==== 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                  0xe04d311eb50  P readable   P unreadable
mmap xz                0xe03e85a9000  P unreadable P unreadable
mmap x                 0xe0491b96000  P readable   P readable  
mmap nrx               0xe0458c78000  P readable   P readable  
mmap nwx               0xe04ae50f000  P readable   P readable  
mmap xnwx              0xe0406afd000  P readable   P readable  
main                   0xe01d333d420  P readable   P unreadable
libc                   0xe03db6c86f0  P readable   P unreadable