compiler-rt/lib/dfsan/dfsan_platform.h

   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