[CFT] ELF Relocatable x86 and x86_64 bzImages

From: Eric W. Biederman
Date: Mon Jul 31 2006 - 12:18:38 EST

I have spent some time and have gotten my relocatable kernel patches
working against the latest kernels. I intend to push this upstream

Could all of the people who care take a look and test this out
to make certain that it doesn't just work on my test box?

My approach is to extend bzImage so that it is an ET_DYN ELF executable
(we have what used to be a bootsector where we can put the header).
Boot loaders are explicitly not expected to process relocations.

The x86_64 kernel is simply built to live at a fixed virtual address
and the boot page tables are relocated. The i386 kernel is built
to process relocates generated with --embedded-relocs (after vmlinux.lds.S)
has been fixed up to sort out static and dynamic relocations.

Currently there are 33 patches in my tree to do this.

The weirdest symptom I have had so far is that page faults did not
trigger the early exception handler on x86_64 (instead I got a reboot).

The code should be available shortly at:

If all goes well with the testing I will push the patches to Andrew in the next couple
of days.

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