==== 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                  0x3b21f87d210  P readable   P unreadable
mmap xz                0x3b2888de000  P unreadable P unreadable
mmap x                 0x3b1da784000  P readable   P readable  
mmap nrx               0x3b1b4622000  P readable   P readable  
mmap nwx               0x3b196bff000  P readable   P readable  
mmap xnwx              0x3b1ddfd4000  P readable   P readable  
main                   0x3af90c17420  P readable   P unreadable
libc                   0x3b23ab70ec0  P readable   P unreadable