876d912a08efcc240 (diff) | |
bpf: Introduce BPF_TRACE_x helper for the tracing tests
For BPF_PROG_TYPE_TRACING, the bpf_prog's ctx is an array of u64.
This patch borrows the idea from BPF_CALL_x in filter.h to
convert a u64 to the arg type of the traced function.
The new BPF_TRACE_x has an arg to specify the return type of a bpf_prog.
It will be used in the future TCP-ops bpf_prog that may return "void".
The new macros are defined in the new header file "bpf_trace_helpers.h".
It is under selftests/bpf/ for now. It could be moved to libbpf later
after seeing more upcoming non-tracing use cases.
The tests are changed to use these new macros also. Hence,
the k[s]u8/16/32/64 are no longer needed and they are removed
from the bpf_helpers.h.
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191123202504.1502696-1-kafai@fb.com
Diffstat (limited to 'kernel/bpf/trampoline.c')
0 files changed, 0 insertions, 0 deletions