==== 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                  0xf352e0f00b0  P readable   P unreadable
mmap xz                0xf35a24bb000  P unreadable P unreadable
mmap x                 0xf3573fc8000  P readable   P readable  
mmap nrx               0xf35520a1000  P readable   P readable  
mmap nwx               0xf359ade2000  P readable   P readable  
mmap xnwx              0xf3567e25000  P readable   P readable  
main                   0xf3324bf6410  P readable   P unreadable
libc                   0xf3549b35410  P readable   P unreadable