==== 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                  0x278315fa7e0  P readable   P unreadable
mmap xz                0x27822c74000  P unreadable P unreadable
mmap x                 0x2777e0e5000  P readable   P readable  
mmap nrx               0x2786179e000  P readable   P readable  
mmap nwx               0x2786ee1b000  P readable   P readable  
mmap xnwx              0x2781c538000  P readable   P readable  
main                   0x275794c9420  P readable   P unreadable
libc                   0x277b91b9240  P readable   P unreadable