==== 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                  0xfe7fd2cc690  P readable   P unreadable
mmap xz                0xfe7eebc1000  P unreadable P unreadable
mmap x                 0xfe81d0ba000  P readable   P readable  
mmap nrx               0xfe81b6b6000  P readable   P readable  
mmap nwx               0xfe7f9d19000  P readable   P readable  
mmap xnwx              0xfe7c49aa000  P readable   P readable  
main                   0xfe57a7a0420  P readable   P unreadable
libc                   0xfe8259bc6c0  P readable   P unreadable