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| // SPDX-License-Identifier: GPL-2.0-or-later
| /*
| * Copyright (C) 2015-2017 Josh Poimboeuf <jpoimboe@redhat.com>
| */
|
| /*
| * objtool check:
| *
| * This command analyzes every .o file and ensures the validity of its stack
| * trace metadata. It enforces a set of rules on asm code and C inline
| * assembly code so that stack traces can be reliable.
| *
| * For more information, see tools/objtool/Documentation/stack-validation.txt.
| */
|
| #include <subcmd/parse-options.h>
| #include <string.h>
| #include "builtin.h"
| #include "objtool.h"
|
| bool no_fp, no_unreachable, retpoline, module, backtrace, uaccess, stats,
| validate_dup, vmlinux, mcount, noinstr, sls, unret, rethunk;
|
| static const char * const check_usage[] = {
| "objtool check [<options>] file.o",
| NULL,
| };
|
| const struct option check_options[] = {
| OPT_BOOLEAN('f', "no-fp", &no_fp, "Skip frame pointer validation"),
| OPT_BOOLEAN('u', "no-unreachable", &no_unreachable, "Skip 'unreachable instruction' warnings"),
| OPT_BOOLEAN('r', "retpoline", &retpoline, "Validate retpoline assumptions"),
| OPT_BOOLEAN(0, "rethunk", &rethunk, "validate and annotate rethunk usage"),
| OPT_BOOLEAN(0, "unret", &unret, "validate entry unret placement"),
| OPT_BOOLEAN('m', "module", &module, "Indicates the object will be part of a kernel module"),
| OPT_BOOLEAN('b', "backtrace", &backtrace, "unwind on error"),
| OPT_BOOLEAN('a', "uaccess", &uaccess, "enable uaccess checking"),
| OPT_BOOLEAN('s', "stats", &stats, "print statistics"),
| OPT_BOOLEAN('d', "duplicate", &validate_dup, "duplicate validation for vmlinux.o"),
| OPT_BOOLEAN('n', "noinstr", &noinstr, "noinstr validation for vmlinux.o"),
| OPT_BOOLEAN('l', "vmlinux", &vmlinux, "vmlinux.o validation"),
| OPT_BOOLEAN('M', "mcount", &mcount, "generate __mcount_loc"),
| OPT_BOOLEAN('S', "sls", &sls, "validate straight-line-speculation"),
| OPT_END(),
| };
|
| int cmd_check(int argc, const char **argv)
| {
| const char *objname;
| struct objtool_file *file;
| int ret;
|
| argc = parse_options(argc, argv, check_options, check_usage, 0);
|
| if (argc != 1)
| usage_with_options(check_usage, check_options);
|
| objname = argv[0];
|
| file = objtool_open_read(objname);
| if (!file)
| return 1;
|
| ret = check(file);
| if (ret)
| return ret;
|
| if (file->elf->changed)
| return elf_write(file->elf);
|
| return 0;
| }
|
|
