==== 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                  0xfdfb57203a0  P readable   P unreadable
mmap xz                0xfdffe787000  P unreadable P unreadable
mmap x                 0xfe0326a0000  P readable   P readable  
mmap nrx               0xfe0207c0000  P readable   P readable  
mmap nwx               0xfe02d1c3000  P readable   P readable  
mmap xnwx              0xfdfbd176000  P readable   P readable  
main                   0xfdda2c01410  P readable   P unreadable
libc                   0xfe0241d7e30  P readable   P unreadable