Messages in this thread | | | Date | Wed, 5 Mar 2008 15:16:43 -0800 | From | Joe Buck <> | Subject | Re: RELEASE BLOCKER: Linux doesn't follow x86/x86-64 ABI wrt direction flag |
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On Wed, Mar 05, 2008 at 03:10:12PM -0800, David Miller wrote: > From: Michael Matz <matz@suse.de> > Date: Thu, 6 Mar 2008 00:07:39 +0100 (CET) > > > The fix lies in the kernel, the work-around in gcc. > > This depends upon how you interpret this ABI situation. > > There is at least some agreement that how things have > actually been implemented by these kernels for more > than 15 years trumps whatever a paper standard states.
We had a similar argument about the undefinedness of signed int overflow. That's what the standard says, yet code that assumes otherwise is pervasive, including in gcc itself.
If a standard is widely violated in a very consistent way, the violation in effect becomes standard.
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