Adding fetch_kernel_buildid helper function to retrieve build id from running kernel. It will be used in following patches.
Link: http://lkml.kernel.org/n/tip-at98orsncas8v2ito61u3...@git.kernel.org Signed-off-by: Jiri Olsa <jo...@kernel.org> --- tools/perf/util/util.c | 18 ++++++++++++++++++ tools/perf/util/util.h | 2 ++ 2 files changed, 20 insertions(+) diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c index 41fc61d941ef..26f93866bc02 100644 --- a/tools/perf/util/util.c +++ b/tools/perf/util/util.c @@ -495,6 +495,24 @@ int parse_notes_buildid(void *note_data, size_t note_len, void *bf, return -1; } +int fetch_kernel_buildid(char *buildid, int size) +{ + char path[PATH_MAX], *buf; + size_t len; + int err; + + scnprintf(path, PATH_MAX, "%s/kernel/notes", + sysfs__mountpoint()); + + if (filename__read_str(path, &buf, &len)) + return -EINVAL; + + err = parse_notes_buildid(buf, len, buildid, size, false); + + free(buf); + return err; +} + const char *perf_tip(const char *dirpath) { struct strlist *tips; diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h index 27106548396b..1ccaa957e3ab 100644 --- a/tools/perf/util/util.h +++ b/tools/perf/util/util.h @@ -48,6 +48,8 @@ extern int cacheline_size; int fetch_kernel_version(unsigned int *puint, char *str, size_t str_sz); +int fetch_kernel_buildid(char *buildid, int size); + int parse_notes_buildid(void *note_data, size_t note_len, void *bf, size_t size, bool need_swap); -- 2.13.6
