==== 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                  0xc07754244a0  P readable   P unreadable
mmap xz                0xc078bc22000  P unreadable P unreadable
mmap x                 0xc078ed1c000  P readable   P readable  
mmap nrx               0xc071fb4e000  P readable   P readable  
mmap nwx               0xc070f640000  P readable   P readable  
mmap xnwx              0xc07a535d000  P readable   P readable  
main                   0xc0507d12420  P readable   P unreadable
libc                   0xc07a1dae530  P readable   P unreadable