==== run-regress-xonly ====
cc -O2 -pipe  -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                  0x10eb12dc520  P readable   P unreadable
mmap xz                0x10f1dd69000  P unreadable P unreadable
mmap x                 0x10f196c5000  P readable   P readable  
mmap nrx               0x10f56b67000  P readable   P readable  
mmap nwx               0x10eaceee000  P readable   P readable  
mmap xnwx              0x10eb03e9000  P readable   P readable  
main                   0x10c9e761430  P readable   P unreadable
libc                   0x10f55739d70  P readable   P unreadable