Quelle  lkdtm.h   Sprache: C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LKDTM_H
#define __LKDTM_H

#define pr_fmt(fmt) "lkdtm: " fmt

#include <linux/kernel.h>

extern char *lkdtm_kernel_info;

#define pr_expected_config(kconfig)    \
do {        \
 if (IS_ENABLED(kconfig))     \
  pr_err("Unexpected! This %s was built with " #kconfig "=y\n", \
   lkdtm_kernel_info);   \
 else       \
  pr_warn("This is probably expected, since this %s was built *without* " #kconfig "=y\n", \
   lkdtm_kernel_info);   \
} while (0)

#ifndef MODULE
int lkdtm_check_bool_cmdline(const char *param);
#define pr_expected_config_param(kconfig, param)  \
do {        \
 if (IS_ENABLED(kconfig)) {    \
  switch (lkdtm_check_bool_cmdline(param)) { \
  case 0:      \
   pr_warn("This is probably expected, since this %s was built with " #kconfig "=y but booted with '" param "=N'\n", \
    lkdtm_kernel_info);  \
   break;     \
  case 1:      \
   pr_err("Unexpected! This %s was built with " #kconfig "=y and booted with '" param "=Y'\n", \
    lkdtm_kernel_info);  \
   break;     \
  default:     \
   pr_err("Unexpected! This %s was built with " #kconfig "=y (and booted without '" param "' specified)\n", \
    lkdtm_kernel_info);  \
  }      \
 } else {      \
  switch (lkdtm_check_bool_cmdline(param)) { \
  case 0:      \
   pr_warn("This is probably expected, as this %s was built *without* " #kconfig "=y and booted with '" param "=N'\n", \
    lkdtm_kernel_info);  \
   break;     \
  case 1:      \
   pr_err("Unexpected! This %s was built *without* " #kconfig "=y but booted with '" param "=Y'\n", \
    lkdtm_kernel_info);  \
   break;     \
  default:     \
   pr_err("This is probably expected, since this %s was built *without* " #kconfig "=y (and booted without '" param "' specified)\n", \
    lkdtm_kernel_info);  \
   break;     \
  }      \
 }       \
} while (0)
#else
#define pr_expected_config_param(kconfig, param) pr_expected_config(kconfig)
#endif

/* Crash types. */
struct crashtype {
 const char *name;
 void (*func)(void);
};

#define CRASHTYPE(_name)   \
 {     \
  .name = __stringify(_name), \
  .func = lkdtm_ ## _name, \
 }

/* Category's collection of crashtypes. */
struct crashtype_category {
 struct crashtype *crashtypes;
 size_t len;
};

/* Each category's crashtypes list. */
extern struct crashtype_category bugs_crashtypes;
extern struct crashtype_category heap_crashtypes;
extern struct crashtype_category perms_crashtypes;
extern struct crashtype_category refcount_crashtypes;
extern struct crashtype_category usercopy_crashtypes;
extern struct crashtype_category stackleak_crashtypes;
extern struct crashtype_category cfi_crashtypes;
extern struct crashtype_category fortify_crashtypes;
extern struct crashtype_category powerpc_crashtypes;

/* Each category's init/exit routines. */
void __init lkdtm_bugs_init(int *recur_param);
void __init lkdtm_heap_init(void);
void __exit lkdtm_heap_exit(void);
void __init lkdtm_perms_init(void);
void __init lkdtm_usercopy_init(void);
void __exit lkdtm_usercopy_exit(void);

/* Special declaration for function-in-rodata. */
void lkdtm_rodata_do_nothing(void);

#endif