| //===-- hwasan_mapping.h ----------------------------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| /// |
| /// \file |
| /// This file is a part of HWAddressSanitizer and defines memory mapping. |
| /// |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef HWASAN_MAPPING_H |
| #define HWASAN_MAPPING_H |
| |
| #include "sanitizer_common/sanitizer_internal_defs.h" |
| #include "hwasan_interface_internal.h" |
| |
| // Typical mapping on Linux/x86_64: |
| // with dynamic shadow mapped at [0x770d59f40000, 0x7f0d59f40000]: |
| // || [0x7f0d59f40000, 0x7fffffffffff] || HighMem || |
| // || [0x7efe2f934000, 0x7f0d59f3ffff] || HighShadow || |
| // || [0x7e7e2f934000, 0x7efe2f933fff] || ShadowGap || |
| // || [0x770d59f40000, 0x7e7e2f933fff] || LowShadow || |
| // || [0x000000000000, 0x770d59f3ffff] || LowMem || |
| |
| // Typical mapping on Android/AArch64 |
| // with dynamic shadow mapped: [0x007477480000, 0x007c77480000]: |
| // || [0x007c77480000, 0x007fffffffff] || HighMem || |
| // || [0x007c3ebc8000, 0x007c7747ffff] || HighShadow || |
| // || [0x007bbebc8000, 0x007c3ebc7fff] || ShadowGap || |
| // || [0x007477480000, 0x007bbebc7fff] || LowShadow || |
| // || [0x000000000000, 0x00747747ffff] || LowMem || |
| |
| // Reasonable values are 4 (for 1/16th shadow) and 6 (for 1/64th). |
| constexpr uptr kShadowScale = 4; |
| constexpr uptr kShadowAlignment = 1ULL << kShadowScale; |
| |
| namespace __hwasan { |
| |
| extern uptr kLowMemStart; |
| extern uptr kLowMemEnd; |
| extern uptr kLowShadowEnd; |
| extern uptr kLowShadowStart; |
| extern uptr kHighShadowStart; |
| extern uptr kHighShadowEnd; |
| extern uptr kHighMemStart; |
| extern uptr kHighMemEnd; |
| |
| inline uptr MemToShadow(uptr untagged_addr) { |
| return (untagged_addr >> kShadowScale) + |
| __hwasan_shadow_memory_dynamic_address; |
| } |
| inline uptr ShadowToMem(uptr shadow_addr) { |
| return (shadow_addr - __hwasan_shadow_memory_dynamic_address) << kShadowScale; |
| } |
| inline uptr MemToShadowSize(uptr size) { |
| return size >> kShadowScale; |
| } |
| |
| bool MemIsApp(uptr p); |
| |
| } // namespace __hwasan |
| |
| #endif // HWASAN_MAPPING_H |