==== 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                  0xe1183486920  P readable   P unreadable
mmap xz                0xe10e7cb8000  P unreadable P unreadable
mmap x                 0xe1177391000  P readable   P readable  
mmap nrx               0xe11258f3000  P readable   P readable  
mmap nwx               0xe113b71a000  P readable   P readable  
mmap xnwx              0xe11065e2000  P readable   P readable  
main                   0xe0e90fee410  P readable   P unreadable
libc                   0xe1160158670  P readable   P unreadable