==== 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                  0xf0ba758b560  P readable   P unreadable
mmap xz                0xf0b12d5f000  P unreadable P unreadable
mmap x                 0xf0b39bc9000  P readable   P readable  
mmap nrx               0xf0b608ff000  P readable   P readable  
mmap nwx               0xf0b927e3000  P readable   P readable  
mmap xnwx              0xf0bb9bf6000  P readable   P readable  
main                   0xf090fa3e420  P readable   P unreadable
libc                   0xf0b4ecca430  P readable   P unreadable