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 <string.h>
18 #include "builtin.h"
19 #include "objtool.h"
20
21 bool no_fp, no_unreachable, retpoline, module, backtrace, uaccess, stats, validate_dup, vmlinux;
22
23 static const char * const check_usage[] = {
24 "objtool check [<options>] file.o",
25 NULL,
26 };
27
28 const struct option check_options[] = {
29 OPT_BOOLEAN('f', "no-fp", &no_fp, "Skip frame pointer validation"),
30 OPT_BOOLEAN('u', "no-unreachable", &no_unreachable, "Skip 'unreachable instruction' warnings"),
31 OPT_BOOLEAN('r', "retpoline", &retpoline, "Validate retpoline assumptions"),
32 OPT_BOOLEAN('m', "module", &module, "Indicates the object will be part of a kernel module"),
33 OPT_BOOLEAN('b', "backtrace", &backtrace, "unwind on error"),
34 OPT_BOOLEAN('a', "uaccess", &uaccess, "enable uaccess checking"),
35 OPT_BOOLEAN('s', "stats", &stats, "print statistics"),
36 OPT_BOOLEAN('d', "duplicate", &validate_dup, "duplicate validation for vmlinux.o"),
37 OPT_BOOLEAN('l', "vmlinux", &vmlinux, "vmlinux.o validation"),
38 OPT_END(),
39 };
40
41 int cmd_check(int argc, const char **argv)
42 {
43 const char *objname, *s;
44
45 argc = parse_options(argc, argv, check_options, check_usage, 0);
46
47 if (argc != 1)
48 usage_with_options(check_usage, check_options);
49
50 objname = argv[0];
51
52 s = strstr(objname, "vmlinux.o");
53 if (s && !s[9])
54 vmlinux = true;
55
56 return check(objname, false);
57 }
58
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