From: Paolo Bonzini <pbonzini@redhat.com>
To: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Cc: Gleb Natapov <gleb@redhat.com>, kvm@vger.kernel.org
Subject: Re: regression in v3.9? a guest stuck in BIOS if emulate_invalid_guest_state=Y
Date: Wed, 08 May 2013 10:29:57 +0200 [thread overview]
Message-ID: <518A0D05.9040207@redhat.com> (raw)
In-Reply-To: <5189FFEB.9000503@ce.jp.nec.com>
Il 08/05/2013 09:34, Jun'ichi Nomura ha scritto:
> On 05/08/13 12:22, Jun'ichi Nomura wrote:
>>> Il 07/05/2013 14:06, Gleb Natapov ha scritto:
>>>> What is the output of "virsh qemu-monitor-command vm12 --hmp x/i $pc"
>>>> when it hangs?
>>
>> # virsh qemu-monitor-command vm12 --hmp x/4i \$pc
>> 0x00000000000c06ca: aam $0xa
>> 0x00000000000c06cc: mov %ax,%bx
>> 0x00000000000c06ce: mov %bh,%al
>> 0x00000000000c06d0: aam $0xa
>>
>> # virsh qemu-monitor-command vm12 --hmp x/8b \$pc
>> 00000000000c06ca: 0xd4 0x0a 0x89 0xc3 0x88 0xf8 0xd4 0x0a
>>
>> (qemu) x/8b $pc
>> x/8b $pc
>> 00000000000c0564: 0xd7 0x1f 0x24 0x7f 0x88 0xc4 0x88 0xd0
>> (qemu)
>> (qemu) x/i $pc
>> x/i $pc
>> 0x00000000000c0564: xlat %ds:(%bx)
Both of these sequences are found in sgabios. The second goes on as
follows:
popw %ds
andb $0x7f, %al
movb %al, %ah
movb %dl, %al
Thanks for the report!
Paolo
next prev parent reply other threads:[~2013-05-08 8:30 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-07 9:55 regression in v3.9? a guest stuck in BIOS if emulate_invalid_guest_state=Y Jun'ichi Nomura
2013-05-07 10:35 ` Gleb Natapov
2013-05-07 11:05 ` Jun'ichi Nomura
2013-05-07 12:06 ` Gleb Natapov
2013-05-07 14:46 ` Paolo Bonzini
2013-05-07 15:04 ` Gleb Natapov
2013-05-07 16:11 ` Paolo Bonzini
2013-05-08 3:22 ` Jun'ichi Nomura
2013-05-08 7:34 ` Jun'ichi Nomura
2013-05-08 8:29 ` Paolo Bonzini [this message]
2013-05-10 2:51 ` Jun'ichi Nomura
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