==== 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                  0xc736d1adf30  P readable   P unreadable
mmap xz                0xc742e6ff000  P unreadable P unreadable
mmap x                 0xc73bca58000  P readable   P readable  
mmap nrx               0xc73eabc7000  P readable   P readable  
mmap nwx               0xc7378e46000  P readable   P readable  
mmap xnwx              0xc7401e69000  P readable   P readable  
main                   0xc713d8ab410  P readable   P unreadable
libc                   0xc73430c6c80  P readable   P unreadable