RE : [XenARM] android emulator

[ROSSIER Daniel <Daniel.Rossier@xxxxxxxxxx>]

Well, actually we do not have any document, but the code we touched is pretty 
well commented ;-)
The image is working on both QEMU-ARM Mainstone and "real" PXA270/Colibri 
machine.

The toolchain we are currently using is linux-gnu-eabi although we do not have 
any support for AEABI yet.

- Daniel
________________________________________
De : Michael R. Hines [michael@xxxxxxxxxxxx]
Date d'envoi : mardi 20 octobre 2009 18:49
À : ROSSIER Daniel
Cc : sbuk.suh@xxxxxxxxxxx; Caz Yokoyama; xen-arm@xxxxxxxxxxxxxxxxxxx
Objet : Re: [XenARM] android emulator

Is there any documentation for this?

Such as which ARM family? Your test environment? (what kind of board / QEMU 
setup, etc) Preferred ARM compiler?

- Michael

ROSSIER Daniel wrote:

Hi everyone,

I've just went through the last emails and am also happy to see some 
resurrection on this mailing list.
The EmbeddedXEN project (https://sourceforge.net/projects/embeddedxen/)  is 
going ahead from a couple of months with near
daily updates on git repository. We have now a running version including both 
XEN and paravirt dom0-linux (2.6.18).

We are about to get a running version of the Xenomai extension on the 
hypervisor (for hard realtime support) as well, but it still requires some 
efforts.
We still have some problems occasionally with some loose of timer/serial 
interrupts from the hypervisor, but we are investigating.

Now, we are also working out a clean separation of guest domains with the 
hypervisor.

Anyway, I just mention again two of my mails dated from last Sept.3 on this 
mailing list regarding page_type and mapcache issues for which I've never
got any answer. We have made a workaround for these two issues to figure out 
the problem; it seems to be quite stable now.

Daniel




-----Original Message-----
From: 
xen-arm-bounces@xxxxxxxxxxxxxxxxxxx<mailto:xen-arm-bounces@xxxxxxxxxxxxxxxxxxx> 
[mailto:xen-arm-
bounces@xxxxxxxxxxxxxxxxxxx<mailto:bounces@xxxxxxxxxxxxxxxxxxx>] On Behalf Of 
Sang-bum Suh
Sent: mardi, 20. octobre 2009 03:29
To: Caz Yokoyama
Cc: xen-arm@xxxxxxxxxxxxxxxxxxx<mailto:xen-arm@xxxxxxxxxxxxxxxxxxx>
Subject: Re: RE: Re: [XenARM] android emulator

Hi,

Thanks but, I cannot use a public server during a development stage of
Linux stuffs according to a company policy where I work.

I have a plan to release of Linux kernel at the Xen ARM home page in
the public domain once it is para-virtualized as you can see it in the
Xen ARM home page.

In the future, I hope anyone who works for the sorceforge based ARM
hypervisor project where you are involved will submit code to the Xen
ARM project.

Thanks,

Sang-bum





------- Original Message -------
Sender : Caz Yokoyama<cazyokoyama@xxxxxxxxx><mailto:cazyokoyama@xxxxxxxxx>
Date   : 2009-10-20 09:45 (GMT+09:00)
Title  : RE: Re: [XenARM] android emulator

Hello Sang-bum,
It is nice to hear from the person who is behind xen-arm. Do you have a
plan to add public read-only access to your 2.6.27 source code
repository? I am interested in your progress. If your repository is
inside of firewall, there are a lot of free public servers. I am using
sourceforge.net. You can use cvs or svn in sourceforge.net. github.com
is another one for git.
-caz

-----Original Message-----
From: Sang-bum Suh [mailto:sbuk.suh@xxxxxxxxxxx]
Sent: Monday, October 19, 2009 5:24 PM
To: Michael R. Hines; Caz Yokoyama
Cc: xen-arm@xxxxxxxxxxxxxxxxxxx<mailto:xen-arm@xxxxxxxxxxxxxxxxxxx>
Subject: Re: Re: [XenARM] android emulator

Hi,

Excellent !

The released para-virtualized Linux 2.6.21 kernel for the Xen ARM
project would run on the Xen ARM on Android emulator.
However, you may need a patch to run an Android platform on Linux
kernel
2.6.21 and port device drivers
to Android emulator, as there is a problem with Linux kernel version
and Android platform.

Try and download vanila Linux kernel and then update it with Para-virt
Linux files of the package at http://wiki.xensource.com/xenwiki/XenARM.
For more details, please refer to section 2.2.2. of the Secure Xen on
ARM user's guide at the web page.

