Re: mapping reserved memory causes page faults
Posted: Wed Nov 18, 2020 1:23 pm
I'm pretty sure I had relocated the stack, but that sounds like it might explain it.MichaelPetch wrote:However if I had to guess what was going on here is that your bootloader didn't set SS:SP to some place where the stack wouldn't be clobbered. In BOCHS the stack is originally set to start at 0x0000:0x0000 which means the first word pushed on the stack will be at 0x0000:0xfffe . That would be just below physical address 0x10000 as well. If you overwrite the stack while the disk interrupt is executing it will do weird and wonderful things.