==== 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                   0x2153cf6db0  P readable   P unreadable
mmap xz                 0x220675e000  P unreadable P unreadable
mmap x                  0x22099e5000  P readable   P readable  
mmap nrx                0x2244d49000  P readable   P readable  
mmap nwx                0x21d1972000  P readable   P readable  
mmap xnwx               0x2191952000  P readable   P readable  
main                    0x1f4d300420  P readable   P unreadable
libc                    0x21f3d15100  P readable   P unreadable