==== 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                  0x4d99b266870  P readable   P unreadable
mmap xz                0x4d92d094000  P unreadable P unreadable
mmap x                 0x4d9ed2cc000  P readable   P readable  
mmap nrx               0x4d9c25a2000  P readable   P readable  
mmap nwx               0x4d9f6e4f000  P readable   P readable  
mmap xnwx              0x4d9965f9000  P readable   P readable  
main                   0x4d71a072420  P readable   P unreadable
libc                   0x4d9f73a6120  P readable   P unreadable