==== 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                  0xfb6fcdfc2b0  P readable   P unreadable
mmap xz                0xfb7885bb000  P unreadable P unreadable
mmap x                 0xfb79e98f000  P readable   P readable  
mmap nrx               0xfb70dc04000  P readable   P readable  
mmap nwx               0xfb6c694d000  P readable   P readable  
mmap xnwx              0xfb795361000  P readable   P readable  
main                   0xfb4c37a1410  P readable   P unreadable
libc                   0xfb6c6066870  P readable   P unreadable