linux-kernel - [PATCH bpf-next v2 0/2] bpf: support bpf_get_func_arg() for BPF_TRACE_RAW

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Message-ID: <20260116071739.121182-1-dongml2@chinatelecom.cn>
Date: Fri, 16 Jan 2026 15:17:37 +0800
From: Menglong Dong <menglong8.dong@...il.com>
To: ast@...nel.org
Cc: daniel@...earbox.net,
	john.fastabend@...il.com,
	andrii@...nel.org,
	martin.lau@...ux.dev,
	eddyz87@...il.com,
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	rostedt@...dmis.org,
	mhiramat@...nel.org,
	mathieu.desnoyers@...icios.com,
	bpf@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org
Subject: [PATCH bpf-next v2 0/2] bpf: support bpf_get_func_arg() for BPF_TRACE_RAW_TP

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 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                         | 36 +++++++++++++--
 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, 96 insertions(+), 6 deletions(-)

-- 
2.52.0