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More flexible memory manager (#307)

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* Keep track mapped buffers with fixed offsets

* Started rewriting the memory manager

* Initial support for MapPhysicalMemory and UnmapPhysicalMemory, other tweaks

* MapPhysicalMemory/UnmapPhysicalMemory support, other tweaks

* Rebased

* Optimize the map/unmap physical memory svcs

* Integrate shared font support

* Fix address space reserve alignment

* Some fixes related to gpu memory mapping

* Some cleanup

* Only try uploading const buffers that are really used

* Check if memory region is contiguous

* Rebased

* Add missing count increment on IsRegionModified

* Check for reads/writes outside of the address space, optimize translation with a tail call
This commit is contained in:
gdkchan 2018-08-15 15:59:51 -03:00 committed by GitHub
parent 9f004c3139
commit 178effbad9
10 changed files with 358 additions and 860 deletions
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2
AOptimizations.cs
View file

@ -2,8 +2,6 @@ using System.Runtime.Intrinsics.X86;
public static class AOptimizations
{
public static bool DisableMemoryChecks = false;
public static bool GenerateCallStack = true;
private static bool UseAllSseIfAvailable = true;

14
Exceptions/VmmAccessViolationException.cs
View file

@ -1,14 +0,0 @@
using ChocolArm64.Memory;
using System;
namespace ChocolArm64.Exceptions
{
public class VmmAccessViolationException : Exception
{
private const string ExMsg = "Address 0x{0:x16} does not have \"{1}\" permission!";
public VmmAccessViolationException() { }
public VmmAccessViolationException(long Position, AMemoryPerm Perm) : base(string.Format(ExMsg, Position, Perm)) { }
}
}

8
Exceptions/VmmOutOfMemoryException.cs
View file

@ -2,12 +2,12 @@ using System;
namespace ChocolArm64.Exceptions
{
public class VmmOutOfMemoryException : Exception
public class VmmAccessException : Exception
{
private const string ExMsg = "Failed to allocate {0} bytes of memory!";
private const string ExMsg = "Memory region at 0x{0} with size 0x{1} is not contiguous!";
public VmmOutOfMemoryException() { }
public VmmAccessException() { }
public VmmOutOfMemoryException(long Size) : base(string.Format(ExMsg, Size)) { }
public VmmAccessException(long Position, long Size) : base(string.Format(ExMsg, Position, Size)) { }
}
}

86
Instruction/AInstEmitMemoryHelper.cs
View file

@ -45,46 +45,21 @@ namespace ChocolArm64.Instruction
{
switch (Size)
{
case 0: Name = AOptimizations.DisableMemoryChecks
? nameof(AMemory.ReadVector8Unchecked)
: nameof(AMemory.ReadVector8); break;
case 1: Name = AOptimizations.DisableMemoryChecks
? nameof(AMemory.ReadVector16Unchecked)
: nameof(AMemory.ReadVector16); break;
case 2: Name = AOptimizations.DisableMemoryChecks
? nameof(AMemory.ReadVector32Unchecked)
: nameof(AMemory.ReadVector32); break;
case 3: Name = AOptimizations.DisableMemoryChecks
? nameof(AMemory.ReadVector64Unchecked)
: nameof(AMemory.ReadVector64); break;
case 4: Name = AOptimizations.DisableMemoryChecks
? nameof(AMemory.ReadVector128Unchecked)
: nameof(AMemory.ReadVector128); break;
case 0: Name = nameof(AMemory.ReadVector8); break;
case 1: Name = nameof(AMemory.ReadVector16); break;
case 2: Name = nameof(AMemory.ReadVector32); break;
case 3: Name = nameof(AMemory.ReadVector64); break;
case 4: Name = nameof(AMemory.ReadVector128); break;
}
}
else
{
switch (Size)
{
case 0: Name = AOptimizations.DisableMemoryChecks
? nameof(AMemory.ReadByteUnchecked)
: nameof(AMemory.ReadByte); break;
case 1: Name = AOptimizations.DisableMemoryChecks
? nameof(AMemory.ReadUInt16Unchecked)
: nameof(AMemory.ReadUInt16); break;
case 2: Name = AOptimizations.DisableMemoryChecks
? nameof(AMemory.ReadUInt32Unchecked)
: nameof(AMemory.ReadUInt32); break;
case 3: Name = AOptimizations.DisableMemoryChecks
? nameof(AMemory.ReadUInt64Unchecked)
: nameof(AMemory.ReadUInt64); break;
case 0: Name = nameof(AMemory.ReadByte); break;
case 1: Name = nameof(AMemory.ReadUInt16); break;
case 2: Name = nameof(AMemory.ReadUInt32); break;
case 3: Name = nameof(AMemory.ReadUInt64); break;
}
}
@ -132,46 +107,21 @@ namespace ChocolArm64.Instruction
{
switch (Size)
{
case 0: Name = AOptimizations.DisableMemoryChecks
? nameof(AMemory.WriteVector8Unchecked)
: nameof(AMemory.WriteVector8); break;
case 1: Name = AOptimizations.DisableMemoryChecks
? nameof(AMemory.WriteVector16Unchecked)
: nameof(AMemory.WriteVector16); break;
case 2: Name = AOptimizations.DisableMemoryChecks
? nameof(AMemory.WriteVector32Unchecked)
: nameof(AMemory.WriteVector32); break;
case 3: Name = AOptimizations.DisableMemoryChecks
? nameof(AMemory.WriteVector64Unchecked)
: nameof(AMemory.WriteVector64); break;
case 4: Name = AOptimizations.DisableMemoryChecks
? nameof(AMemory.WriteVector128Unchecked)
: nameof(AMemory.WriteVector128); break;
case 0: Name = nameof(AMemory.WriteVector8); break;
case 1: Name = nameof(AMemory.WriteVector16); break;
case 2: Name = nameof(AMemory.WriteVector32); break;
case 3: Name = nameof(AMemory.WriteVector64); break;
case 4: Name = nameof(AMemory.WriteVector128); break;
}
}
else
{
switch (Size)
{
case 0: Name = AOptimizations.DisableMemoryChecks
? nameof(AMemory.WriteByteUnchecked)
: nameof(AMemory.WriteByte); break;
case 1: Name = AOptimizations.DisableMemoryChecks
? nameof(AMemory.WriteUInt16Unchecked)
: nameof(AMemory.WriteUInt16); break;
case 2: Name = AOptimizations.DisableMemoryChecks
? nameof(AMemory.WriteUInt32Unchecked)
: nameof(AMemory.WriteUInt32); break;
case 3: Name = AOptimizations.DisableMemoryChecks
? nameof(AMemory.WriteUInt64Unchecked)
: nameof(AMemory.WriteUInt64); break;
case 0: Name = nameof(AMemory.WriteByte); break;
case 1: Name = nameof(AMemory.WriteUInt16); break;
case 2: Name = nameof(AMemory.WriteUInt32); break;
case 3: Name = nameof(AMemory.WriteUInt64); break;
}
}

