[Qemu-devel] adaptation of emu
hi All, would anyone be interested to adapt qemu to show some information visually as the operating system on top runs? The run must be completely emulated. of coursed I don't expect it for free. regards, dacian On Tuesday, 14 January 2014, 15:34, Herbei Dacian dacian_her...@yahoo.fr wrote: Hi Lluis, thank you. Do you know in what state is. compilable, running, testing? best wishes, dacian On Tuesday, 14 January 2014, 14:42, Lluís Vilanova vilan...@ac.upc.edu wrote: Herbei Dacian dacian_her...@yahoo.fr wrote: Hi, I would like to implement a hardware that is able to keep track of memory accesses as the code gets executed. I'm not interested in the speed of execution this can be as slow as it can get but I have to be able to read from where each instruction in the memory is loaded how many bytes, if it reads what is the address and how many bytes and if it writes the address or register and how many bytes. Is this possible to implement in qemu? I suppose this could work for you: https://projects.gso.ac.upc.edu/projects/qemu-dbi/wiki Lluis -- And it's much the same thing with knowledge, for whenever you learn something new, the whole world becomes that much richer. -- The Princess of Pure Reason, as told by Norton Juster in The Phantom Tollbooth
[Qemu-devel] edit qemu with eclipse
Hi, Is there any way to edit qemu sources as eclipse projects? I could also edit in another IDE but I'm familiar only with eclipse. Any suggestions? best regards, dacian
Re: [Qemu-devel] edit qemu with eclipse
thank you Stefan! On Thursday, 16 January 2014, 7:39, Stefan Hajnoczi stefa...@gmail.com wrote: On Wed, Jan 15, 2014 at 10:17:52PM +, Herbei Dacian wrote: Is there any way to edit qemu sources as eclipse projects? I could also edit in another IDE but I'm familiar only with eclipse. I'm sure it's possible but most developers use the shell (bash, zsh, etc) and text editor (vim, emacs, etc) of their choice instead. I don't use Eclipse but in general: 1. Run cd qemu ./configure from a shell to prepare for building QEMU 2. Import the QEMU source tree into Eclipse so the .c and .h files are in your project. Now you can browse/edit the code. 3. Configure the project build settings to invoke make. Don't try to use the IDE's build support because QEMU has a custom build system and it probably won't work. You may also be able to set up git integration in the IDE but I don't know how that works. Stefan
[Qemu-devel] multiple chip simulation
Hi, I would like to implement a hardware that is able to keep track of memory accesses as the code gets executed. I'm not interested in the speed of execution this can be as slow as it can get but I have to be able to read from where each instruction in the memory is loaded how many bytes, if it reads what is the address and how many bytes and if it writes the address or register and how many bytes. Is this possible to implement in qemu? best regards, dacian
Re: [Qemu-devel] multiple chip simulation
thank you Antony! dacian On Tuesday, 14 January 2014, 10:29, Antony Pavlov antonynpav...@gmail.com wrote: On Tue, 14 Jan 2014 09:20:04 + (GMT) Herbei Dacian dacian_her...@yahoo.fr wrote: Hi, I would like to implement a hardware that is able to keep track of memory accesses as the code gets executed. I'm not interested in the speed of execution this can be as slow as it can get but I have to be able to read from where each instruction in the memory is loaded how many bytes, if it reads what is the address and how many bytes and if it writes the address or register and how many bytes. Is this possible to implement in qemu? See this very experimental work: http://lists.nongnu.org/archive/html/qemu-devel/2014-01/msg00923.html -- Best regards, Antony Pavlov
Re: [Qemu-devel] multiple chip simulation
Hi Lluis, thank you. Do you know in what state is. compilable, running, testing? best wishes, dacian On Tuesday, 14 January 2014, 14:42, Lluís Vilanova vilan...@ac.upc.edu wrote: Herbei Dacian dacian_her...@yahoo.fr wrote: Hi, I would like to implement a hardware that is able to keep track of memory accesses as the code gets executed. I'm not interested in the speed of execution this can be as slow as it can get but I have to be able to read from where each instruction in the memory is loaded how many bytes, if it reads what is the address and how many bytes and if it writes the address or register and how many bytes. Is this possible to implement in qemu? I suppose this could work for you: https://projects.gso.ac.upc.edu/projects/qemu-dbi/wiki Lluis -- And it's much the same thing with knowledge, for whenever you learn something new, the whole world becomes that much richer. -- The Princess of Pure Reason, as told by Norton Juster in The Phantom Tollbooth
Re: [Qemu-devel] minimal linux distribution for qemu
