Support bpf_get_func_arg() for BPF_TRACE_RAW_TP by getting the function
argument count from "prog->aux->attach_func_proto" during verifier inline.

Changes v3 -> v2:
* remove unnecessary NULL checking for prog->aux->attach_func_proto
* v2: https://lore.kernel.org/bpf/20260116071739.121182-1-dongml2@chinatelecom.cn/

Changes v2 -> v1:
* for nr_args, skip first 'void *__data' argument in btf_trace_##name
  typedef
* check the result4 and result5 in the selftests
* v1: https://lore.kernel.org/bpf/20260116035024.98214-1-dongml2@chinatelecom.cn/

Menglong Dong (2):
  bpf: support bpf_get_func_arg() for BPF_TRACE_RAW_TP
  selftests/bpf: test bpf_get_func_arg() for tp_btf

 kernel/bpf/verifier.c                         | 32 +++++++++++--
 kernel/trace/bpf_trace.c                      |  4 +-
 .../bpf/prog_tests/get_func_args_test.c       |  3 ++
 .../selftests/bpf/progs/get_func_args_test.c  | 45 +++++++++++++++++++
 .../bpf/test_kmods/bpf_testmod-events.h       | 10 +++++
 .../selftests/bpf/test_kmods/bpf_testmod.c    |  4 ++
 6 files changed, 92 insertions(+), 6 deletions(-)

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2.52.0