==== 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                  0xc9b40dce280  P readable   P unreadable
mmap xz                0xc9afd221000  P unreadable P unreadable
mmap x                 0xc9b682e4000  P readable   P readable  
mmap nrx               0xc9b9ab82000  P readable   P readable  
mmap nwx               0xc9b0c70c000  P readable   P readable  
mmap xnwx              0xc9b10207000  P readable   P readable  
main                   0xc98fa6d6420  P readable   P unreadable
libc                   0xc9b9ffc6330  P readable   P unreadable