698
Memory/AMemory.cs
View file

@ -1,6 +1,7 @@
using ChocolArm64.Exceptions;
using ChocolArm64.State;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
@ -12,9 +13,22 @@ namespace ChocolArm64.Memory
{
public unsafe class AMemory : IAMemory, IDisposable
{
private const long ErgMask = (4 << AThreadState.ErgSizeLog2) - 1;
private const int PTLvl0Bits = 13;
private const int PTLvl1Bits = 14;
private const int PTPageBits = 12;
public AMemoryMgr Manager { get; private set; }
private const int PTLvl0Size = 1 << PTLvl0Bits;
private const int PTLvl1Size = 1 << PTLvl1Bits;
public const int PageSize = 1 << PTPageBits;
private const int PTLvl0Mask = PTLvl0Size - 1;
private const int PTLvl1Mask = PTLvl1Size - 1;
public const int PageMask = PageSize - 1;
private const int PTLvl0Bit = PTPageBits + PTLvl1Bits;
private const int PTLvl1Bit = PTPageBits;
private const long ErgMask = (4 << AThreadState.ErgSizeLog2) - 1;
private class ArmMonitor
{
@ -29,32 +43,30 @@ namespace ChocolArm64.Memory
private Dictionary<int, ArmMonitor> Monitors;
private ConcurrentDictionary<long, IntPtr> ObservedPages;
public IntPtr Ram { get; private set; }
private byte* RamPtr;
private int HostPageSize;
private byte*** PageTable;
public AMemory()
public AMemory(IntPtr Ram)
{
Manager = new AMemoryMgr();
Monitors = new Dictionary<int, ArmMonitor>();
IntPtr Size = (IntPtr)AMemoryMgr.RamSize + AMemoryMgr.PageSize;
ObservedPages = new ConcurrentDictionary<long, IntPtr>();
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
Ram = AMemoryWin32.Allocate(Size);
HostPageSize = AMemoryWin32.GetPageSize(Ram, Size);
}
else
{
Ram = Marshal.AllocHGlobal(Size);
}
this.Ram = Ram;
RamPtr = (byte*)Ram;
PageTable = (byte***)Marshal.AllocHGlobal(PTLvl0Size * IntPtr.Size);
for (int L0 = 0; L0 < PTLvl0Size; L0++)
{
PageTable[L0] = null;
}
}
public void RemoveMonitor(AThreadState State)
@ -155,62 +167,6 @@ namespace ChocolArm64.Memory
}
}
public int GetHostPageSize()
{
return HostPageSize;
}
public (bool[], long) IsRegionModified(long Position, long Size)
{
if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
return (null, 0);
}
long EndPos = Position + Size;
if ((ulong)EndPos < (ulong)Position)
{
return (null, 0);
}
if ((ulong)EndPos > AMemoryMgr.RamSize)
{
return (null, 0);
}
IntPtr MemAddress = new IntPtr(RamPtr + Position);
IntPtr MemSize = new IntPtr(Size);
int HostPageMask = HostPageSize - 1;
Position &= ~HostPageMask;
Size = EndPos - Position;
IntPtr[] Addresses = new IntPtr[(Size + HostPageMask) / HostPageSize];
AMemoryWin32.IsRegionModified(MemAddress, MemSize, Addresses, out int Count);
bool[] Modified = new bool[Addresses.Length];
for (int Index = 0; Index < Count; Index++)
{
long VA = Addresses[Index].ToInt64() - Ram.ToInt64();
Modified[(VA - Position) / HostPageSize] = true;
}
return (Modified, Count);
}
public IntPtr GetHostAddress(long Position, long Size)
{
EnsureRangeIsValid(Position, Size, AMemoryPerm.Read);
return (IntPtr)(RamPtr + (ulong)Position);
}
public sbyte ReadSByte(long Position)
{
return (sbyte)ReadByte(Position);
@ -233,33 +189,22 @@ namespace ChocolArm64.Memory
public byte ReadByte(long Position)
{
EnsureAccessIsValid(Position, AMemoryPerm.Read);
return ReadByteUnchecked(Position);
return *((byte*)Translate(Position));
}
public ushort ReadUInt16(long Position)
{
EnsureAccessIsValid(Position + 0, AMemoryPerm.Read);
EnsureAccessIsValid(Position + 1, AMemoryPerm.Read);
return ReadUInt16Unchecked(Position);
return *((ushort*)Translate(Position));
}
public uint ReadUInt32(long Position)
{
EnsureAccessIsValid(Position + 0, AMemoryPerm.Read);
EnsureAccessIsValid(Position + 3, AMemoryPerm.Read);
return ReadUInt32Unchecked(Position);
return *((uint*)Translate(Position));
}
public ulong ReadUInt64(long Position)
{
EnsureAccessIsValid(Position + 0, AMemoryPerm.Read);
EnsureAccessIsValid(Position + 7, AMemoryPerm.Read);
return ReadUInt64Unchecked(Position);
return *((ulong*)Translate(Position));
}
public Vector128<float> ReadVector8(long Position)
@ -274,6 +219,7 @@ namespace ChocolArm64.Memory
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public Vector128<float> ReadVector16(long Position)
{
if (Sse2.IsSupported)
@ -286,14 +232,12 @@ namespace ChocolArm64.Memory
}
}
[MethodImpl(MethodImplOptions.NoInlining)]
public Vector128<float> ReadVector32(long Position)
{
EnsureAccessIsValid(Position + 0, AMemoryPerm.Read);
EnsureAccessIsValid(Position + 3, AMemoryPerm.Read);
if (Sse.IsSupported)
{
return Sse.LoadScalarVector128((float*)(RamPtr + (uint)Position));
return Sse.LoadScalarVector128((float*)Translate(Position));
}
else
{
@ -301,14 +245,12 @@ namespace ChocolArm64.Memory
}
}
[MethodImpl(MethodImplOptions.NoInlining)]
