int flags, int fd, Offset offset) { return null;
int flags, int fd, Offset offset) { return VM_SysCallMagic.sysMMapErrno(VM_BootRecord.the_boot_record.sysMMapErrnoIP, start, length, protection, flags, fd, offset);
  public static Address sysMMapErrno(Address start, Extent length, int protection,                                        int flags, int fd, Offset offset) {     return null;   }