==== 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                  0x7590606c7e0  P readable   P unreadable
mmap xz                0x7584586b000  P unreadable P unreadable
mmap x                 0x75859d8a000  P readable   P readable  
mmap nrx               0x7585bf96000  P readable   P readable  
mmap nwx               0x758ca8bc000  P readable   P readable  
mmap xnwx              0x758b3020000  P readable   P readable  
main                   0x7561c1e6430  P readable   P unreadable
libc                   0x758a658c030  P readable   P unreadable