==== 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                   0xf5490ed480  P readable   P unreadable
mmap xz                 0xf49f1b8000  P unreadable P unreadable
mmap x                  0xf4ecbeb000  P readable   P readable  
mmap nrx                0xf4c03fb000  P readable   P readable  
mmap nwx                0xf540542000  P readable   P readable  
mmap xnwx               0xf526bb2000  P readable   P readable  
main                    0xf29021a420  P readable   P unreadable
libc                    0xf4e140c540  P readable   P unreadable