Re: Multiboot ELF segment handling patch

[Alexander Boettcher]

Hello,

On 17.04.2018 21:40, Daniel Kiper wrote
>> The overriden memory may contain device memory (vga text mode e.g.), which
>> leads to strange boot behaviour.
> 
> Have you been able to take a look at memory allocator/relocator code why
> this happened?

for me it looks like, that either already
grub_relocator_alloc_chunk_addr or at latest
grub_relocator_prepare_relocs should bail out with an error, if the
memory range of the VGA memory (0xa0000 ++) is covered.

What I don't know, respectively didn't found in the code, how and where
this information about this VGA text memory area is excluded/reserved
from the allocator/reallocator. Maybe you can give me a hint ?

Cheers,

-- 
Alexander Boettcher
Genode Labs

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