[Resending, this time CC:'d to GCC list.] I'm looking at Section 3.2.3, Parameter Passing. http://artfiles.org/kernel.org/pub/scm/devel/binutils/hjl/x86-64-psabi.git/
I still cannot tell whether parameters should or should not be sign- or zero-extended when they are moved into registers at a call. I'm guessing not. Which is it? This is important for interworking. Thanks, Andrew.
