==== 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                  0x88b84b9cba0  P readable   P unreadable
mmap xz                0x88b2beff000  P unreadable P unreadable
mmap x                 0x88af1f57000  P readable   P readable  
mmap nrx               0x88adb5bf000  P readable   P readable  
mmap nwx               0x88b88b4a000  P readable   P readable  
mmap xnwx              0x88aa0d01000  P readable   P readable  
main                   0x8889cf31410  P readable   P unreadable
libc                   0x88ade6ca170  P readable   P unreadable