==== 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                  0xa1d2f919c80  P readable   P unreadable
mmap xz                0xa1d53abe000  P unreadable P unreadable
mmap x                 0xa1d4368a000  P readable   P readable  
mmap nrx               0xa1d6de73000  P readable   P readable  
mmap nwx               0xa1d55e9e000  P readable   P readable  
mmap xnwx              0xa1d63780000  P readable   P readable  
main                   0xa1a85964430  P readable   P unreadable
libc                   0xa1d665bcea0  P readable   P unreadable