From: Albert ARIBAUD <albert.aribaud@free.fr>
To: u-boot@lists.denx.de
Subject: [U-Boot] ARM relocation, question to Heiko
Date: Sun, 03 Oct 2010 10:58:00 +0200 [thread overview]
Message-ID: <4CA84598.9070204@free.fr> (raw)
In-Reply-To: <4CA8426E.4060505@gmail.com>
Le 03/10/2010 10:44, Graeme Russ a ?crit :
>> Bill just said that -pic (or, for ARM, -fPIC or -fPIE) was unnecessary
>> for relocation. You seem to imply it actually is... In my experience,
>> -fPIC and-fPIE do increase code by adding GOT relocation to symbols that
>> need fixing, so they would indeed be redundant to any other relocation
>> mechanism -- I just did some test with basic code and this seems to
>> confirm, no -fPIx is needed to get relocation the way you do on ARM.
>
> Just to clarify -fpic is a compiler option, -pic is a linker option. x86
> has no compile time relocation options (therefore no referencing .got etc).
> Using the link time pic option produces the relocation data table
> (.rel.dyn) which must be pre-processed before execution can begin at the
> relocated address
Thanks for clarifying, Graeme.
This is consistent with the ARM compile-time options -fPIC/-fPIE vs
link-time option -pie. So there may be at least an interest in
investigating ELF-style relocation on ARM and comparing it to GOT-based
relocation in terms of FLASH and RAM sizes and code speed.
> Cheers,
>
> Graeme
Amicalement,
--
Albert.
next prev parent reply other threads:[~2010-10-03 8:58 UTC|newest]
Thread overview: 113+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-30 13:57 [U-Boot] ARM relocation, probably trivial mistake Reinhard Meyer
2010-09-30 14:08 ` Stefano Babic
2010-09-30 14:20 ` Reinhard Meyer
2010-09-30 15:39 ` Heiko Schocher
2010-09-30 16:06 ` Reinhard Meyer
2010-09-30 15:38 ` Heiko Schocher
2010-09-30 17:43 ` Wolfgang Denk
2010-10-01 5:25 ` Heiko Schocher
2010-10-01 5:40 ` Albert ARIBAUD
2010-10-01 5:53 ` Heiko Schocher
2010-10-01 6:39 ` Reinhard Meyer
2010-10-01 6:57 ` Heiko Schocher
2010-10-01 8:45 ` Wolfgang Denk
2010-10-01 7:01 ` Albert ARIBAUD
2010-10-01 7:42 ` [U-Boot] ARM relocation, probably trivial mistake - back to original problem Reinhard Meyer
2010-10-01 8:27 ` Heiko Schocher
2010-10-01 10:44 ` Reinhard Meyer
2010-10-01 10:55 ` Wolfgang Denk
2010-10-01 11:03 ` Reinhard Meyer
2010-10-01 11:21 ` Wolfgang Denk
2010-10-01 11:37 ` Reinhard Meyer
2010-10-01 11:59 ` Wolfgang Denk
2010-10-01 12:22 ` Reinhard Meyer
2010-10-01 12:47 ` Reinhard Meyer
2010-10-01 12:55 ` Wolfgang Denk
2010-10-01 14:55 ` Reinhard Meyer
2010-10-02 8:53 ` Heiko Schocher
2010-10-01 15:47 ` Steve Sakoman
2010-10-02 7:15 ` [U-Boot] ARM relocation, question to Heiko Reinhard Meyer
[not found] ` <4CA6E517.9040701@fr<1286167382.22760.19.camel@ptyser-laptop>
2010-10-02 7:53 ` Albert ARIBAUD
2010-10-02 8:10 ` Reinhard Meyer
2010-10-02 8:26 ` Albert ARIBAUD
2010-10-03 18:04 ` Wolfgang Denk
2010-10-02 9:08 ` Heiko Schocher
2010-10-02 9:29 ` Albert ARIBAUD
2010-10-03 18:05 ` Wolfgang Denk
2010-10-02 10:17 ` Joakim Tjernlund
2010-10-02 16:21 ` J. William Campbell
