1 /* SPDX-License-Identifier: BSD-2-Clause */ 2 /* 3 * Copyright (c) 2016, Linaro Limited 4 */ 5 #ifndef __ASAN_H 6 #define __ASAN_H 7 8 #include <stdint.h> 9 10 #define ASAN_DATA_RED_ZONE -1 11 #define ASAN_HEAP_RED_ZONE -2 12 13 #define ASAN_BLOCK_SIZE U(8) 14 #define ASAN_BLOCK_SHIFT U(3) 15 #define ASAN_BLOCK_MASK (ASAN_BLOCK_SIZE - 1) 16 17 #ifndef __ASSEMBLER__ 18 #include <compiler.h> 19 #include <string.h> 20 #include <types_ext.h> 21 22 #define ASAN_VA_REGS_MAX 32 23 24 /* Represents memory mapped region */ 25 struct asan_va_reg { 26 vaddr_t lo; 27 vaddr_t hi; 28 }; 29 30 /* Global structure with ASan metadata */ 31 struct asan_global_info { 32 /* Virtual memory regions allowed for ASan checks */ 33 size_t regs_count; 34 struct asan_va_reg regs[ASAN_VA_REGS_MAX]; 35 /* Shadow memory regions */ 36 size_t s_regs_count; 37 struct asan_va_reg s_regs[ASAN_VA_REGS_MAX]; 38 }; 39 40 #ifdef __KERNEL__ 41 #define GET_ASAN_INFO() (&__asan_global_info) 42 #else 43 #define GET_ASAN_INFO() ((struct asan_global_info *) \ 44 (CFG_USER_ASAN_SHADOW_OFFSET - SMALL_PAGE_SIZE)) 45 #endif 46 47 #if ((defined(__KERNEL__) || defined(__LDELF__)) && \ 48 defined(CFG_CORE_SANITIZE_KADDRESS)) 49 #define ASAN_IS_ENABLED 1 50 #else 51 #define ASAN_IS_ENABLED 0 52 #endif 53 54 #if ASAN_IS_ENABLED 55 /* ASAN enabled */ 56 typedef void (*asan_panic_cb_t)(void); 57 58 void asan_add_shadowed(const void *va_begin, const void *va_end); 59 void asan_start(void); 60 void asan_panic(void); 61 void asan_set_panic_cb(asan_panic_cb_t panic_cb); 62 63 void asan_tag_no_access(const void *begin, const void *end); 64 void asan_tag_access(const void *begin, const void *end); 65 void asan_tag_heap_free(const void *begin, const void *end); 66 void *asan_memset_unchecked(void *s, int c, size_t n); 67 void *asan_memcpy_unchecked(void *__restrict s1, const void *__restrict s2, 68 size_t n); 69 int asan_user_map_shadow(void *lo, void *hi); 70 #else 71 static inline void asan_tag_no_access(const void *begin __unused, 72 const void *end __unused) 73 { 74 } 75 static inline void asan_tag_access(const void *begin __unused, 76 const void *end __unused) 77 { 78 } 79 static inline void asan_tag_heap_free(const void *begin __unused, 80 const void *end __unused) 81 { 82 } 83 84 static inline void *asan_memset_unchecked(void *s, int c, size_t n) 85 { 86 return memset(s, c, n); 87 } 88 89 static inline void *asan_memcpy_unchecked(void *__restrict s1, 90 const void *__restrict s2, size_t n) 91 { 92 return memcpy(s1, s2, n); 93 } 94 95 static inline void asan_start(void) 96 { 97 } 98 99 static inline int asan_user_map_shadow(void *lo __unused, void *hi __unused) 100 { 101 return 0; 102 } 103 #endif /* ASAN_IS_ENABLED */ 104 105 #endif /*__ASSEMBLER__*/ 106 #endif /*__ASAN_H*/ 107