==== 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                  0xb84603a2900  P readable   P unreadable
mmap xz                0xb84cf375000  P unreadable P unreadable
mmap x                 0xb849b1c6000  P readable   P readable  
mmap nrx               0xb84a0e3b000  P readable   P readable  
mmap nwx               0xb84a0d8c000  P readable   P readable  
mmap xnwx              0xb84e31e9000  P readable   P readable  
main                   0xb81e539b420  P readable   P unreadable
libc                   0xb84a5c00170  P readable   P unreadable