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From: | Bastian Koppelmann |
Subject: | Re: [Qemu-devel] qemu-system-ppc TCG assert with git master |
Date: | Thu, 12 Mar 2015 16:51:24 +0000 |
User-agent: | Mozilla/5.0 (X11; Linux i686; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 |
On 03/12/2015 03:41 PM, Richard Henderson wrote:
On 03/12/2015 01:41 AM, Mark Cave-Ayland wrote:Whilst testing git master in preparation for some OpenBIOS updates, I'm seeing the following TCG assert in one of my older test images: $ gdb --args ./qemu-system-ppc -cdrom /home/build/src/qemu/image/ppc/ubuntu-5.10-live-powerpc.iso -boot d -g 800x600x8Older, eh? I can only find 5.04. ;-) And, fwiw, that doesn't assert. I get all the way to Kernel panic - not syncing: VFS: unable to mount root fs on unknown-block(1,0) So, I guess I need something different to http://cdimage.ubuntu.com/ubuntu-mate/daily-live/current/vivid-desktop-powerpc.iso to reproduce this. r~
Hi Richard,I can reproduce it fine here with http://old-releases.ubuntu.com/releases/5.10/. As far as I see it, the Instruction at 0xc9105830 generates a mov 0 to r30, which is optimized by tcg_opt_gen_mov and r30 is set to TCG_TEMP_CONST. When 0xc9105838 or r0, r30, r30 should be optimized r30 is already in the state TCG_TEMP_CONST and the assert fails.
Cheers, Bastian
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