==== 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                  0x94e842a05e0  P readable   P unreadable
mmap xz                0x94e187ff000  P unreadable P unreadable
mmap x                 0x94e45f58000  P readable   P readable  
mmap nrx               0x94e98b36000  P readable   P readable  
mmap nwx               0x94ed7c52000  P readable   P readable  
mmap xnwx              0x94e68b15000  P readable   P readable  
main                   0x94be3d6b420  P readable   P unreadable
libc                   0x94e6df710e0  P readable   P unreadable