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 18namespace __dfsan { 19 20#if defined(__x86_64__) 21struct 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) 28struct 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__) 35struct 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 42struct 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 49extern int vmaSize; 50# define DFSAN_RUNTIME_VMA 1 51#else 52# error "DFSan not supported for this platform!" 53#endif 54 55enum MappingType { 56 MAPPING_SHADOW_ADDR, 57 MAPPING_UNION_TABLE_ADDR, 58 MAPPING_APP_ADDR, 59 MAPPING_SHADOW_MASK 60}; 61 62template<typename Mapping, int Type> 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 72template<int Type> 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 85ALWAYS_INLINE 86uptr ShadowAddr() { 87 return MappingArchImpl<MAPPING_SHADOW_ADDR>(); 88} 89 90ALWAYS_INLINE 91uptr UnionTableAddr() { 92 return MappingArchImpl<MAPPING_UNION_TABLE_ADDR>(); 93} 94 95ALWAYS_INLINE 96uptr AppAddr() { 97 return MappingArchImpl<MAPPING_APP_ADDR>(); 98} 99 100ALWAYS_INLINE 101uptr ShadowMask() { 102 return MappingArchImpl<MAPPING_SHADOW_MASK>(); 103} 104 105} // namespace __dfsan 106 107#endif 108