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perf tools: Remove unused 'prefix' from builtin functions
[karo-tx-linux.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 "builtin.h"
11 #include <linux/compiler.h>
12 #include <subcmd/parse-options.h>
13 #include "debug.h"
14 #include "machine.h"
15 #include "symbol.h"
16
17 static int __cmd_kallsyms(int argc, const char **argv)
18 {
19         int i;
20         struct machine *machine = machine__new_kallsyms();
21
22         if (machine == NULL) {
23                 pr_err("Couldn't read /proc/kallsyms\n");
24                 return -1;
25         }
26
27         for (i = 0; i < argc; ++i) {
28                 struct map *map;
29                 struct symbol *symbol = machine__find_kernel_function_by_name(machine, argv[i], &map);
30
31                 if (symbol == NULL) {
32                         printf("%s: not found\n", argv[i]);
33                         continue;
34                 }
35
36                 printf("%s: %s %s %#" PRIx64 "-%#" PRIx64 " (%#" PRIx64 "-%#" PRIx64")\n",
37                         symbol->name, map->dso->short_name, map->dso->long_name,
38                         map->unmap_ip(map, symbol->start), map->unmap_ip(map, symbol->end),
39                         symbol->start, symbol->end);
40         }
41
42         machine__delete(machine);
43         return 0;
44 }
45
46 int cmd_kallsyms(int argc, const char **argv)
47 {
48         const struct option options[] = {
49         OPT_INCR('v', "verbose", &verbose, "be more verbose (show counter open errors, etc)"),
50         OPT_END()
51         };
52         const char * const kallsyms_usage[] = {
53                 "perf kallsyms [<options>] symbol_name",
54                 NULL
55         };
56
57         argc = parse_options(argc, argv, options, kallsyms_usage, 0);
58         if (argc < 1)
59                 usage_with_options(kallsyms_usage, options);
60
61         symbol_conf.sort_by_name = true;
62         symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
63         if (symbol__init(NULL) < 0)
64                 return -1;
65
66         return __cmd_kallsyms(argc, argv);
67 }