==== 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                  0xbd71b147e30  P readable   P unreadable
mmap xz                0xbd6cc3da000  P unreadable P unreadable
mmap x                 0xbd753ec9000  P readable   P readable  
mmap nrx               0xbd74bd04000  P readable   P readable  
mmap nwx               0xbd6f4c51000  P readable   P readable  
mmap xnwx              0xbd75eb52000  P readable   P readable  
main                   0xbd4c2478430  P readable   P unreadable
libc                   0xbd6e100eed0  P readable   P unreadable