Re: [Qemu-ppc] Booting Lubuntu 16.04 on qemu-system-ppc produces errors

[Mark Cave-Ayland]

On 10/07/2019 04:40, Andrew Randrianasulu wrote:

> В сообщении от Tuesday 09 July 2019 19:27:30 BALATON Zoltan написал(а):
>> On Tue, 9 Jul 2019, Andrew Randrianasulu wrote:
>>> (gdb) run qemu-system-ppc -M mac99,via=pmu -L ../queue-vga/pc-bios -cdrom 
>>> /mnt/sdb1/PPC-img/lubuntu-16.04-desktop-powerpc.iso -m 512  -display 
>>> sdl,gl=on -vga std -d guest_errors,unimp -boot d -cpu G4 -g 1024x768x24 
>>> -device ES1370
>>> Starting program: /dev/shm/qemu/ppc-softmmu/qemu-system-ppc qemu-system-ppc 
>>> -M mac99,via=pmu -L ../queue-vga/pc-bios -cdrom 
>>> /mnt/sdb1/PPC-img/lubuntu-16.04-desktop-powerpc.iso -m 512  -display 
>>> sdl,gl=on -vga std -d guest_errors,unimp -boot d -cpu G4 -g 1024x768x24 
>>> -device ES1370
>>> [Thread debugging using libthread_db enabled]
>>> Using host libthread_db library "/lib/libthread_db.so.1".
>>> [New Thread 0xf560cb40 (LWP 19193)]
>>> qemu-system-ppc: qemu-system-ppc: Could not open 'qemu-system-ppc': No such 
>>> file or directory
>>> [Thread 0xf560cb40 (LWP 19193) exited]
>>> [Inferior 1 (process 19189) exited with code 01]
>>> (gdb) run  -M mac99,via=pmu -L ../queue-vga/pc-bios -cdrom 
>>> /mnt/sdb1/PPC-img/lubuntu-16.04-desktop-powerpc.iso -m 512  -display 
>>> sdl,gl=on -vga std -d guest_errors,unimp -boot d -cpu G4 -g 1024x768x24 
>>> -device ES1370
>>> Starting program: /dev/shm/qemu/ppc-softmmu/qemu-system-ppc -M 
>>> mac99,via=pmu -L ../queue-vga/pc-bios -cdrom 
>>> /mnt/sdb1/PPC-img/lubuntu-16.04-desktop-powerpc.iso -m 512  -display 
>>> sdl,gl=on -vga std -d guest_errors,unimp -boot d -cpu G4 -g 1024x768x24 
>>> -device ES1370
>>> [Thread debugging using libthread_db enabled]
>>> Using host libthread_db library "/lib/libthread_db.so.1".
>>> [New Thread 0xf560cb40 (LWP 19200)]
>>> [New Thread 0xf4c1ab40 (LWP 19201)]
>>> [New Thread 0xec1b7b40 (LWP 19202)]
>>> [New Thread 0xc5962b40 (LWP 19204)]
>>> [Thread 0xf4c1ab40 (LWP 19201) exited]
>>> [New Thread 0xf4c1ab40 (LWP 19219)]
>>>
>>> Thread 4 "qemu-system-ppc" received signal SIGSEGV, Segmentation fault.
>>> [Switching to Thread 0xec1b7b40 (LWP 19202)]
>>> 0xf290e844 in code_gen_buffer ()
>>> (gdb) bt full
>>> #0  0xffffffff in code_gen_buffer ()
>>> #1  0x567054ee in cpu_exec (itb=<optimized out>, cpu=<optimized out>) at 
>>> /dev/shm/qemu/accel/tcg/cpu-exec.c:173
>>
>> This seems to crash in TCG which I don't know how to debug and looks not 
>> related to any of my patches. Hopefully someone on the list can help. I 
>> wonder if this is related to recent AltiVec optimisations that went on for 
>> the last two releases. Maybe you could try earlier release (4.0.0 and 
>> 3.1.0) and if that works could try to bisect (although since there were 
>> some bugs in previous versions things might fail differently or not work 
>> with those versions so this may make bisecting difficult).
> 
> I think this is one of those 32-bit only crashes, because I booted same iso 
> with 64-bit qemu without crash ...
> Will try bisect later.

Richard's latest TCG queue was only merged yesterday, plus you may find this 
patch
related too: 
https://lists.gnu.org/archive/html/qemu-devel/2019-07/msg02243.html.


ATB,

Mark.