==== 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                  0xe24056c6260  P readable   P unreadable
mmap xz                0xe23af2ed000  P unreadable P unreadable
mmap x                 0xe2471a19000  P readable   P readable  
mmap nrx               0xe245bfcb000  P readable   P readable  
mmap nwx               0xe23d3972000  P readable   P readable  
mmap xnwx              0xe23ec10d000  P readable   P readable  
main                   0xe21732fb410  P readable   P unreadable
libc                   0xe23e9cf49b0  P readable   P unreadable