==== 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                   0x7184b1bbc0  P readable   P unreadable
mmap xz                 0x7132b9c000  P unreadable P unreadable
mmap x                  0x7115794000  P readable   P readable  
mmap nrx                0x710ebe3000  P readable   P readable  
mmap nwx                0x70fde4f000  P readable   P readable  
mmap xnwx               0x714149e000  P readable   P readable  
main                    0x6ef8e62420  P readable   P unreadable
libc                    0x7179c8ce00  P readable   P unreadable