==== 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                  0xf7cd2aa2b60  P readable   P unreadable
mmap xz                0xf7d0332c000  P unreadable P unreadable
mmap x                 0xf7d02396000  P readable   P readable  
mmap nrx               0xf7d1156d000  P readable   P readable  
mmap nwx               0xf7cd97c2000  P readable   P readable  
mmap xnwx              0xf7c7f841000  P readable   P readable  
main                   0xf7a3b015420  P readable   P unreadable
libc                   0xf7c4b6bfb50  P readable   P unreadable