# \[PATCH bpf-next v2 2/3\] libbpf: support detecting and attaching of writable tracepoint program

- From: Hou Tao \<hidden\>
- Date: 2021-09-18 01:56:07 
- List: netdev
- Page: https://ratatoskr.run/netdev/2021/09/7779750
- Thread: https://ratatoskr.run/netdev/2021/09/7779748/t.md

```text
Program on writable tracepoint is BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE,
but its attachment is the same as BPF_PROG_TYPE_RAW_TRACEPOINT.

Signed-off-by: Hou Tao <redacted>
---
 tools/lib/bpf/libbpf.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index da65a1666a5e..981fcdd95bdc 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -7976,6 +7976,10 @@ static const struct bpf_sec_def section_defs[] = {
 		.attach_fn = attach_raw_tp),
 	SEC_DEF("raw_tp/", RAW_TRACEPOINT,
 		.attach_fn = attach_raw_tp),
+	SEC_DEF("raw_tracepoint_writable/", RAW_TRACEPOINT_WRITABLE,
+		.attach_fn = attach_raw_tp),
+	SEC_DEF("raw_tp_writable/", RAW_TRACEPOINT_WRITABLE,
+		.attach_fn = attach_raw_tp),
 	SEC_DEF("tp_btf/", TRACING,
 		.expected_attach_type = BPF_TRACE_RAW_TP,
 		.is_attach_btf = true,
-- 
2.29.2

```