==== 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                  0xa5ed30aba00  P readable   P unreadable
mmap xz                0xa5f0b5b8000  P unreadable P unreadable
mmap x                 0xa5e384b9000  P readable   P readable  
mmap nrx               0xa5e310c4000  P readable   P readable  
mmap nwx               0xa5eb720c000  P readable   P readable  
mmap xnwx              0xa5eaccff000  P readable   P readable  
main                   0xa5c208a5420  P readable   P unreadable
libc                   0xa5e2c7c9dc0  P readable   P unreadable