perf header: Swap pmu mapping numbers if needed

Like others, the numbers can be saved in a different endian format than
a host machine.  Swap them if needed.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Robert Richter <robert.richter@amd.com>
Link: http://lkml.kernel.org/r/1346821373-31621-4-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 05c9310c3da1..43425b75f0c9 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1440,6 +1440,9 @@ static void print_pmu_mappings(struct perf_header *ph, int fd, FILE *fp)
         if (ret != sizeof(pmu_num))
                 goto error;
 
+        if (ph->needs_swap)
+                pmu_num = bswap_32(pmu_num);
+
         if (!pmu_num) {
                 fprintf(fp, "# pmu mappings: not available\n");
                 return;
@@ -1448,6 +1451,9 @@ static void print_pmu_mappings(struct perf_header *ph, int fd, FILE *fp)
         while (pmu_num) {
                 if (read(fd, &type, sizeof(type)) != sizeof(type))
                         break;
+                if (ph->needs_swap)
+                        type = bswap_32(type);
+
                 name = do_read_string(fd, ph);
                 if (!name)
                         break;