perf dlfilter: Add insn() to perf_dlfilter_fns

Add a function, for use by dlfilters, to return instruction bytes.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210627131818.810-8-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/tools/perf/Documentation/perf-dlfilter.txt b/tools/perf/Documentation/perf-dlfilter.txt
index 642323ac8934..bc4dba0995d8 100644
--- a/tools/perf/Documentation/perf-dlfilter.txt
+++ b/tools/perf/Documentation/perf-dlfilter.txt
@@ -124,7 +124,8 @@ struct perf_dlfilter_fns {
 	const struct perf_dlfilter_al *(*resolve_addr)(void *ctx);
 	char **(*args)(void *ctx, int *dlargc);
 	__s32 (*resolve_address)(void *ctx, __u64 address, struct perf_dlfilter_al *al);
-	void *(*reserved[124])(void *);
+	const __u8 *(*insn)(void *ctx, __u32 *length);
+	void *(*reserved[123])(void *);
 };
 ----
 
@@ -137,6 +138,8 @@ struct perf_dlfilter_fns {
 'resolve_address' provides information about 'address'. al->size must be set
 before calling. Returns 0 on success, -1 otherwise.
 
+'insn' returns instruction bytes and length.
+
 The perf_dlfilter_al structure
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~