==== 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                  0x3c7b83e7a00  P readable   P unreadable
mmap xz                0x3c7522da000  P unreadable P unreadable
mmap x                 0x3c728c18000  P readable   P readable  
mmap nrx               0x3c7b7928000  P readable   P readable  
mmap nwx               0x3c790dd9000  P readable   P readable  
mmap xnwx              0x3c7cd2c1000  P readable   P readable  
main                   0x3c51f736420  P readable   P unreadable
libc                   0x3c72c114010  P readable   P unreadable