==== 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                  0xd6bd33b72c0  P readable   P unreadable
mmap xz                0xd6b96738000  P unreadable P unreadable
mmap x                 0xd6bba692000  P readable   P readable  
mmap nrx               0xd6ba5de7000  P readable   P readable  
mmap nwx               0xd6bfbb33000  P readable   P readable  
mmap xnwx              0xd6c3d259000  P readable   P readable  
main                   0xd696eb38420  P readable   P unreadable
libc                   0xd6bec662e60  P readable   P unreadable