915 lines
26 KiB
C#
915 lines
26 KiB
C#
using ChocolArm64.Events;
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using ChocolArm64.Exceptions;
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using ChocolArm64.Instructions;
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using System;
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using System.Collections.Concurrent;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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using System.Runtime.Intrinsics;
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using System.Runtime.Intrinsics.X86;
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using System.Threading;
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using static ChocolArm64.Memory.CompareExchange128;
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namespace ChocolArm64.Memory
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{
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public unsafe class MemoryManager : IMemory, IDisposable
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{
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private const int PtLvl0Bits = 13;
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private const int PtLvl1Bits = 14;
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public const int PageBits = 12;
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private const int PtLvl0Size = 1 << PtLvl0Bits;
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private const int PtLvl1Size = 1 << PtLvl1Bits;
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public const int PageSize = 1 << PageBits;
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private const int PtLvl0Mask = PtLvl0Size - 1;
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private const int PtLvl1Mask = PtLvl1Size - 1;
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public const int PageMask = PageSize - 1;
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private const int PtLvl0Bit = PageBits + PtLvl1Bits;
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private const int PtLvl1Bit = PageBits;
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private ConcurrentDictionary<long, IntPtr> _observedPages;
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public IntPtr Ram { get; private set; }
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private byte* _ramPtr;
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private byte*** _pageTable;
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public event EventHandler<MemoryAccessEventArgs> InvalidAccess;
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public event EventHandler<MemoryAccessEventArgs> ObservedAccess;
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public MemoryManager(IntPtr ram)
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{
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_observedPages = new ConcurrentDictionary<long, IntPtr>();
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Ram = ram;
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_ramPtr = (byte*)ram;
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_pageTable = (byte***)Marshal.AllocHGlobal(PtLvl0Size * IntPtr.Size);
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for (int l0 = 0; l0 < PtLvl0Size; l0++)
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{
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_pageTable[l0] = null;
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}
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}
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internal bool AtomicCompareExchange2xInt32(
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long position,
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int expectedLow,
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int expectedHigh,
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int desiredLow,
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int desiredHigh)
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{
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long expected = (uint)expectedLow;
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long desired = (uint)desiredLow;
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expected |= (long)expectedHigh << 32;
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desired |= (long)desiredHigh << 32;
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return AtomicCompareExchangeInt64(position, expected, desired);
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}
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internal bool AtomicCompareExchangeInt128(
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long position,
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ulong expectedLow,
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ulong expectedHigh,
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ulong desiredLow,
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ulong desiredHigh)
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{
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if ((position & 0xf) != 0)
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{
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AbortWithAlignmentFault(position);
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}
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IntPtr ptr = new IntPtr(TranslateWrite(position));
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return InterlockedCompareExchange128(ptr, expectedLow, expectedHigh, desiredLow, desiredHigh);
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}
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internal Vector128<float> AtomicReadInt128(long position)
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{
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if ((position & 0xf) != 0)
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{
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AbortWithAlignmentFault(position);
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}
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IntPtr ptr = new IntPtr(Translate(position));
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InterlockedRead128(ptr, out ulong low, out ulong high);
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Vector128<float> vector = default(Vector128<float>);
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vector = VectorHelper.VectorInsertInt(low, vector, 0, 3);
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vector = VectorHelper.VectorInsertInt(high, vector, 1, 3);
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return vector;
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}
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public bool AtomicCompareExchangeByte(long position, byte expected, byte desired)
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{
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int* ptr = (int*)Translate(position);
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int currentValue = *ptr;
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int expected32 = (currentValue & ~byte.MaxValue) | expected;
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int desired32 = (currentValue & ~byte.MaxValue) | desired;
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return Interlocked.CompareExchange(ref *ptr, desired32, expected32) == expected32;
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}
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public bool AtomicCompareExchangeInt16(long position, short expected, short desired)
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{
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if ((position & 1) != 0)
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{
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AbortWithAlignmentFault(position);
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}
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int* ptr = (int*)Translate(position);
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int currentValue = *ptr;
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int expected32 = (currentValue & ~ushort.MaxValue) | (ushort)expected;
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int desired32 = (currentValue & ~ushort.MaxValue) | (ushort)desired;
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return Interlocked.CompareExchange(ref *ptr, desired32, expected32) == expected32;
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}
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public bool AtomicCompareExchangeInt32(long position, int expected, int desired)
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{
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if ((position & 3) != 0)
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{
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AbortWithAlignmentFault(position);
