// SPDX-License-Identifier: GPL-2.0-only
|
/*
|
* 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>
|
*/
|
#include <inttypes.h>
|
#include "builtin.h"
|
#include <linux/compiler.h>
|
#include <subcmd/parse-options.h>
|
#include "debug.h"
|
#include "dso.h"
|
#include "machine.h"
|
#include "map.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_symbol_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 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);
|
}
|
