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Re: makecontext and its arguments

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Andreas Schwab wrote:

Jakub Jelinek <jakub@redhat.com> writes:

|> On Mon, Aug 05, 2002 at 10:29:55PM +0200, Andreas Schwab wrote:
|> > |> Adding __attribute__((sane_x86_64_varargs)) to makecontext and make gcc
|> > |> promote all varargs into DImode when calling vararg functions with
|> > |> this attribute?
[...]
How does that help in any way?  If you pass an unsigned int to
makecontext it is not supposed to be signed extended, but zero extended
when assigned to long.  There is no way for va_arg to know that.
What part of "function attribute" do you not understand?

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