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Date: Wed, 6 Apr 2011 21:37:48 +1000 (EST)
From: Bruce Evans <brde@optusnet.com.au>
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To: Kostik Belousov <kostikbel@gmail.com>
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Cc: d@delphij.net, freebsd-amd64@FreeBSD.org, freebsd-arch@FreeBSD.org
Subject: Re: Where to find amd64 ABI information for FreeBSD?
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On Wed, 6 Apr 2011, Kostik Belousov wrote:

> On Tue, Apr 05, 2011 at 03:10:37PM -0700, Xin LI wrote:
>> Is there a place to find ABI information for GCC on FreeBSD?
>>  Specifically, I'm looking for which registers has to be preserved
>> across function call?  (Or do we follow System V Application Binary

I've always looked at the source code (mainly i386.h and i386.md).  I
don't know of any better way for i386.

>> Interface AMD64 Architecture Processor Supplement Draft Version 0.99.5?)
>
> The parts of the mentioned document that depend on compiler and
> toolchain, are fully valid for FreeBSD. Our non-compliance is mostly
> in the specified bits of the kernel/usermode interface.

Is it still a de-facto standard only at 0.99.x?  I only have 0.95 from
2005.  I guess little has changed.

Bruce