public Vector128<float> ReadVector64(long Position)
{
EnsureAccessIsValid(Position + 0, AMemoryPerm.Read);
EnsureAccessIsValid(Position + 7, AMemoryPerm.Read);
if (Sse2.IsSupported)
{
return Sse.StaticCast<double, float>(Sse2.LoadScalarVector128((double*)(RamPtr + (uint)Position)));
return Sse.StaticCast<double, float>(Sse2.LoadScalarVector128((double*)Translate(Position)));
}
else
{
@ -316,118 +258,12 @@ namespace ChocolArm64.Memory
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public Vector128<float> ReadVector128(long Position)
{
EnsureAccessIsValid(Position + 0, AMemoryPerm.Read);
EnsureAccessIsValid(Position + 15, AMemoryPerm.Read);
if (Sse.IsSupported)
{
return Sse.LoadVector128((float*)(RamPtr + (uint)Position));
}
else
{
throw new PlatformNotSupportedException();
}
}
public sbyte ReadSByteUnchecked(long Position)
{
return (sbyte)ReadByteUnchecked(Position);
}
public short ReadInt16Unchecked(long Position)
{
return (short)ReadUInt16Unchecked(Position);
}
public int ReadInt32Unchecked(long Position)
{
return (int)ReadUInt32Unchecked(Position);
}
public long ReadInt64Unchecked(long Position)
{
return (long)ReadUInt64Unchecked(Position);
}
public byte ReadByteUnchecked(long Position)
{
return *((byte*)(RamPtr + (uint)Position));
}
public ushort ReadUInt16Unchecked(long Position)
{
return *((ushort*)(RamPtr + (uint)Position));
}
public uint ReadUInt32Unchecked(long Position)
{
return *((uint*)(RamPtr + (uint)Position));
}
public ulong ReadUInt64Unchecked(long Position)
{
return *((ulong*)(RamPtr + (uint)Position));
}
public Vector128<float> ReadVector8Unchecked(long Position)
{
if (Sse2.IsSupported)
{
return Sse.StaticCast<byte, float>(Sse2.SetVector128(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ReadByte(Position)));
}
else
{
throw new PlatformNotSupportedException();
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public Vector128<float> ReadVector16Unchecked(long Position)
{
if (Sse2.IsSupported)
{
return Sse.StaticCast<ushort, float>(Sse2.Insert(Sse2.SetZeroVector128<ushort>(), ReadUInt16Unchecked(Position), 0));
}
else
{
throw new PlatformNotSupportedException();
}
}
[MethodImpl(MethodImplOptions.NoInlining)]
public Vector128<float> ReadVector32Unchecked(long Position)
{
if (Sse.IsSupported)
{
return Sse.LoadScalarVector128((float*)(RamPtr + (uint)Position));
}
else
{
throw new PlatformNotSupportedException();
}
}
[MethodImpl(MethodImplOptions.NoInlining)]
public Vector128<float> ReadVector64Unchecked(long Position)
{
if (Sse2.IsSupported)
{
return Sse.StaticCast<double, float>(Sse2.LoadScalarVector128((double*)(RamPtr + (uint)Position)));
}
else
{
throw new PlatformNotSupportedException();
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public Vector128<float> ReadVector128Unchecked(long Position)
{
if (Sse.IsSupported)
{
return Sse.LoadVector128((float*)(RamPtr + (uint)Position));
return Sse.LoadVector128((float*)Translate(Position));
}
else
{
@ -442,11 +278,11 @@ namespace ChocolArm64.Memory
throw new ArgumentOutOfRangeException(nameof(Size));
}
EnsureRangeIsValid(Position, Size, AMemoryPerm.Read);
EnsureRangeIsValid(Position, Size);
byte[] Data = new byte[Size];
Marshal.Copy((IntPtr)(RamPtr + (uint)Position), Data, 0, (int)Size);
Marshal.Copy((IntPtr)Translate(Position), Data, 0, (int)Size);
return Data;
}
@ -473,35 +309,25 @@ namespace ChocolArm64.Memory
public void WriteByte(long Position, byte Value)
{
EnsureAccessIsValid(Position, AMemoryPerm.Write);
WriteByteUnchecked(Position, Value);
*((byte*)TranslateWrite(Position)) = Value;
}
public void WriteUInt16(long Position, ushort Value)
{
EnsureAccessIsValid(Position + 0, AMemoryPerm.Write);
EnsureAccessIsValid(Position + 1, AMemoryPerm.Write);
WriteUInt16Unchecked(Position, Value);
*((ushort*)TranslateWrite(Position)) = Value;
}
public void WriteUInt32(long Position, uint Value)
{
EnsureAccessIsValid(Position + 0, AMemoryPerm.Write);
EnsureAccessIsValid(Position + 3, AMemoryPerm.Write);
WriteUInt32Unchecked(Position, Value);
*((uint*)TranslateWrite(Position)) = Value;
}
public void WriteUInt64(long Position, ulong Value)
{
EnsureAccessIsValid(Position + 0, AMemoryPerm.Write);
EnsureAccessIsValid(Position + 7, AMemoryPerm.Write);
WriteUInt64Unchecked(Position, Value);
*((ulong*)TranslateWrite(Position)) = Value;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void WriteVector8(long Position, Vector128<float> Value)
{
if (Sse41.IsSupported)
@ -518,6 +344,7 @@ namespace ChocolArm64.Memory
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void WriteVector16(long Position, Vector128<float> Value)
{
if (Sse2.IsSupported)
@ -530,14 +357,12 @@ namespace ChocolArm64.Memory
}
}
