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Date: Fri, 30 Nov 2001 17:24:32 -0800
From: "H. Peter Anvin" <hpa@zytor.com>
Organization: Zytor Communications
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To: Davide Libenzi <davidel@xmailserver.org>
CC: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] task_struct colouring ...
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Davide Libenzi wrote:

> 
> Again this is the  "current"  diff :
> 
>  static inline struct task_struct * get_current(void)
>  {
> -       struct task_struct *current;
> -       __asm__("andl %%esp,%0; ":"=r" (current) : "0" (~8191UL));
> -       return current;
> +       unsigned long *tskptr;
> +       __asm__("andl %%esp,%0; ":"=r" (tskptr) : "0" (~8191UL));
> +       return (struct task_struct *) *tskptr;
>  }
> 
> that will probably resolve in something like:
> 
> movl %esp, %eax
> andl $-8192, %eax
> movl (%eax), %eax
> 


This seems to confuddle the idea of colouring the kernel stack.

	-hpa


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