==== 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                  0xa983b664bc0  P readable   P unreadable
mmap xz                0xa9880efa000  P unreadable P unreadable
mmap x                 0xa97a4ba7000  P readable   P readable  
mmap nrx               0xa9830bee000  P readable   P readable  
mmap nwx               0xa9830508000  P readable   P readable  
mmap xnwx              0xa9832e40000  P readable   P readable  
main                   0xa9594959430  P readable   P unreadable
libc                   0xa986e1ae0a0  P readable   P unreadable