makecontext and its arguments

[Ulrich Drepper]

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Andreas Schwab wrote:

> This is the crux of the problem.  makecontext talks about "integer
> arguments", and __int128 is an integer type.  So it is obliged to handle
> this.

This is a completely bogus argument.  Every platform could define 
int1024_t or whatever.  These don't count.  At the time the interface 
was introduced only char, short, int, and long were available.  Nothing 
else can be expected to work.  The method described earlier works 
perfectly for this and the proposed attribute has the potential to help 
many more applications which would suffer from this broken calling 
convention.


> This is not what the specification says.

It says so implicitly.  Whatever is not explicitly specified is 
implicitly left undefined.  And undefined means garbage is allowed.  And 
this is what happens on most platforms.

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