Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 28 Jan 2003 15:42:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 28 Jan 2003 15:42:29 -0500 Received: from harpo.it.uu.se ([130.238.12.34]:52158 "EHLO harpo.it.uu.se") by vger.kernel.org with ESMTP id ; Tue, 28 Jan 2003 15:42:29 -0500 From: Mikael Pettersson MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15926.60767.451098.218188@harpo.it.uu.se> Date: Tue, 28 Jan 2003 21:51:43 +0100 To: Andi Kleen Cc: linux-kernel@vger.kernel.org, discuss@x86-64.org Subject: Re: two x86_64 fixes for 2.4.21-pre3 In-Reply-To: <20030124193721.GA24876@wotan.suse.de> References: <15921.37163.139583.74988@harpo.it.uu.se> <20030124193721.GA24876@wotan.suse.de> X-Mailer: VM 6.90 under Emacs 20.7.1 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Andi Kleen writes: > On Fri, Jan 24, 2003 at 08:16:59PM +0100, Mikael Pettersson wrote: ... > > sleep[196] general protection rip:4003ebe5 rsp:ffffed20 error:0 > > > > (The system is vanilla RH8.0 with Athlon binaries, running under ... > Works for me on Simics with a SuSE 32bit userland. > > You have to figure out what breaks on RedHat yourself. > > We had some problems with the TLS register used on very new glibcs > (%gs), but they should be fixed now in the codedrop in 2.4.21pre3. It looks as if %gs handling isn't quite right. pthread_setcanceltype() SIGSEGVs in THREAD_SETMEM(self, p_canceltype, type). The instruction that fails is "mov %dl,%gs:0x81", and %gs is zero. RedHat linked /bin/sleep against libpthread.so, which (at least in the glibc-2.2.93 used in RedHat 8.0) causes the nanosleep() system call to be wrapped between a pair of pthread_setcanceltype() calls. That's why /bin/sleep failed. Compile it yourself w/o -lpthread and it works. Also: running gdb on a live process didn't work. I got "int3" errors in the kernel's log, and gdb seemed to hang or loop somewhere. Postmortem debugs of core files worked ok though. /Mikael - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/