==== 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                  0x6ea3e77b680  P readable   P unreadable
mmap xz                0x6e9b939c000  P unreadable P unreadable
mmap x                 0x6e9e6536000  P readable   P readable  
mmap nrx               0x6e9c97a6000  P readable   P readable  
mmap nwx               0x6ea17c00000  P readable   P readable  
mmap xnwx              0x6ea7cabf000  P readable   P readable  
main                   0x6e799821430  P readable   P unreadable
libc                   0x6ea13ce4ae0  P readable   P unreadable