==== 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                  0xe020a8451e0  P readable   P unreadable
mmap xz                0xe0168a35000  P unreadable P unreadable
mmap x                 0xe01946ff000  P readable   P readable  
mmap nrx               0xe013e5cd000  P readable   P readable  
mmap nwx               0xe016f3ba000  P readable   P readable  
mmap xnwx              0xe0201670000  P readable   P readable  
main                   0xdff30fc4420  P readable   P unreadable
libc                   0xe0180bf0570  P readable   P unreadable