==== 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                  0xfa1e8186b30  P readable   P unreadable
mmap xz                0xfa11360e000  P unreadable P unreadable
mmap x                 0xfa16e870000  P readable   P readable  
mmap nrx               0xfa1a50d7000  P readable   P readable  
mmap nwx               0xfa182740000  P readable   P readable  
mmap xnwx              0xfa181b70000  P readable   P readable  
main                   0xf9f0b9ee420  P readable   P unreadable
libc                   0xfa17fc91d50  P readable   P unreadable