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Mac OS X/ARM abi

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Mac OS X/ARM abi

Subject: Mac OS X/ARM abi
From: Jonas Maebe <email@hidden>
Date: Sat, 4 Oct 2008 16:00:44 +0200

(this is about information which in principle is freely available via the Apple-published gcc and llvm source code, so it should not be NDA- related)

Hello,

Which abi does Mac OS X/ARM use? At first sight it seems to be the oabi (old abi, as opposed to the eabi) in combination with the regular Darwin function call stubs, lazy/non lazy import symbols etc as on ppc32/ppc64/i386. But I found e.g. in the llvm code generator that r9 is not available on Darwin, and I guess there are more such small details which are easy to overlook.

Even if no complete documentation is available, information about some gotchas like the r9 issue would be appreciated.

Thanks,


Jonas
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