Re: [Geekos-devel] Project 2 Question

[David H. <dav...@gm...>]

Set the kernel stack pointer, meaning the value
that should be loaded in the ESP register
upon return to ring 0 (kernel mode)
after executing in ring 3 (user mode).

-Dave

On Thu, Apr 17, 2008 at 1:42 AM,  <wm...@ao...> wrote:
> In project 2, user.c, the following function comments say to set the kernel
> stack pointer.  To what?  I am confused here. Any help would be appreciated.
>
>
>  void Switch_To_User_Context(struct Kernel_Thread* kt, struct
> Interrupt_State* is)
>  {
>      /*
>       * Hint: Before executing in user mode, you will need to call
>       * the Set_Kernel_Stack_Pointer() and Switch_To_Address_Space()
>       * functions.
>       */
>
>      ...
>
>          Set_Kernel_Stack_Pointer((ulong_t) ?);
>
>
>      ...
>  }
>
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