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Add NE header parsing tp builder

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This commit is contained in:
Matt Nadareski
2022-11-06 21:19:48 -08:00
parent caaf983b3d
commit 2801520546
2 changed files with 119 additions and 5 deletions
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2
BurnOutSharp.Builder/MSDOS.cs
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@@ -79,7 +79,7 @@ namespace BurnOutSharp.Builder
header.Magic = new char[2];
for (int i = 0; i < header.Magic.Length; i++)
{
header.Magic[i] = (char)data[offset]; offset++;
header.Magic[i] = data.ReadChar(ref offset);
}
if (header.Magic[0] != 'M' || header.Magic[1] != 'Z')
return null;

122
BurnOutSharp.Builder/NewExecutable.cs
View File

@@ -38,6 +38,14 @@ namespace BurnOutSharp.Builder
// Set the MS-DOS stub
executable.Stub = stub;
// Try to parse the executable header
var executableHeader = ParseExecutableHeader(data, offset);
if (executableHeader == null)
return null;
// Set the executable header
executable.Header = executableHeader;
// TODO: Implement NE parsing
return null;
}
@@ -50,8 +58,57 @@ namespace BurnOutSharp.Builder
/// <returns>Filled executable header on success, null on error</returns>
private static ExecutableHeader ParseExecutableHeader(byte[] data, int offset)
{
// TODO: Implement NE header parsing
return null;
// If we don't have enough data
if (data.Length < 0x40)
return null;
// If the offset means we don't have enough data
if (data.Length - offset < 0x40)
return null;
// TODO: Use marshalling here instead of building
var header = new ExecutableHeader();
header.Magic = new char[2];
for (int i = 0; i < header.Magic.Length; i++)
{
header.Magic[i] = data.ReadChar(ref offset);
}
if (header.Magic[0] != 'N' || header.Magic[1] != 'E')
return null;
header.LinkerVersion = data.ReadByte(ref offset);
header.LinkerRevision = data.ReadByte(ref offset);
header.EntryTableOffset = data.ReadUInt16(ref offset);
header.EntryTableSize = data.ReadUInt16(ref offset);
header.CrcChecksum = data.ReadUInt32(ref offset);
header.FlagWord = (HeaderFlag)data.ReadUInt16(ref offset);
header.AutomaticDataSegmentNumber = data.ReadUInt16(ref offset);
header.InitialHeapAlloc = data.ReadUInt16(ref offset);
header.InitialStackAlloc = data.ReadUInt16(ref offset);
header.InitialCSIPSetting = data.ReadUInt32(ref offset);
header.InitialSSSPSetting = data.ReadUInt32(ref offset);
header.FileSegmentCount = data.ReadUInt16(ref offset);
header.ModuleReferenceTableSize = data.ReadUInt16(ref offset);
header.NonResidentNameTableSize = data.ReadUInt16(ref offset);
header.SegmentTableOffset = data.ReadUInt16(ref offset);
header.ResourceTableOffset = data.ReadUInt16(ref offset);
header.ResidentNameTableOffset = data.ReadUInt16(ref offset);
header.ModuleReferenceTableOffset = data.ReadUInt16(ref offset);
header.ImportedNamesTableOffset = data.ReadUInt16(ref offset);
header.NonResidentNamesTableOffset = data.ReadUInt32(ref offset);
header.MovableEntriesCount = data.ReadUInt16(ref offset);
header.SegmentAlignmentShiftCount = data.ReadUInt16(ref offset);
header.ResourceEntriesCount = data.ReadUInt16(ref offset);
header.TargetOperatingSystem = (OperatingSystem)data.ReadByte(ref offset);
header.AdditionalFlags = (OS2Flag)data.ReadByte(ref offset);
header.ReturnThunkOffset = data.ReadUInt16(ref offset);
header.SegmentReferenceThunkOffset = data.ReadUInt16(ref offset);
header.MinCodeSwapAreaSize = data.ReadUInt16(ref offset);
header.WindowsSDKRevision = data.ReadByte(ref offset);
header.WindowsSDKVersion = data.ReadByte(ref offset);
return header;
}
#endregion
@@ -87,6 +144,14 @@ namespace BurnOutSharp.Builder
// Set the MS-DOS stub
executable.Stub = stub;
// Try to parse the executable header
var executableHeader = ParseExecutableHeader(data);
if (executableHeader == null)
return null;
// Set the executable header
executable.Header = executableHeader;
// TODO: Implement NE parsing
return null;
}
@@ -98,8 +163,57 @@ namespace BurnOutSharp.Builder
/// <returns>Filled executable header on success, null on error</returns>
private static ExecutableHeader ParseExecutableHeader(Stream data)
{
// TODO: Implement NE header parsing
return null;
// If we don't have enough data
if (data.Length < 0x40)
return null;
// If the offset means we don't have enough data
if (data.Length - data.Position < 0x40)
return null;
// TODO: Use marshalling here instead of building
var header = new ExecutableHeader();
header.Magic = new char[2];
for (int i = 0; i < header.Magic.Length; i++)
{
header.Magic[i] = data.ReadChar();
}
if (header.Magic[0] != 'N' || header.Magic[1] != 'E')
return null;
header.LinkerVersion = data.ReadByteValue();
header.LinkerRevision = data.ReadByteValue();
header.EntryTableOffset = data.ReadUInt16();
header.EntryTableSize = data.ReadUInt16();
header.CrcChecksum = data.ReadUInt32();
header.FlagWord = (HeaderFlag)data.ReadUInt16();
header.AutomaticDataSegmentNumber = data.ReadUInt16();
header.InitialHeapAlloc = data.ReadUInt16();
header.InitialStackAlloc = data.ReadUInt16();
header.InitialCSIPSetting = data.ReadUInt32();
header.InitialSSSPSetting = data.ReadUInt32();
header.FileSegmentCount = data.ReadUInt16();
header.ModuleReferenceTableSize = data.ReadUInt16();
header.NonResidentNameTableSize = data.ReadUInt16();
header.SegmentTableOffset = data.ReadUInt16();
header.ResourceTableOffset = data.ReadUInt16();
header.ResidentNameTableOffset = data.ReadUInt16();
header.ModuleReferenceTableOffset = data.ReadUInt16();
header.ImportedNamesTableOffset = data.ReadUInt16();
header.NonResidentNamesTableOffset = data.ReadUInt32();
header.MovableEntriesCount = data.ReadUInt16();
header.SegmentAlignmentShiftCount = data.ReadUInt16();
header.ResourceEntriesCount = data.ReadUInt16();
header.TargetOperatingSystem = (OperatingSystem)data.ReadByteValue();
header.AdditionalFlags = (OS2Flag)data.ReadByteValue();
header.ReturnThunkOffset = data.ReadUInt16();
header.SegmentReferenceThunkOffset = data.ReadUInt16();
header.MinCodeSwapAreaSize = data.ReadUInt16();
header.WindowsSDKRevision = data.ReadByteValue();
header.WindowsSDKVersion = data.ReadByteValue();
return header;
}
#endregion