linux-kernel - Re: [PATCH] i386: Execute stack overflow warning on interrupt stack

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Message-ID: <481AE2A1.7000201@gmail.com>
Date:	Fri, 02 May 2008 11:45:05 +0200
From:	Jiri Slaby <jirislaby@...il.com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	linux-kernel@...r.kernel.org, mingo@...e.hu, tglx@...utronix.de,
	sandeen@...deen.net
Subject: Re: [PATCH] i386: Execute stack overflow warning on interrupt stack

On 05/02/2008 11:18 AM, Andi Kleen wrote:
> i386: Execute stack overflow warning on interrupt stack
[...]
> --- linux.orig/arch/x86/kernel/irq_32.c
> +++ linux/arch/x86/kernel/irq_32.c
> @@ -61,6 +61,26 @@ static union irq_ctx *hardirq_ctx[NR_CPU
>  static union irq_ctx *softirq_ctx[NR_CPUS] __read_mostly;
>  #endif
>  
> +static void stack_overflow(void)
> +{
> +	printk("low stack detected by irq handler\n");
> +	dump_stack();
> +}
> +
> +static inline void call_on_stack2(void *func, unsigned long stack,
> +			   unsigned long arg1, unsigned long arg2)
> +{
> +	unsigned long bx;
> +	asm volatile(
> +			"       xchgl  %%ebx,%%esp    \n"
> +			"       call   *%%edi         \n"
> +			"       movl   %%ebx,%%esp    \n"
> +			: "=a" (arg1), "=d" (arg2), "=b" (bx)
> +			:  "0" (arg1),   "1" (arg2),  "2" (stack),
> +			   "D" (func)
> +			: "memory", "cc", "ecx');

Am I seeing wrong, or is it a ' after the ecx?
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