71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2015-2017 Josh Poimboeuf <jpoimboe@redhat.com>
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*/
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/*
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* objtool check:
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*
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* This command analyzes every .o file and ensures the validity of its stack
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* trace metadata. It enforces a set of rules on asm code and C inline
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* assembly code so that stack traces can be reliable.
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*
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* For more information, see tools/objtool/Documentation/stack-validation.txt.
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*/
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#include <subcmd/parse-options.h>
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#include <string.h>
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#include "builtin.h"
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#include "objtool.h"
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bool no_fp, no_unreachable, retpoline, module, backtrace, uaccess, stats, validate_dup, vmlinux;
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static const char * const check_usage[] = {
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"objtool check [<options>] file.o",
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NULL,
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};
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const struct option check_options[] = {
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OPT_BOOLEAN('f', "no-fp", &no_fp, "Skip frame pointer validation"),
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OPT_BOOLEAN('u', "no-unreachable", &no_unreachable, "Skip 'unreachable instruction' warnings"),
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OPT_BOOLEAN('r', "retpoline", &retpoline, "Validate retpoline assumptions"),
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OPT_BOOLEAN('m', "module", &module, "Indicates the object will be part of a kernel module"),
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OPT_BOOLEAN('b', "backtrace", &backtrace, "unwind on error"),
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OPT_BOOLEAN('a', "uaccess", &uaccess, "enable uaccess checking"),
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OPT_BOOLEAN('s', "stats", &stats, "print statistics"),
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OPT_BOOLEAN('d', "duplicate", &validate_dup, "duplicate validation for vmlinux.o"),
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OPT_BOOLEAN('l', "vmlinux", &vmlinux, "vmlinux.o validation"),
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OPT_END(),
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};
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int cmd_check(int argc, const char **argv)
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{
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const char *objname, *s;
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struct objtool_file *file;
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int ret;
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argc = parse_options(argc, argv, check_options, check_usage, 0);
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if (argc != 1)
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usage_with_options(check_usage, check_options);
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objname = argv[0];
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s = strstr(objname, "vmlinux.o");
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if (s && !s[9])
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vmlinux = true;
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file = objtool_open_read(objname);
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if (!file)
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return 1;
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ret = check(file);
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if (ret)
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return ret;
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if (file->elf->changed)
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return elf_write(file->elf);
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return 0;
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}
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