==== run-regress-xonly ====
cc -O2 -pipe  -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                  0xf37b7630d10  P readable   P unreadable
mmap xz                0xf37f537a000  P unreadable P unreadable
mmap x                 0xf380c75c000  P readable   P readable  
mmap nrx               0xf38065ac000  P readable   P readable  
mmap nwx               0xf377d013000  P readable   P readable  
mmap xnwx              0xf37909ee000  P readable   P readable  
main                   0xf3531e90430  P readable   P unreadable
libc                   0xf37fbac78c0  P readable   P unreadable