Date: Mon, 3 Apr 2000 08:17:46 +0200 From: Martin Cracauer <cracauer@cons.org> To: Andre Albsmeier <andre.albsmeier@mchp.siemens.de> Cc: Martin Cracauer <cracauer@cons.org>, "Sean O'Connell" <sean@stat.Duke.EDU>, Andrew Gallatin <gallatin@cs.duke.edu>, FreeBSD emulation <freebsd-emulation@FreeBSD.ORG>, marcel@FreeBSD.ORG Subject: Re: linux_base 6.1 may work now Message-ID: <20000403081745.A4136@cons.org> In-Reply-To: <20000402145454.A64658@internal>; from andre.albsmeier@mchp.siemens.de on Sun, Apr 02, 2000 at 02:54:54PM %2B0200 References: <14538.64168.213977.432746@grasshopper.cs.duke.edu> <20000311235754.A5556@stat.Duke.EDU> <20000312154020.A486@internal> <20000313083137.A25830@cons.org> <20000402145454.A64658@internal>
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In <20000402145454.A64658@internal>, Andre Albsmeier wrote: > On Mon, 13-Mar-2000 at 08:31:38 +0100, Martin Cracauer wrote: > > > > > There was a commit yesterday which may have fixed the linux problem. > > > > > I don't have an x86 handy to play with -- can you see if it makes > > > > > splus et al run with linux_base 6.1? > > > > [my commit] > > > > > Change the default FPU control word so that exceptions for new > > > > > processes are now masked until set by fpsetmask(3). > > > > > > > > Confirmed for -STABLE with acroread 4.05! > > > > Folks, > > > > I am surprised that this affected the Linux emulator. > > > > Emulators should set the default FPU control word to what the native > > kernel would, they should not inherit this value from the one that > > FreeBSD assigns to its native processes. > > > > Although FreeBSD-4.0 now defaults to what Linux and Solaris expect, > > this should be fixed in the Linux and Solaris emulators. Because the > > FreeBSD control word may still be set to the old value by users and/or > > a dynamic scheme for FreeBSD processes may be implemented. > > > > Is a person who feels responsible for the svr4 emulator on the CC: list > > of this message? > > I would like to raise this subject again. Would it be any problem > to commit the changes to sys/i386/include/npx.h to 3-STABLE as well? > I have tried there and it makes acroread 4.05 work... I'm surprised the emulator maintainers didn't respond to this... I don't plan to change the default FPU control word in the 3.x branch, because it is a too surprising behaviour change for a -STABLE and 3.x is dead anyway (the latter implies that I am just killing my last 3.x machine I could test this on). I don't think the other FPU-interestedt people think different. The matter is also a bit more complicated for the Linux emulator since different versions of libc/kernel combinations do different FPU cw initialization. Martin -- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Martin Cracauer <cracauer@cons.org> http://www.cons.org/cracauer/ Tel.: (private) +4940 5221829 Fax.: (private) +4940 5228536 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-emulation" in the body of the message
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