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

1 files changed, 149 insertions, 0 deletions

diff --git a/Ryujinx.HLE/Loaders/Executables/KernelInitialProcess.cs b/Ryujinx.HLE/Loaders/Executables/KernelInitialProcess.cs
new file mode 100644
index 00000000..1395d56f
--- /dev/null
+++ b/Ryujinx.HLE/Loaders/Executables/KernelInitialProcess.cs
@@ -0,0 +1,149 @@
+using Ryujinx.HLE.Loaders.Compression;
+using System.IO;
+
+namespace Ryujinx.HLE.Loaders.Executables
+{
+    class KernelInitialProcess : IExecutable
+    {
+        public string Name { get; private set; }
+
+        public long TitleId { get; private set; }
+
+        public int ProcessCategory { get; private set; }
+
+        public byte MainThreadPriority { get; private set; }
+        public byte DefaultProcessorId { get; private set; }
+
+        public bool Is64Bits   { get; private set; }
+        public bool Addr39Bits { get; private set; }
+        public bool IsService  { get; private set; }
+
+        public byte[] Text { get; private set; }
+        public byte[] RO   { get; private set; }
+        public byte[] Data { get; private set; }
+
+        public int TextOffset { get; private set; }
+        public int ROOffset   { get; private set; }
+        public int DataOffset { get; private set; }
+        public int BssOffset  { get; private set; }
+        public int BssSize    { get; private set; }
+
+        public int MainThreadStackSize { get; private set; }
+
+        public int[] Capabilities { get; private set; }
+
+        private struct SegmentHeader
+        {
+            public int Offset           { get; private set; }
+            public int DecompressedSize { get; private set; }
+            public int CompressedSize   { get; private set; }
+            public int Attribute        { get; private set; }
+
+            public SegmentHeader(
+                int Offset,
+                int DecompressedSize,
+                int CompressedSize,
+                int Attribute)
+            {
+                this.Offset           = Offset;
+                this.DecompressedSize = DecompressedSize;
+                this.CompressedSize   = CompressedSize;
+                this.Attribute        = Attribute;
+            }
+        }
+
+        public KernelInitialProcess(Stream Input)
+        {
+            BinaryReader Reader = new BinaryReader(Input);
+
+            string Magic = ReadString(Reader, 4);
+
+            if (Magic != "KIP1")
+            {
+
+            }
+
+            Name = ReadString(Reader, 12);
+
+            TitleId = Reader.ReadInt64();
+
+            ProcessCategory = Reader.ReadInt32();
+
+            MainThreadPriority = Reader.ReadByte();
+            DefaultProcessorId = Reader.ReadByte();
+
+            byte Reserved = Reader.ReadByte();
+            byte Flags    = Reader.ReadByte();
+
+            Is64Bits   = (Flags & 0x08) != 0;
+            Addr39Bits = (Flags & 0x10) != 0;
+            IsService  = (Flags & 0x20) != 0;
+
+            SegmentHeader[] Segments = new SegmentHeader[6];
+
+            for (int Index = 0; Index < Segments.Length; Index++)
+            {
+                Segments[Index] = new SegmentHeader(
+                    Reader.ReadInt32(),
+                    Reader.ReadInt32(),
+                    Reader.ReadInt32(),
+                    Reader.ReadInt32());
+            }
+
+            TextOffset = Segments[0].Offset;
+            ROOffset   = Segments[1].Offset;
+            DataOffset = Segments[2].Offset;
+            BssOffset  = Segments[3].Offset;
+            BssSize    = Segments[3].DecompressedSize;
+
+            MainThreadStackSize = Segments[1].Attribute;
+
+            Capabilities = new int[8];
+
+            for (int Index = 0; Index < Capabilities.Length; Index++)
+            {
+                Capabilities[Index] = Reader.ReadInt32();
+            }
+
+            Input.Seek(0x100, SeekOrigin.Begin);
+
+            Text = ReadSegment(Segments[0], Input);
+            RO   = ReadSegment(Segments[1], Input);
+            Data = ReadSegment(Segments[2], Input);
+        }
+
+        private byte[] ReadSegment(SegmentHeader Header, Stream Input)
+        {
+            long End = Input.Position + Header.CompressedSize;
+
+            Input.Seek(End, SeekOrigin.Begin);
+
+            byte[] Data = BackwardsLz.Decompress(Input, Header.DecompressedSize);
+
+            Input.Seek(End, SeekOrigin.Begin);
+
+            return Data;
+        }
+
+        private static string ReadString(BinaryReader Reader, int MaxSize)
+        {
+            string Value = string.Empty;
+
+            for (int Index = 0; Index < MaxSize; Index++)
+            {
+                char Chr = (char)Reader.ReadByte();
+
+                if (Chr == '\0')
+                {
+                    Reader.BaseStream.Seek(MaxSize - Index - 1, SeekOrigin.Current);
+
+                    break;
+                }
+
+                Value += Chr;
+            }
+
+            return Value;
+        }
+    }
+}
\ No newline at end of file