==== 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                  0xe4ace60b470  P readable   P unreadable
mmap xz                0xe4a4023b000  P unreadable P unreadable
mmap x                 0xe4a43760000  P readable   P readable  
mmap nrx               0xe4acfd3e000  P readable   P readable  
mmap nwx               0xe4b0df8e000  P readable   P readable  
mmap xnwx              0xe4a4ad93000  P readable   P readable  
main                   0xe4838854420  P readable   P unreadable
libc                   0xe4af1804b50  P readable   P unreadable