==== 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                  0x9aa6aca8410  P readable   P unreadable
mmap xz                0x9aabbd0b000  P unreadable P unreadable
mmap x                 0x9aa76f98000  P readable   P readable  
mmap nrx               0x9aac6381000  P readable   P readable  
mmap nwx               0x9aab8c7b000  P readable   P readable  
mmap xnwx              0x9ab33b92000  P readable   P readable  
main                   0x9a84f4e9420  P readable   P unreadable
libc                   0x9ab30baaa00  P readable   P unreadable