Re: [RFC] ELF Relocatable x86 and x86_64 bzImages

[Jan Kratochvil]

On Tue, 01 Aug 2006 21:26:28 +0200, Vivek Goyal wrote:
...
> 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.

This is exactly the approach of mkdump version <=1.0
	http://mkdump.sourceforge.net/
As documented by Itsuro Oda:
	http://mkdump.cvs.sourceforge.net/mkdump/doc/mini_kernel_tech_note.txt?revision=1.1

There is a problem all the drivers expect that allocated buffer address can be
passed directly as physical address to the hardware.  mkdump-1.0 has a lot of
backward-mappings for these drivers but you can never catch all of them.


Regards,
Lace
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