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