1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __LKDTM_H
3#define __LKDTM_H
4
5#define pr_fmt(fmt) "lkdtm: " fmt
6
7#include <linux/kernel.h>
8
9extern char *lkdtm_kernel_info;
10
11#define pr_expected_config(kconfig) \
12do { \
13 if (IS_ENABLED(kconfig)) \
14 pr_err("Unexpected! This %s was built with " #kconfig "=y\n", \
15 lkdtm_kernel_info); \
16 else \
17 pr_warn("This is probably expected, since this %s was built *without* " #kconfig "=y\n", \
18 lkdtm_kernel_info); \
19} while (0)
20
21#ifndef MODULE
22int lkdtm_check_bool_cmdline(const char *param);
23#define pr_expected_config_param(kconfig, param) \
24do { \
25 if (IS_ENABLED(kconfig)) { \
26 switch (lkdtm_check_bool_cmdline(param)) { \
27 case 0: \
28 pr_warn("This is probably expected, since this %s was built with " #kconfig "=y but booted with '" param "=N'\n", \
29 lkdtm_kernel_info); \
30 break; \
31 case 1: \
32 pr_err("Unexpected! This %s was built with " #kconfig "=y and booted with '" param "=Y'\n", \
33 lkdtm_kernel_info); \
34 break; \
35 default: \
36 pr_err("Unexpected! This %s was built with " #kconfig "=y (and booted without '" param "' specified)\n", \
37 lkdtm_kernel_info); \
38 } \
39 } else { \
40 switch (lkdtm_check_bool_cmdline(param)) { \
41 case 0: \
42 pr_warn("This is probably expected, as this %s was built *without* " #kconfig "=y and booted with '" param "=N'\n", \
43 lkdtm_kernel_info); \
44 break; \
45 case 1: \
46 pr_err("Unexpected! This %s was built *without* " #kconfig "=y but booted with '" param "=Y'\n", \
47 lkdtm_kernel_info); \
48 break; \
49 default: \
50 pr_err("This is probably expected, since this %s was built *without* " #kconfig "=y (and booted without '" param "' specified)\n", \
51 lkdtm_kernel_info); \
52 break; \
53 } \
54 } \
55} while (0)
56#else
57#define pr_expected_config_param(kconfig, param) pr_expected_config(kconfig)
58#endif
59
60/* Crash types. */
61struct crashtype {
62 const char *name;
63 void (*func)(void);
64};
65
66#define CRASHTYPE(_name) \
67 { \
68 .name = __stringify(_name), \
69 .func = lkdtm_ ## _name, \
70 }
71
72/* Category's collection of crashtypes. */
73struct crashtype_category {
74 struct crashtype *crashtypes;
75 size_t len;
76};
77
78/* Each category's crashtypes list. */
79extern struct crashtype_category bugs_crashtypes;
80extern struct crashtype_category heap_crashtypes;
81extern struct crashtype_category perms_crashtypes;
82extern struct crashtype_category refcount_crashtypes;
83extern struct crashtype_category usercopy_crashtypes;
84extern struct crashtype_category stackleak_crashtypes;
85extern struct crashtype_category cfi_crashtypes;
86extern struct crashtype_category fortify_crashtypes;
87extern struct crashtype_category powerpc_crashtypes;
88
89/* Each category's init/exit routines. */
90void __init lkdtm_bugs_init(int *recur_param);
91void __init lkdtm_heap_init(void);
92void __exit lkdtm_heap_exit(void);
93void __init lkdtm_perms_init(void);
94void __init lkdtm_usercopy_init(void);
95void __exit lkdtm_usercopy_exit(void);
96
97/* Special declaration for function-in-rodata. */
98void lkdtm_rodata_do_nothing(void);
99
100#endif
101

source code of linux/drivers/misc/lkdtm/lkdtm.h