==== 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                  0xfbb39f6de40  P readable   P unreadable
mmap xz                0xfbab151f000  P unreadable P unreadable
mmap x                 0xfbb34a56000  P readable   P readable  
mmap nrx               0xfbb539de000  P readable   P readable  
mmap nwx               0xfbaffa07000  P readable   P readable  
mmap xnwx              0xfbb65e98000  P readable   P readable  
main                   0xfb8a3724410  P readable   P unreadable
libc                   0xfbacf7d7d80  P readable   P unreadable