Messages in this thread | | | Date | Tue, 12 Jun 2012 14:16:27 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [question] x86/x86_64 boot process |
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On 06/12/2012 02:14 PM, Brandon Falk wrote: > All I really see related to the post-setup stage is: > > 'The 32-bit (non-real-mode) kernel starts at offset (setup_sects+1)*512 > in the kernel file (again, if setup_sects == 0 the real value is 4.) > It should be loaded at address 0x10000 for Image/zImage kernels and > 0x100000 for bzImage kernels.' > > I've read this document a few times, and it doesn't seem to mention if > the kernel assists in loading. Do I have to load up the whole > protected-mode kernel? Just the first few sectors? I guess that's what > I'm trying to figure out, and I feel the boot.txt has not answered > that for me. >
I would also strongly discourage you from writing a new bootloader if you can avoid it. You *certainly* want to avoid the use of the fixed 0x90000 address, that is a decade obsolete.
-hpa
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