==== 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                  0xc2edf297fa0  P readable   P unreadable
mmap xz                0xc2f9ab0b000  P unreadable P unreadable
mmap x                 0xc2f53570000  P readable   P readable  
mmap nrx               0xc2f99c07000  P readable   P readable  
mmap nwx               0xc2f181dc000  P readable   P readable  
mmap xnwx              0xc2ef5894000  P readable   P readable  
main                   0xc2cc4935420  P readable   P unreadable
libc                   0xc2f1c217d30  P readable   P unreadable