==== 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                  0x194647b57b0  P readable   P unreadable
mmap xz                0x19530e48000  P unreadable P unreadable
mmap x                 0x19496c0c000  P readable   P readable  
mmap nrx               0x1947a499000  P readable   P readable  
mmap nwx               0x1951064e000  P readable   P readable  
mmap xnwx              0x194bdd51000  P readable   P readable  
main                   0x1924d8aa420  P readable   P unreadable
libc                   0x194dbc255d0  P readable   P unreadable