Merge branch 'for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
[linux-2.6-microblaze.git] / tools / perf / builtin-kallsyms.c
1 /*
2  * builtin-kallsyms.c
3  *
4  * Builtin command: Look for a symbol in the running kernel and its modules
5  *
6  * Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
7  *
8  * Released under the GPL v2. (and only v2, not any later version)
9  */
10 #include <inttypes.h>
11 #include "builtin.h"
12 #include <linux/compiler.h>
13 #include <subcmd/parse-options.h>
14 #include "debug.h"
15 #include "machine.h"
16 #include "symbol.h"
17
18 static int __cmd_kallsyms(int argc, const char **argv)
19 {
20         int i;
21         struct machine *machine = machine__new_kallsyms();
22
23         if (machine == NULL) {
24                 pr_err("Couldn't read /proc/kallsyms\n");
25                 return -1;
26         }
27
28         for (i = 0; i < argc; ++i) {
29                 struct map *map;
30                 struct symbol *symbol = machine__find_kernel_symbol_by_name(machine, argv[i], &map);
31
32                 if (symbol == NULL) {
33                         printf("%s: not found\n", argv[i]);
34                         continue;
35                 }
36
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);
41         }
42
43         machine__delete(machine);
44         return 0;
45 }
46
47 int cmd_kallsyms(int argc, const char **argv)
48 {
49         const struct option options[] = {
50         OPT_INCR('v', "verbose", &verbose, "be more verbose (show counter open errors, etc)"),
51         OPT_END()
52         };
53         const char * const kallsyms_usage[] = {
54                 "perf kallsyms [<options>] symbol_name",
55                 NULL
56         };
57
58         argc = parse_options(argc, argv, options, kallsyms_usage, 0);
59         if (argc < 1)
60                 usage_with_options(kallsyms_usage, options);
61
62         symbol_conf.sort_by_name = true;
63         symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
64         if (symbol__init(NULL) < 0)
65                 return -1;
66
67         return __cmd_kallsyms(argc, argv);
68 }