🚀 go-pugleaf

Frank Kotler 寫道：

> cmk128@hotmail.com wrote:
> > thanks for the great answrer,
>
> Sorry, I couldn't resist. :) Nathan gave you a more serious answer.
>
> > my memory layout is like that:
> >
> > OS library : 0x1800000
> > OS code   : 0x1600000
> >
> > And my SS is 0x0 and ESP is 0x16ffffff,
>
> Do you mean SS.base is 0x0? SS = 0 would be an invalid selector. Or are
> we not in pmode yet? In any case, you've got a badly misaligned stack!
> Use a "round number". 0x17000000 should be okay for an initial esp.
>
> > that's why i go the negative
> > value in the OS library. But it is already? in my os library function,
> > when i declare a char array which larger than 4KB, i got a GP (general
> > protection fault). Please give me some suggestions to solve this.
>
> You can hardly expect us to diagnose problems in your OS! 4k sounds like
> a probable page size - maybe an error in your "page not present" handling?
>
> Might be more of an a.o.d. question than either asm or gnu gcc...
> Essentially, you need someone to debug your code for you, and you're
> probably not going to find anyone, so you'll have to do it yourself. You
> use Bochs, right? That's supposed to tell you something (I've never used
> it). Or you could "instrument" your code - put something on the screen,
> or beep, before each section of code, so you can at least see how far
> you got before the crash...
>
> As Betov says, "Courage!"
>
> Best,
> Frank

Hi Frank
    I fixed the problem, a negative value is ok, i proved it myself. My
stack frame is in lower memory location then the code frame, and it has
no problem. It was a c++ programming mistake in my code before, now
fixed.
thanks again
from Peter (cmk128@hotmail.com)