Messages in this thread | | | Date | Fri, 23 May 2008 14:11:54 +0200 | From | Andi Kleen <> | Subject | Re: [RFC] x86: xsave/xrstor support, ucontext_t extensions |
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On Fri, May 23, 2008 at 01:46:25PM +0200, Mikael Pettersson wrote: > H. Peter Anvin writes: > > Michael, you wrote: > > > > > Hmm, right now it seems this field has a de-facto ABI of being > > > either 0xffff (plain) or 0x0000 (fxsr). Using other values would > > > confuse at least one application I know of. Sad. > > > > ... could you share what application that is? This otherwise would be > > ideal. > > It's the virtual machine for the Erlang/OTP concurrent functional > language. It's open-source and used extensively for telecom and > internet server applications.
I had a few reports over the years of other applications ddoing very weird specific things with the sigframe. So I agree it's fairly important to be as compatible here as possible.
-Andi
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