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Date: Mon, 10 Aug 2009 13:41:03 +0200
From: Robert Millan <rmh@aybabtu.com>
To: The development of GRUB 2 <grub-devel@gnu.org>
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On Sat, Aug 08, 2009 at 10:44:25PM +0800, Bean wrote:
> Hi,
> 
> I also encounter this problem with apple gcc 4.0, the fix is to replace:
> 
> asm volatile ("jmp *%2" : : "b" (0), "S" (real_mode_mem), "g"
> (params->code32_start));
> 
> With:
>   asm volatile ("movl %0, %%ecx" : : "m" (params->code32_start));
>   asm volatile ("movl %0, %%esi" : : "m" (real_mode_mem));
> 
>   asm volatile ("xorl %%ebx, %%ebx" : : );
>   asm volatile ("jmp *%%ecx" : : );

I think I did precisely the opposite change a while ago, with the purpose of
general cleanup (to make it more compact and avoid generating unnecessary
instructions).

-- 
Robert Millan

  The DRM opt-in fallacy: "Your data belongs to us. We will decide when (and
  how) you may access your data; but nobody's threatening your freedom: we
  still allow you to remove your data and not access it at all."