==== 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                  0xc2ed11f92b0  P readable   P unreadable
mmap xz                0xc2e39ed8000  P unreadable P unreadable
mmap x                 0xc2ecb3fe000  P readable   P readable  
mmap nrx               0xc2e44df8000  P readable   P readable  
mmap nwx               0xc2ed1994000  P readable   P readable  
mmap xnwx              0xc2e0cdb5000  P readable   P readable  
main                   0xc2bd4398410  P readable   P unreadable
libc                   0xc2e88a3bfa0  P readable   P unreadable