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-rw-r--r--tools/perf/builtin-kallsyms.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/tools/perf/builtin-kallsyms.c b/tools/perf/builtin-kallsyms.c
new file mode 100644
index 000000000000..224bfc454b4a
--- /dev/null
+++ b/tools/perf/builtin-kallsyms.c
@@ -0,0 +1,67 @@
+/*
+ * builtin-kallsyms.c
+ *
+ * Builtin command: Look for a symbol in the running kernel and its modules
+ *
+ * Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
+ *
+ * Released under the GPL v2. (and only v2, not any later version)
+ */
+#include "builtin.h"
+#include <linux/compiler.h>
+#include <subcmd/parse-options.h>
+#include "debug.h"
+#include "machine.h"
+#include "symbol.h"
+
+static int __cmd_kallsyms(int argc, const char **argv)
+{
+ int i;
+ struct machine *machine = machine__new_kallsyms();
+
+ if (machine == NULL) {
+ pr_err("Couldn't read /proc/kallsyms\n");
+ return -1;
+ }
+
+ for (i = 0; i < argc; ++i) {
+ struct map *map;
+ struct symbol *symbol = machine__find_kernel_function_by_name(machine, argv[i], &map);
+
+ if (symbol == NULL) {
+ printf("%s: not found\n", argv[i]);
+ continue;
+ }
+
+ printf("%s: %s %s %#" PRIx64 "-%#" PRIx64 " (%#" PRIx64 "-%#" PRIx64")\n",
+ symbol->name, map->dso->short_name, map->dso->long_name,
+ map->unmap_ip(map, symbol->start), map->unmap_ip(map, symbol->end),
+ symbol->start, symbol->end);
+ }
+
+ machine__delete(machine);
+ return 0;
+}
+
+int cmd_kallsyms(int argc, const char **argv, const char *prefix __maybe_unused)
+{
+ const struct option options[] = {
+ OPT_INCR('v', "verbose", &verbose, "be more verbose (show counter open errors, etc)"),
+ OPT_END()
+ };
+ const char * const kallsyms_usage[] = {
+ "perf kallsyms [<options>] symbol_name",
+ NULL
+ };
+
+ argc = parse_options(argc, argv, options, kallsyms_usage, 0);
+ if (argc < 1)
+ usage_with_options(kallsyms_usage, options);
+
+ symbol_conf.sort_by_name = true;
+ symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
+ if (symbol__init(NULL) < 0)
+ return -1;
+
+ return __cmd_kallsyms(argc, argv);
+}