==== run-regress-dump_tables ====
sed -nE -e '/^struct[[:space:]]+pmap[[:space:]]*\{/,/^}/p'  -e '/^[[:space:]]*#[[:space:]]*define[[:space:]]+PMAP_DIRECT_(UN)?MAP\(/p'  /usr/include/machine/pmap.h >struct_pmap.h
cc -I. -g  -MD -MP  -c /home/src/regress/sys/arch/amd64/dump_tables/dump_tables.c
cc   -o dump_tables dump_tables.o -lkvm
doas -n ./dump_tables >tables