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jinx/ChocolArm64/Memory/AMemory.cs

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20 KiB
C#

using ChocolArm64.Exceptions;
using ChocolArm64.State;
using System;
using System.Collections.Generic;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Runtime.Intrinsics;
using System.Runtime.Intrinsics.X86;
namespace ChocolArm64.Memory
{
public unsafe class AMemory : IAMemory, IDisposable
{
private const long ErgMask = (4 << AThreadState.ErgSizeLog2) - 1;
public AMemoryMgr Manager { get; private set; }
private struct ExMonitor
{
public long Position { get; private set; }
private bool ExState;
public ExMonitor(long Position, bool ExState)
{
this.Position = Position;
this.ExState = ExState;
}
public bool HasExclusiveAccess(long Position)
{
return this.Position == Position && ExState;
}
public void Reset()
{
ExState = false;
}
}
private Dictionary<int, ExMonitor> Monitors;
private HashSet<long> ExAddrs;
public IntPtr Ram { get; private set; }
private byte* RamPtr;
public AMemory()
{
Manager = new AMemoryMgr();
Monitors = new Dictionary<int, ExMonitor>();
ExAddrs = new HashSet<long>();
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
Ram = AMemoryWin32.Allocate((IntPtr)AMemoryMgr.RamSize + AMemoryMgr.PageSize);
}
else
{
Ram = Marshal.AllocHGlobal((IntPtr)AMemoryMgr.RamSize + AMemoryMgr.PageSize);
}
RamPtr = (byte*)Ram;
}
public void RemoveMonitor(int ThreadId)
{
lock (Monitors)
{
if (Monitors.TryGetValue(ThreadId, out ExMonitor Monitor))
{
ExAddrs.Remove(Monitor.Position);
}
Monitors.Remove(ThreadId);
}
}
public void SetExclusive(AThreadState ThreadState, long Position)
{
Position &= ~ErgMask;
lock (Monitors)
{
if (Monitors.TryGetValue(ThreadState.ThreadId, out ExMonitor Monitor))
{
ExAddrs.Remove(Monitor.Position);
}
bool ExState = ExAddrs.Add(Position);
Monitor = new ExMonitor(Position, ExState);
if (!Monitors.TryAdd(ThreadState.ThreadId, Monitor))
{
Monitors[ThreadState.ThreadId] = Monitor;
}
}
}
public bool TestExclusive(AThreadState ThreadState, long Position)
{
Position &= ~ErgMask;
lock (Monitors)
{
if (!Monitors.TryGetValue(ThreadState.ThreadId, out ExMonitor Monitor))
{
return false;
}
return Monitor.HasExclusiveAccess(Position);
}
}
public void ClearExclusive(AThreadState ThreadState)
{
lock (Monitors)
{
if (Monitors.TryGetValue(ThreadState.ThreadId, out ExMonitor Monitor))
{
Monitor.Reset();
ExAddrs.Remove(Monitor.Position);
}
}
}
public bool AcquireAddress(long Position)
{
Position &= ~ErgMask;
lock (Monitors)
{
return ExAddrs.Add(Position);
}
}
public void ReleaseAddress(long Position)
{
Position &= ~ErgMask;
lock (Monitors)
{
ExAddrs.Remove(Position);
}
}
public long GetHostPageSize()
{
if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
return AMemoryMgr.PageSize;
}
IntPtr MemAddress = new IntPtr(RamPtr);
IntPtr MemSize = new IntPtr(AMemoryMgr.RamSize);
long PageSize = AMemoryWin32.IsRegionModified(MemAddress, MemSize, Reset: false);
if (PageSize < 1)
{
throw new InvalidOperationException();
}
return PageSize;
}
public bool IsRegionModified(long Position, long Size)
{
if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
return true;
}
long EndPos = Position + Size;
if ((ulong)EndPos < (ulong)Position)
{
return false;
}
if ((ulong)EndPos > AMemoryMgr.RamSize)
{
return false;
}
IntPtr MemAddress = new IntPtr(RamPtr + Position);
IntPtr MemSize = new IntPtr(Size);
return AMemoryWin32.IsRegionModified(MemAddress, MemSize, Reset: true) != 0;
}
public sbyte ReadSByte(long Position)
{
return (sbyte)ReadByte(Position);
}
public short ReadInt16(long Position)
{
return (short)ReadUInt16(Position);
}
public int ReadInt32(long Position)
{
return (int)ReadUInt32(Position);
}
public long ReadInt64(long Position)
{
return (long)ReadUInt64(Position);
}
public byte ReadByte(long Position)
{
EnsureAccessIsValid(Position, AMemoryPerm.Read);
return ReadByteUnchecked(Position);
}
public ushort ReadUInt16(long Position)
{
EnsureAccessIsValid(Position + 0, AMemoryPerm.Read);
EnsureAccessIsValid(Position + 1, AMemoryPerm.Read);
return ReadUInt16Unchecked(Position);
}
public uint ReadUInt32(long Position)
