==== 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                  0x494fb1e5980  P readable   P unreadable
mmap xz                0x4955566d000  P unreadable P unreadable
mmap x                 0x494f80b2000  P readable   P readable  
mmap nrx               0x4949c372000  P readable   P readable  
mmap nwx               0x494b38a2000  P readable   P readable  
mmap xnwx              0x494eb91d000  P readable   P readable  
main                   0x4926e4a0420  P readable   P unreadable
libc                   0x494aa51f260  P readable   P unreadable