==== 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                  0xf03a84a8570  P readable   P unreadable
mmap xz                0xf0414006000  P unreadable P unreadable
mmap x                 0xf03ec5a7000  P readable   P readable  
mmap nrx               0xf0458b0e000  P readable   P readable  
mmap nwx               0xf03df68e000  P readable   P readable  
mmap xnwx              0xf0471faf000  P readable   P readable  
main                   0xf017f470420  P readable   P unreadable
libc                   0xf03d837a690  P readable   P unreadable