LXR linux/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
  20bool no_fp, no_unreachable, retpoline, module, backtrace, uaccess;
  21
  22static const char * const check_usage[] = {
  23        "objtool check [<options>] file.o",
  24        NULL,
  25};
  26
  27const 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
  37int 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}
  50