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}
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int* ptr = (int*)TranslateWrite(position);
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return Interlocked.CompareExchange(ref *ptr, desired, expected) == expected;
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}
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public bool AtomicCompareExchangeInt64(long position, long expected, long desired)
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{
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if ((position & 7) != 0)
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{
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AbortWithAlignmentFault(position);
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}
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long* ptr = (long*)TranslateWrite(position);
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return Interlocked.CompareExchange(ref *ptr, desired, expected) == expected;
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}
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public int AtomicIncrementInt32(long position)
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{
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if ((position & 3) != 0)
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{
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AbortWithAlignmentFault(position);
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}
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int* ptr = (int*)TranslateWrite(position);
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return Interlocked.Increment(ref *ptr);
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}
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public int AtomicDecrementInt32(long position)
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{
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if ((position & 3) != 0)
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{
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AbortWithAlignmentFault(position);
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}
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int* ptr = (int*)TranslateWrite(position);
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return Interlocked.Decrement(ref *ptr);
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}
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private void AbortWithAlignmentFault(long position)
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{
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//TODO: Abort mode and exception support on the CPU.
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throw new InvalidOperationException($"Tried to compare exchange a misaligned address 0x{position:X16}.");
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}
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public sbyte ReadSByte(long position)
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{
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return (sbyte)ReadByte(position);
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}
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public short ReadInt16(long position)
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{
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return (short)ReadUInt16(position);
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}
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public int ReadInt32(long position)
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{
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return (int)ReadUInt32(position);
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}
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public long ReadInt64(long position)
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{
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return (long)ReadUInt64(position);
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}
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public byte ReadByte(long position)
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{
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return *((byte*)Translate(position));
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}
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public ushort ReadUInt16(long position)
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{
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if ((position & 1) == 0)
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{
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return *((ushort*)Translate(position));
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}
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else
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{
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return (ushort)(ReadByte(position + 0) << 0 |
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ReadByte(position + 1) << 8);
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}
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}
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public uint ReadUInt32(long position)
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{
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if ((position & 3) == 0)
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{
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return *((uint*)Translate(position));
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}
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else
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{
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return (uint)(ReadUInt16(position + 0) << 0 |
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ReadUInt16(position + 2) << 16);
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}
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}
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public ulong ReadUInt64(long position)
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{
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if ((position & 7) == 0)
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{
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return *((ulong*)Translate(position));
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}
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else
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{
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return (ulong)ReadUInt32(position + 0) << 0 |
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(ulong)ReadUInt32(position + 4) << 32;
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}
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}
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public Vector128<float> ReadVector8(long position)
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{
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if (Sse2.IsSupported)
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{
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return Sse.StaticCast<byte, float>(Sse2.SetVector128(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ReadByte(position)));
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}
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else
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{
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Vector128<float> value = VectorHelper.VectorSingleZero();
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value = VectorHelper.VectorInsertInt(ReadByte(position), value, 0, 0);
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return value;
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public Vector128<float> ReadVector16(long position)
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{
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if (Sse2.IsSupported && (position & 1) == 0)
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{
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return Sse.StaticCast<ushort, float>(Sse2.Insert(Sse2.SetZeroVector128<ushort>(), ReadUInt16(position), 0));
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}
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else
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{
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Vector128<float> value = VectorHelper.VectorSingleZero();
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value = VectorHelper.VectorInsertInt(ReadUInt16(position), value, 0, 1);
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return value;
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public Vector128<float> ReadVector32(long position)
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{
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if (Sse.IsSupported && (position & 3) == 0)
