Update the perf.data file format description on header
section HEADER_BPF_PROG_INFO.
The information is taken from process_bpf_prog_info()
and write_bpf_prog_info() from file util/header.c.
Signed-off-by: Thomas Richter <tmricht@xxxxxxxxxxxxx>
Acked-by: Sumanth Korikkar <sumanthk@xxxxxxxxxxxxx>
Reviewed-by: Jan Polensky <japo@xxxxxxxxxxxxx>
---
tools/perf/Documentation/perf.data-file-format.txt | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/tools/perf/Documentation/perf.data-file-format.txt b/tools/perf/Documentation/perf.data-file-format.txt
index cd95ba09f727..0437eb5d9188 100644
--- a/tools/perf/Documentation/perf.data-file-format.txt
+++ b/tools/perf/Documentation/perf.data-file-format.txt
@@ -348,6 +348,16 @@ to special needs.
struct perf_bpil, which contains detailed information about
a BPF program, including type, id, tag, jited/xlated instructions, etc.
+The format of data in HEADER_BPF_PROG_INFO is as follows:
+ u32 count
+
+ struct perf_bpil {
+ u32 info_len; /* size of struct bpf_prog_info, when the tool is compiled */
+ u32 data_len; /* total bytes allocated for data, round up to 8 bytes */
+ u64 arrays; /* which arrays are included in data */
+ struct bpf_prog_info info;
+ u8 data[];
+ }[count];
HEADER_BPF_BTF = 26,
--
2.48.1
