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Re: [EXTERNAL] Re: grub-2.06 fails to load 64bit Multiboot2 ELF with reg
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From: |
Daniel Kiper |
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Subject: |
Re: [EXTERNAL] Re: grub-2.06 fails to load 64bit Multiboot2 ELF with regions above 4GiB |
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Date: |
Wed, 28 Jun 2023 18:05:30 +0200 |
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User-agent: |
NeoMutt/20170113 (1.7.2) |
On Fri, Jun 23, 2023 at 03:10:36PM +0000, Baksik, Fred [USA] wrote:
> That is only true when boot services is enabled. Which is not always true.
> The OS we are loading does not include the boot services tag.
>
> Also it looks like the 4GiB limit was introduced with support of the 3.1.13
> Relocatable header tag.
> It appears that the extra restriction on non-relocatable images was
> interjected
> as a side effect.
OK, probably it should be done separately. Sorry, my fault. However, if
you do not run GRUB on x86-64 EFI platform how do you want to load the
image above 4 GiB? The Multiboot2 spec clearly states the machine has to
be in 32-bit mode during transition from the bootloader to the kernel.
I think it would be very helpful if you describe your use case in details.
Daniel