==== run-regress-xonly ====
cc -O2 -pipe  -g -Wall -Wpointer-arith -Wuninitialized -Wstrict-prototypes -Wmissing-prototypes -Wunused -Wsign-compare -Wshadow  -MD -MP  -c /home/src/regress/sys/kern/xonly/xonly.c
cc   -o xonly xonly.o 
./xonly
                                      userland     kernel
ld.so                  0xcbc25e58a20  P readable   P unreadable
mmap xz                0xcbbfb9d9000  P unreadable P unreadable
mmap x                 0xcbc9e99a000  P readable   P readable  
mmap nrx               0xcbc50a33000  P readable   P readable  
mmap nwx               0xcbcaa814000  P readable   P readable  
mmap xnwx              0xcbc5ce0d000  P readable   P readable  
main                   0xcb9f1d65420  P readable   P unreadable
libc                   0xcbc046b50d0  P readable   P unreadable