==== 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                  0xcf607a1b990  P readable   P unreadable
mmap xz                0xcf595eb8000  P unreadable P unreadable
mmap x                 0xcf54a976000  P readable   P readable  
mmap nrx               0xcf5b36fb000  P readable   P readable  
mmap nwx               0xcf5b9c66000  P readable   P readable  
mmap xnwx              0xcf606600000  P readable   P readable  
main                   0xcf30bc82420  P readable   P unreadable
libc                   0xcf55e4ad110  P readable   P unreadable