==== 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                  0xa22130a6680  P readable   P unreadable
mmap xz                0xa2262735000  P unreadable P unreadable
mmap x                 0xa21f9e21000  P readable   P readable  
mmap nrx               0xa21fba1a000  P readable   P readable  
mmap nwx               0xa2219284000  P readable   P readable  
mmap xnwx              0xa21bdc36000  P readable   P readable  
main                   0xa1f7a490420  P readable   P unreadable
libc                   0xa223141ab70  P readable   P unreadable