==== 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                  0xaee56e3b860  P readable   P unreadable
mmap xz                0xaedf7604000  P unreadable P unreadable
mmap x                 0xaee666e5000  P readable   P readable  
mmap nrx               0xaee4090d000  P readable   P readable  
mmap nwx               0xaee818c4000  P readable   P readable  
mmap xnwx              0xaee69dba000  P readable   P readable  
main                   0xaebb361b420  P readable   P unreadable
libc                   0xaeea544d000  P readable   P unreadable