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//===-- dfsan_platform.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
//
//===----------------------------------------------------------------------===//
//
// This file is a part of DataFlowSanitizer.
//
// Platform specific information for DFSan.
//===----------------------------------------------------------------------===//
#ifndef DFSAN_PLATFORM_H
#define DFSAN_PLATFORM_H
namespace __dfsan {
#if defined(__x86_64__)
struct Mapping {
static const uptr kShadowAddr = 0x10000;
static const uptr kUnionTableAddr = 0x200000000000;
static const uptr kAppAddr = 0x700000008000;
static const uptr kShadowMask = ~0x700000000000;
};
#elif defined(__mips64)
struct Mapping {
static const uptr kShadowAddr = 0x10000;
static const uptr kUnionTableAddr = 0x2000000000;
static const uptr kAppAddr = 0xF000008000;
static const uptr kShadowMask = ~0xF000000000;
};
#elif defined(__aarch64__)
struct Mapping39 {
static const uptr kShadowAddr = 0x10000;
static const uptr kUnionTableAddr = 0x1000000000;
static const uptr kAppAddr = 0x7000008000;
static const uptr kShadowMask = ~0x7800000000;
};
struct Mapping42 {
static const uptr kShadowAddr = 0x10000;
static const uptr kUnionTableAddr = 0x8000000000;
static const uptr kAppAddr = 0x3ff00008000;
static const uptr kShadowMask = ~0x3c000000000;
};
struct Mapping48 {
static const uptr kShadowAddr = 0x10000;
static const uptr kUnionTableAddr = 0x8000000000;
static const uptr kAppAddr = 0xffff00008000;
static const uptr kShadowMask = ~0xfffff0000000;
};
extern int vmaSize;
# define DFSAN_RUNTIME_VMA 1
#else
# error "DFSan not supported for this platform!"
#endif
enum MappingType {
MAPPING_SHADOW_ADDR,
MAPPING_UNION_TABLE_ADDR,
MAPPING_APP_ADDR,
MAPPING_SHADOW_MASK
};
template<typename Mapping, int Type>
uptr MappingImpl(void) {
switch (Type) {
case MAPPING_SHADOW_ADDR: return Mapping::kShadowAddr;
case MAPPING_UNION_TABLE_ADDR: return Mapping::kUnionTableAddr;
case MAPPING_APP_ADDR: return Mapping::kAppAddr;
case MAPPING_SHADOW_MASK: return Mapping::kShadowMask;
}
}
template<int Type>
uptr MappingArchImpl(void) {
#ifdef __aarch64__
switch (vmaSize) {
case 39: return MappingImpl<Mapping39, Type>();
case 42: return MappingImpl<Mapping42, Type>();
case 48: return MappingImpl<Mapping48, Type>();
}
DCHECK(0);
return 0;
#else
return MappingImpl<Mapping, Type>();
#endif
}
ALWAYS_INLINE
uptr ShadowAddr() {
return MappingArchImpl<MAPPING_SHADOW_ADDR>();
}
ALWAYS_INLINE
uptr UnionTableAddr() {
return MappingArchImpl<MAPPING_UNION_TABLE_ADDR>();
}
ALWAYS_INLINE
uptr AppAddr() {
return MappingArchImpl<MAPPING_APP_ADDR>();
}
ALWAYS_INLINE
uptr ShadowMask() {
return MappingArchImpl<MAPPING_SHADOW_MASK>();
}
} // namespace __dfsan
#endif
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