==== 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                  0x7b03fedf950  P readable   P unreadable
mmap xz                0x7afebb7e000  P unreadable P unreadable
mmap x                 0x7afe82b8000  P readable   P readable  
mmap nrx               0x7af85011000  P readable   P readable  
mmap nwx               0x7b0337f7000  P readable   P readable  
mmap xnwx              0x7af749c6000  P readable   P readable  
main                   0x7ad59bb3430  P readable   P unreadable
libc                   0x7b0555ce720  P readable   P unreadable