==== 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                  0x51f75ab8090  P readable   P unreadable
mmap xz                0x51f995af000  P unreadable P unreadable
mmap x                 0x52009ae9000  P readable   P readable  
mmap nrx               0x52017165000  P readable   P readable  
mmap nwx               0x51fc4b5e000  P readable   P readable  
mmap xnwx              0x52016f07000  P readable   P readable  
main                   0x51d33953420  P readable   P unreadable
libc                   0x51f551e3490  P readable   P unreadable