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Re: Latest sources from CVS.

To: Thiemo Seufer <>
Subject: Re: Latest sources from CVS.
From: "Maciej W. Rozycki" <>
Date: Fri, 6 Dec 2002 18:01:18 +0100 (MET)
Cc: Carsten Langgaard <>, Ralf Baechle <>, "Kevin D. Kissell" <>,
In-reply-to: <>
Organization: Technical University of Gdansk
Original-recipient: rfc822;
On Fri, 6 Dec 2002, Thiemo Seufer wrote:

> >  Which wouldn't work either as it implies 32-bit pointers, while gcc still
> > emits 64-bit assembly.
> Which should be enough for smaller address spaces.

 But gas will complain of the same address truncation as for o32. 

> > If we want to preserve the setup cleanly, we
> > probably need yet another ABI model in gcc (especially in the face of the
> > coming changes to get rid of assembly macros), with sign-extended 32-bit
> > pointers for accessing program segments and 64-bit ones for the remaining
> > addresses.
> Do you think this is worth the hassle? N64 offers better flexibility in
> the large memory case at some performance cost, and it's conceptionally
> cleaner.

 Remember we are writing of the kernel -- we don't know what userland is
going to bring us -- a user pointer need not fit in 32 bits.

+  Maciej W. Rozycki, Technical University of Gdansk, Poland   +
+        e-mail:, PGP key available        +

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