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author | 2014-10-23 18:16:03 -0300 | |
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committer | 2014-10-29 10:32:48 -0200 | |
commit | e477f3f01a89a8fd44031e7f2ba6ffcab037336c (patch) | |
tree | 36d6011cee4ae37dd5e0340cca5c1c0a125be42e /tools/perf/util/vdso.c | |
parent | perf pmu: Let pmu's with no events show up on perf list (diff) | |
download | linux-e477f3f01a89a8fd44031e7f2ba6ffcab037336c.tar.gz linux-e477f3f01a89a8fd44031e7f2ba6ffcab037336c.tar.bz2 linux-e477f3f01a89a8fd44031e7f2ba6ffcab037336c.zip |
perf tools: Build programs to copy 32-bit compatibility
perf tools copy VDSO out of memory. However, on 64-bit machines there
may be 32-bit compatibility VDOs also. To copy those requires separate
32-bit executables.
This patch adds to the build additional programs perf-read-vdso32 and
perf-read-vdsox32 for 32-bit and x32 respectively.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1414061124-26830-15-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/vdso.c')
-rw-r--r-- | tools/perf/util/vdso.c | 37 |
1 files changed, 6 insertions, 31 deletions
diff --git a/tools/perf/util/vdso.c b/tools/perf/util/vdso.c index adca69384fcc..f51390a1ed51 100644 --- a/tools/perf/util/vdso.c +++ b/tools/perf/util/vdso.c @@ -15,6 +15,12 @@ #include "linux/string.h" #include "debug.h" +/* + * Include definition of find_vdso_map() also used in perf-read-vdso.c for + * building perf-read-vdso32 and perf-read-vdsox32. + */ +#include "find-vdso-map.c" + #define VDSO__TEMP_FILE_NAME "/tmp/perf-vdso.so-XXXXXX" struct vdso_file { @@ -40,37 +46,6 @@ static struct vdso_info *vdso_info__new(void) return memdup(&vdso_info_init, sizeof(vdso_info_init)); } -static int find_vdso_map(void **start, void **end) -{ - FILE *maps; - char line[128]; - int found = 0; - - maps = fopen("/proc/self/maps", "r"); - if (!maps) { - pr_err("vdso: cannot open maps\n"); - return -1; - } - - while (!found && fgets(line, sizeof(line), maps)) { - int m = -1; - - /* We care only about private r-x mappings. */ - if (2 != sscanf(line, "%p-%p r-xp %*x %*x:%*x %*u %n", - start, end, &m)) - continue; - if (m < 0) - continue; - - if (!strncmp(&line[m], VDSO__MAP_NAME, - sizeof(VDSO__MAP_NAME) - 1)) - found = 1; - } - - fclose(maps); - return !found; -} - static char *get_file(struct vdso_file *vdso_file) { char *vdso = NULL; |