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
19 static const char *orc_usage[] = {
20 "objtool orc generate [<options>] file.o",
21 "objtool orc dump file.o",
22 NULL,
23 };
24
cmd_orc(int argc,const char ** argv)25 int 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 }
74