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Re: runtimeimage of kernel module

Ravi K wrote:
> 
> Hi,
>   The code in copy_thread() which sets the ESP is like
> this:
> 
>  childregs = ((struct pt_regs *) (THREAD_SIZE +
>                            unsigned long) p)) - 1;
>  ...
>  ...
>  p->thread.esp = (unsigned long) childregs;
> 
>  The value of THREAD_SIZE is 8192. So, effectively the
> ESP is set to (p + 8191), which is top of the
> allocated kernel stack.
>  From what I understand, the esp value passed in
> pt_regs is the task's user-mode stack pointer
> (probably used when switching back to user-mode).

Thank you, that makes perfect sense!

Cheers,

-- Joe
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