==== 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                  0x37a1b156d70  P readable   P unreadable
mmap xz                0x37a24924000  P unreadable P unreadable
mmap x                 0x37a24951000  P readable   P readable  
mmap nrx               0x37a7cb01000  P readable   P readable  
mmap nwx               0x37a96b54000  P readable   P readable  
mmap xnwx              0x37aa1e18000  P readable   P readable  
main                   0x377d41a3420  P readable   P unreadable
libc                   0x37a5df15750  P readable   P unreadable