==== 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                  0xbed2f90d7e0  P readable   P unreadable
mmap xz                0xbecffe98000  P unreadable P unreadable
mmap x                 0xbed2ad59000  P readable   P readable  
mmap nrx               0xbed7ed6e000  P readable   P readable  
mmap nwx               0xbed98f0a000  P readable   P readable  
mmap xnwx              0xbed124a7000  P readable   P readable  
main                   0xbeaccac5420  P readable   P unreadable
libc                   0xbed83ad38d0  P readable   P unreadable