==== 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                  0x4b857b65100  P readable   P unreadable
mmap xz                0x4b7f9f4b000  P unreadable P unreadable
mmap x                 0x4b84be0b000  P readable   P readable  
mmap nrx               0x4b85b4e3000  P readable   P readable  
mmap nwx               0x4b7d9296000  P readable   P readable  
mmap xnwx              0x4b888336000  P readable   P readable  
main                   0x4b59829d430  P readable   P unreadable
libc                   0x4b7a0af5840  P readable   P unreadable