==== 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                  0xcb66d7f3820  P readable   P unreadable
mmap xz                0xcb7499f7000  P unreadable P unreadable
mmap x                 0xcb692924000  P readable   P readable  
mmap nrx               0xcb712ec9000  P readable   P readable  
mmap nwx               0xcb7055ca000  P readable   P readable  
mmap xnwx              0xcb6a2409000  P readable   P readable  
main                   0xcb45a608420  P readable   P unreadable
libc                   0xcb73cb1ae60  P readable   P unreadable