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 <objtool/builtin.h>
17#include <objtool/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 = cmd_parse_options(argc, argv, orc_usage);
38		objname = argv[0];
39
40		file = objtool_open_read(objname);
41		if (!file)
42			return 1;
43
44		ret = check(file);
45		if (ret)
46			return ret;
47
48		if (list_empty(&file->insn_list))
49			return 0;
50
51		ret = orc_create(file);
52		if (ret)
53			return ret;
54
55		if (!file->elf->changed)
56			return 0;
57
58		return elf_write(file->elf);
59	}
60
61	if (!strcmp(argv[0], "dump")) {
62		if (argc != 2)
63			usage_with_options(orc_usage, check_options);
64
65		objname = argv[1];
66
67		return orc_dump(objname);
68	}
69
70	usage_with_options(orc_usage, check_options);
71
72	return 0;
73}