4 * Builtin command: Look for a symbol in the running kernel and its modules
6 * Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
8 * Released under the GPL v2. (and only v2, not any later version)
12 #include <linux/compiler.h>
13 #include <subcmd/parse-options.h>
18 static int __cmd_kallsyms(int argc, const char **argv)
21 struct machine *machine = machine__new_kallsyms();
23 if (machine == NULL) {
24 pr_err("Couldn't read /proc/kallsyms\n");
28 for (i = 0; i < argc; ++i) {
30 struct symbol *symbol = machine__find_kernel_symbol_by_name(machine, argv[i], &map);
33 printf("%s: not found\n", argv[i]);
37 printf("%s: %s %s %#" PRIx64 "-%#" PRIx64 " (%#" PRIx64 "-%#" PRIx64")\n",
38 symbol->name, map->dso->short_name, map->dso->long_name,
39 map->unmap_ip(map, symbol->start), map->unmap_ip(map, symbol->end),
40 symbol->start, symbol->end);
43 machine__delete(machine);
47 int cmd_kallsyms(int argc, const char **argv)
49 const struct option options[] = {
50 OPT_INCR('v', "verbose", &verbose, "be more verbose (show counter open errors, etc)"),
53 const char * const kallsyms_usage[] = {
54 "perf kallsyms [<options>] symbol_name",
58 argc = parse_options(argc, argv, options, kallsyms_usage, 0);
60 usage_with_options(kallsyms_usage, options);
62 symbol_conf.sort_by_name = true;
63 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
64 if (symbol__init(NULL) < 0)
67 return __cmd_kallsyms(argc, argv);