On 21/06/17 09:46, Richard Earnshaw (lists) wrote: > On 21/06/17 09:44, Andreas Schwab wrote: >> On Jun 21 2017, "Richard Earnshaw (lists)" <richard.earns...@arm.com> wrote: >> >>> A mere 256 bytes for the caller would permit 32 x 8byte arguments on the >>> stack which, with at least 8 parameters passed in registers, would allow >>> for calls with 40 parameters. There can't be many in that space. Any >>> function making calls with more than that might need additional probes, >>> but that's going to be exceedingly rare. >> >> With passing structures by value you can have arbitrary large >> parameters. >> >> Andreas. >> > > > No. Those are passed by copies which appear in the locals portion of * pointers to copies * R.
> the frame (so are covered by normal allocation priniciples). Only > structures of less than 16 bytes are passed by direct copy. > > R. >
