==== 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                  0xa9df631b150  P readable   P unreadable
mmap xz                0xa9e674ce000  P unreadable P unreadable
mmap x                 0xa9e24f80000  P readable   P readable  
mmap nrx               0xa9e8b517000  P readable   P readable  
mmap nwx               0xa9e10d43000  P readable   P readable  
mmap xnwx              0xa9df7fcc000  P readable   P readable  
main                   0xa9b985e5420  P readable   P unreadable
libc                   0xa9e00422040  P readable   P unreadable