how can I get esp value?

[Scott J]

Hi, all
	I've a small problem for helping. For I'm not so familiar with AT&T assembly language, how can I get current esp of i386 in a  C-style function ? The function may be:
	
	unsigned32	i386_get_esp( void )
	{
		/* return current esp */
	}
	
	TIA.
	
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Scott J