==== 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                  0x819539360a0  P readable   P unreadable
mmap xz                0x81946350000  P unreadable P unreadable
mmap x                 0x818f25d3000  P readable   P readable  
mmap nrx               0x81874a94000  P readable   P readable  
mmap nwx               0x818ab023000  P readable   P readable  
mmap xnwx              0x81910a0f000  P readable   P readable  
main                   0x816675e7430  P readable   P unreadable
libc                   0x81946affa20  P readable   P unreadable