==== 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                  0x95e63b747a0  P readable   P unreadable
mmap xz                0x95da1b15000  P unreadable P unreadable
mmap x                 0x95e14ede000  P readable   P readable  
mmap nrx               0x95e4be58000  P readable   P readable  
mmap nwx               0x95da5ae1000  P readable   P readable  
mmap xnwx              0x95dc4b11000  P readable   P readable  
main                   0x95b71563420  P readable   P unreadable
libc                   0x95d85ce4270  P readable   P unreadable