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History

Martin KaFai Lau f9a7cf6eb1 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

2019-11-24 17:12:11 -08:00

api

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 251

2019-06-05 17:30:26 +02:00

bpf

bpf: Introduce BPF_TRACE_x helper for the tracing tests

2019-11-24 17:12:11 -08:00

lockdep

lockdep/lib/tests: Test dynamic key registration

2019-02-28 07:55:48 +01:00

subcmd

libsubcmd: Make _FORTIFY_SOURCE defines dependent on the feature