==== 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                  0xea2e29a1370  P readable   P unreadable
mmap xz                0xea3a833c000  P unreadable P unreadable
mmap x                 0xea31e4c9000  P readable   P readable  
mmap nrx               0xea3203d1000  P readable   P readable  
mmap nwx               0xea355a1e000  P readable   P readable  
mmap xnwx              0xea2eb75a000  P readable   P readable  
main                   0xea0cf4c0420  P readable   P unreadable
libc                   0xea38fff04d0  P readable   P unreadable