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{
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return Sse.LoadScalarVector128((float*)Translate(position));
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}
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else
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{
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Vector128<float> value = VectorHelper.VectorSingleZero();
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value = VectorHelper.VectorInsertInt(ReadUInt32(position), value, 0, 2);
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return value;
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public Vector128<float> ReadVector64(long position)
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{
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if (Sse2.IsSupported && (position & 7) == 0)
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{
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return Sse.StaticCast<double, float>(Sse2.LoadScalarVector128((double*)Translate(position)));
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}
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else
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{
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Vector128<float> value = VectorHelper.VectorSingleZero();
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value = VectorHelper.VectorInsertInt(ReadUInt64(position), value, 0, 3);
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return value;
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public Vector128<float> ReadVector128(long position)
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{
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if (Sse.IsSupported && (position & 15) == 0)
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{
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return Sse.LoadVector128((float*)Translate(position));
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}
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else
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{
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Vector128<float> value = VectorHelper.VectorSingleZero();
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value = VectorHelper.VectorInsertInt(ReadUInt64(position + 0), value, 0, 3);
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value = VectorHelper.VectorInsertInt(ReadUInt64(position + 8), value, 1, 3);
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return value;
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}
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}
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public byte[] ReadBytes(long position, long size)
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{
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long endAddr = position + size;
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if ((ulong)size > int.MaxValue)
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{
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throw new ArgumentOutOfRangeException(nameof(size));
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}
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if ((ulong)endAddr < (ulong)position)
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{
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throw new ArgumentOutOfRangeException(nameof(position));
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}
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byte[] data = new byte[size];
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int offset = 0;
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while ((ulong)position < (ulong)endAddr)
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{
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long pageLimit = (position + PageSize) & ~(long)PageMask;
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if ((ulong)pageLimit > (ulong)endAddr)
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{
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pageLimit = endAddr;
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}
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int copySize = (int)(pageLimit - position);
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Marshal.Copy((IntPtr)Translate(position), data, offset, copySize);
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position += copySize;
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offset += copySize;
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}
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return data;
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}
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public void ReadBytes(long position, byte[] data, int startIndex, int size)
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{
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//Note: This will be moved later.
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long endAddr = position + size;
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if ((ulong)size > int.MaxValue)
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{
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throw new ArgumentOutOfRangeException(nameof(size));
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}
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if ((ulong)endAddr < (ulong)position)
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{
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throw new ArgumentOutOfRangeException(nameof(position));
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}
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int offset = startIndex;
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while ((ulong)position < (ulong)endAddr)
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{
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long pageLimit = (position + PageSize) & ~(long)PageMask;
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if ((ulong)pageLimit > (ulong)endAddr)
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{
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pageLimit = endAddr;
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}
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int copySize = (int)(pageLimit - position);
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Marshal.Copy((IntPtr)Translate(position), data, offset, copySize);
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position += copySize;
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offset += copySize;
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}
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}
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public void WriteSByte(long position, sbyte value)
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{
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WriteByte(position, (byte)value);
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}
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public void WriteInt16(long position, short value)
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{
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WriteUInt16(position, (ushort)value);
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}
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public void WriteInt32(long position, int value)
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{
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WriteUInt32(position, (uint)value);
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}
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public void WriteInt64(long position, long value)
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{
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WriteUInt64(position, (ulong)value);
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}
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public void WriteByte(long position, byte value)
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{
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*((byte*)TranslateWrite(position)) = value;
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}
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public void WriteUInt16(long position, ushort value)
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{
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if ((position & 1) == 0)
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{
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*((ushort*)TranslateWrite(position)) = value;
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}
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else
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{
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WriteByte(position + 0, (byte)(value >> 0));
