ryujinx/Ryujinx.HLE/Loaders/Executables/NsoExecutable.cs

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C#
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using LibHac.Common;
using LibHac.Fs;
using LibHac.FsSystem;
using LibHac.Loader;
using Ryujinx.Common.Logging;
using System;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
namespace Ryujinx.HLE.Loaders.Executables
{
class NsoExecutable : IExecutable
{
public byte[] Program { get; }
public Span<byte> Text => Program.AsSpan().Slice(TextOffset, TextSize);
public Span<byte> Ro => Program.AsSpan().Slice(RoOffset, RoSize);
public Span<byte> Data => Program.AsSpan().Slice(DataOffset, DataSize);
public int TextOffset { get; }
public int RoOffset { get; }
public int DataOffset { get; }
public int BssOffset => DataOffset + Data.Length;
public int TextSize { get; }
public int RoSize { get; }
public int DataSize { get; }
public int BssSize { get; }
public string Name;
public Buffer32 BuildId;
public NsoExecutable(IStorage inStorage, string name = null)
{
NsoReader reader = new NsoReader();
reader.Initialize(inStorage.AsFile(OpenMode.Read)).ThrowIfFailure();
TextOffset = (int)reader.Header.Segments[0].MemoryOffset;
RoOffset = (int)reader.Header.Segments[1].MemoryOffset;
DataOffset = (int)reader.Header.Segments[2].MemoryOffset;
BssSize = (int)reader.Header.BssSize;
reader.GetSegmentSize(NsoReader.SegmentType.Data, out uint uncompressedSize).ThrowIfFailure();
Program = new byte[DataOffset + uncompressedSize];
TextSize = DecompressSection(reader, NsoReader.SegmentType.Text, TextOffset);
RoSize = DecompressSection(reader, NsoReader.SegmentType.Ro, RoOffset);
DataSize = DecompressSection(reader, NsoReader.SegmentType.Data, DataOffset);
Name = name;
BuildId = reader.Header.ModuleId;
PrintRoSectionInfo();
}
private int DecompressSection(NsoReader reader, NsoReader.SegmentType segmentType, int offset)
{
reader.GetSegmentSize(segmentType, out uint uncompressedSize).ThrowIfFailure();
var span = Program.AsSpan().Slice(offset, (int)uncompressedSize);
reader.ReadSegment(segmentType, span).ThrowIfFailure();
return (int)uncompressedSize;
}
private void PrintRoSectionInfo()
{
byte[] roBuffer = Ro.ToArray();
string rawTextBuffer = Encoding.ASCII.GetString(roBuffer, 0, RoSize);
StringBuilder stringBuilder = new StringBuilder();
int zero = BitConverter.ToInt32(roBuffer, 0);
if (zero == 0)
{
int length = BitConverter.ToInt32(roBuffer, 4);
string modulePath = Encoding.UTF8.GetString(roBuffer, 8, length);
MatchCollection moduleMatches = Regex.Matches(rawTextBuffer, @"[a-z]:[\\/][ -~]{5,}\.nss", RegexOptions.IgnoreCase);
if (moduleMatches.Count > 0)
{
modulePath = moduleMatches.First().Value;
}
stringBuilder.AppendLine($" Module: {modulePath}");
}
MatchCollection fsSdkMatches = Regex.Matches(rawTextBuffer, @"sdk_version: ([0-9.]*)");
if (fsSdkMatches.Count != 0)
{
stringBuilder.AppendLine($" FS SDK Version: {fsSdkMatches.First().Value.Replace("sdk_version: ", "")}");
}
MatchCollection sdkMwMatches = Regex.Matches(rawTextBuffer, @"SDK MW[ -~]*");
if (sdkMwMatches.Count != 0)
{
string libHeader = " SDK Libraries: ";
string libContent = string.Join($"\n{new string(' ', libHeader.Length)}", sdkMwMatches);
stringBuilder.AppendLine($"{libHeader}{libContent}");
}
if (stringBuilder.Length > 0)
{
Logger.Info?.Print(LogClass.Loader, $"{Name}:\n{stringBuilder.ToString().TrimEnd('\r', '\n')}");
}
}
}
}