==== 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                  0x6fcfe3b4590  P readable   P unreadable
mmap xz                0x6fcb4a7f000  P unreadable P unreadable
mmap x                 0x6fd3a3a4000  P readable   P readable  
mmap nrx               0x6fc47a4f000  P readable   P readable  
mmap nwx               0x6fcc2615000  P readable   P readable  
mmap xnwx              0x6fc3d2d2000  P readable   P readable  
main                   0x6fa3c0ca420  P readable   P unreadable
libc                   0x6fc492eef70  P readable   P unreadable