==== 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                  0xe4b15b74f50  P readable   P unreadable
mmap xz                0xe4b21e2d000  P unreadable P unreadable
mmap x                 0xe4b450c8000  P readable   P readable  
mmap nrx               0xe4afb7be000  P readable   P readable  
mmap nwx               0xe4ba30cc000  P readable   P readable  
mmap xnwx              0xe4af070a000  P readable   P readable  
main                   0xe48e6686430  P readable   P unreadable
libc                   0xe4b0b4624a0  P readable   P unreadable