==== run-regress-xonly ====
cc -O2 -pipe  -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                  0x3d73c2e8410  P readable   P unreadable
mmap xz                0x3d728cdc000  P unreadable P unreadable
mmap x                 0x3d714b31000  P readable   P readable  
mmap nrx               0x3d6ee549000  P readable   P readable  
mmap nwx               0x3d6ca93a000  P readable   P readable  
mmap xnwx              0x3d6f2fa1000  P readable   P readable  
main                   0x3d4423f8430  P readable   P unreadable
libc                   0x3d6e948f9e0  P readable   P unreadable