{
EnsureAccessIsValid(Position + 0, AMemoryPerm.Read);
EnsureAccessIsValid(Position + 3, AMemoryPerm.Read);
return ReadUInt32Unchecked(Position);
}
public ulong ReadUInt64(long Position)
{
EnsureAccessIsValid(Position + 0, AMemoryPerm.Read);
EnsureAccessIsValid(Position + 7, AMemoryPerm.Read);
return ReadUInt64Unchecked(Position);
}
public Vector128<float> ReadVector8(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();
}
}
public Vector128<float> ReadVector16(long Position)
{
if (Sse2.IsSupported)
{
return Sse.StaticCast<ushort, float>(Sse2.Insert(Sse2.SetZeroVector128<ushort>(), ReadUInt16(Position), 0));
}
else
{
throw new PlatformNotSupportedException();
}
}
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));
}
else
{
throw new PlatformNotSupportedException();
}
}
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)));
}
else
{
throw new PlatformNotSupportedException();
}
}
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 byte[] ReadBytes(long Position, long Size)
{
if ((uint)Size > int.MaxValue)
{
throw new ArgumentOutOfRangeException(nameof(Size));
}
EnsureRangeIsValid(Position, Size, AMemoryPerm.Read);
byte[] Data = new byte[Size];
Marshal.Copy((IntPtr)(RamPtr + (uint)Position), Data, 0, (int)Size);
return Data;
}
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));
}
else
{
throw new PlatformNotSupportedException();
}
}
public void WriteSByte(long Position, sbyte Value)
{
WriteByte(Position, (byte)Value);
}
public void WriteInt16(long Position, short Value)
{
WriteUInt16(Position, (ushort)Value);
}
public void WriteInt32(long Position, int Value)
{
WriteUInt32(Position, (uint)Value);
}
public void WriteInt64(long Position, long Value)
{
WriteUInt64(Position, (ulong)Value);
}
public void WriteByte(long Position, byte Value)
{
EnsureAccessIsValid(Position, AMemoryPerm.Write);
WriteByteUnchecked(Position, Value);
}
public void WriteUInt16(long Position, ushort Value)
{
EnsureAccessIsValid(Position + 0, AMemoryPerm.Write);
EnsureAccessIsValid(Position + 1, AMemoryPerm.Write);
WriteUInt16Unchecked(Position, Value);
}
public void WriteUInt32(long Position, uint Value)
{
EnsureAccessIsValid(Position + 0, AMemoryPerm.Write);
EnsureAccessIsValid(Position + 3, AMemoryPerm.Write);
WriteUInt32Unchecked(Position, Value);
}
public void WriteUInt64(long Position, ulong Value)
{
EnsureAccessIsValid(Position + 0, AMemoryPerm.Write);
EnsureAccessIsValid(Position + 7, AMemoryPerm.Write);
WriteUInt64Unchecked(Position, Value);
}
public void WriteVector8(long Position, Vector128<float> Value)
{
if (Sse41.IsSupported)
{
WriteByte(Position, Sse41.Extract(Sse.StaticCast<float, byte>(Value), 0));
}
else if (Sse2.IsSupported)
{
WriteByte(Position, (byte)Sse2.Extract(Sse.StaticCast<float, ushort>(Value), 0));
}
else
{
throw new PlatformNotSupportedException();
}
}
public void WriteVector16(long Position, Vector128<float> Value)
{
if (Sse2.IsSupported)
{
WriteUInt16(Position, Sse2.Extract(Sse.StaticCast<float, ushort>(Value), 0));
}
else
{
throw new PlatformNotSupportedException();
}
}
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);
}
else
{
throw new PlatformNotSupportedException();
}
}
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));
}
else
{
throw new PlatformNotSupportedException();
}
}
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);
}
else
{
throw new PlatformNotSupportedException();
}
}
private void EnsureAccessIsValid(long Position, AMemoryPerm Perm)
{
if (!Manager.IsMapped(Position))
{
throw new VmmPageFaultException(Position);
}
if (!Manager.HasPermission(Position, Perm))
{
throw new VmmAccessViolationException(Position, Perm);
}
}
private void EnsureRangeIsValid(long Position, long Size, AMemoryPerm Perm)
{
long EndPos = Position + Size;
while ((ulong)Position < (ulong)EndPos)
{
EnsureAccessIsValid(Position, Perm);
Position += AMemoryMgr.PageSize;
}
}
public void Dispose()
{
Dispose(true);
}
protected virtual void Dispose(bool disposing)
{
if (Ram != IntPtr.Zero)
{
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
AMemoryWin32.Free(Ram);
}
else
{
Marshal.FreeHGlobal(Ram);
}
Ram = IntPtr.Zero;
}
}
}
}