[MethodImpl(MethodImplOptions.NoInlining)]
public void WriteVector32(long Position, Vector128<float> Value)
{
EnsureAccessIsValid(Position + 0, AMemoryPerm.Write);
EnsureAccessIsValid(Position + 3, AMemoryPerm.Write);
if (Sse.IsSupported)
{
Sse.StoreScalar((float*)(RamPtr + (uint)Position), Value);
Sse.StoreScalar((float*)TranslateWrite(Position), Value);
}
else
{
@ -545,14 +370,12 @@ namespace ChocolArm64.Memory
}
}
[MethodImpl(MethodImplOptions.NoInlining)]
public void WriteVector64(long Position, Vector128<float> Value)
{
EnsureAccessIsValid(Position + 0, AMemoryPerm.Write);
EnsureAccessIsValid(Position + 7, AMemoryPerm.Write);
if (Sse2.IsSupported)
{
Sse2.StoreScalar((double*)(RamPtr + (uint)Position), Sse.StaticCast<float, double>(Value));
Sse2.StoreScalar((double*)TranslateWrite(Position), Sse.StaticCast<float, double>(Value));
}
else
{
@ -560,123 +383,12 @@ namespace ChocolArm64.Memory
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void WriteVector128(long Position, Vector128<float> Value)
{
EnsureAccessIsValid(Position + 0, AMemoryPerm.Write);
EnsureAccessIsValid(Position + 15, AMemoryPerm.Write);
if (Sse.IsSupported)
{
Sse.Store((float*)(RamPtr + (uint)Position), Value);
}
else
{
throw new PlatformNotSupportedException();
}
}
public void WriteSByteUnchecked(long Position, sbyte Value)
{
WriteByteUnchecked(Position, (byte)Value);
}
public void WriteInt16Unchecked(long Position, short Value)
{
WriteUInt16Unchecked(Position, (ushort)Value);
}
public void WriteInt32Unchecked(long Position, int Value)
{
WriteUInt32Unchecked(Position, (uint)Value);
}
public void WriteInt64Unchecked(long Position, long Value)
{
WriteUInt64Unchecked(Position, (ulong)Value);
}
public void WriteByteUnchecked(long Position, byte Value)
{
*((byte*)(RamPtr + (uint)Position)) = Value;
}
public void WriteUInt16Unchecked(long Position, ushort Value)
{
*((ushort*)(RamPtr + (uint)Position)) = Value;
}
public void WriteUInt32Unchecked(long Position, uint Value)
{
*((uint*)(RamPtr + (uint)Position)) = Value;
}
public void WriteUInt64Unchecked(long Position, ulong Value)
{
*((ulong*)(RamPtr + (uint)Position)) = Value;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void WriteVector8Unchecked(long Position, Vector128<float> Value)
{
if (Sse41.IsSupported)
{
WriteByteUnchecked(Position, Sse41.Extract(Sse.StaticCast<float, byte>(Value), 0));
}
else if (Sse2.IsSupported)
{
WriteByteUnchecked(Position, (byte)Sse2.Extract(Sse.StaticCast<float, ushort>(Value), 0));
}
else
{
throw new PlatformNotSupportedException();
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void WriteVector16Unchecked(long Position, Vector128<float> Value)
{
if (Sse2.IsSupported)
{
WriteUInt16Unchecked(Position, Sse2.Extract(Sse.StaticCast<float, ushort>(Value), 0));
}
else
{
throw new PlatformNotSupportedException();
}
}
[MethodImpl(MethodImplOptions.NoInlining)]
public void WriteVector32Unchecked(long Position, Vector128<float> Value)
{
if (Sse.IsSupported)
{
Sse.StoreScalar((float*)(RamPtr + (uint)Position), Value);
}
else
{
throw new PlatformNotSupportedException();
}
}
[MethodImpl(MethodImplOptions.NoInlining)]
public void WriteVector64Unchecked(long Position, Vector128<float> Value)
{
if (Sse2.IsSupported)
{
Sse2.StoreScalar((double*)(RamPtr + (uint)Position), Sse.StaticCast<float, double>(Value));
}
else
{
throw new PlatformNotSupportedException();
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void WriteVector128Unchecked(long Position, Vector128<float> Value)
{
if (Sse.IsSupported)
{
Sse.Store((float*)(RamPtr + (uint)Position), Value);
Sse.Store((float*)TranslateWrite(Position), Value);
}
else
{
@ -686,36 +398,285 @@ namespace ChocolArm64.Memory
public void WriteBytes(long Position, byte[] Data)
{
EnsureRangeIsValid(Position, (uint)Data.Length, AMemoryPerm.Write);
EnsureRangeIsValid(Position, (uint)Data.Length);
Marshal.Copy(Data, 0, (IntPtr)(RamPtr + (uint)Position), Data.Length);
Marshal.Copy(Data, 0, (IntPtr)TranslateWrite(Position), Data.Length);
}
private void EnsureRangeIsValid(long Position, long Size, AMemoryPerm Perm)
public void Map(long VA, long PA, long Size)
{
SetPTEntries(VA, RamPtr + PA, Size);
}
public void Unmap(long Position, long Size)
{
SetPTEntries(Position, null, Size);
StopObservingRegion(Position, Size);
}
public bool IsMapped(long Position)
{
if (!(IsValidPosition(Position)))
{
return false;
}
long L0 = (Position >> PTLvl0Bit) & PTLvl0Mask;
long L1 = (Position >> PTLvl1Bit) & PTLvl1Mask;
if (PageTable[L0] == null)
{
return false;
}
return PageTable[L0][L1] != null || ObservedPages.ContainsKey(Position >> PTPageBits);
}
public long GetPhysicalAddress(long VirtualAddress)
{
byte* Ptr = Translate(VirtualAddress);
