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Re: [Xen-devel] [PATCH] Elf loader fixes

Gerd Hoffmann wrote:
The elf kernel loader certainly doesn't look like it cares much
about virtual address (other than VIRT_BASE) ...

Correct. And the same applies to boot loaders.

Well, the difference between xen and other boot loaders is that xen
boots the kernel with paging already enabled ...

actually, there have historically been a ton of boot loaders that boot with paging already enabled: just go back to the early Suns; part of the task of SunOS was to move the firmware's page tables to kernel space and use them until it could build its own.

I hit this when I ported sunos to a machine with firmware that did not set up page tables.

it's been very common, in the non-PC world, to have paging turned on very early.

Just a historical comment of no value to this discussion :-)


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