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}