==== 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                  0x75228a44230  P readable   P unreadable
mmap xz                0x751dbe02000  P unreadable P unreadable
mmap x                 0x752965e8000  P readable   P readable  
mmap nrx               0x7524f16f000  P readable   P readable  
mmap nwx               0x751d5f72000  P readable   P readable  
mmap xnwx              0x752490ac000  P readable   P readable  
main                   0x74fb2f3e410  P readable   P unreadable
libc                   0x75284572ef0  P readable   P unreadable