==== 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                  0x1283efa9350  P readable   P unreadable
mmap xz                0x128f72c2000  P unreadable P unreadable
mmap x                 0x1280cc0d000  P readable   P readable  
mmap nrx               0x1281b006000  P readable   P readable  
mmap nwx               0x128dcfb3000  P readable   P readable  
mmap xnwx              0x128f2066000  P readable   P readable  
main                   0x125f8f77420  P readable   P unreadable
libc                   0x12857763b30  P readable   P unreadable