==== 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                  0x12b4e81ca90  P readable   P unreadable
mmap xz                0x12b28912000  P unreadable P unreadable
mmap x                 0x12ac649e000  P readable   P readable  
mmap nrx               0x12ae4ea9000  P readable   P readable  
mmap nwx               0x12ab532b000  P readable   P readable  
mmap xnwx              0x12b41574000  P readable   P readable  
main                   0x12859b0a420  P readable   P unreadable
libc                   0x12ab9c957b0  P readable   P unreadable