| To: | linux-mips@linux-mips.org |
|---|---|
| Subject: | Re: 64-bit and N32 kernel interfaces |
| From: | Daniel Jacobowitz <dan@debian.org> |
| Date: | Thu, 5 Sep 2002 09:41:31 -0400 |
| In-reply-to: | <Pine.GSO.3.96.1020905111911.2423D-100000@delta.ds2.pg.gda.pl> |
| Mail-followup-to: | linux-mips@linux-mips.org |
| Original-recipient: | rfc822;linux-mips@linux-mips.org |
| References: | <3D76FC6B.C9AA72F3@mips.com> <Pine.GSO.3.96.1020905111911.2423D-100000@delta.ds2.pg.gda.pl> |
| Sender: | linux-mips-bounce@linux-mips.org |
| User-agent: | Mutt/1.5.1i |
On Thu, Sep 05, 2002 at 11:23:33AM +0200, Maciej W. Rozycki wrote: > On Thu, 5 Sep 2002, Carsten Langgaard wrote: > > > > The (n)64 versions seem suitable and the o32 ones do not as n32 only > > > crops addresses to 32-bit -- data may still be 64-bit (e.g. file position > > > pointers). > > > > Please notice, that a 'long' is 32-bit for n32, so we need to do the same > > conversion for a lot of syscalls, as we already do for o32. > > Any reference? AFAIK, long is 64-bit for n32 and only void * is 32-bit. > It doesn't make sense otherwise. Nope, it looks like long is 32-bit according to GCC. It means that 64-bit quantities (long long, structures) can go in integer registers. -- Daniel Jacobowitz MontaVista Software Debian GNU/Linux Developer |
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