return (long)(Ptr - RamPtr);
}
internal byte* Translate(long Position)
{
long L0 = (Position >> PTLvl0Bit) & PTLvl0Mask;
long L1 = (Position >> PTLvl1Bit) & PTLvl1Mask;
long Old = Position;
byte** Lvl1 = PageTable[L0];
if ((Position >> (PTLvl0Bit + PTLvl0Bits)) != 0)
{
goto Unmapped;
}
if (Lvl1 == null)
{
goto Unmapped;
}
Position &= PageMask;
byte* Ptr = Lvl1[L1];
if (Ptr == null)
{
goto Unmapped;
}
return Ptr + Position;
Unmapped:
return HandleNullPte(Old);
}
private byte* HandleNullPte(long Position)
{
long Key = Position >> PTPageBits;
if (ObservedPages.TryGetValue(Key, out IntPtr Ptr))
{
return (byte*)Ptr + (Position & PageMask);
}
throw new VmmPageFaultException(Position);
}
internal byte* TranslateWrite(long Position)
{
long L0 = (Position >> PTLvl0Bit) & PTLvl0Mask;
long L1 = (Position >> PTLvl1Bit) & PTLvl1Mask;
long Old = Position;
byte** Lvl1 = PageTable[L0];
if ((Position >> (PTLvl0Bit + PTLvl0Bits)) != 0)
{
goto Unmapped;
}
if (Lvl1 == null)
{
goto Unmapped;
}
Position &= PageMask;
byte* Ptr = Lvl1[L1];
if (Ptr == null)
{
goto Unmapped;
}
return Ptr + Position;
Unmapped:
return HandleNullPteWrite(Old);
}
private byte* HandleNullPteWrite(long Position)
{
long Key = Position >> PTPageBits;
if (ObservedPages.TryGetValue(Key, out IntPtr Ptr))
{
SetPTEntry(Position, (byte*)Ptr);
return (byte*)Ptr + (Position & PageMask);
}
throw new VmmPageFaultException(Position);
}
private void SetPTEntries(long VA, byte* Ptr, long Size)
{
long EndPosition = (VA + Size + PageMask) & ~PageMask;
while ((ulong)VA < (ulong)EndPosition)
{
SetPTEntry(VA, Ptr);
VA += PageSize;
if (Ptr != null)
{
Ptr += PageSize;
}
}
}
private void SetPTEntry(long Position, byte* Ptr)
{
if (!IsValidPosition(Position))
{
throw new ArgumentOutOfRangeException(nameof(Position));
}
long L0 = (Position >> PTLvl0Bit) & PTLvl0Mask;
long L1 = (Position >> PTLvl1Bit) & PTLvl1Mask;
if (PageTable[L0] == null)
{
byte** Lvl1 = (byte**)Marshal.AllocHGlobal(PTLvl1Size * IntPtr.Size);
for (int ZL1 = 0; ZL1 < PTLvl1Size; ZL1++)
{
Lvl1[ZL1] = null;
}
Thread.MemoryBarrier();
PageTable[L0] = Lvl1;
}
PageTable[L0][L1] = Ptr;
}
public (bool[], int) IsRegionModified(long Position, long Size)
{
long EndPosition = (Position + Size + PageMask) & ~PageMask;
Position &= ~PageMask;
Size = EndPosition - Position;
bool[] Modified = new bool[Size >> PTPageBits];
int Count = 0;
lock (ObservedPages)
{
for (int Page = 0; Page < Modified.Length; Page++)
{
byte* Ptr = Translate(Position);
if (ObservedPages.TryAdd(Position >> PTPageBits, (IntPtr)Ptr))
{
Modified[Page] = true;
Count++;
}
else
{
long L0 = (Position >> PTLvl0Bit) & PTLvl0Mask;
long L1 = (Position >> PTLvl1Bit) & PTLvl1Mask;
byte** Lvl1 = PageTable[L0];
if (Lvl1 != null)
{
if (Modified[Page] = Lvl1[L1] != null)
{
Count++;
}
}
}
SetPTEntry(Position, null);
Position += PageSize;
}
}
return (Modified, Count);
}
public void StopObservingRegion(long Position, long Size)
{
long EndPosition = (Position + Size + PageMask) & ~PageMask;
while (Position < EndPosition)
{
lock (ObservedPages)
{
if (ObservedPages.TryRemove(Position >> PTPageBits, out IntPtr Ptr))
{
SetPTEntry(Position, (byte*)Ptr);
}
}
Position += PageSize;
}
}
public IntPtr GetHostAddress(long Position, long Size)
{
EnsureRangeIsValid(Position, Size);
return (IntPtr)Translate(Position);
}
internal void EnsureRangeIsValid(long Position, long Size)
{
long EndPos = Position + Size;
Position &= ~AMemoryMgr.PageMask;
Position &= ~PageMask;
long ExpectedPA = GetPhysicalAddress(Position);
while ((ulong)Position < (ulong)EndPos)
{
EnsureAccessIsValid(Position, Perm);
long PA = GetPhysicalAddress(Position);
Position += AMemoryMgr.PageSize;
if (PA != ExpectedPA)
{
throw new VmmAccessException(Position, Size);
}
Position += PageSize;
ExpectedPA += PageSize;
}
}
private void EnsureAccessIsValid(long Position, AMemoryPerm Perm)
public bool IsValidPosition(long Position)
{
if (!Manager.IsMapped(Position))
{
throw new VmmPageFaultException(Position);
}
if (!Manager.HasPermission(Position, Perm))
{
throw new VmmAccessViolationException(Position, Perm);
}
return Position >> (PTLvl0Bits + PTLvl1Bits + PTPageBits) == 0;
}
public void Dispose()
@ -725,19 +686,24 @@ namespace ChocolArm64.Memory
protected virtual void Dispose(bool disposing)
{
if (Ram != IntPtr.Zero)
if (PageTable == null)
{
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
return;
}
for (int L0 = 0; L0 < PTLvl0Size; L0++)
{
if (PageTable[L0] != null)
{
AMemoryWin32.Free(Ram);
}
else
{
Marshal.FreeHGlobal(Ram);
Marshal.FreeHGlobal((IntPtr)PageTable[L0]);
}
Ram = IntPtr.Zero;
PageTable[L0] = null;
}
Marshal.FreeHGlobal((IntPtr)PageTable);
PageTable = null;
}
}
}

