==== 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                  0x48e5604cdb0  P readable   P unreadable
mmap xz                0x48df1bd7000  P unreadable P unreadable
mmap x                 0x48e181d9000  P readable   P readable  
mmap nrx               0x48e3c4d7000  P readable   P readable  
mmap nwx               0x48e2f1e2000  P readable   P readable  
mmap xnwx              0x48e69b8c000  P readable   P readable  
main                   0x48be4be6420  P readable   P unreadable
libc                   0x48e746cac20  P readable   P unreadable