From: James Bottomley <James.Bottomley@SteelEye.com>
To: Randolph Chung <randolph@tausq.org>
Cc: PARISC list <parisc-linux@lists.parisc-linux.org>
Subject: Re: [parisc-linux] kernel module relocation bug
Date: 29 Nov 2004 09:33:53 -0600 [thread overview]
Message-ID: <1101742439.1714.11.camel@mulgrave> (raw)
In-Reply-To: <20041127064710.GL9148@tausq.org>
On Sat, 2004-11-27 at 00:47, Randolph Chung wrote:
> currently the kernel module loader does not support long branch stubs.
> using the debian 2.6.8-1 kernel, when loading the ipv6 module, i see:
>
> legolas[6:43] linux-2.6% sudo modprobe ipv6
> FATAL: Error inserting ipv6 (/lib/modules/2.6.8-1-32-smp/kernel/net/ipv6/ipv6.ko): Invalid module format
This is pretty nasty. The problem isn't a bad relocation, its that the
relocation target is too far away (i.e. ipv6 is too big).
We get around this in the kernel by using -ffunction-sections so that
the real linker can insert stubs between functions. However,
calculating how to do that in the in-kernel module loader would not be a
whole lot of fun.
James
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next prev parent reply other threads:[~2004-11-29 15:33 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-27 6:47 [parisc-linux] kernel module relocation bug Randolph Chung
2004-11-29 15:32 ` James Bottomley
2004-11-29 15:33 ` James Bottomley [this message]
2004-11-29 19:27 ` Ulrich Teichert
2004-11-29 19:46 ` Randolph Chung
2004-11-29 22:51 ` Ulrich Teichert
2004-11-29 23:46 ` John David Anglin
2004-12-02 21:54 ` [parisc-linux] Userland relocation problems resolved (was: kernel module relocation bug) Ulrich Teichert
2004-12-02 22:51 ` [parisc-linux] Re: Userland relocation problems resolved (was: kernel module relocat John David Anglin
2004-11-29 23:53 ` [parisc-linux] kernel module relocation bug John David Anglin
2004-11-29 23:54 ` Randolph Chung
2004-11-29 23:57 ` Randolph Chung
2004-11-30 0:08 ` John David Anglin
2004-11-30 0:11 ` James Bottomley
2004-11-30 0:23 ` John David Anglin
2004-11-30 1:18 ` James Bottomley
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