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}