==== 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                  0xb580f5f26d0  P readable   P unreadable
mmap xz                0xb58169b0000  P unreadable P unreadable
mmap x                 0xb57d16a5000  P readable   P readable  
mmap nrx               0xb57f3be9000  P readable   P readable  
mmap nwx               0xb57898ca000  P readable   P readable  
mmap xnwx              0xb57e5f54000  P readable   P readable  
main                   0xb5556d29420  P readable   P unreadable
libc                   0xb57b0d75d60  P readable   P unreadable