gcc and struct passing in function arguments?

[Michael Meissner]

On Wed, Jul 05, 2000 at 04:08:35PM -0400, David Young wrote:
> Hi!
> 
> Does anyone know if...
> 
> gcc can do struct passing in arguments and return of functions?
> (not pointer to struct, but struct by value)
> Is there a 32 byte limit (or similar) to this?
> Is this feature ANSI-C compliant?

It depends on the ABI.  Different ABI's do different things.  For example,
powerpc-eabi or powerpc-linux always passes structures by copying the structure
to a temporary location on the stack and passing the address of the temporary.
For AIX, the first 8 words of integral and structure arguments are passed in
registers and the remaining elements are passed on the stack.

-- 
Michael Meissner, Red Hat, Inc.
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