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From: Wolfgang Denk <wd@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] arm: add 8-byte alignment for ABI compliance before board_init_f
Date: Fri, 12 Nov 2010 10:56:02 +0100	[thread overview]
Message-ID: <20101112095602.5929D193@gemini.denx.de> (raw)
In-Reply-To: <4CDD0D1F.7010805@gmail.com>

Dear Graeme Russ,

In message <4CDD0D1F.7010805@gmail.com> you wrote:
>
> > Passing gd as parameter makes no sense, thoug, as it's global data and
> > we reserve a register to store it's address, so it can always be used
> > with minimal overhead.
> 
> Which is a really nice idea if you have a register to spare. Unfortunately,
> x86 does not have this luxury, and the only way I can get gd (and as a
> consequence upper memory bound for relocation) is to allocate it in
> assembler and pass to C as a function argument

Agreed - x86 has always it's own set of limitations.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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design tool -- programmers draw flowcharts after, not before, writing
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  reply	other threads:[~2010-11-12  9:56 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-11-12  6:53 [U-Boot] [PATCH] arm: add 8-byte alignment for ABI compliance before board_init_f Heiko Schocher
2010-11-12  7:06 ` Reinhard Meyer
2010-11-12  7:19   ` Heiko Schocher
2010-11-12  8:04     ` Albert ARIBAUD
2010-11-12  8:50     ` Graeme Russ
2010-11-12  8:50   ` Wolfgang Denk
2010-11-12  9:47     ` Graeme Russ
2010-11-12  9:56       ` Wolfgang Denk [this message]
2010-11-12  7:53 ` Albert ARIBAUD
2010-11-12  8:05   ` Heiko Schocher
2010-12-08 22:50 ` Wolfgang Denk

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