On Mon, 2013-01-07 at 18:43 +0000, Matthew Garrett wrote: > The kernel does, the EFI boot stub doesn't. There's probably an argument > for having it fail in that case, but it wouldn't even be able to print > an error message without some gymnastics. Printing an error message is simple enough from assembler; you just need to call sys_table->con_out->output_string. What should it say? "Sorry, this kernel cannot boot in " (32|64) "-bit mode this way. Your bootloader should have ignored the shiny new EFI handover protocol and booted it the old way. It would have worked then, albeit without EFI runtime services. Which you probably wouldn't have missed." -- dwmw2
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