good to know. I was working back in 2005-2006 with a company that had a 4MB kernel. At that time I was too inexperienced to work at that level but I thought now I could reproduce their work with some help. Anyhow for the moment I'll go for 256 MB of ram board just so that I don't worry too much about things that are not yet relevant for me. But thanks again for the warning. But since you helped me soo much I have another question. Is it fisible to change the emulator so that I may visualize the following aspects: _ address of the currently executed instruction from the guest system _ if this instruction is a form of jump like call return conditional jump. _ the address or range of addresses read by this instruction _ the address or range of addresses written by this instruction I read some things about the emulator and if I understood it correctly the emulator breaks the instructions of the gurest platform in micro ops which are then executed on the host operation system. So I'm asking the question above in the idea that maybe there is also somekind of reordering of these micro instructions. best regards, dacian From: Rob Landley r...@landley.net To: Herbei Dacian dacian_her...@yahoo.fr Cc: Peter Maydell peter.mayd...@linaro.org; QEmu Devel qemu-devel@nongnu.org Sent: Sunday, 18 August 2013, 8:00 Subject: Re: [Qemu-devel] minimal linux distribution for qemu On 08/16/2013 11:17:06 AM, Herbei Dacian wrote: my system should run in far less memory. something like 2-4MB. but first I need to have a system running so that I can monitor with qemu the addresses accessed for read execute and write by the code run by the emulator. if I reach that is a real big deal. dacian Linux 2.6 and later won't run in 2 megs at all. You can trim it down to 4 megs on a nommu system (the page tables take up too much ram otherwise), but won't be able to do much. Really, things like kobjects in the modern kernel take up too much space. Getting anything to work in 4 megs requires diabling all the printk strings at compile time. (The last time I saw somebody do a 4 meg system was CELF in 2006. 32 bit x86.) Look at the uClinux project. Or try to bolt your app onto uboot and run it on the bare metal. Rob
Re: [Qemu-devel] minimal linux distribution for qemu
Thanks Rob I think that should do it for me. From: Rob Landley r...@landley.net To: Andreas Färber afaer...@suse.de Cc: Herbei Dacian dacian_her...@yahoo.fr; QEmu Devel qemu-devel@nongnu.org Sent: Friday, 16 August 2013, 17:59 Subject: Re: [Qemu-devel] minimal linux distribution for qemu On 08/15/2013 06:53:30 AM, Andreas Färber wrote: Hi, Am 15.08.2013 10:57, schrieb Herbei Dacian: please, can anyone recommend me a distribution that offers a barebone linux kernel. minimum that I need on that image are: _ the kernel _ the compiler and development infrastructure to build it Aboriginal Linux. Andreas Aboriginal actually comes with qemu launch scripts for each target. ./run-emulator.sh is just the qemu command line, ./dev-environment.sh is a wrappe around that providing a better development enviornment (more memory and disk space). It's all described at http://landley.net/aboriginal/about.html Try this: wget http://landley.net/aboriginal/bin/system-image-armv5l.tar.bz2 tar xvjf system-image-armv5l.tar.bz2 cd system-image.armv5l ./run-emulator.sh gcc /usr/src/thread-hello2.c -lpthread ./a.out exit Thanks, Rob
Re: [Qemu-devel] minimal linux distribution for qemu
my system should run in far less memory. something like 2-4MB. but first I need to have a system running so that I can monitor with qemu the addresses accessed for read execute and write by the code run by the emulator. if I reach that is a real big deal. dacian From: Rob Landley r...@landley.net To: Herbei Dacian dacian_her...@yahoo.fr Cc: Peter Maydell peter.mayd...@linaro.org; QEmu Devel qemu-devel@nongnu.org Sent: Friday, 16 August 2013, 18:05 Subject: Re: [Qemu-devel] minimal linux distribution for qemu On 08/15/2013 09:01:19 AM, Herbei Dacian wrote: yes but which binary do I use to call to run an emulated arm image? is there an actual binary that can emulate an existing arm board, anyboard? qemu? if not which is the emulator that works with arm? If not where is the project that I can tweak to build such a binary. The arm versatilepb emulation can accept a range of processors (I've tried armv4, armv4t, armv5, armv6, and armv7), provides a PCI bus with a virtual hard drive controller and network card, and can accept 256 megs of ram. (In theory it can accept more but I have to get the discontiguous memory stuff to work, haven't done that yet.) That's the one I used in Aboriginal Linux arm images. Rob
[Qemu-devel] minimal linux distribution for qemu
hi, please, can anyone recommend me a distribution that offers a barebone linux kernel. minimum that I need on that image are: _ the kernel _ the compiler and development infrastructure to build it regards, dacian
Re: [Qemu-devel] minimal linux distribution for qemu
In the end I went for debian cause it is widely used. So I'm using the following command to install linux: qemu-system-arm -m 1024 -hda arm.img -cdrom debian-7.1.0-armel-CD-1.iso -boot d And I get this error: Kernel image must be specified In the documentation is mentioned that i don't need a bzImage if the CD is bootable. any suggestions?
