san/kasan.h

   1 /*
   2  * Copyright (c) 2000-2016 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #ifndef _KASAN_H_
  30 #define _KASAN_H_
  31
  32 #if KERNEL_PRIVATE
  33
  34 #if KASAN && !__has_feature(address_sanitizer)
  35 # error "KASAN selected, but not enabled in compiler"
  36 #endif
  37
  38 #if !KASAN && __has_feature(address_sanitizer)
  39 # error "ASAN enabled in compiler, but kernel is not configured for KASAN"
  40 #endif
  41
  42 #define KASAN_GLOBAL_SEGNAME  "__DATA"
  43 #define KASAN_GLOBAL_SECTNAME "__asan_globals"
  44
  45 typedef uintptr_t uptr;
  46
  47 #if KASAN
  48
  49 #define KASAN_KALLOC 1
  50 #define KASAN_ZALLOC 1
  51 #define KASAN_DYNAMIC_BLACKLIST 1
  52
  53 #define KASAN_GUARD_SIZE (16)
  54 #define KASAN_GUARD_PAD  (KASAN_GUARD_SIZE * 2)
  55
  56 #define KASAN_HEAP_ZALLOC    0
  57 #define KASAN_HEAP_KALLOC    1
  58 #define KASAN_HEAP_FAKESTACK 2
  59 #define KASAN_HEAP_TYPES     3
  60
  61 /* shadow map byte values */
  62 #define ASAN_VALID          0x00
  63 #define ASAN_PARTIAL1       0x01
  64 #define ASAN_PARTIAL2       0x02
  65 #define ASAN_PARTIAL3       0x03
  66 #define ASAN_PARTIAL4       0x04
  67 #define ASAN_PARTIAL5       0x05
  68 #define ASAN_PARTIAL6       0x06
  69 #define ASAN_PARTIAL7       0x07
  70 #define ASAN_ARRAY_COOKIE   0xac
  71 #define ASAN_STACK_RZ       0xf0
  72 #define ASAN_STACK_LEFT_RZ  0xf1
  73 #define ASAN_STACK_MID_RZ   0xf2
  74 #define ASAN_STACK_RIGHT_RZ 0xf3
  75 #define ASAN_STACK_FREED    0xf5
  76 #define ASAN_STACK_OOSCOPE  0xf8
  77 #define ASAN_GLOBAL_RZ      0xf9
  78 #define ASAN_HEAP_RZ        0xe9
  79 #define ASAN_HEAP_LEFT_RZ   0xfa
  80 #define ASAN_HEAP_RIGHT_RZ  0xfb
  81 #define ASAN_HEAP_FREED     0xfd
  82
  83 /*
  84  * KASAN internal interface
  85  */
  86
  87 __BEGIN_DECLS
  88 void kasan_map_shadow(vm_offset_t address, vm_size_t size, bool is_zero);
  89 void kasan_disable(void);
  90 void kasan_reserve_memory(void *);
  91 void kasan_late_init(void);
  92 void kasan_init(void);
  93 void kasan_notify_stolen(vm_offset_t top);
  94
  95 void kasan_load_kext(vm_offset_t base, vm_size_t size, const void *bundleid);
  96 void kasan_unload_kext(vm_offset_t base, vm_size_t size);
  97
  98 void kasan_poison_range(vm_offset_t base, vm_size_t sz, uint8_t flags);
  99 void kasan_notify_address(vm_offset_t address, vm_size_t size);
 100 void kasan_notify_address_nopoison(vm_offset_t address, vm_size_t size);
 101 void kasan_unpoison_stack(vm_offset_t stack, vm_size_t size);
 102 void kasan_unpoison_fakestack(thread_t thread);
 103
 104 struct kasan_test;
 105 void __kasan_runtests(struct kasan_test *, int numtests);
 106
 107 #if XNU_KERNEL_PRIVATE
 108 extern long shadow_pages_total;
 109
 110 #if __arm64__
 111 void kasan_notify_address_zero(vm_offset_t, vm_size_t);
 112 #elif __x86_64__
 113 extern void kasan_map_low_fixed_regions(void);
 114 extern unsigned shadow_stolen_idx;
 115 extern vm_offset_t shadow_pnext, shadow_ptop;
 116 #endif
 117 #endif
 118 /*
 119  * Allocator hooks
 120  */
 121
 122 vm_size_t kasan_alloc_resize(vm_size_t size);
 123 vm_size_t kasan_user_size(vm_offset_t addr);
 124
 125 vm_address_t kasan_alloc(vm_offset_t addr, vm_size_t size, vm_size_t req, vm_size_t leftrz);
 126 vm_address_t kasan_dealloc(vm_offset_t addr, vm_size_t *size);
 127
 128 void kasan_check_free(vm_offset_t addr, vm_size_t size, unsigned type);
 129 void kasan_free(void **addr, vm_size_t *size, int type, zone_t *zone, vm_size_t user_size, bool doquarantine);
 130
 131 __END_DECLS
 132
 133 /* thread interface */
 134 struct kasan_thread_data {
 135         int in_fakestack;
 136         LIST_HEAD(fakestack_header_list, fakestack_header) fakestack_head;
 137 };
 138 struct kasan_thread_data *kasan_get_thread_data(thread_t);
 139 void kasan_init_thread(struct kasan_thread_data *);
 140
 141 #endif /* KASAN */
