perf evsel: Handle endianity in intval method

We were relying on the info in pevent, but since we have it in
perf_evsel, set up by the perf_session routine if read from a perf.data
file or by whoever creates the evsels, use it.

New 'perf test' entries will use it to parse locally generated events,
in a non perf.data centered workflow.

As well as use byteswap.h to get per arch optimized swap routines, like
other parts of perf (header, perf_evsel__parse_sample, symbol, etc)
already do.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-8tjuxk09mlsfmh7macgkxsip@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 34 insertions, 4 deletions

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index fe9581b0323..c78e42ab977 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1108,13 +1108,43 @@ u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample,
                        const char *name)
 {
         struct format_field *field = perf_evsel__field(evsel, name);
-        u64 val;
+        void *ptr;
+        u64 value;
 
         if (!field)
                 return 0;
 
-        val = pevent_read_number(evsel->tp_format->pevent,
-                                 sample->raw_data + field->offset, field->size);
-        return val;
+        ptr = sample->raw_data + field->offset;
 
+        switch (field->size) {
+        case 1:
+                return *(u8 *)ptr;
+        case 2:
+                value = *(u16 *)ptr;
+                break;
+        case 4:
+                value = *(u32 *)ptr;
+                break;
+        case 8:
+                value = *(u64 *)ptr;
+                break;
+        default:
+                return 0;
+        }
+
+        if (!evsel->needs_swap)
+                return value;
+
+        switch (field->size) {
+        case 2:
+                return bswap_16(value);
+        case 4:
+                return bswap_32(value);
+        case 8:
+                return bswap_64(value);
+        default:
+                return 0;
+        }
+
+        return 0;
 }