_aiorw
extern int _aiorw(int, caddr_t, int, offset_t, int, aio_result_t *, int);
return (_aiorw(fd, buf, bufsz, offset, whence, resultp, AIOREAD));
return (_aiorw(fd, buf, bufsz, offset, whence, resultp, AIOWRITE));
return (_aiorw(fd, buf, bufsz, offset, whence, resultp, AIOAREAD64));
return (_aiorw(fd, buf, bufsz, offset, whence, resultp, AIOAWRITE64));