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[Qemu-devel] qemu-system-x86_64 bugs

From: Constantine Kousoulos
Subject: [Qemu-devel] qemu-system-x86_64 bugs
Date: Fri, 29 Jun 2007 16:27:50 +0300
User-agent: Mozilla-Thunderbird (X11/20070621)


I have qemu-0.9.0 (installed via deb package) on debian-amd64 unstable
on a turion64 hp notebook.

I have detected the following bugs when using the command
"qemu-system-x86_64 -hda /dev/hda":

1) I use grub-0.97 to boot my system. Qemu (meaning the above command)
always boots the same image although it may have changed between two
uses of qemu. For example, if i use qemu and grub has the following
options at boot time


i choose MyOS1 the first time. I close qemu, modify and rebuild MyOS1,
then call qemu again. When i choose MyOS1, qemu will run the os image it
run the first time and not the new image. This will repeat until i
reboot my system.

2) When i use the monitor, qemu refuses to print 64-bit registers rax,
rbx, rsp, etc. The command "info registers" does not show any of the
above registers. The command "p $rax" produces the message "unknown
register". In addition, it doesn't print either the 32-bit registers
eax. ebx, esp, etc when using the command "info registers". However it
does print the previously mentioned regs when the command "p $e**" is
used. Regs e** seem to represent regs r** because the former can
"contain" 64-bit values. In one of my test kernels, i did a "movq
$0xffffffffff, %rdi" and from within qemu "p $edi" produced 0xffffffffff.


PS I'm not registered to this list so please cc me to your replies.

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