public static ByteProvider extractSegment(ByteProvider provider, SegmentCommand segment,
			FSRL fsrl, TaskMonitor monitor) throws IOException, MachException, CancelledException {

		int magic = MachConstants.MH_MAGIC_64;
		int allSegmentsSize = SegmentCommand.size(magic);

		// Mach-O Header
		byte[] header =
			MachHeader.create(magic, 0x100000c, 0x80000002, 6, 1, allSegmentsSize, 0x42100085, 0);

		// Segment command
		byte[] segmentCommandBytes =
			SegmentCommand.create(magic, segment.getSegmentName(), segment.getVMaddress(),
				segment.getVMsize(), header.length + allSegmentsSize, segment.getFileSize(),
				segment.getMaxProtection(), segment.getInitProtection(), segment.getFlags());

		// Segment data
		byte[] segmentDataBytes =
			provider.readBytes(segment.getFileOffset(), segment.getFileSize());

		// Combine pieces
		int totalSize = header.length + allSegmentsSize + segmentDataBytes.length;
		byte[] result = new byte[totalSize + FOOTER_V1.length];
		System.arraycopy(header, 0, result, 0, header.length);
		System.arraycopy(segmentCommandBytes, 0, result, header.length, segmentCommandBytes.length);
		System.arraycopy(segmentDataBytes, 0, result, header.length + segmentCommandBytes.length,
			segmentDataBytes.length);

		// Add footer
		System.arraycopy(FOOTER_V1, 0, result, result.length - FOOTER_V1.length, FOOTER_V1.length);

		return new ByteArrayProvider(result, fsrl);
	}
Gets a {@link ByteProvider} that contains a single segment from a Mach-O file set

@param provider The Mach-O file set {@link ByteProvider}
@param segment The segment to extract
@param fsrl {@link FSRL} to assign to the resulting {@link ByteProvider}
@param monitor {@link TaskMonitor}
@return {@link ByteProvider} containing the bytes of the single-segment Mach-O
@throws MachException If there was an error creating Mach-O headers
@throws IOException If there was an IO-related issue with extracting the segment
@throws CancelledException If the user cancelled the operation
Ghidra/Features/FileFormats/src/main/java/ghidra/file/formats/ios/fileset/MachoFileSetExtractor.java