From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:39261) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TTbjw-0001NI-NE for qemu-devel@nongnu.org; Wed, 31 Oct 2012 13:06:08 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TTbjs-0001Q0-9D for qemu-devel@nongnu.org; Wed, 31 Oct 2012 13:06:04 -0400 Received: from v220110690675601.yourvserver.net ([78.47.199.172]:51768) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TTbjs-0001PS-2i for qemu-devel@nongnu.org; Wed, 31 Oct 2012 13:06:00 -0400 Message-ID: <50915A75.9020404@weilnetz.de> Date: Wed, 31 Oct 2012 18:05:57 +0100 From: Stefan Weil MIME-Version: 1.0 References: <508EC28A.5060706@redhat.com> <20121029182958.GB29866@ohm.aurel32.net> <508F8CBB.8090101@redhat.com> <509053A2.6010504@weilnetz.de> <20121030235636.GB32197@hall.aurel32.net> In-Reply-To: <20121030235636.GB32197@hall.aurel32.net> 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: Aurelien Jarno Cc: Paolo Bonzini , qemu-devel Am 31.10.2012 00:56, schrieb Aurelien Jarno: > On Tue, Oct 30, 2012 at 11:24:34PM +0100, Stefan Weil wrote: >> 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. >> > It ended up to be a merge issue. The newly added special cases > for half-dead operations also need to be changed with the liveness > analysis rework. > > The attached patch fixes the issue on a 32-bit linux host. I haven't > tried win32 yet, maybe someone will beat me. Tested-by: Stefan Weil Your attached patch fixes the problem seen with qemu-system-x86_64 on 32 bit Linux and with 32 bit Windows. I think you can commit it to git master. Merci, Stefan