1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2017 Josh Poimboeuf <jpoimboe@redhat.com>
4 */
5
6/*
7 * objtool orc:
8 *
9 * This command analyzes a .o file and adds .orc_unwind and .orc_unwind_ip
10 * sections to it, which is used by the in-kernel ORC unwinder.
11 *
12 * This command is a superset of "objtool check".
13 */
14
15#include <string.h>
16#include "builtin.h"
17#include "objtool.h"
18
19static const char *orc_usage[] = {
20	"objtool orc generate [<options>] file.o",
21	"objtool orc dump file.o",
22	NULL,
23};
24
25int cmd_orc(int argc, const char **argv)
26{
27	const char *objname;
28
29	argc--; argv++;
30	if (argc <= 0)
31		usage_with_options(orc_usage, check_options);
32
33	if (!strncmp(argv[0], "gen", 3)) {
34		struct objtool_file *file;
35		int ret;
36
37		argc = parse_options(argc, argv, check_options, orc_usage, 0);
38		if (argc != 1)
39			usage_with_options(orc_usage, check_options);
40
41		objname = argv[0];
42
43		file = objtool_open_read(objname);
44		if (!file)
45			return 1;
46
47		ret = check(file);
48		if (ret)
49			return ret;
50
51		if (list_empty(&file->insn_list))
52			return 0;
53
54		ret = orc_create(file);
55		if (ret)
56			return ret;
57
58		if (!file->elf->changed)
59			return 0;
60
61		return elf_write(file->elf);
62	}
63
64	if (!strcmp(argv[0], "dump")) {
65		if (argc != 2)
66			usage_with_options(orc_usage, check_options);
67
68		objname = argv[1];
69
70		return orc_dump(objname);
71	}
72
73	usage_with_options(orc_usage, check_options);
74
75	return 0;
76}
77