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perf dlfilter: Add object_code() to perf_dlfilter_fns

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Add a function, for use by dlfilters, to read object code.

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/20210627131818.810-11-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter
2021-06-27 16:18:18 +03:00
committed by Arnaldo Carvalho de Melo
parent 6495e76252
commit ec4c00fedb
3 changed files with 41 additions and 2 deletions
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5
tools/perf/Documentation/perf-dlfilter.txt
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@@ -127,7 +127,8 @@ struct perf_dlfilter_fns {
const __u8 *(*insn)(void *ctx, __u32 *length);
const char *(*srcline)(void *ctx, __u32 *line_number);
struct perf_event_attr *(*attr)(void *ctx);
void *(*reserved[121])(void *);
__s32 (*object_code)(void *ctx, __u64 ip, void *buf, __u32 len);
void *(*reserved[120])(void *);
};
----
@@ -146,6 +147,8 @@ before calling. Returns 0 on success, -1 otherwise.
'attr' returns perf_event_attr, refer <linux/perf_event.h>.
'object_code' reads object code and returns the number of bytes read.
The perf_dlfilter_al structure
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~