==== 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                  0x5cb2ba39040  P readable   P unreadable
mmap xz                0x5cbdf1f6000  P unreadable P unreadable
mmap x                 0x5cb7f4b6000  P readable   P readable  
mmap nrx               0x5cb45652000  P readable   P readable  
mmap nwx               0x5cb207db000  P readable   P readable  
mmap xnwx              0x5cb22820000  P readable   P readable  
main                   0x5c91d1cc410  P readable   P unreadable
libc                   0x5cb80874950  P readable   P unreadable