==== 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                  0xceca637e170  P readable   P unreadable
mmap xz                0xcec859e6000  P unreadable P unreadable
mmap x                 0xceccf731000  P readable   P readable  
mmap nrx               0xcecb5f38000  P readable   P readable  
mmap nwx               0xceca1b8e000  P readable   P readable  
mmap xnwx              0xcec77dde000  P readable   P readable  
main                   0xcea5619c420  P readable   P unreadable
libc                   0xcecd4b1ab00  P readable   P unreadable