24
Memory/AMemoryHelper.cs
View file

@ -26,12 +26,9 @@ namespace ChocolArm64.Memory
{
long Size = Marshal.SizeOf<T>();
if ((ulong)(Position + Size) > AMemoryMgr.AddrSize)
{
throw new ArgumentOutOfRangeException(nameof(Position));
}
Memory.EnsureRangeIsValid(Position, Size);
IntPtr Ptr = new IntPtr((byte*)Memory.Ram + Position);
IntPtr Ptr = (IntPtr)Memory.Translate(Position);
return Marshal.PtrToStructure<T>(Ptr);
}
@ -40,12 +37,9 @@ namespace ChocolArm64.Memory
{
long Size = Marshal.SizeOf<T>();
if ((ulong)(Position + Size) > AMemoryMgr.AddrSize)
{
throw new ArgumentOutOfRangeException(nameof(Position));
}
Memory.EnsureRangeIsValid(Position, Size);
IntPtr Ptr = new IntPtr((byte*)Memory.Ram + Position);
IntPtr Ptr = (IntPtr)Memory.TranslateWrite(Position);
Marshal.StructureToPtr<T>(Value, Ptr, false);
}
@ -69,15 +63,5 @@ namespace ChocolArm64.Memory
return Encoding.ASCII.GetString(MS.ToArray());
}
}
public static long PageRoundUp(long Value)
{
return (Value + AMemoryMgr.PageMask) & ~AMemoryMgr.PageMask;
}
public static long PageRoundDown(long Value)
{
return Value & ~AMemoryMgr.PageMask;
}
}
}

21
Memory/AMemoryMapInfo.cs
View file

@ -1,21 +0,0 @@
namespace ChocolArm64.Memory
{
public class AMemoryMapInfo
{
public long Position { get; private set; }
public long Size { get; private set; }
public int Type { get; private set; }
public int Attr { get; private set; }
public AMemoryPerm Perm { get; private set; }
public AMemoryMapInfo(long Position, long Size, int Type, int Attr, AMemoryPerm Perm)
{
this.Position = Position;
this.Size = Size;
this.Type = Type;
this.Attr = Attr;
this.Perm = Perm;
}
}
}

258
Memory/AMemoryMgr.cs
View file

@ -1,258 +0,0 @@
using System;
namespace ChocolArm64.Memory
{
public class AMemoryMgr
{
public const long RamSize = 4L * 1024 * 1024 * 1024;
public const long AddrSize = RamSize;
private const int PTLvl0Bits = 10;
private const int PTLvl1Bits = 10;
private const int PTPageBits = 12;
private const int PTLvl0Size = 1 << PTLvl0Bits;
private const int PTLvl1Size = 1 << PTLvl1Bits;
public const int PageSize = 1 << PTPageBits;
private const int PTLvl0Mask = PTLvl0Size - 1;
private const int PTLvl1Mask = PTLvl1Size - 1;
public const int PageMask = PageSize - 1;
private const int PTLvl0Bit = PTPageBits + PTLvl1Bits;
private const int PTLvl1Bit = PTPageBits;
private enum PTMap
{
Unmapped,
Mapped
}
private struct PTEntry
{
public PTMap Map;
public AMemoryPerm Perm;
public int Type;
public int Attr;
public PTEntry(PTMap Map, AMemoryPerm Perm, int Type, int Attr)
{
this.Map = Map;
this.Perm = Perm;
this.Type = Type;
this.Attr = Attr;
}
}
private PTEntry[][] PageTable;
public AMemoryMgr()
{
PageTable = new PTEntry[PTLvl0Size][];
}
public void Map(long Position, long Size, int Type, AMemoryPerm Perm)
{
SetPTEntry(Position, Size, new PTEntry(PTMap.Mapped, Perm, Type, 0));
}
public void Unmap(long Position, long Size)
{
SetPTEntry(Position, Size, new PTEntry(PTMap.Unmapped, 0, 0, 0));
}
public void Unmap(long Position, long Size, int Type)
{
SetPTEntry(Position, Size, Type, new PTEntry(PTMap.Unmapped, 0, 0, 0));
