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using Ryujinx.HLE.Loaders.Compression;
using System.IO;
namespace Ryujinx.HLE.Loaders.Executables
{
class KernelInitialProcess : IExecutable
{
public string Name { get; }
public long TitleId { get; }
public int ProcessCategory { get; }
public byte MainThreadPriority { get; }
public byte DefaultProcessorId { get; }
public bool Is64Bits { get; }
public bool Addr39Bits { get; }
public bool IsService { get; }
public byte[] Text { get; }
public byte[] Ro { get; }
public byte[] Data { get; }
public int TextOffset { get; }
public int RoOffset { get; }
public int DataOffset { get; }
public int BssOffset { get; }
public int BssSize { get; }
public int MainThreadStackSize { get; }
public int[] Capabilities { get; }
private struct SegmentHeader
{
public int Offset { get; }
public int DecompressedSize { get; }
public int CompressedSize { get; }
public int Attribute { get; }
public SegmentHeader(
int offset,
int decompressedSize,
int compressedSize,
int attribute)
{
Offset = offset;
DecompressedSize = decompressedSize;
CompressedSize = compressedSize;
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;
}
}
}
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