==== 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                  0x72ed4aa1ab0  P readable   P unreadable
mmap xz                0x72e25cf1000  P unreadable P unreadable
mmap x                 0x72e2a81f000  P readable   P readable  
mmap nrx               0x72e745a9000  P readable   P readable  
mmap nwx               0x72ead31b000  P readable   P readable  
mmap xnwx              0x72e5ea90000  P readable   P readable  
main                   0x72be0f70410  P readable   P unreadable
libc                   0x72df4faf090  P readable   P unreadable