==== 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                  0x2c51140b320  P readable   P unreadable
mmap xz                0x2c42e50e000  P unreadable P unreadable
mmap x                 0x2c4e623e000  P readable   P readable  
mmap nrx               0x2c43ca0b000  P readable   P readable  
mmap nwx               0x2c4eb571000  P readable   P readable  
mmap xnwx              0x2c52623b000  P readable   P readable  
main                   0x2c22d566410  P readable   P unreadable
libc                   0x2c4e100dbc0  P readable   P unreadable