1 //===-- dfsan_platform.h ----------------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file is a part of DataFlowSanitizer. 11 // 12 // Platform specific information for DFSan. 13 //===----------------------------------------------------------------------===// 14 15 #ifndef DFSAN_PLATFORM_H 16 #define DFSAN_PLATFORM_H 17 18 namespace __dfsan { 19 20 #if defined(__x86_64__) 21 struct Mapping { 22 static const uptr kShadowAddr = 0x10000; 23 static const uptr kUnionTableAddr = 0x200000000000; 24 static const uptr kAppAddr = 0x700000008000; 25 static const uptr kShadowMask = ~0x700000000000; 26 }; 27 #elif defined(__mips64) 28 struct Mapping { 29 static const uptr kShadowAddr = 0x10000; 30 static const uptr kUnionTableAddr = 0x2000000000; 31 static const uptr kAppAddr = 0xF000008000; 32 static const uptr kShadowMask = ~0xF000000000; 33 }; 34 #elif defined(__aarch64__) 35 struct Mapping39 { 36 static const uptr kShadowAddr = 0x10000; 37 static const uptr kUnionTableAddr = 0x1000000000; 38 static const uptr kAppAddr = 0x7000008000; 39 static const uptr kShadowMask = ~0x7800000000; 40 }; 41 42 struct Mapping42 { 43 static const uptr kShadowAddr = 0x10000; 44 static const uptr kUnionTableAddr = 0x8000000000; 45 static const uptr kAppAddr = 0x3ff00008000; 46 static const uptr kShadowMask = ~0x3c000000000; 47 }; 48 49 extern int vmaSize; 50 # define DFSAN_RUNTIME_VMA 1 51 #else 52 # error "DFSan not supported for this platform!" 53 #endif 54 55 enum MappingType { 56 MAPPING_SHADOW_ADDR, 57 MAPPING_UNION_TABLE_ADDR, 58 MAPPING_APP_ADDR, 59 MAPPING_SHADOW_MASK 60 }; 61 62 template<typename Mapping, int Type> MappingImpl(void)63uptr MappingImpl(void) { 64 switch (Type) { 65 case MAPPING_SHADOW_ADDR: return Mapping::kShadowAddr; 66 case MAPPING_UNION_TABLE_ADDR: return Mapping::kUnionTableAddr; 67 case MAPPING_APP_ADDR: return Mapping::kAppAddr; 68 case MAPPING_SHADOW_MASK: return Mapping::kShadowMask; 69 } 70 } 71 72 template<int Type> MappingArchImpl(void)73uptr MappingArchImpl(void) { 74 #ifdef __aarch64__ 75 if (vmaSize == 39) 76 return MappingImpl<Mapping39, Type>(); 77 else 78 return MappingImpl<Mapping42, Type>(); 79 DCHECK(0); 80 #else 81 return MappingImpl<Mapping, Type>(); 82 #endif 83 } 84 85 ALWAYS_INLINE ShadowAddr()86uptr ShadowAddr() { 87 return MappingArchImpl<MAPPING_SHADOW_ADDR>(); 88 } 89 90 ALWAYS_INLINE UnionTableAddr()91uptr UnionTableAddr() { 92 return MappingArchImpl<MAPPING_UNION_TABLE_ADDR>(); 93 } 94 95 ALWAYS_INLINE AppAddr()96uptr AppAddr() { 97 return MappingArchImpl<MAPPING_APP_ADDR>(); 98 } 99 100 ALWAYS_INLINE ShadowMask()101uptr ShadowMask() { 102 return MappingArchImpl<MAPPING_SHADOW_MASK>(); 103 } 104 105 } // namespace __dfsan 106 107 #endif 108