==== 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                    0xa59453000  P readable   P unreadable
mmap xz                  0xa3c0d0000  P unreadable P unreadable
mmap x                   0xa6dad7000  P readable   P readable  
mmap nrx                 0x9aefb5000  P readable   P readable  
mmap nwx                 0xa46927000  P readable   P readable  
mmap xnwx                0x9d53d3000  P readable   P readable  
main                     0x7a5b0d420  P readable   P unreadable
libc                     0xa25962530  P readable   P unreadable