1 //===-- dfsan_platform.h ----------------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file is a part of DataFlowSanitizer. 10 // 11 // Platform specific information for DFSan. 12 //===----------------------------------------------------------------------===// 13 14 #ifndef DFSAN_PLATFORM_H 15 #define DFSAN_PLATFORM_H 16 17 namespace __dfsan { 18 19 #if defined(__x86_64__) 20 struct Mapping { 21 static const uptr kShadowAddr = 0x10000; 22 static const uptr kUnionTableAddr = 0x200000000000; 23 static const uptr kAppAddr = 0x700000008000; 24 static const uptr kShadowMask = ~0x700000000000; 25 }; 26 #elif defined(__mips64) 27 struct Mapping { 28 static const uptr kShadowAddr = 0x10000; 29 static const uptr kUnionTableAddr = 0x2000000000; 30 static const uptr kAppAddr = 0xF000008000; 31 static const uptr kShadowMask = ~0xF000000000; 32 }; 33 #elif defined(__aarch64__) 34 struct Mapping39 { 35 static const uptr kShadowAddr = 0x10000; 36 static const uptr kUnionTableAddr = 0x1000000000; 37 static const uptr kAppAddr = 0x7000008000; 38 static const uptr kShadowMask = ~0x7800000000; 39 }; 40 41 struct Mapping42 { 42 static const uptr kShadowAddr = 0x10000; 43 static const uptr kUnionTableAddr = 0x8000000000; 44 static const uptr kAppAddr = 0x3ff00008000; 45 static const uptr kShadowMask = ~0x3c000000000; 46 }; 47 48 struct Mapping48 { 49 static const uptr kShadowAddr = 0x10000; 50 static const uptr kUnionTableAddr = 0x8000000000; 51 static const uptr kAppAddr = 0xffff00008000; 52 static const uptr kShadowMask = ~0xfffff0000000; 53 }; 54 55 extern int vmaSize; 56 # define DFSAN_RUNTIME_VMA 1 57 #else 58 # error "DFSan not supported for this platform!" 59 #endif 60 61 enum MappingType { 62 MAPPING_SHADOW_ADDR, 63 MAPPING_UNION_TABLE_ADDR, 64 MAPPING_APP_ADDR, 65 MAPPING_SHADOW_MASK 66 }; 67 68 template<typename Mapping, int Type> 69 uptr MappingImpl(void) { 70 switch (Type) { 71 case MAPPING_SHADOW_ADDR: return Mapping::kShadowAddr; 72 case MAPPING_UNION_TABLE_ADDR: return Mapping::kUnionTableAddr; 73 case MAPPING_APP_ADDR: return Mapping::kAppAddr; 74 case MAPPING_SHADOW_MASK: return Mapping::kShadowMask; 75 } 76 } 77 78 template<int Type> 79 uptr MappingArchImpl(void) { 80 #ifdef __aarch64__ 81 switch (vmaSize) { 82 case 39: return MappingImpl<Mapping39, Type>(); 83 case 42: return MappingImpl<Mapping42, Type>(); 84 case 48: return MappingImpl<Mapping48, Type>(); 85 } 86 DCHECK(0); 87 return 0; 88 #else 89 return MappingImpl<Mapping, Type>(); 90 #endif 91 } 92 93 ALWAYS_INLINE 94 uptr ShadowAddr() { 95 return MappingArchImpl<MAPPING_SHADOW_ADDR>(); 96 } 97 98 ALWAYS_INLINE 99 uptr UnionTableAddr() { 100 return MappingArchImpl<MAPPING_UNION_TABLE_ADDR>(); 101 } 102 103 ALWAYS_INLINE 104 uptr AppAddr() { 105 return MappingArchImpl<MAPPING_APP_ADDR>(); 106 } 107 108 ALWAYS_INLINE 109 uptr ShadowMask() { 110 return MappingArchImpl<MAPPING_SHADOW_MASK>(); 111 } 112 113 } // namespace __dfsan 114 115 #endif 116