AMD64 ABI compatibility

Nicolas Alt nalt@apple.com
Mon Jul 9 19:48:00 GMT 2007


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.

Thanks,
Nicolas



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