From: Adam Nielsen <a.nielsen@shikadi.net>
To: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Subject: Re: Can you add a signature to the kernel ELF image?
Date: Wed, 25 Nov 2009 21:34:50 +1000 [thread overview]
Message-ID: <4B0D165A.5030500@shikadi.net> (raw)
In-Reply-To: <20091124234406.GB20316@linux-mips.org>
> Take a look at arch/mips/kernel/head.S. This file will be the first on
> the final linker call's command line, that is head.S's .text section will
> end at the lowest address.
Ah excellent, that combined with the linker script (to twiddle load addresses)
is just what I'm after.
> #ifdef CONFIG_NCD_HMX
> b 1f
> nop
> nop
> .word 0x20
> .asciz "XncdHMX"
> .word 0, 0, 0
> #endif
Perfect, thanks for the example, that makes it much easier.
>> [1] http://www.linux-mips.org/wiki/HMX
>
> The wiki page says something about a CRC but just poking a 0x20 into a
> constant address is not exactly a CRC calculation. Not sure how this
> really is meant.
As far as I'm aware 0x20 means "ignore the CRC", I think the CRC itself is
covered by one of the zero words.
Cheers,
Adam.
prev parent reply other threads:[~2009-11-25 11:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-24 22:46 Can you add a signature to the kernel ELF image? Adam Nielsen
2009-11-24 23:39 ` David Daney
2009-11-24 23:44 ` Ralf Baechle
2009-11-25 11:34 ` Adam Nielsen [this message]
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