==== 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                  0xa5107fc2e30  P readable   P unreadable
mmap xz                0xa51185ec000  P unreadable P unreadable
mmap x                 0xa50d8a14000  P readable   P readable  
mmap nrx               0xa512e518000  P readable   P readable  
mmap nwx               0xa50e4974000  P readable   P readable  
mmap xnwx              0xa50ac2bb000  P readable   P readable  
main                   0xa4e3fa24410  P readable   P unreadable
libc                   0xa50df2c1c50  P readable   P unreadable