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From: Segher Boessenkool <segher@kernel.crashing.org>
To: Geoff Levand <geoffrey.levand@am.sony.com>
Cc: linuxppc-dev@ozlabs.org, David Gibson <david@gibson.dropbear.id.au>
Subject: Re: [RFC 3/3] zImage: Exception vector support
Date: Tue, 20 Feb 2007 17:02:11 +0100	[thread overview]
Message-ID: <fc45fc62b1568ccaedb712d3a6eb5ca0@kernel.crashing.org> (raw)
In-Reply-To: <45DB1759.2010302@am.sony.com>

> +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.


Segher

  reply	other threads:[~2007-02-20 16:02 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 [this message]
2007-02-21  0:16         ` David Gibson
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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