Better process implementation (#491)

* Initial implementation of KProcess

* Some improvements to the memory manager, implement back guest stack trace printing

* Better GetInfo implementation, improve checking in some places with information from process capabilities

* Allow the cpu to read/write from the correct memory locations for accesses crossing a page boundary

* Change long -> ulong for address/size on memory related methods to avoid unnecessary casts

* Attempt at implementing ldr:ro with new KProcess

* Allow BSS with size 0 on ldr:ro

* Add checking for memory block slab heap usage, return errors if full, exit gracefully

* Use KMemoryBlockSize const from KMemoryManager

* Allow all methods to read from non-contiguous locations

* Fix for TransactParcelAuto

* Address PR feedback, additionally fix some small issues related to the KIP loader and implement SVCs GetProcessId, GetProcessList, GetSystemInfo, CreatePort and ManageNamedPort

* Fix wrong check for source pages count from page list on MapPhysicalMemory

* Fix some issues with UnloadNro on ldr:ro

Ryujinx.HLE/DeviceMemory.cs

@@ -0,0 +1,126 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE
+{
+    class DeviceMemory : IDisposable
+    {
+        public const long RamSize = 4L * 1024 * 1024 * 1024;
+
+        public IntPtr RamPointer { get; private set; }
+
+        private unsafe byte* RamPtr;
+
+        public unsafe DeviceMemory()
+        {
+            RamPointer = Marshal.AllocHGlobal(new IntPtr(RamSize));
+
+            RamPtr = (byte*)RamPointer;
+        }
+
+        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 unsafe byte ReadByte(long Position)
+        {
+            return *((byte*)(RamPtr + Position));
+        }
+
+        public unsafe ushort ReadUInt16(long Position)
+        {
+            return *((ushort*)(RamPtr + Position));
+        }
+
+        public unsafe uint ReadUInt32(long Position)
+        {
+            return *((uint*)(RamPtr + Position));
+        }
+
+        public unsafe ulong ReadUInt64(long Position)
+        {
+            return *((ulong*)(RamPtr + Position));
+        }
+
+        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 unsafe void WriteByte(long Position, byte Value)
+        {
+            *((byte*)(RamPtr + Position)) = Value;
+        }
+
+        public unsafe void WriteUInt16(long Position, ushort Value)
+        {
+            *((ushort*)(RamPtr + Position)) = Value;
+        }
+
+        public unsafe void WriteUInt32(long Position, uint Value)
+        {
+            *((uint*)(RamPtr + Position)) = Value;
+        }
+
+        public unsafe void WriteUInt64(long Position, ulong Value)
+        {
+            *((ulong*)(RamPtr + Position)) = Value;
+        }
+
+        public void FillWithZeros(long Position, int Size)
+        {
+            int Size8 = Size & ~(8 - 1);
+
+            for (int Offs = 0; Offs < Size8; Offs += 8)
+            {
+                WriteInt64(Position + Offs, 0);
+            }
+
+            for (int Offs = Size8; Offs < (Size - Size8); Offs++)
+            {
+                WriteByte(Position + Offs, 0);
+            }
+        }
+
+        public void Dispose()
+        {
+            Dispose(true);
+        }
+
+        protected virtual void Dispose(bool Disposing)
+        {
+            Marshal.FreeHGlobal(RamPointer);
+        }
+    }
+}