==== 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                  0xade67cd3340  P readable   P unreadable
mmap xz                0xadf285ca000  P unreadable P unreadable
mmap x                 0xadee7582000  P readable   P readable  
mmap nrx               0xade8b3b9000  P readable   P readable  
mmap nwx               0xadf1a0dd000  P readable   P readable  
mmap xnwx              0xadf08050000  P readable   P readable  
main                   0xadc649d2420  P readable   P unreadable
libc                   0xadef0ff8fb0  P readable   P unreadable