linux-kernel - [PATCH 3/7] perf header: Swap pmu mapping numbers if needed

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Date:	Wed,  5 Sep 2012 14:02:49 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Namhyung Kim <namhyung.kim@....com>,
	Robert Richter <robert.richter@....com>
Subject: [PATCH 3/7] perf header: Swap pmu mapping numbers if needed

From: Namhyung Kim <namhyung.kim@....com>

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

Cc: Robert Richter <robert.richter@....com>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/util/header.c | 6 ++++++
 1 file changed, 6 insertions(+)

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;
-- 
1.7.11.4

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