Date: Mon, 24 Jul 2006 12:49:25 -0400 (EDT) From: Daniel Eischen <deischen@freebsd.org> To: Tijl Coosemans <tijl@ulyssis.org> Cc: freebsd-hackers@freebsd.org, freebsd-emulation@freebsd.org, Michael Nottebrock <lofi@freebsd.org> Subject: Re: WINE vs. FreeBSD Message-ID: <Pine.GSO.4.64.0607241247110.14045@sea.ntplx.net> In-Reply-To: <200607241839.28229.tijl@ulyssis.org> References: <200607221914.15826.lofi@freebsd.org> <200607241706.08396.tijl@ulyssis.org> <Pine.GSO.4.64.0607241136160.13746@sea.ntplx.net> <200607241839.28229.tijl@ulyssis.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Mon, 24 Jul 2006, Tijl Coosemans wrote: > On Monday 24 July 2006 17:39, Daniel Eischen wrote: >> On Mon, 24 Jul 2006, Tijl Coosemans wrote: >>> I've attached two patches that accomplish this, but this seems to >>> trigger other problems, so use at your own risk. If you want to try >>> them, place them in the port's files/ directory and add a line >>> containing "USE_AUTOTOOLS= autoconf:259" to the Makefile. This >>> seems to break wine+libpthread, so I've also changed the port to >>> use libthr instead. >>> >>> For the libpthread experts, I haven't investigated that much >>> further yet, but libpthread seems to fail in create_stack() from >>> _pthread_create() from _thr_start_sig_daemon(). >> >> See my response to this in a previous reply to this thread. libthr >> and libpthread use LDT's for TLS. WINE is stomping on them because >> it doesn't properly create LDTs. This is not a problem with either >> of the thread libraries and this issue has been known ever since we >> implemented TLS years ago. > > And as I stated later on in that thread, I don't see where libpthread > and libthr still use LDT entries. As far as I understand the code, > instead of using an LDT entry per thread (as it sure used to be), only > one single GDT entry is used whose base address is updated during a > context switch. Looking at the cvs history, it has been working like > this since a couple commits of Peter Wemm about a year ago. > > And if nothing but Wine uses the LDT, Wine's static allocation of LDT > entries can't be the problem. Look, we use %gs for TLS, period. Go see libpthread/arch/i386/i386/pthread_md.c for how libpthread does it. TLS would not work without setting aside a register for the threads library (and rtld) to use. -- DE
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.GSO.4.64.0607241247110.14045>