==== 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                  0xe0104852910  P readable   P unreadable
mmap xz                0xe013ba9d000  P unreadable P unreadable
mmap x                 0xe01228cf000  P readable   P readable  
mmap nrx               0xe00f5e07000  P readable   P readable  
mmap nwx               0xe01af5ba000  P readable   P readable  
mmap xnwx              0xe018c624000  P readable   P readable  
main                   0xdfef2a57420  P readable   P unreadable
libc                   0xe0185251ab0  P readable   P unreadable