From: David Gibson <david@gibson.dropbear.id.au>
To: Segher Boessenkool <segher@kernel.crashing.org>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: [RFC 3/3] zImage: Exception vector support
Date: Wed, 21 Feb 2007 11:16:53 +1100 [thread overview]
Message-ID: <20070221001653.GB10231@localhost.localdomain> (raw)
In-Reply-To: <fc45fc62b1568ccaedb712d3a6eb5ca0@kernel.crashing.org>
On Tue, Feb 20, 2007 at 05:02:11PM +0100, Segher Boessenkool wrote:
> > +ps3)
> > + platformo="$object/head.o $object/ps3-hvcall.o $object/ps3.o"
> > + ;;
> >
> > Having those vectors makes a 4MB dead gap in the binary image. The
> > ps3's
> > loader supports a gziped image so there is no problem, but for the
> > general
> > case of binary images, there is no way we can have those always in
> > there.
>
> If this is an ELF file, you can put the exception vectors in a
> separate segment. Or if you don't need the entry point to
> be in the low region, (and you don't need that unless your
> boot loader ignores the entry point in the ELF header), you can
> copy the vectors in at startup and have no code linked at 0 at
> all.
No, the initial loader has a hard-wired entry point, that's why this
is necessary.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
next prev parent reply other threads:[~2007-02-21 0:16 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-18 1:17 [RFC 3/3] zImage: Exception vector support Geoff Levand
2007-02-18 1:40 ` Josh Boyer
2007-02-19 15:03 ` Geoff Levand
2007-02-19 19:55 ` Benjamin Herrenschmidt
2007-02-19 20:40 ` Geoff Levand
2007-02-19 20:51 ` Benjamin Herrenschmidt
2007-02-19 21:35 ` Josh Boyer
2007-02-19 21:39 ` Geoff Levand
2007-02-19 21:51 ` Josh Boyer
2007-02-19 0:34 ` Paul Mackerras
2007-02-20 2:25 ` David Gibson
2007-02-20 14:23 ` Geoff Levand
2007-02-20 15:44 ` Geoff Levand
2007-02-20 16:02 ` Segher Boessenkool
2007-02-21 0:16 ` David Gibson [this message]
2007-02-23 17:06 ` Benjamin Herrenschmidt
2007-02-23 17:52 ` Segher Boessenkool
2007-02-21 0:16 ` David Gibson
2007-02-23 17:06 ` Benjamin Herrenschmidt
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