==== 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                  0xcf4b1fc3140  P readable   P unreadable
mmap xz                0xcf4efc3f000  P unreadable P unreadable
mmap x                 0xcf50a8c9000  P readable   P readable  
mmap nrx               0xcf509a76000  P readable   P readable  
mmap nwx               0xcf46f7e3000  P readable   P readable  
mmap xnwx              0xcf43fad5000  P readable   P readable  
main                   0xcf20c695430  P readable   P unreadable
libc                   0xcf46f5b4d60  P readable   P unreadable