==== 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                  0xd66b76a4830  P readable   P unreadable
mmap xz                0xd65be57f000  P unreadable P unreadable
mmap x                 0xd665d631000  P readable   P readable  
mmap nrx               0xd66943f9000  P readable   P readable  
mmap nwx               0xd66ab7f2000  P readable   P readable  
mmap xnwx              0xd668b772000  P readable   P readable  
main                   0xd63bdba8420  P readable   P unreadable
libc                   0xd6631d98440  P readable   P unreadable