==== 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                  0xae8aef3ae10  P readable   P unreadable
mmap xz                0xae92ff7f000  P unreadable P unreadable
mmap x                 0xae910f54000  P readable   P readable  
mmap nrx               0xae8d1a19000  P readable   P readable  
mmap nwx               0xae90442c000  P readable   P readable  
mmap xnwx              0xae949014000  P readable   P readable  
main                   0xae680efb430  P readable   P unreadable
libc                   0xae8cffa2980  P readable   P unreadable