==== 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                   0x2bd9d0a930  P readable   P unreadable
mmap xz                 0x2c1e624000  P unreadable P unreadable
mmap x                  0x2c0df41000  P readable   P readable  
mmap nrx                0x2c2c293000  P readable   P readable  
mmap nwx                0x2bc3ab3000  P readable   P readable  
mmap xnwx               0x2bbc3a4000  P readable   P readable  
main                    0x2998620420  P readable   P unreadable
libc                    0x2c056a20e0  P readable   P unreadable