==== 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                  0xdd948671280  P readable   P unreadable
mmap xz                0xdd94c852000  P unreadable P unreadable
mmap x                 0xdd923235000  P readable   P readable  
mmap nrx               0xdd8ab564000  P readable   P readable  
mmap nwx               0xdd8a557e000  P readable   P readable  
mmap xnwx              0xdd8b22b0000  P readable   P readable  
main                   0xdd65f94f420  P readable   P unreadable
libc                   0xdd918ef2330  P readable   P unreadable