LXR linux/tools/objtool/builtin-check.c

   1/*
   2 * Copyright (C) 2015-2017 Josh Poimboeuf <jpoimboe@redhat.com>
   3 *
   4 * This program is free software; you can redistribute it and/or
   5 * modify it under the terms of the GNU General Public License
   6 * as published by the Free Software Foundation; either version 2
   7 * of the License, or (at your option) any later version.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18/*
  19 * objtool check:
  20 *
  21 * This command analyzes every .o file and ensures the validity of its stack
  22 * trace metadata.  It enforces a set of rules on asm code and C inline
  23 * assembly code so that stack traces can be reliable.
  24 *
  25 * For more information, see tools/objtool/Documentation/stack-validation.txt.
  26 */
  27
  28#include <subcmd/parse-options.h>
  29#include "builtin.h"
  30#include "check.h"
  31
  32bool no_fp, no_unreachable, retpoline, module;
  33
  34static const char * const check_usage[] = {
  35        "objtool check [<options>] file.o",
  36        NULL,
  37};
  38
  39const struct option check_options[] = {
  40        OPT_BOOLEAN('f', "no-fp", &no_fp, "Skip frame pointer validation"),
  41        OPT_BOOLEAN('u', "no-unreachable", &no_unreachable, "Skip 'unreachable instruction' warnings"),
  42        OPT_BOOLEAN('r', "retpoline", &retpoline, "Validate retpoline assumptions"),
  43        OPT_BOOLEAN('m', "module", &module, "Indicates the object will be part of a kernel module"),
  44        OPT_END(),
  45};
  46
  47int cmd_check(int argc, const char **argv)
  48{
  49        const char *objname;
  50
  51        argc = parse_options(argc, argv, check_options, check_usage, 0);
  52
  53        if (argc != 1)
  54                usage_with_options(check_usage, check_options);
  55
  56        objname = argv[0];
  57
  58        return check(objname, false);
  59}
  60