protected override void PackageData(WritingContext SW)
{
// Write the segment load command
SW.WriteFixedASCII(SegmentName, 16);
SW.WriteUInt(VirtualAddress, AddressSize);
SW.WriteUInt(VirtualSize, AddressSize);
// Offset to first segment
//@TODO: These file offsets and file lengths aren't correct (compared to the original MachO's)
OffsetFieldU32or64 FileOffset = SW.WriteDeferredOffsetFrom(0, AddressSize);
LengthFieldU32or64 FileLength = SW.WriteDeferredLength(0, AddressSize);
SW.Write(MaxProt);
SW.Write(InitProt);
SW.Write(Sections.Count);
SW.Write(Flags);
// Enqueue a job to commit the file offset to the first section
SW.CurrentPhase.PendingWrites.Enqueue(delegate(WritingContext Context)
{
FileLength.Rebase(Context.Position);
FileOffset.Commit(Context);
});
// Write the sections belonging to the segment
foreach (MachSection Section in Sections)
{
Section.Write(SW);
}
// Enqueue a job to commit the length of data in all the sections
SW.CurrentPhase.PendingWrites.Enqueue(delegate(WritingContext Context)
{
FileLength.Commit(Context);
});
}
public void Write(WritingContext SW)
{
SW.WriteFixedASCII(SectionName, 16);
SW.WriteFixedASCII(SegmentName, 16);
SW.WriteUInt(Addr, AddressSize);
SW.WriteUInt(Size, AddressSize);
SW.WriteAbsoluteOffsetAndDelayedData(SectionData, 1 << (byte)LogAlignment, AddressSize);
SW.Write(LogAlignment);
SW.Write(RelocationOffset);
SW.Write(NumRelocations);
SW.Write((UInt32)Flags);
SW.Write(Reserved1);
SW.Write(Reserved2);
if (AddressSize == Bits.Num._64)
SW.Write(Reserved3);
}
/// <summary>
/// Patches just the file length of this segment in an existing file
/// </summary>
public void PatchFileLength(WritingContext SW, UInt32 NewLength)
{
Debug.Assert(StartingLoadOffset >= 0);
if (Config.bCodeSignVerbose)
{
Console.WriteLine("ZZZZZZZZZZZZZZZZ");
Console.WriteLine(" Segment Length from 0x{0:X} to 0x{1:X} (delta {2})", FileSize, NewLength, (long)NewLength - (long)FileSize);
Console.WriteLine("ZZZZZZZZZZZZZZZZ");
}
FileSize = NewLength;
long PatchOffset = StartingLoadOffset + (2 * sizeof(UInt32)); // Command, CommandLength
PatchOffset += 16; // SegmentName
PatchOffset += 3 * Bits.Bytes(AddressSize); // VirtualAddress, VirtualSize, FileOffset
SW.PushPositionAndJump(PatchOffset);
SW.WriteUInt(FileSize, AddressSize);
SW.PopPosition();
}
public void Commit(WritingContext Context)
{
long CurrentPos = Context.Position;
long Length = CurrentPos - AnchorPoint;
if (AddressSize == Bits.Num._32)
{
Debug.Assert((Length >= UInt32.MinValue) && (Length <= UInt32.MaxValue));
}
Context.PushPositionAndJump(WritePoint);
Context.WriteUInt((UInt64)Length, AddressSize);
Context.PopPosition();
}