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69 lines
1.7 KiB
69 lines
1.7 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* builtin-kallsyms.c |
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* |
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* Builtin command: Look for a symbol in the running kernel and its modules |
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* |
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* Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <[email protected]> |
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*/ |
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#include <inttypes.h> |
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#include "builtin.h" |
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#include <linux/compiler.h> |
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#include <subcmd/parse-options.h> |
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#include "debug.h" |
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#include "dso.h" |
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#include "machine.h" |
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#include "map.h" |
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#include "symbol.h" |
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static int __cmd_kallsyms(int argc, const char **argv) |
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{ |
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int i; |
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struct machine *machine = machine__new_kallsyms(); |
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if (machine == NULL) { |
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pr_err("Couldn't read /proc/kallsyms\n"); |
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return -1; |
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} |
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for (i = 0; i < argc; ++i) { |
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struct map *map; |
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struct symbol *symbol = machine__find_kernel_symbol_by_name(machine, argv[i], &map); |
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if (symbol == NULL) { |
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printf("%s: not found\n", argv[i]); |
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continue; |
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} |
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printf("%s: %s %s %#" PRIx64 "-%#" PRIx64 " (%#" PRIx64 "-%#" PRIx64")\n", |
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symbol->name, map->dso->short_name, map->dso->long_name, |
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map->unmap_ip(map, symbol->start), map->unmap_ip(map, symbol->end), |
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symbol->start, symbol->end); |
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} |
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machine__delete(machine); |
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return 0; |
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} |
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int cmd_kallsyms(int argc, const char **argv) |
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{ |
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const struct option options[] = { |
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OPT_INCR('v', "verbose", &verbose, "be more verbose (show counter open errors, etc)"), |
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OPT_END() |
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}; |
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const char * const kallsyms_usage[] = { |
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"perf kallsyms [<options>] symbol_name", |
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NULL |
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}; |
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argc = parse_options(argc, argv, options, kallsyms_usage, 0); |
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if (argc < 1) |
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usage_with_options(kallsyms_usage, options); |
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symbol_conf.sort_by_name = true; |
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symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL); |
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if (symbol__init(NULL) < 0) |
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return -1; |
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return __cmd_kallsyms(argc, argv); |
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}
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