@Override
	public int compareTo(ElfProgramHeader that) {
		//sort the headers putting 0xffffffff (new guys)
		//at the bottom...
		if (this.p_type == ElfProgramHeaderConstants.PT_LOAD) {
			if (this.p_vaddr < that.p_vaddr) {
				if (this.p_vaddr == 0xffffffff) {
					return 1;
				}
				return -1;
			}
			else if (this.p_vaddr > that.p_vaddr) {
				if (that.p_vaddr == 0xffffffff) {
					return -1;
				}
				return 1;
			}
		}
		return 0;
	}
@see ghidra.app.util.bin.StructConverter#toDataType()
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/elf/ElfProgramHeader.java