From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:39695) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TTKEo-00068r-FM for qemu-devel@nongnu.org; Tue, 30 Oct 2012 18:24:47 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TTKEn-0002vi-GJ for qemu-devel@nongnu.org; Tue, 30 Oct 2012 18:24:46 -0400 Received: from v220110690675601.yourvserver.net ([78.47.199.172]:50845) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TTKEn-0002vO-9B for qemu-devel@nongnu.org; Tue, 30 Oct 2012 18:24:45 -0400 Message-ID: <509053A2.6010504@weilnetz.de> Date: Tue, 30 Oct 2012 23:24:34 +0100 From: Stefan Weil MIME-Version: 1.0 References: <508EC28A.5060706@redhat.com> <20121029182958.GB29866@ohm.aurel32.net> <508F8CBB.8090101@redhat.com> In-Reply-To: <508F8CBB.8090101@redhat.com> Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] 64-on-32 TCG broken List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Paolo Bonzini Cc: qemu-devel , Aurelien Jarno Am 30.10.2012 09:15, schrieb Paolo Bonzini: > Il 29/10/2012 19:29, Aurelien Jarno ha scritto: >> On Mon, Oct 29, 2012 at 06:53:14PM +0100, Paolo Bonzini wrote: >>>> Known-good commit: 8473f377393219390ea6f2d8d450a2b054bb823e >>>> Known-bad commit: d262cb02861dd33375c08fc798930653b14769e9 >>>> >>>> i386-softmmu seems to work. I may try to bisect it tomorrow, but I'd be >>>> glad if somebody else beats me. It can be reproduced with Wine and >>>> "x86_64-softmmu/qemu-system-x86_64.exe -L ../pc-bios"; it hangs at iPXE. >> Oops, sorry about that. Is it win32 or win64? I'll try to fix it asap, >> but right now I don't have a good network connection enough to either >> setup a mingw build environment or to connect to a remote machine with >> such an environment. > > It's win32, and the first bad commit is 9c43b68 (tcg: rework liveness > analysis, 2012-10-09). But it looks like 64-on-32 emulation is more > generally broken. I now tried x86_64-linux-user compiled for 32-bit, > and it segfaults on startup. Even the previous commit cannot run > qemu-x86_64 /bin/ls correctly: > I just tested with latest qemu-system-x86_64 on 32 bit Linux. It also hangs during boot (BIOS), so it looks like this is not a MinGW only problem. Your test with x86_64-linux-user indicates that, too. I also get the problem with TCI. Therefore I expect that any 32 bit TCG target will show it. Regards Stefan W. > $ git whatis HEAD > ec7a869 (tcg: sync output arguments on liveness request, 2012-10-09) > $ x86_64-linux-user/qemu-x86_64 /bin/ls > inux-user > > $ git whatis HEAD > 9c43b68 (tcg: rework liveness analysis, 2012-10-09) > $ x86_64-linux-user/qemu-x86_64 /bin/ls > qemu: uncaught target signal 11 (Segmentation fault) - core dumped > Errore di segmentazione > > > Regarding the win32 failure, it's early enough that the TCG logs give > an idea of what is happening. This *might* be a reduced testcase, > but the general breakage makes it impossible to check: