==== 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                  0xc7adee49150  P readable   P unreadable
mmap xz                0xc7a87e89000  P unreadable P unreadable
mmap x                 0xc7b0dbd1000  P readable   P readable  
mmap nrx               0xc7b41bee000  P readable   P readable  
mmap nwx               0xc7a75a0f000  P readable   P readable  
mmap xnwx              0xc7a9e8e7000  P readable   P readable  
main                   0xc7860a92420  P readable   P unreadable
libc                   0xc7ad8ca4e40  P readable   P unreadable