==== 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                  0xf420a4e81f0  P readable   P unreadable
mmap xz                0xf41822b1000  P unreadable P unreadable
mmap x                 0xf41c1797000  P readable   P readable  
mmap nrx               0xf41ef7b7000  P readable   P readable  
mmap nwx               0xf419e51f000  P readable   P readable  
mmap xnwx              0xf415cbc7000  P readable   P readable  
main                   0xf3f53670420  P readable   P unreadable
libc                   0xf41efaa3270  P readable   P unreadable