==== 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                  0x7e4af1686c0  P readable   P unreadable
mmap xz                0x7e44844c000  P unreadable P unreadable
mmap x                 0x7e442694000  P readable   P readable  
mmap nrx               0x7e4d8a54000  P readable   P readable  
mmap nwx               0x7e4dc5cc000  P readable   P readable  
mmap xnwx              0x7e3e50a9000  P readable   P readable  
main                   0x7e1dce19410  P readable   P unreadable
libc                   0x7e3f427e640  P readable   P unreadable