==== 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                  0x8a734233360  P readable   P unreadable
mmap xz                0x8a779a1f000  P unreadable P unreadable
mmap x                 0x8a770a15000  P readable   P readable  
mmap nrx               0x8a753f35000  P readable   P readable  
mmap nwx               0x8a6ab37e000  P readable   P readable  
mmap xnwx              0x8a6b4419000  P readable   P readable  
main                   0x8a4a4b7c430  P readable   P unreadable
libc                   0x8a6b6b5cef0  P readable   P unreadable