==== 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                   0xe484c98f50  P readable   P unreadable
mmap xz                 0xe4bfd0f000  P unreadable P unreadable
mmap x                  0xe4cd37c000  P readable   P readable  
mmap nrx                0xe41bff0000  P readable   P readable  
mmap nwx                0xe4dd4de000  P readable   P readable  
mmap xnwx               0xe48b9e4000  P readable   P readable  
main                    0xe202c4c420  P readable   P unreadable
libc                    0xe48414c010  P readable   P unreadable