==== 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                  0xcf0564ab100  P readable   P unreadable
mmap xz                0xcf0c6d1f000  P unreadable P unreadable
mmap x                 0xcf0867e9000  P readable   P readable  
mmap nrx               0xcf0a8194000  P readable   P readable  
mmap nwx               0xcf0c2401000  P readable   P readable  
mmap xnwx              0xcf075bfe000  P readable   P readable  
main                   0xcedfa8c4410  P readable   P unreadable
libc                   0xcf0ae05b5b0  P readable   P unreadable