==== 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                  0x7b39a326a10  P readable   P unreadable
mmap xz                0x7b403114000  P unreadable P unreadable
mmap x                 0x7b428b37000  P readable   P readable  
mmap nrx               0x7b3e2f3b000  P readable   P readable  
mmap nwx               0x7b3df452000  P readable   P readable  
mmap xnwx              0x7b3daac9000  P readable   P readable  
main                   0x7b1986f5410  P readable   P unreadable
libc                   0x7b4778a0670  P readable   P unreadable