LXR linux/tools/perf/perf-read-vdso.c

   1// SPDX-License-Identifier: GPL-2.0
   2#include <stdio.h>
   3#include <string.h>
   4
   5#define VDSO__MAP_NAME "[vdso]"
   6
   7/*
   8 * Include definition of find_map() also used in util/vdso.c for
   9 * building perf.
  10 */
  11#include "util/find-map.c"
  12
  13int main(void)
  14{
  15        void *start, *end;
  16        size_t size, written;
  17
  18        if (find_map(&start, &end, VDSO__MAP_NAME))
  19                return 1;
  20
  21        size = end - start;
  22
  23        while (size) {
  24                written = fwrite(start, 1, size, stdout);
  25                if (!written)
  26                        return 1;
  27                start += written;
  28                size -= written;
  29        }
  30
  31        if (fflush(stdout))
  32                return 1;
  33
  34        return 0;
  35}
  36