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 17namespace __dfsan { 18 19#if defined(__x86_64__) 20struct 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) 27struct 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__) 34struct 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 41struct 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 48struct 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 55extern int vmaSize; 56# define DFSAN_RUNTIME_VMA 1 57#else 58# error "DFSan not supported for this platform!" 59#endif 60 61enum MappingType { 62 MAPPING_SHADOW_ADDR, 63 MAPPING_UNION_TABLE_ADDR, 64 MAPPING_APP_ADDR, 65 MAPPING_SHADOW_MASK 66}; 67 68template<typename Mapping, int Type> 69uptr 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 78template<int Type> 79uptr 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 93ALWAYS_INLINE 94uptr ShadowAddr() { 95 return MappingArchImpl<MAPPING_SHADOW_ADDR>(); 96} 97 98ALWAYS_INLINE 99uptr UnionTableAddr() { 100 return MappingArchImpl<MAPPING_UNION_TABLE_ADDR>(); 101} 102 103ALWAYS_INLINE 104uptr AppAddr() { 105 return MappingArchImpl<MAPPING_APP_ADDR>(); 106} 107 108ALWAYS_INLINE 109uptr ShadowMask() { 110 return MappingArchImpl<MAPPING_SHADOW_MASK>(); 111} 112 113} // namespace __dfsan 114 115#endif 116