From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1Lk1Al-0006GV-0p for qemu-devel@nongnu.org; Wed, 18 Mar 2009 15:11:27 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1Lk1Ag-0006FN-Kk for qemu-devel@nongnu.org; Wed, 18 Mar 2009 15:11:26 -0400 Received: from [199.232.76.173] (port=40125 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Lk1Ag-0006FK-Ch for qemu-devel@nongnu.org; Wed, 18 Mar 2009 15:11:22 -0400 Received: from mail-fx0-f169.google.com ([209.85.220.169]:41569) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1Lk1Ae-0007Nd-Jt for qemu-devel@nongnu.org; Wed, 18 Mar 2009 15:11:21 -0400 Received: by fxm17 with SMTP id 17so176865fxm.34 for ; Wed, 18 Mar 2009 12:11:19 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <200903181328.30900.rob@landley.net> References: <200903171857.42875.rob@landley.net> <28469CCD-5C30-4DCF-BA8D-712672FE0A74@suse.de> <200903181328.30900.rob@landley.net> Date: Wed, 18 Mar 2009 21:11:19 +0200 Message-ID: Subject: Re: [Qemu-devel] svn 6658 broke powerpc. From: Blue Swirl Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, The OpenBIOS Mailinglist On 3/18/09, Rob Landley wrote: > On Wednesday 18 March 2009 03:41:05 Alexander Graf wrote: > > On 18.03.2009, at 00:57, Rob Landley wrote: > > > Up through svn 6657, I could boot a powerpc kernel with -kernel. > > > That commit > > > changed it so now it says: > > > invalid/unsupported opcode: 00 - 00 - 00 (00000000) fff18f00 1 > > > invalid/unsupported opcode: 00 - 00 - 00 (00000000) fff18f04 1 > > > invalid/unsupported opcode: 00 - 0c - 06 (00009198) 00009214 0 > > > > > > And dies. > > > > > > You can grab a test kernel from http://landley.net/zImage-powerpc > > > and try > > > booting it (out of the qemu source directory, this is assuming > > > you've built it > > > but haven't installed it yet) via: > > > > > > ppc-softmmu/qemu-system-ppc -kernel zImage-powerpc \ > > > -append "console=ttyS0 panic=1" -nographic -no-reboot -L pc-bios > > > > > > With svn 6657, it works. (You get kernel boot messages up until it > > > panics and > > > dies because it can't find the root filesystem). With 6658 it dies > > > immediately with the above error message. > > > > > > Unfortunately, this means that the 0.10.0 release doesn't work for > > > powerpc for > > > me, but svn a couple days _before_ the release did. > > > > That specific commit shouldn't have changed anything with respect to > > ppc32 emulation. The one where your command broken is the openBIOS > > update. > > > The commit I pointed to is the openbios update, yes. > > > > Please try again without -nographic. > > > It does indeed work without nographic. (It doesn't do anything _useful_ for > me without nographic, since I'm scripting the emulated kernel's behavior > through stdin and stdout, but allowing it to pop up an SDL window does make it > out of openbios and into the kernel.) The kernel makes the equivalent of the following calls to OF interface: finddevice("/") = 0x11d5c finddevice("/chosen") = 0x1197c finddevice("/openprom") = 0x11b3c getprop(0x11b3c, "model", 0x78efeb0, 0x40) = 0xf getprop(0x11d5c, "stdout", 0x78efea0, 0x4) = 0x4 instance-to-path(0x86ea0, 0x12ad0dc, 0xff) where it crashes because memmove overwrites all memory. But where does this 0x86ea0 come from?