==== 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                  0xeb62efb8520  P readable   P unreadable
mmap xz                0xeb63fca1000  P unreadable P unreadable
mmap x                 0xeb5b2f10000  P readable   P readable  
mmap nrx               0xeb684023000  P readable   P readable  
mmap nwx               0xeb5de592000  P readable   P readable  
mmap xnwx              0xeb68fee4000  P readable   P readable  
main                   0xeb3aca77420  P readable   P unreadable
libc                   0xeb66cd153b0  P readable   P unreadable