summaryrefslogtreecommitdiffstats
path: root/kernel/tools/perf/perf-read-vdso.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/tools/perf/perf-read-vdso.c')
-rw-r--r--kernel/tools/perf/perf-read-vdso.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/kernel/tools/perf/perf-read-vdso.c b/kernel/tools/perf/perf-read-vdso.c
new file mode 100644
index 000000000..764e2547c
--- /dev/null
+++ b/kernel/tools/perf/perf-read-vdso.c
@@ -0,0 +1,34 @@
+#include <stdio.h>
+#include <string.h>
+
+#define VDSO__MAP_NAME "[vdso]"
+
+/*
+ * Include definition of find_vdso_map() also used in util/vdso.c for
+ * building perf.
+ */
+#include "util/find-vdso-map.c"
+
+int main(void)
+{
+ void *start, *end;
+ size_t size, written;
+
+ if (find_vdso_map(&start, &end))
+ return 1;
+
+ size = end - start;
+
+ while (size) {
+ written = fwrite(start, 1, size, stdout);
+ if (!written)
+ return 1;
+ start += written;
+ size -= written;
+ }
+
+ if (fflush(stdout))
+ return 1;
+
+ return 0;
+}