==== 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                  0xdcc27200220  P readable   P unreadable
mmap xz                0xdcc1c2e0000  P unreadable P unreadable
mmap x                 0xdcc8fe5f000  P readable   P readable  
mmap nrx               0xdcbc5e1e000  P readable   P readable  
mmap nwx               0xdcbd5ab2000  P readable   P readable  
mmap xnwx              0xdcbce81b000  P readable   P readable  
main                   0xdc99eacb420  P readable   P unreadable
libc                   0xdcba268ec90  P readable   P unreadable