==== 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                  0xb709750e560  P readable   P unreadable
mmap xz                0xb70ac4cd000  P unreadable P unreadable
mmap x                 0xb70dcffb000  P readable   P readable  
mmap nrx               0xb710a27f000  P readable   P readable  
mmap nwx               0xb708cd8c000  P readable   P readable  
mmap xnwx              0xb711f7f3000  P readable   P readable  
main                   0xb6e5e04c430  P readable   P unreadable
libc                   0xb7081f92dc0  P readable   P unreadable