| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Copyright (C) 2017 Josh Poimboeuf <jpoimboe@redhat.com> |
| */ |
| |
| /* |
| * objtool orc: |
| * |
| * This command analyzes a .o file and adds .orc_unwind and .orc_unwind_ip |
| * sections to it, which is used by the in-kernel ORC unwinder. |
| * |
| * This command is a superset of "objtool check". |
| */ |
| |
| #include <string.h> |
| #include <objtool/builtin.h> |
| #include <objtool/objtool.h> |
| |
| static const char *orc_usage[] = { |
| "objtool orc generate [<options>] file.o", |
| "objtool orc dump file.o", |
| NULL, |
| }; |
| |
| int cmd_orc(int argc, const char **argv) |
| { |
| const char *objname; |
| |
| argc--; argv++; |
| if (argc <= 0) |
| usage_with_options(orc_usage, check_options); |
| |
| if (!strncmp(argv[0], "gen", 3)) { |
| struct objtool_file *file; |
| int ret; |
| |
| argc = parse_options(argc, argv, check_options, orc_usage, 0); |
| if (argc != 1) |
| usage_with_options(orc_usage, check_options); |
| |
| objname = argv[0]; |
| |
| file = objtool_open_read(objname); |
| if (!file) |
| return 1; |
| |
| ret = check(file); |
| if (ret) |
| return ret; |
| |
| if (list_empty(&file->insn_list)) |
| return 0; |
| |
| ret = orc_create(file); |
| if (ret) |
| return ret; |
| |
| if (!file->elf->changed) |
| return 0; |
| |
| return elf_write(file->elf); |
| } |
| |
| if (!strcmp(argv[0], "dump")) { |
| if (argc != 2) |
| usage_with_options(orc_usage, check_options); |
| |
| objname = argv[1]; |
| |
| return orc_dump(objname); |
| } |
| |
| usage_with_options(orc_usage, check_options); |
| |
| return 0; |
| } |