==== 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                  0xbd9518cde50  P readable   P unreadable
mmap xz                0xbd935508000  P unreadable P unreadable
mmap x                 0xbda23512000  P readable   P readable  
mmap nrx               0xbd9704e7000  P readable   P readable  
mmap nwx               0xbd956404000  P readable   P readable  
mmap xnwx              0xbd9b4433000  P readable   P readable  
main                   0xbd72a7e2410  P readable   P unreadable
libc                   0xbd9903677c0  P readable   P unreadable