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WriteByte(position + 1, (byte)(value >> 8));
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}
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}
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public void WriteUInt32(long position, uint value)
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{
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if ((position & 3) == 0)
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{
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*((uint*)TranslateWrite(position)) = value;
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}
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else
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{
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WriteUInt16(position + 0, (ushort)(value >> 0));
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WriteUInt16(position + 2, (ushort)(value >> 16));
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}
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}
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public void WriteUInt64(long position, ulong value)
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{
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if ((position & 7) == 0)
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{
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*((ulong*)TranslateWrite(position)) = value;
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}
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else
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{
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WriteUInt32(position + 0, (uint)(value >> 0));
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WriteUInt32(position + 4, (uint)(value >> 32));
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public void WriteVector8(long position, Vector128<float> value)
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{
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if (Sse41.IsSupported)
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{
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WriteByte(position, Sse41.Extract(Sse.StaticCast<float, byte>(value), 0));
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}
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else if (Sse2.IsSupported)
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{
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WriteByte(position, (byte)Sse2.Extract(Sse.StaticCast<float, ushort>(value), 0));
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}
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else
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{
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WriteByte(position, (byte)VectorHelper.VectorExtractIntZx(value, 0, 0));
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public void WriteVector16(long position, Vector128<float> value)
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{
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if (Sse2.IsSupported)
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{
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WriteUInt16(position, Sse2.Extract(Sse.StaticCast<float, ushort>(value), 0));
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}
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else
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{
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WriteUInt16(position, (ushort)VectorHelper.VectorExtractIntZx(value, 0, 1));
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public void WriteVector32(long position, Vector128<float> value)
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{
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if (Sse.IsSupported && (position & 3) == 0)
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{
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Sse.StoreScalar((float*)TranslateWrite(position), value);
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}
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else
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{
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WriteUInt32(position, (uint)VectorHelper.VectorExtractIntZx(value, 0, 2));
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public void WriteVector64(long position, Vector128<float> value)
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{
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if (Sse2.IsSupported && (position & 7) == 0)
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{
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Sse2.StoreScalar((double*)TranslateWrite(position), Sse.StaticCast<float, double>(value));
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}
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else
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{
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WriteUInt64(position, VectorHelper.VectorExtractIntZx(value, 0, 3));
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}
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public void WriteVector128(long position, Vector128<float> value)
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{
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if (Sse.IsSupported && (position & 15) == 0)
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{
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Sse.Store((float*)TranslateWrite(position), value);
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}
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else
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{
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WriteUInt64(position + 0, VectorHelper.VectorExtractIntZx(value, 0, 3));
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WriteUInt64(position + 8, VectorHelper.VectorExtractIntZx(value, 1, 3));
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}
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}
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public void WriteBytes(long position, byte[] data)
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{
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long endAddr = position + data.Length;
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if ((ulong)endAddr < (ulong)position)
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{
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throw new ArgumentOutOfRangeException(nameof(position));
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}
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int offset = 0;
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while ((ulong)position < (ulong)endAddr)
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{
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long pageLimit = (position + PageSize) & ~(long)PageMask;
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if ((ulong)pageLimit > (ulong)endAddr)
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{
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pageLimit = endAddr;
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}
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int copySize = (int)(pageLimit - position);
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Marshal.Copy(data, offset, (IntPtr)TranslateWrite(position), copySize);
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position += copySize;
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offset += copySize;
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}
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}
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public void WriteBytes(long position, byte[] data, int startIndex, int size)
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{
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//Note: This will be moved later.
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long endAddr = position + size;
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if ((ulong)endAddr < (ulong)position)
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{
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throw new ArgumentOutOfRangeException(nameof(position));
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}
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int offset = startIndex;
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while ((ulong)position < (ulong)endAddr)
|
|
{
|
|
long pageLimit = (position + PageSize) & ~(long)PageMask;
|
|
|
|
if ((ulong)pageLimit > (ulong)endAddr)
|
|
{
|
|
pageLimit = endAddr;
|
|
}
|
|
|
|
int copySize = (int)(pageLimit - position);
|
|
|
|
Marshal.Copy(data, offset, (IntPtr)TranslateWrite(position), copySize);
|
|
|
|
position += copySize;
|
|
offset += copySize;
|
|
}
|
|
}
|
|
|
|
public void CopyBytes(long src, long dst, long size)
|
|
{
|
|
//Note: This will be moved later.