2010-10-02 18:33 ` Reinhard Meyer
2010-10-03 18:22 ` Wolfgang Denk
2010-10-02 20:39 ` Reinhard Meyer
2010-10-02 21:09 ` Albert ARIBAUD
2010-10-02 23:07 ` Graeme Russ
2010-10-03 7:10 ` Albert ARIBAUD
2010-10-03 8:44 ` Graeme Russ
2010-10-03 8:58 ` Albert ARIBAUD [this message]
2010-10-03 15:36 ` J. William Campbell
2010-10-03 16:47 ` Albert ARIBAUD
2010-10-03 17:54 ` Albert ARIBAUD
2010-10-03 18:43 ` Wolfgang Denk
2010-10-04 5:41 ` Heiko Schocher
2010-10-03 18:29 ` Wolfgang Denk
2010-10-03 19:26 ` J. William Campbell
2010-10-04 5:52 ` Heiko Schocher
2010-10-03 18:14 ` Wolfgang Denk
2010-10-03 18:54 ` J. William Campbell
2010-10-03 19:52 ` Albert ARIBAUD
2010-10-03 18:03 ` Wolfgang Denk
2010-10-03 18:34 ` Albert ARIBAUD
2010-10-03 18:45 ` Wolfgang Denk
2010-10-04 6:08 ` Heiko Schocher
2010-10-04 6:40 ` Albert ARIBAUD
2010-10-04 7:27 ` Reinhard Meyer
2010-10-04 8:28 ` Albert ARIBAUD
2010-10-04 8:57 ` Heiko Schocher
2010-10-04 9:27 ` Albert ARIBAUD
2010-10-04 10:01 ` Joakim Tjernlund
2010-10-04 9:58 ` Graeme Russ
2010-10-04 14:17 ` Albert ARIBAUD
2010-10-04 14:25 ` Rogan Dawes
2010-10-04 15:24 ` Albert ARIBAUD
2010-10-04 16:31 ` Stefan Roese
2010-10-04 21:31 ` Albert ARIBAUD
2010-10-04 7:44 ` Albert ARIBAUD
2010-10-04 4:43 ` Peter Tyser
2010-10-04 6:08 ` Wolfgang Denk
2010-10-04 7:36 ` Joakim Tjernlund
2010-10-04 8:08 ` Albert ARIBAUD
2010-10-04 8:28 ` Joakim Tjernlund
2010-10-04 8:33 ` Albert ARIBAUD
[not found] ` <OF05779DA1.EF3C4954-ONC12577B2.00307A0D-C12577B2.0030B9C0@tran <4CAA1613.80002@comcast.net>
2010-10-04 8:52 ` Joakim Tjernlund
2010-10-04 9:10 ` Albert ARIBAUD
2010-10-04 10:13 ` Wolfgang Denk
2010-10-04 15:28 ` J. William Campbell
2010-10-04 15:52 ` Albert ARIBAUD
2010-10-04 17:06 ` Wolfgang Denk
2010-10-04 17:59 ` J. William Campbell
2010-10-04 18:43 ` Joakim Tjernlund
2010-10-04 21:10 ` Wolfgang Denk
2010-10-05 7:26 ` Joakim Tjernlund
2010-10-04 17:04 ` Graeme Russ
2010-10-04 17:14 ` Wolfgang Denk
2010-10-04 8:27 ` Wolfgang Denk
2010-10-02 8:49 ` [U-Boot] ARM relocation, probably trivial mistake - back to original problem Heiko Schocher
2010-10-01 12:49 ` Wolfgang Denk
2010-10-01 14:48 ` Reinhard Meyer
2010-10-04 7:44 ` [U-Boot] AT91 clock and timer cleanups (was: ARM relocation, probably trivial mistake - back to original problem) Reinhard Meyer
2010-10-04 8:32 ` Wolfgang Denk
2010-10-04 8:42 ` [U-Boot] AT91 clock and timer cleanups Reinhard Meyer
2010-10-04 8:49 ` Wolfgang Denk
2010-10-04 8:52 ` Reinhard Meyer
2010-10-04 9:03 ` Wolfgang Denk
2010-10-04 9:12 ` Reinhard Meyer
2010-10-04 14:58 ` Reinhard Meyer
2010-10-04 17:00 ` Wolfgang Denk
2010-10-04 17:15 ` Reinhard Meyer
2010-10-04 17:32 ` Wolfgang Denk
2010-10-04 19:22 ` Reinhard Meyer
2010-10-01 8:48 ` [U-Boot] ARM relocation, probably trivial mistake - back to original problem Wolfgang Denk
2010-10-01 9:50 ` Reinhard Meyer
2010-10-01 8:03 ` [U-Boot] ARM relocation, probably trivial mistake Wolfgang Denk
2010-10-01 7:51 ` Wolfgang Denk
2010-10-01 8:28 ` Heiko Schocher
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