Date: Mon, 7 May 2001 17:13:52 +1000 (EST) From: Bruce Evans <bde@zeta.org.au> To: Daniel Eischen <eischen@vigrid.com> Cc: Andrew Gallatin <gallatin@cs.duke.edu>, current@FreeBSD.ORG Subject: Re: Rfork'd threads, signals, and LDTs Message-ID: <Pine.BSF.4.21.0105071657210.84927-100000@besplex.bde.org> In-Reply-To: <Pine.SUN.3.91.1010505143128.15821A-100000@pcnet1.pcnet.com>
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On Sat, 5 May 2001, Daniel Eischen wrote: > On Sat, 5 May 2001, Andrew Gallatin wrote: > > > > Daniel Eischen writes: > > > > > > OK, thanks. Here's my guess at what should be changed for the Linux > > > emulator. If this looks correct, I'll commit it. > > > > > > Hmm, I wonder how linuxthreads works under FreeBSD without this > > > change... > > > > This breaks at least one version of the IBM JDK that I have > > laying around.. > > > > If anything, we may have two errors (at least partially) canceling > > each other out. I think it needs more work/thought prior to > > committing. > > We're still OK with the change to FreeBSDs native signal trampoline > though, right? I'll hold off on the Linux emulator changes until > we can figure out what the problem is. I was confused about what Linux does. Now I think it only copies %fs to the signal context struct. It loads %fs with USER_DS for the signal handler. It passes the previous (process) value of %gs to the signal handler. (Its early mistake of of switching %fs on every entry to the kernel was moved to FreeBSD.) Bruce To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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