}
public void Reprotect(long Position, long Size, AMemoryPerm Perm)
{
Position = AMemoryHelper.PageRoundDown(Position);
Size = AMemoryHelper.PageRoundUp(Size);
long PagesCount = Size / PageSize;
while (PagesCount-- > 0)
{
PTEntry Entry = GetPTEntry(Position);
Entry.Perm = Perm;
SetPTEntry(Position, Entry);
Position += PageSize;
}
}
public AMemoryMapInfo GetMapInfo(long Position)
{
if (!IsValidPosition(Position))
{
return null;
}
Position = AMemoryHelper.PageRoundDown(Position);
PTEntry BaseEntry = GetPTEntry(Position);
bool IsSameSegment(long Pos)
{
if (!IsValidPosition(Pos))
{
return false;
}
PTEntry Entry = GetPTEntry(Pos);
return Entry.Map == BaseEntry.Map &&
Entry.Perm == BaseEntry.Perm &&
Entry.Type == BaseEntry.Type &&
Entry.Attr == BaseEntry.Attr;
}
long Start = Position;
long End = Position + PageSize;
while (Start > 0 && IsSameSegment(Start - PageSize))
{
Start -= PageSize;
}
while (End < AddrSize && IsSameSegment(End))
{
End += PageSize;
}
long Size = End - Start;
return new AMemoryMapInfo(
Start,
Size,
BaseEntry.Type,
BaseEntry.Attr,
BaseEntry.Perm);
}
public void ClearAttrBit(long Position, long Size, int Bit)
{
while (Size > 0)
{
PTEntry Entry = GetPTEntry(Position);
Entry.Attr &= ~(1 << Bit);
SetPTEntry(Position, Entry);
Position += PageSize;
Size -= PageSize;
}
}
public void SetAttrBit(long Position, long Size, int Bit)
{
while (Size > 0)
{
PTEntry Entry = GetPTEntry(Position);
Entry.Attr |= (1 << Bit);
SetPTEntry(Position, Entry);
Position += PageSize;
Size -= PageSize;
}
}
public bool HasPermission(long Position, AMemoryPerm Perm)
{
return GetPTEntry(Position).Perm.HasFlag(Perm);
}
public bool IsValidPosition(long Position)
{
if (Position >> PTLvl0Bits + PTLvl1Bits + PTPageBits != 0)
{
return false;
}
return true;
}
public bool IsMapped(long Position)
{
if (Position >> PTLvl0Bits + PTLvl1Bits + PTPageBits != 0)
{
return false;
}
long L0 = (Position >> PTLvl0Bit) & PTLvl0Mask;
long L1 = (Position >> PTLvl1Bit) & PTLvl1Mask;
if (PageTable[L0] == null)
{
return false;
}
return PageTable[L0][L1].Map != PTMap.Unmapped;
}
private PTEntry GetPTEntry(long Position)
{
long L0 = (Position >> PTLvl0Bit) & PTLvl0Mask;
long L1 = (Position >> PTLvl1Bit) & PTLvl1Mask;
if (PageTable[L0] == null)
{
return default(PTEntry);
}
return PageTable[L0][L1];
}
private void SetPTEntry(long Position, long Size, PTEntry Entry)
{
while (Size > 0)
{
SetPTEntry(Position, Entry);
Position += PageSize;
Size -= PageSize;
}
}
private void SetPTEntry(long Position, long Size, int Type, PTEntry Entry)
{
while (Size > 0)
{
if (GetPTEntry(Position).Type == Type)
{
SetPTEntry(Position, Entry);
}
Position += PageSize;
Size -= PageSize;
}
}
private void SetPTEntry(long Position, PTEntry Entry)
{
if (!IsValidPosition(Position))
{
throw new ArgumentOutOfRangeException(nameof(Position));
}
long L0 = (Position >> PTLvl0Bit) & PTLvl0Mask;
long L1 = (Position >> PTLvl1Bit) & PTLvl1Mask;
if (PageTable[L0] == null)
{
PageTable[L0] = new PTEntry[PTLvl1Size];
}
PageTable[L0][L1] = Entry;
}
}
}

