==== 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                  0x24244345ce0  P readable   P unreadable
mmap xz                0x2421d4b4000  P unreadable P unreadable
mmap x                 0x24207c14000  P readable   P readable  
mmap nrx               0x2428024d000  P readable   P readable  
mmap nwx               0x24225a72000  P readable   P readable  
mmap xnwx              0x241df7d2000  P readable   P readable  
main                   0x23f9ab3e410  P readable   P unreadable
libc                   0x24291623bd0  P readable   P unreadable