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// 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 "env.h"
#include "machine.h"
#include "map.h"
#include "symbol.h"
static int __cmd_kallsyms(int argc, const char **argv)
{
int i, err;
struct perf_env host_env;
struct machine *machine = NULL;
perf_env__init(&host_env);
err = perf_env__set_cmdline(&host_env, argc, argv);
if (err)
goto out;
machine = machine__new_kallsyms(&host_env);
if (machine == NULL) {
pr_err("Couldn't read /proc/kallsyms\n");
err = -1;
goto out;
}
for (i = 0; i < argc; ++i) {
struct map *map;
const struct dso *dso;
struct symbol *symbol = machine__find_kernel_symbol_by_name(machine, argv[i], &map);
if (symbol == NULL) {
printf("%s: not found\n", argv[i]);
continue;
}
dso = map__dso(map);
printf("%s: %s %s %#" PRIx64 "-%#" PRIx64 " (%#" PRIx64 "-%#" PRIx64")\n",
symbol->name, dso__short_name(dso), dso__long_name(dso),
map__unmap_ip(map, symbol->start), map__unmap_ip(map, symbol->end),
symbol->start, symbol->end);
}
out:
machine__delete(machine);
perf_env__exit(&host_env);
return err;
}
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.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
if (symbol__init(NULL) < 0)
return -1;
return __cmd_kallsyms(argc, argv);
}
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