==== 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                  0x4faef732950  P readable   P unreadable
mmap xz                0x4fb0b20f000  P unreadable P unreadable
mmap x                 0x4fa3290d000  P readable   P readable  
mmap nrx               0x4fac658b000  P readable   P readable  
mmap nwx               0x4fa4ec4d000  P readable   P readable  
mmap xnwx              0x4fac9047000  P readable   P readable  
main                   0x4f8148ba420  P readable   P unreadable
libc                   0x4faa4f72850  P readable   P unreadable