==== run-callstack ====
# Use invalid stack pointer, syscall, SIGSEGV handler, check -M flag.
cp -f callstack regress-callstack
./regress-callstack
*** Signal SIGSEGV in . (Makefile:60 'run-callstack')
EXPECTED_FAIL

==== run-syscallwx ====
# Use writable syscall code, run SIGSEGV handler, check -M flag.
cp -f syscallwx regress-syscallwx
./regress-syscallwx
*** Signal SIGABRT in . (Makefile:67 'run-syscallwx')
EXPECTED_FAIL