==== 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                  0xbab723d7350  P readable   P unreadable
mmap xz                0xbab761de000  P unreadable P unreadable
mmap x                 0xbaadbee0000  P readable   P readable  
mmap nrx               0xbab937b6000  P readable   P readable  
mmap nwx               0xbaaaf87e000  P readable   P readable  
mmap xnwx              0xbaaca565000  P readable   P readable  
main                   0xba89d2d9430  P readable   P unreadable
libc                   0xbab8696c4f0  P readable   P unreadable