==== 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                  0xbd5da36a3f0  P readable   P unreadable
mmap xz                0xbd6bfa0e000  P unreadable P unreadable
mmap x                 0xbd67fd93000  P readable   P readable  
mmap nrx               0xbd67a045000  P readable   P readable  
mmap nwx               0xbd637e0b000  P readable   P readable  
mmap xnwx              0xbd60f816000  P readable   P readable  
main                   0xbd3d54e3410  P readable   P unreadable
libc                   0xbd62aa21e20  P readable   P unreadable