From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52143) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bDrfw-0005td-0j for qemu-devel@nongnu.org; Fri, 17 Jun 2016 07:11:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bDrfq-0003g8-Ul for qemu-devel@nongnu.org; Fri, 17 Jun 2016 07:10:58 -0400 Received: from indium.canonical.com ([91.189.90.7]:45142) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bDrfq-0003g4-Oj for qemu-devel@nongnu.org; Fri, 17 Jun 2016 07:10:54 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.76 #1 (Debian)) id 1bDrfq-0000KK-6a for ; Fri, 17 Jun 2016 11:10:54 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 23A652E80C3 for ; Fri, 17 Jun 2016 11:10:54 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Fri, 17 Jun 2016 11:05:02 -0000 From: Peter Maydell Reply-To: Bug 1591611 <1591611@bugs.launchpad.net> Sender: bounces@canonical.com References: <20160612061620.2663.17249.malonedeb@chaenomeles.canonical.com> Message-Id: <20160617110502.12349.35931.malone@wampee.canonical.com> Errors-To: bounces@canonical.com Subject: [Qemu-devel] [Bug 1591611] Re: chroot using qemu-x86_64-static fails on ppc64el List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org No, put_user_u32() is correct and __put_user() would be wrong. child_tidptr is a value passed directly from the guest in a register, so it is a guest pointer, not a host pointer. -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1591611 Title: chroot using qemu-x86_64-static fails on ppc64el Status in QEMU: New Bug description: When attempting to use qemu-x86_64-static from qemu 2.5.0 on a ppc64el host to chroot into an amd64 environment, all commands fail with an assertion error. /usr/bin/qemu-x86_64-static from the host was copied into the chroot /usr/bin, and the host has multiformat support in the kernel. Sample output illustrating the problem, as well as bash builtins working: # chroot /virtualbox/scratchdisks_local_001/amd64_chroot qemu-x86_64-stat= ic /bin/bash # ls bash: ../sysdeps/nptl/fork.c:136: __libc_fork: Assertion `({ __typeof (se= lf->tid) __value; if (sizeof (__value) =3D=3D 1) asm volatile ("movb %%fs:%= P2,%b0" : "=3Dq" (__value) : "0" (0), "i" (__builtin_offsetof (struct pthre= ad, tid))); else if (sizeof (__value) =3D=3D 4) asm volatile ("movl %%fs:%P= 1,%0" : "=3Dr" (__value) : "i" (__builtin_offsetof (struct pthread, tid)));= else { if (sizeof (__value) !=3D 8) abort (); asm volatile ("movq %%fs:%P1= ,%q0" : "=3Dr" (__value) : "i" (__builtin_offsetof (struct pthread, tid)));= } __value; }) !=3D ppid' failed. setup_frame: not implemented setup_frame: not implemented qemu: uncaught target signal 11 (Segmentation fault) - core dumped Segmentation fault setup_frame: not implemented setup_frame: not implemented # echo TEST TEST # cat test bash: ../sysdeps/nptl/fork.c:136: __libc_fork: Assertion `({ __typeof (se= lf->tid) __value; if (sizeof (__value) =3D=3D 1) asm volatile ("movb %%fs:%= P2,%b0" : "=3Dq" (__value) : "0" (0), "i" (__builtin_offsetof (struct pthre= ad, tid))); else if (sizeof (__value) =3D=3D 4) asm volatile ("movl %%fs:%P= 1,%0" : "=3Dr" (__value) : "i" (__builtin_offsetof (struct pthread, tid)));= else { if (sizeof (__value) !=3D 8) abort (); asm volatile ("movq %%fs:%P1= ,%q0" : "=3Dr" (__value) : "i" (__builtin_offsetof (struct pthread, tid)));= } __value; }) !=3D ppid' failed. qemu: uncaught target signal 11 (Segmentation fault) - core dumped Segmentation fault It is currently unknown if other host architectures (e.g. aarch64) are also affected. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1591611/+subscriptions