==== 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                  0xb9e86a48f40  P readable   P unreadable
mmap xz                0xb9ec2602000  P unreadable P unreadable
mmap x                 0xb9e55d67000  P readable   P readable  
mmap nrx               0xb9e60d96000  P readable   P readable  
mmap nwx               0xb9ea34a9000  P readable   P readable  
mmap xnwx              0xb9e4788c000  P readable   P readable  
main                   0xb9c2eb1b430  P readable   P unreadable
libc                   0xb9ef2c317a0  P readable   P unreadable