On Sun, Jan 13, 2013 at 11:00 PM, Thomas Baier <ba...@microsys.de> wrote: > Dear list, > > I've just subscribed to the list and I hope this is the right place for > the following question. > > The operating system I'd like to use gcc for (OS-9, for the curious) > requires an ABI, where global variables are only accessed through > register indirect addressing. On the powerpc platform, r2 is used for > indirect addressing. There is already a feature in gcc which can use > register indirect addressing for the powerpc target for global variables > using a special small data area, but unfortunately this is not enough. > > Currently I'm a bit lost in where to start reading to get an idea how I > could add this new ABI to gcc. Can you please point me to some reading > or maybe even share some ideas how this could be accomplished?
The Mac OS 9 ABI is very similar to the AIX ABI. So you should be able to start with the AIX ABI and go from there. Thanks, Andrew
