==== 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                  0xa25c0785b70  P readable   P unreadable
mmap xz                0xa2671339000  P unreadable P unreadable
mmap x                 0xa25fa2ef000  P readable   P readable  
mmap nrx               0xa26356a9000  P readable   P readable  
mmap nwx               0xa261a20f000  P readable   P readable  
mmap xnwx              0xa265c0e5000  P readable   P readable  
main                   0xa238f3e4430  P readable   P unreadable
libc                   0xa25f6cafbd0  P readable   P unreadable