==== 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                  0x81947c166c0  P readable   P unreadable
mmap xz                0x819bb5df000  P unreadable P unreadable
mmap x                 0x81980adb000  P readable   P readable  
mmap nrx               0x819bba8c000  P readable   P readable  
mmap nwx               0x81909d91000  P readable   P readable  
mmap xnwx              0x819252c3000  P readable   P readable  
main                   0x816bcb42410  P readable   P unreadable
libc                   0x818d4f2c160  P readable   P unreadable