==== 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                  0x96c1218ee90  P readable   P unreadable
mmap xz                0x96c4c517000  P unreadable P unreadable
mmap x                 0x96b8922d000  P readable   P readable  
mmap nrx               0x96be6658000  P readable   P readable  
mmap nwx               0x96bc83eb000  P readable   P readable  
mmap xnwx              0x96c0113e000  P readable   P readable  
main                   0x9696239e410  P readable   P unreadable
libc                   0x96c14063e70  P readable   P unreadable