==== 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                  0x76c05ab2a90  P readable   P unreadable
mmap xz                0x76c54df9000  P unreadable P unreadable
mmap x                 0x76bab528000  P readable   P readable  
mmap nrx               0x76b650cd000  P readable   P readable  
mmap nwx               0x76c3a203000  P readable   P readable  
mmap xnwx              0x76bc1a04000  P readable   P readable  
main                   0x7695e211420  P readable   P unreadable
libc                   0x76bbe8bf0a0  P readable   P unreadable