==== 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                   0xf64ed84aa0  P readable   P unreadable
mmap xz                 0xf5dad35000  P unreadable P unreadable
mmap x                  0xf5f763d000  P readable   P readable  
mmap nrx                0xf651b20000  P readable   P readable  
mmap nwx                0xf59e9c2000  P readable   P readable  
mmap xnwx               0xf5f3c2e000  P readable   P readable  
main                    0xf35c469410  P readable   P unreadable
libc                    0xf60a877480  P readable   P unreadable