==== 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                  0x3b0c5bebf20  P readable   P unreadable
mmap xz                0x3b0cbe6a000  P unreadable P unreadable
mmap x                 0x3b0cf66f000  P readable   P readable  
mmap nrx               0x3b0b5d65000  P readable   P readable  
mmap nwx               0x3b0bd26f000  P readable   P readable  
mmap xnwx              0x3b069a26000  P readable   P readable  
main                   0x3ae19c0b420  P readable   P unreadable
libc                   0x3b084c5ed30  P readable   P unreadable