==== 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                  0x8fdf2ef5640  P readable   P unreadable
mmap xz                0x8fe56b5c000  P unreadable P unreadable
mmap x                 0x8fe348f1000  P readable   P readable  
mmap nrx               0x8fe1c969000  P readable   P readable  
mmap nwx               0x8fe33561000  P readable   P readable  
mmap xnwx              0x8fe464dd000  P readable   P readable  
main                   0x8fba50e9410  P readable   P unreadable
libc                   0x8fe26870da0  P readable   P unreadable