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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
58 lines
2.0 KiB
C++
58 lines
2.0 KiB
C++
//===-- hwasan_mapping.h ----------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// This file is a part of HWAddressSanitizer and defines memory mapping.
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///
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//===----------------------------------------------------------------------===//
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#ifndef HWASAN_MAPPING_H
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#define HWASAN_MAPPING_H
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#include "sanitizer_common/sanitizer_internal_defs.h"
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#include "hwasan_interface_internal.h"
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// Typical mapping on Linux/x86_64:
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// with dynamic shadow mapped at [0x770d59f40000, 0x7f0d59f40000]:
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// || [0x7f0d59f40000, 0x7fffffffffff] || HighMem ||
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// || [0x7efe2f934000, 0x7f0d59f3ffff] || HighShadow ||
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// || [0x7e7e2f934000, 0x7efe2f933fff] || ShadowGap ||
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// || [0x770d59f40000, 0x7e7e2f933fff] || LowShadow ||
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// || [0x000000000000, 0x770d59f3ffff] || LowMem ||
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// Typical mapping on Android/AArch64
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// with dynamic shadow mapped: [0x007477480000, 0x007c77480000]:
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// || [0x007c77480000, 0x007fffffffff] || HighMem ||
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// || [0x007c3ebc8000, 0x007c7747ffff] || HighShadow ||
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// || [0x007bbebc8000, 0x007c3ebc7fff] || ShadowGap ||
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// || [0x007477480000, 0x007bbebc7fff] || LowShadow ||
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// || [0x000000000000, 0x00747747ffff] || LowMem ||
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// Reasonable values are 4 (for 1/16th shadow) and 6 (for 1/64th).
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constexpr uptr kShadowScale = 4;
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constexpr uptr kShadowAlignment = 1ULL << kShadowScale;
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namespace __hwasan {
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inline uptr MemToShadow(uptr untagged_addr) {
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return (untagged_addr >> kShadowScale) +
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__hwasan_shadow_memory_dynamic_address;
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}
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inline uptr ShadowToMem(uptr shadow_addr) {
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return (shadow_addr - __hwasan_shadow_memory_dynamic_address) << kShadowScale;
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}
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inline uptr MemToShadowSize(uptr size) {
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return size >> kShadowScale;
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}
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bool MemIsApp(uptr p);
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} // namespace __hwasan
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#endif // HWASAN_MAPPING_H
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