==== 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                   0xb309661710  P readable   P unreadable
mmap xz                 0xb3a83b4000  P unreadable P unreadable
mmap x                  0xb363446000  P readable   P readable  
mmap nrx                0xb39e8c2000  P readable   P readable  
mmap nwx                0xb2f3a15000  P readable   P readable  
mmap xnwx               0xb2f5138000  P readable   P readable  
main                    0xb0bc5e7410  P readable   P unreadable
libc                    0xb37b259ae0  P readable   P unreadable