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
  32 bool no_fp, no_unreachable, retpoline, module;
  33
  34 static const char * const check_usage[] = {
  35         "objtool check [<options>] file.o",
  36         NULL,
  37 };
  38
  39 const 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
  47 int 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 }