 142
 143 #if __has_feature(address_sanitizer)
 144 # define NOKASAN __attribute__ ((no_sanitize_address))
 145 #else
 146 # define NOKASAN
 147 #endif
 148
 149 /*
 150  * Delimit areas of code that may do kasan-unsafe operations
 151  */
 152 __BEGIN_DECLS
 153 #if KASAN
 154 void kasan_unsafe_start(void);
 155 void kasan_unsafe_end(void);
 156 #else
 157 static inline void kasan_unsafe_start(void) {}
 158 static inline void kasan_unsafe_end(void) {}
 159 #endif
 160 __END_DECLS
 161
 162 /*
 163  * ASAN callbacks - inserted by the compiler
 164  */
 165
 166 extern int __asan_option_detect_stack_use_after_return;
 167 extern const uintptr_t __asan_shadow_memory_dynamic_address;
 168
 169 __BEGIN_DECLS
 170 void __asan_report_load1(uptr p);
 171 void __asan_report_load2(uptr p);
 172 void __asan_report_load4(uptr p);
 173 void __asan_report_load8(uptr p);
 174 void __asan_report_load16(uptr p);
 175 void __asan_report_store1(uptr p);
 176 void __asan_report_store2(uptr p);
 177 void __asan_report_store4(uptr p);
 178 void __asan_report_store8(uptr p);
 179 void __asan_report_store16(uptr p);
 180 void __asan_report_load_n(uptr p, unsigned long size);
 181 void __asan_report_store_n(uptr p, unsigned long size);
 182 void __asan_handle_no_return(void);
 183 uptr __asan_stack_malloc_0(size_t);
 184 uptr __asan_stack_malloc_1(size_t);
 185 uptr __asan_stack_malloc_2(size_t);
 186 uptr __asan_stack_malloc_3(size_t);
 187 uptr __asan_stack_malloc_4(size_t);
 188 uptr __asan_stack_malloc_5(size_t);
 189 uptr __asan_stack_malloc_6(size_t);
 190 uptr __asan_stack_malloc_7(size_t);
 191 uptr __asan_stack_malloc_8(size_t);
 192 uptr __asan_stack_malloc_9(size_t);
 193 uptr __asan_stack_malloc_10(size_t);
 194 void __asan_stack_free_0(uptr, size_t);
 195 void __asan_stack_free_1(uptr, size_t);
 196 void __asan_stack_free_2(uptr, size_t);
 197 void __asan_stack_free_3(uptr, size_t);
 198 void __asan_stack_free_4(uptr, size_t);
 199 void __asan_stack_free_5(uptr, size_t);
 200 void __asan_stack_free_6(uptr, size_t);
 201 void __asan_stack_free_7(uptr, size_t);
 202 void __asan_stack_free_8(uptr, size_t);
 203 void __asan_stack_free_9(uptr, size_t);
 204 void __asan_stack_free_10(uptr, size_t);
 205 void __asan_poison_cxx_array_cookie(uptr);
 206 uptr __asan_load_cxx_array_cookie(uptr *);
 207 void __asan_poison_stack_memory(uptr addr, size_t size);
 208 void __asan_unpoison_stack_memory(uptr addr, size_t size);
 209 void __asan_alloca_poison(uptr addr, uptr size);
 210 void __asan_allocas_unpoison(uptr top, uptr bottom);
 211 void __asan_load1(uptr);
 212 void __asan_load2(uptr);
 213 void __asan_load4(uptr);
 214 void __asan_load8(uptr);
 215 void __asan_load16(uptr);
 216 void __asan_loadN(uptr, size_t);
 217 void __asan_store1(uptr);
 218 void __asan_store2(uptr);
 219 void __asan_store4(uptr);
 220 void __asan_store8(uptr);
 221 void __asan_store16(uptr);
 222 void __asan_storeN(uptr, size_t);
 223 void __sanitizer_ptr_sub(uptr a, uptr b);
 224 void __sanitizer_ptr_cmp(uptr a, uptr b);
 225 void __sanitizer_annotate_contiguous_container(const void *beg, const void *end, const void *old_mid, const void *new_mid);
 226
 227 void __asan_set_shadow_00(uptr, size_t);
 228 void __asan_set_shadow_f1(uptr, size_t);
 229 void __asan_set_shadow_f2(uptr, size_t);
 230 void __asan_set_shadow_f3(uptr, size_t);
 231 void __asan_set_shadow_f5(uptr, size_t);
 232 void __asan_set_shadow_f8(uptr, size_t);
 233
 234 void __asan_init_v5(void);
 235 void __asan_before_dynamic_init(uptr);
 236 void __asan_after_dynamic_init(void);
 237 void __asan_unregister_globals(uptr a, uptr b);
 238 void __asan_register_globals(uptr a, uptr b);
 239 void __asan_init(void);
 240 void __asan_unregister_image_globals(uptr);
 241 void __asan_register_image_globals(uptr);
 242 __END_DECLS
 243
 244 #endif /* KERNEL_PRIVATE */
 245 #endif /* _KASAN_H_ */