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ReadBytes function in AMemory, with cleaner range check. (#136)

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riperiperi 2018-06-09 01:15:02 +01:00 committed by gdkchan
parent f1027d5511
commit 81b59077f8
2 changed files with 20 additions and 12 deletions
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20
Memory/AMemory.cs
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@ -301,6 +301,15 @@ namespace ChocolArm64.Memory
return *((ulong*)(RamPtr + (uint)Position));
}
public byte[] ReadBytes(long Position, long Size)
{
EnsureRangeIsValid(Position, Size, AMemoryPerm.Read);
byte[] Result = new byte[Size];
Marshal.Copy((IntPtr)(RamPtr + (uint)Position), Result, 0, (int)Size);
return Result;
}
public Vector128<float> ReadVector8Unchecked(long Position)
{
if (Sse2.IsSupported)
@ -611,6 +620,17 @@ namespace ChocolArm64.Memory
}
}
private void EnsureRangeIsValid(long Position, long Size, AMemoryPerm Perm)
{
long EndPos = (Position + Size);
Position = Position & ~AMemoryMgr.PageMask; //check base of each page
while (Position < EndPos)
{
EnsureAccessIsValid(Position, Perm);
Position += AMemoryMgr.PageSize;
}
}
public void Dispose()
{
Dispose(true);

12
Memory/AMemoryHelper.cs
View file

@ -22,18 +22,6 @@ namespace ChocolArm64.Memory
}
}
public static byte[] ReadBytes(AMemory Memory, long Position, long Size)
{
byte[] Data = new byte[Size];
for (long Offs = 0; Offs < Size; Offs++)
{
Data[Offs] = (byte)Memory.ReadByte(Position + Offs);
}
return Data;
}
public static void WriteBytes(AMemory Memory, long Position, byte[] Data)
{
for (int Offs = 0; Offs < Data.Length; Offs++)