Re: [Qemu-devel] minimal linux distribution for qemu
OK but which command should I use if that is broken and where I can find some documentation that is actually up to date? From: Peter Maydell peter.mayd...@linaro.org To: Herbei Dacian dacian_her...@yahoo.fr Cc: QEmu Devel qemu-devel@nongnu.org Sent: Thursday, 15 August 2013, 15:31 Subject: Re: [Qemu-devel] minimal linux distribution for qemu On 15 August 2013 14:22, Herbei Dacian dacian_her...@yahoo.fr wrote: In the end I went for debian cause it is widely used. So I'm using the following command to install linux: qemu-system-arm -m 1024 -hda arm.img -cdrom debian-7.1.0-armel-CD-1.iso -boot d This command line is totally broken. You're running (by default) an emulation of the 'integratorcp' board (which is pretty much obsolete and a bad choice), and you're trying to pass it a CDROM image, when the board doesn't have a CDROM drive. You need to specify the right board to emulate (with '-M something' and also pass a kernel and an initrd to load (with -kernel and -initrd). -- PMM
Re: [Qemu-devel] minimal linux distribution for qemu
yes but which binary do I use to call to run an emulated arm image? is there an actual binary that can emulate an existing arm board, anyboard? qemu? if not which is the emulator that works with arm? If not where is the project that I can tweak to build such a binary. I can search for the board that is not a problem and then I can tweak the project but I need to know where can I find this. I couldn't find any documentation in this direction. From: Peter Maydell peter.mayd...@linaro.org To: Herbei Dacian dacian_her...@yahoo.fr Cc: QEmu Devel qemu-devel@nongnu.org Sent: Thursday, 15 August 2013, 15:48 Subject: Re: [Qemu-devel] minimal linux distribution for qemu On 15 August 2013 14:46, Herbei Dacian dacian_her...@yahoo.fr wrote: OK but which command should I use if that is broken and where I can find some documentation that is actually up to date? You need to start by finding out which of the boards QEMU models your distribution actually supports, and the expected install method for them. ARM is *not* like x86 here -- all x86 systems are basically identical, but all ARM boards are different and you need the correct kernel for the board you're running, whether that board is real hardware or emulated. -- PMM
Re: [Qemu-devel] minimal linux distribution for qemu
but you said that qemu-system-arm is not maintained and it doesn't work. The link below contains only links to kernel images that don't work. Anyway I'll figure it somehow cause this doesn't help me. From: Peter Maydell peter.mayd...@linaro.org To: Herbei Dacian dacian_her...@yahoo.fr Cc: QEmu Devel qemu-devel@nongnu.org Sent: Thursday, 15 August 2013, 16:05 Subject: Re: [Qemu-devel] minimal linux distribution for qemu On 15 August 2013 15:01, Herbei Dacian dacian_her...@yahoo.fr wrote: yes but which binary do I use to call to run an emulated arm image? qemu-system-arm. is there an actual binary that can emulate an existing arm board, anyboard? qemu-system-arm -M help lists the boards we support. http://www.aurel32.net/info/debian_arm_qemu.php is a good howto type document. -- PMM
[Qemu-devel] memory reads and writes
Hello all, my name is Dacian and I'm new on this mailing list. I would like to visualize during execution the addresses of the instruction currently been executed, the address of the memory being read and being written by the same execution if it applies. has anyone tried this before maybe is already implemented. best regards, dacian
