==== 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                  0x8a4a9617f10  P readable   P unreadable
mmap xz                0x8a495470000  P unreadable P unreadable
mmap x                 0x8a4838d1000  P readable   P readable  
mmap nrx               0x8a518391000  P readable   P readable  
mmap nwx               0x8a4bb630000  P readable   P readable  
mmap xnwx              0x8a537640000  P readable   P readable  
main                   0x8a255f8d430  P readable   P unreadable
libc                   0x8a4968757c0  P readable   P unreadable