==== run-regress-xonly ====
cc -O2 -pipe  -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                  0xd40a1ff36b0  P readable   P unreadable
mmap xz                0xd414fea8000  P unreadable P unreadable
mmap x                 0xd406a290000  P readable   P readable  
mmap nrx               0xd41074c7000  P readable   P readable  
mmap nwx               0xd406fea3000  P readable   P readable  
mmap xnwx              0xd4146b78000  P readable   P readable  
main                   0xd3e60f5e430  P readable   P unreadable
libc                   0xd407ed07240  P readable   P unreadable