|
|
if (IsContiguous(src, size) &&
|
|
IsContiguous(dst, size))
|
|
{
|
|
byte* srcPtr = Translate(src);
|
|
byte* dstPtr = TranslateWrite(dst);
|
|
|
|
Buffer.MemoryCopy(srcPtr, dstPtr, size, size);
|
|
}
|
|
else
|
|
{
|
|
WriteBytes(dst, ReadBytes(src, size));
|
|
}
|
|
}
|
|
|
|
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 >> PageBits);
|
|
}
|
|
|
|
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 >> PageBits;
|
|
|
|
if (_observedPages.TryGetValue(key, out IntPtr ptr))
|
|
{
|
|
return (byte*)ptr + (position & PageMask);
|
|
}
|
|
|
|
InvalidAccess?.Invoke(this, new MemoryAccessEventArgs(position));
|
|
|
|
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 >> PageBits;
|
|
|
|
MemoryAccessEventArgs e = new MemoryAccessEventArgs(position);
|
|
|
|
if (_observedPages.TryGetValue(key, out IntPtr ptr))
|
|
{
|
|
SetPtEntry(position, (byte*)ptr);
|
|
|
|
ObservedAccess?.Invoke(this, e);
|
|
|
|
return (byte*)ptr + (position & PageMask);
|
|
}
|
|
|
|
InvalidAccess?.Invoke(this, e);
|
|
|
|
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 void StartObservingRegion(long position, long size)
|
|
{
|
|
long endPosition = (position + size + PageMask) & ~PageMask;
|
|
|
|
position &= ~PageMask;
|
|
|
|
while ((ulong)position < (ulong)endPosition)
|
|
{
|
|
_observedPages[position >> PageBits] = (IntPtr)Translate(position);
|
|
|
|
SetPtEntry(position, null);
|
|
|
|
position += PageSize;
|
|
}
|
|
}
|
|
|
|
public void StopObservingRegion(long position, long size)
|
|
{
|
|
long endPosition = (position + size + PageMask) & ~PageMask;
|
|
|
|
while (position < endPosition)
|
|
{
|
|
lock (_observedPages)
|
|
{
|
|
if (_observedPages.TryRemove(position >> PageBits, out IntPtr ptr))
|
|
{
|
|
SetPtEntry(position, (byte*)ptr);
|
|
}
|
|
}
|
|
|
|
position += PageSize;
|
|
}
|
|
}
|
|
|
|
public bool TryGetHostAddress(long position, long size, out IntPtr ptr)
|
|
{
|
|
if (IsContiguous(position, size))
|
|
{
|
|
ptr = (IntPtr)Translate(position);
|
|
|
|
return true;
|
|
}
|
|
|
|
ptr = IntPtr.Zero;
|
|
|
|
return false;
|
|
}
|
|
|
|
private bool IsContiguous(long position, long size)
|
|
{
|
|
long endPos = position + size;
|
|
|
|
position &= ~PageMask;
|
|
|
|
long expectedPa = GetPhysicalAddress(position);
|
|
|
|
while ((ulong)position < (ulong)endPos)
|
|
{
|
|
long pa = GetPhysicalAddress(position);
|
|
|
|
if (pa != expectedPa)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
position += PageSize;
|
|
expectedPa += PageSize;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
public bool IsValidPosition(long position)
|
|
{
|
|
return position >> (PtLvl0Bits + PtLvl1Bits + PageBits) == 0;
|
|
}
|
|
|
|
public void Dispose()
|
|
{
|
|
Dispose(true);
|
|
}
|
|
|
|
protected virtual void Dispose(bool disposing)
|
|
{
|
|
if (_pageTable == null)
|
|
{
|
|
return;
|
|
}
|
|
|
|
for (int l0 = 0; l0 < PtLvl0Size; l0++)
|
|
{
|
|
if (_pageTable[l0] != null)
|
|
{
|
|
Marshal.FreeHGlobal((IntPtr)_pageTable[l0]);
|
|
}
|
|
|
|
_pageTable[l0] = null;
|
|
}
|
|
|
|
Marshal.FreeHGlobal((IntPtr)_pageTable);
|
|
|
|
_pageTable = null;
|
|
}
|
|
}
|
|
} |