young dave wrote:
> Hi,
>
> kernel booting and stopped in edd.c:read_sector.
>
> I add debug messages around the two inline assemblly sentence, recompile
> kernel,
> now strange thing happend, the kernel booting directly, but the printf
> messages can't be seen because it's too rapid.
>
> can we use printk in boot code?
Well, it's spelt "printf", but same thing. (Since it doesn't take a
logging priority, it seems better to name it printf.)
This implies a miscompile somewhere, *or* that your bios stomps on
registers that gcc expect preserved, and adding printf's disturbs the
register allocation sufficiently.
Could you send me the arch/i386/boot/setup.elf file from the original,
failed, build?
Thanks.
-hpa
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