==== 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                  0x76e9137f400  P readable   P unreadable
mmap xz                0x76eef9c7000  P unreadable P unreadable
mmap x                 0x76f13b32000  P readable   P readable  
mmap nrx               0x76effc8d000  P readable   P readable  
mmap nwx               0x76ec9c1a000  P readable   P readable  
mmap xnwx              0x76e44aba000  P readable   P readable  
main                   0x76c445de420  P readable   P unreadable
libc                   0x76e90e0a5b0  P readable   P unreadable