1 // SPDX-License-Identifier: GPL-2.0-only
5 * Builtin command: Look for a symbol in the running kernel and its modules
7 * Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
11 #include <linux/compiler.h>
12 #include <subcmd/parse-options.h>
19 static int __cmd_kallsyms(int argc, const char **argv)
22 struct machine *machine = machine__new_kallsyms();
24 if (machine == NULL) {
25 pr_err("Couldn't read /proc/kallsyms\n");
29 for (i = 0; i < argc; ++i) {
31 const struct dso *dso;
32 struct symbol *symbol = machine__find_kernel_symbol_by_name(machine, argv[i], &map);
35 printf("%s: not found\n", argv[i]);
40 printf("%s: %s %s %#" PRIx64 "-%#" PRIx64 " (%#" PRIx64 "-%#" PRIx64")\n",
41 symbol->name, dso->short_name, dso->long_name,
42 map__unmap_ip(map, symbol->start), map__unmap_ip(map, symbol->end),
43 symbol->start, symbol->end);
46 machine__delete(machine);
50 int cmd_kallsyms(int argc, const char **argv)
52 const struct option options[] = {
53 OPT_INCR('v', "verbose", &verbose, "be more verbose (show counter open errors, etc)"),
56 const char * const kallsyms_usage[] = {
57 "perf kallsyms [<options>] symbol_name",
61 argc = parse_options(argc, argv, options, kallsyms_usage, 0);
63 usage_with_options(kallsyms_usage, options);
65 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
66 if (symbol__init(NULL) < 0)
69 return __cmd_kallsyms(argc, argv);