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Re: AMD64 ABI compatibility


On Mon, Jul 09, 2007 at 12:48:10PM -0700, Nicolas Alt wrote:
> Hi!
> 
> On the AMD64 / x86-64Bit architecture, some arguments of a functions  
> are passed using registers, but there seem to be two different  
> conventions out there. The standard ABI uses 6 registers, but  
> Microsoft compilers use only 4. Because of that, code compiled with  
> gcc cannot call code compiled with a MS compiler without an ugly  
> wrapper.
> 
> Have there been any efforts to make gcc do function calls the MS way?  
> I guess this would be an important feature for mingw on AMD64.

Gcc supports several different ABIs via __attribute__ in the same
source file for ia32.  I don't see why it shouldn't work on x86-64.


H.J.


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