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Date: Sun, 22 Jul 2001 08:53:30 -0700
From: Richard Henderson <rth@twiddle.net>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Why Plan 9 C compilers don't have asm("")
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On Sun, Jul 22, 2001 at 12:44:57AM -0700, Linus Torvalds wrote:
> But if you don't do that, you don't need a stack frame. You just reload GP
> and jump back to the caller.

Hmm.  Yes, that could work.  We'd still be changing the ABI, since
the original source "bsr foo" would really mean "bsr foo+skip ldgp".
But perhaps one that wouldn't matter for all practical purposes.

This would need to be done with a new relocation type so that old
linkers that didn't handle this sort of thing choke, but that's not
a big deal.

If I find the time I may give it a shot and see what sort of 
effect it has on typical code.


r~
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