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authorAdrian Hunter <adrian.hunter@intel.com>2014-10-23 18:16:03 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2014-10-29 10:32:48 -0200
commite477f3f01a89a8fd44031e7f2ba6ffcab037336c (patch)
tree36d6011cee4ae37dd5e0340cca5c1c0a125be42e /tools/perf/util
parent42634bc7a02ead59cf2d50e60d8b8f825de8a3b0 (diff)
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')
-rw-r--r--tools/perf/util/find-vdso-map.c30
-rw-r--r--tools/perf/util/vdso.c37
2 files changed, 36 insertions, 31 deletions
diff --git a/tools/perf/util/find-vdso-map.c b/tools/perf/util/find-vdso-map.c
new file mode 100644
index 000000000000..95ef1cffc056
--- /dev/null
+++ b/tools/perf/util/find-vdso-map.c
@@ -0,0 +1,30 @@
+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) {
+ fprintf(stderr, "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;
+}
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;