tools/objtool/builtin-check.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2015-2017 Josh Poimboeuf <jpoimboe@redhat.com>
   4  */
   5
   6 /*
   7  * objtool check:
   8  *
   9  * This command analyzes every .o file and ensures the validity of its stack
  10  * trace metadata.  It enforces a set of rules on asm code and C inline
  11  * assembly code so that stack traces can be reliable.
  12  *
  13  * For more information, see tools/objtool/Documentation/stack-validation.txt.
  14  */
  15
  16 #include <subcmd/parse-options.h>
  17 #include "builtin.h"
  18 #include "check.h"
  19
  20 bool no_fp, no_unreachable, retpoline, module, backtrace, uaccess;
  21
  22 static const char * const check_usage[] = {
  23         "objtool check [<options>] file.o",
  24         NULL,
  25 };
  26
  27 const struct option check_options[] = {
  28         OPT_BOOLEAN('f', "no-fp", &no_fp, "Skip frame pointer validation"),
  29         OPT_BOOLEAN('u', "no-unreachable", &no_unreachable, "Skip 'unreachable instruction' warnings"),
  30         OPT_BOOLEAN('r', "retpoline", &retpoline, "Validate retpoline assumptions"),
  31         OPT_BOOLEAN('m', "module", &module, "Indicates the object will be part of a kernel module"),
  32         OPT_BOOLEAN('b', "backtrace", &backtrace, "unwind on error"),
  33         OPT_BOOLEAN('a', "uaccess", &uaccess, "enable uaccess checking"),
  34         OPT_END(),
  35 };
  36
  37 int cmd_check(int argc, const char **argv)
  38 {
  39         const char *objname;
  40
  41         argc = parse_options(argc, argv, check_options, check_usage, 0);
  42
  43         if (argc != 1)
  44                 usage_with_options(check_usage, check_options);
  45
  46         objname = argv[0];
  47
  48         return check(objname, false);
  49 }