FYI, I can release para-virtualized Linux kernel 2.6.27 next year of
which Linux kernel version does not need such Android patch.

Thanks,

Sang-bum





------- Original Message -------
Sender : Michael R. Hines<michael@xxxxxxxxxxxx><mailto:michael@xxxxxxxxxxxx>
Date   : 2009-10-20 08:19 (GMT+09:00)
Title  : Re: [XenARM] android emulator

Actually, I got it to work. The problem was that that I was compiling
on a 64-bit version of the ARM-ported emulator instead of a 32-bit
version, so I logged into a 32-bit machine and attempted to compile it.

However, there was one snag before it worked: a patch is needed:

--- Taken from http://code.google.com/p/android/issues/detail?id=838

1.) A -msse2 cflags is missing in Makefile.target which make
_mm_add_si64 cannot be found:
/android-emulator-20080826/qemu/skins/skin_argb.h:286: warning:
implicit declaration of function '_mm_add_si64'
/android-emulator-20080826/qemu/skins/skin_argb.h:286: error:
incompatible types in assignment

2.) The error comment in build-emulator.sh is wrong.

Patch:
--- qemu.orig/Makefile.target   2008-08-29 10:01:41.000000000 +0800
+++ qemu/Makefile.target        2008-08-29 10:01:24.000000000 +0800
@@ -39,7 +39,7 @@ endif

 ifeq ($(ARCH),i386)
 OP_CFLAGS=$(CFLAGS) -O2 -fomit-frame-pointer
-CFLAGS+=-DUSE_MMX -mmmx
+CFLAGS+=-DUSE_MMX -mmmx -msse2
 ifneq ($(CONFIG_DARWIN),yes)
 OP_CFLAGS+= -mpreferred-stack-boundary=2  else


Once I applied this on a 32-bit Ubuntu 9.04 server box, the compile
succeeded and the two mini-os domains started running inside the
emulator.

Cool stuff! Thank you very much for your quick response.

What is the possibility of getting a full linux-2.6.21-arm running
inside the emulator?

Is that possible right now?

- Michael

Caz Yokoyama wrote:


Hello Michael,
What optimization option do you use? -O2? -O0? Don't use -O0. You


will
have


segfault. Could you run backtrace command on segfault? In addition,
please provide more detail of your environment.
-caz
P.S. You may not hear from anybody other than me. This is a very


quiet


mailing list.

-----Original Message-----
From: 
xen-arm-bounces@xxxxxxxxxxxxxxxxxxx<mailto:xen-arm-bounces@xxxxxxxxxxxxxxxxxxx>
[mailto:xen-arm-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Michael R.
Hines
Sent: Monday, October 19, 2009 12:58 PM
To: xen-arm@xxxxxxxxxxxxxxxxxxx<mailto:xen-arm@xxxxxxxxxxxxxxxxxxx>
Subject: [XenARM] android emulator

Greetings,

I have followed all the instructions in the Secure XenARM manual and


I


went through section A.2 on how to build XenARM for the Android
emulator. I successfully built the arm-port of Xen as well as the
arm-port of mini-os and I built the patched version of QEMU 0.82.

When I tried to run the emulator, I get a segfault - From what I can
tell, the fault occurs at the very first instruction when QEMU
attempts to start running the Xen hypervisor.

Here is the output of a sample GDB session:

$ gdb emulator
$ (gdb) run -guest0 0x01c00000 mini-os.elf -guest1 0x02c00000
mini-os.elf -show-kernel -system ./images -shell -qemu -s Starting
program: ../android-emulator-xen_arm/emulator -guest0 0x01c00000
mini-os.elf -guest1 0x02c00000 mini-os.elf -show-kernel -system
./images  -shell -qemu -s [Thread debugging using libthread_db
enabled] guest0 - mini-os.elf
guest1 - mini-os.elf
[New Thread 0x7f32a807c6f0 (LWP 5913)] [New Thread 0x7f329e9f0950


(LWP


5916)] [New Thread 0x7f329e1ef950 (LWP 5917)] Waiting gdb connection
on port 1234

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7f32a807c6f0 (LWP 5913)] 0x0000000000000000 in
?? ()
(gdb)


Any ideas on where I could start debugging this? Or are there updated
patches to make this work?




--
/*
 * Michael R. Hines
 * Post-Doc, Dept. of Computer Science
 * http://www.cs.columbia.edu/~mhines/
 * Live long and prosper...
 */



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--
/*
 * Michael R. Hines
 * Post-Doc, Dept. of Computer Science
 * http://www.cs.columbia.edu/~mhines/
 * Live long and prosper...
 */



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