linux-kernel - Re: [RFC] ELF Relocatable x86 and x86

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Message-ID: <44CFB8C4.8060904@zytor.com>
Date:	Tue, 01 Aug 2006 13:25:40 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	vgoyal@...ibm.com
CC:	"Eric W. Biederman" <ebiederm@...ssion.com>, fastboot@...l.org,
	linux-kernel@...r.kernel.org, Horms <horms@...ge.net.au>,
	Jan Kratochvil <lace@...kratochvil.net>,
	Magnus Damm <magnus.damm@...il.com>,
	Linda Wang <lwang@...hat.com>
Subject: Re: [RFC] ELF Relocatable x86 and x86_64 bzImages

Vivek Goyal wrote:
> 
> Hi Eric,
> 
> Can't we use the x86_64 relocation approach for i386 as well? I mean keep
> the virtual address space fixed and updating the page tables. This would
> help in the sense that you don't have to change gdb if somebody decides to
> debug the relocated kernel.
> 
> Any such tool that retrieves the symbol virtual address from vmlinux will
> be confused.
> 

I don't think this is practical given the virtual space constraints on 
i386 systems.

	-hpa

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