==== 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                  0xf4de7ccce70  P readable   P unreadable
mmap xz                0xf4e99b2a000  P unreadable P unreadable
mmap x                 0xf4e828aa000  P readable   P readable  
mmap nrx               0xf4eacb1b000  P readable   P readable  
mmap nwx               0xf4e183c8000  P readable   P readable  
mmap xnwx              0xf4e1ac44000  P readable   P readable  
main                   0xf4bd09a3420  P readable   P unreadable
libc                   0xf4e8b779590  P readable   P unreadable