makecontext and its arguments

[Andreas Schwab]

Andreas Jaeger <aj@suse.de> writes:

|> Implementing makecontext on x86-64 I noticed a problem with passing
|> its arguments.
|> 
|> The function is defined as:
|> void makecontext(ucontext_t *ucp, void (*func)(void),
|>       int argc, ...);
|> 
|> There's no way to determine the type of the arguments.
|> 
|> The Austin Draft (and also our manual) mentions:
|> 
|>     The application shall ensure that the value of argc matches the
|>     number of integer arguments passed to func; otherwise, the
|>     behavior is undefined.

IMHO this is a defect in the standard, because "integer" can mean
anything from char to long long and whatever extended integer type might
be defined.  It does not restrict the arguments to type "int".

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
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