15
Memory/AMemoryPerm.cs
View file

@ -1,15 +0,0 @@
using System;
namespace ChocolArm64.Memory
{
[Flags]
public enum AMemoryPerm
{
None = 0,
Read = 1 << 0,
Write = 1 << 1,
Execute = 1 << 2,
RW = Read | Write,
RX = Read | Execute
}
}

92
Memory/AMemoryWin32.cs
View file

@ -1,92 +0,0 @@
using System;
using System.Runtime.InteropServices;
namespace ChocolArm64.Memory
{
static class AMemoryWin32
{
private const int MEM_COMMIT = 0x00001000;
private const int MEM_RESERVE = 0x00002000;
private const int MEM_WRITE_WATCH = 0x00200000;
private const int PAGE_READWRITE = 0x04;
private const int MEM_RELEASE = 0x8000;
private const int WRITE_WATCH_FLAG_RESET = 1;
[DllImport("kernel32.dll")]
private static extern IntPtr VirtualAlloc(IntPtr lpAddress, IntPtr dwSize, int flAllocationType, int flProtect);
[DllImport("kernel32.dll")]
private static extern bool VirtualFree(IntPtr lpAddress, IntPtr dwSize, int dwFreeType);
[DllImport("kernel32.dll")]
private unsafe static extern int GetWriteWatch(
int dwFlags,
IntPtr lpBaseAddress,
IntPtr dwRegionSize,
IntPtr[] lpAddresses,
long* lpdwCount,
long* lpdwGranularity);
public static IntPtr Allocate(IntPtr Size)
{
const int Flags = MEM_COMMIT | MEM_RESERVE | MEM_WRITE_WATCH;
IntPtr Address = VirtualAlloc(IntPtr.Zero, Size, Flags, PAGE_READWRITE);
if (Address == IntPtr.Zero)
{
throw new InvalidOperationException();
}
return Address;
}
public static void Free(IntPtr Address)
{
VirtualFree(Address, IntPtr.Zero, MEM_RELEASE);
}
public unsafe static int GetPageSize(IntPtr Address, IntPtr Size)
{
IntPtr[] Addresses = new IntPtr[1];
long Count = Addresses.Length;
long Granularity;
GetWriteWatch(
0,
Address,
Size,
Addresses,
&Count,
&Granularity);
return (int)Granularity;
}
public unsafe static void IsRegionModified(
IntPtr Address,
IntPtr Size,
IntPtr[] Addresses,
out int AddrCount)
{
long Count = Addresses.Length;
long Granularity;
GetWriteWatch(
WRITE_WATCH_FLAG_RESET,
Address,
Size,
Addresses,
&Count,
&Granularity);
AddrCount = (int)Count;
}
}
}