==== 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                   0x3b483ebb50  P readable   P unreadable
mmap xz                 0x3b1c106000  P unreadable P unreadable
mmap x                  0x3a7f14f000  P readable   P readable  
mmap nrx                0x3b41518000  P readable   P readable  
mmap nwx                0x3aa6cd8000  P readable   P readable  
mmap xnwx               0x3af500c000  P readable   P readable  
main                    0x386fe4c420  P readable   P unreadable
libc                    0x3ad2ae7c80  P readable   P unreadable