==== 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                  0xd6ce4c57a80  P readable   P unreadable
mmap xz                0xd6c5aa37000  P unreadable P unreadable
mmap x                 0xd6cb9f5f000  P readable   P readable  
mmap nrx               0xd6c76c86000  P readable   P readable  
mmap nwx               0xd6cc9264000  P readable   P readable  
mmap xnwx              0xd6cdb9c4000  P readable   P readable  
main                   0xd6a2b3a0420  P readable   P unreadable
libc                   0xd6c99c38b70  P readable   P unreadable