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Sun, 29 Mar 2026 05:44:35 -0700 (PDT) Received: from f16.localdomain ([121.167.230.140]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c76916da892sm3700321a12.14.2026.03.29.05.44.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 29 Mar 2026 05:44:34 -0700 (PDT) From: Hoyeon Lee To: bpf@vger.kernel.org, Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau Cc: Eduard Zingerman , Kumar Kartikeya Dwivedi , Song Liu , Yonghong Song , Jiri Olsa , Shuah Khan , Feng Yang , linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH bpf-next v2 0/2] libbpf: allow address-based single kprobe attach Date: Sun, 29 Mar 2026 21:43:37 +0900 Message-ID: <20260329124429.689912-1-hoyeon.lee@suse.com> X-Mailer: git-send-email 2.52.0 Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Today libbpf can attach a single kprobe only by function name, with an optional offset. But the kernel also supports attaching a single kprobe directly by raw kernel address, through both legacy tracefs/debugfs kprobes and PMU-based non-legacy kprobes. Since libbpf doesn't support this yet, callers that already have a target IP still have to drop down to perf_event_open() or direct tracefs writes. This patchset adds address-based single-kprobe attach support to bpf_program__attach_kprobe_opts() and covers it in selftests/bpf. The first commit adds bpf_kprobe_opts.addr so that libbpf can attach single kprobes by raw address through both legacy tracefs/debugfs and PMU-based non-legacy paths. The second commit extends attach_probe selftests/bpf with address-based kprobe attach subtests for these paths. --- Changes in v2: - Fix line wrapping and indentation Hoyeon Lee (2): libbpf: allow address-based single kprobe attach selftests/bpf: add test for address-based single kprobe attach tools/lib/bpf/libbpf.c | 88 +++++++++++++------ tools/lib/bpf/libbpf.h | 5 +- .../selftests/bpf/prog_tests/attach_probe.c | 49 +++++++++++ 3 files changed, 114 insertions(+), 28 deletions(-) -- 2.52.0