On Mon, Apr 23, 2018 at 08:26:34PM +0200, Alexander Boettcher wrote: > 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.
Exactly! > 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 ? I have skimmed through the code and I think that you should take a look at grub-core/kern/i386/pc/init.c, grub-core/kern/mm.c and grub-core/lib/relocator.c. At first sight it looks that grub-core/kern/i386/pc/init.c:grub_machine_init() is the most interesting thing. I hope that helps. If you have further questions drop me a line. Thank you for taking a stab at this. Daniel _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
