arm-linux-gnueabi-gcc is a compiler for Linux. You've got your very own ARM Debian install on your PC! :-) Now, there are some more things to do, but they are the same for ordinary chroot environment: copy /etc/recolv.conf So, to recap: We use qemu user emulation to run the ARM executables chroot as a place to keep the installed distro including the required dynamic libraries binfmt_misc to tell the Qemu supports several architectures in this way, including ARM.
Running ARM Linux on your desktop PC Configuring linux kernel for use on ALIX 2 Compiling linux kernel for x86 on x86_64 You knew it was coming About me David A new_argp = alloca((argc + 3 + 1) * sizeof(void *)); for (i = 0; i < argc; i++) new_argp[i + 3] = argv[i]; new_argp[i + 3] = NULL; This is how If you want to run binaries from different architecture you will need an Emulator. URL: The information about this bug in Launchpad is automatically pulled daily from the remote bug. https://wiki.debian.org/QemuUserEmulation
Next, the original argv for the guest process is preserved using the -0 parameter of QEMU, followed by the argv we want. binfmt would be possible once he has properly installed qemu with qemu-arm emulation, but I believe he is wanting to enter his ARM emulation environment (e.g. Here I'm showing you the simplest way I know. Executing ARM binaries on x86 (and x86_64 in that matter) would lead to "Exec format error".
Try export PATH=/sbin:/usr/sbin:/usr/bin:/bin. For that purpose Qemu (Quick EMUlator) can be a good choice. At this point, new_argp, new_argp and new_argp are undefined and new_argp has the original argv of the guest process. Qemu Static Build Such situation (wanting a different set of libraries) can be solved by a chroot.
Youshchenko provides some ARM-specific instructions at http://yoush.homelinux.org:8079/tech/setting-up-armel-qemubuilder with custom kernels. I'll Edit my comment on that. –0xAF Jun 28 '12 at 23:16 | show 3 more comments up vote 8 down vote I use an ARM chroot from time to time: Not the answer you're looking for? https://community.arm.com/groups/embedded/blog/2013/11/21/cross-compilation-for-arm Posted by David at 2:08 AM 9 comments: tropicalAugust 2, 2010 at 5:54 AMThe Problem I am facing is Fedora Don't have static libs.
new_argp = strdup("/usr/bin/qemu-arm-static"); new_argp = strdup("-0"); new_argp = argv; new_argp = filename; These are the arguments passed to the emulator so that it can correctly emulate the guest process. Qemu-debootstrap unset LD_LIBRARY_PATH share|improve this answer answered Jun 20 '13 at 5:57 vivek_v 1013 -L /usr/arm-linux-gnueabihf for Ubuntu 16.04 package gcc-arm-linux-gnueabihf. –Ciro Santilli 烏坎事件2016六四事件 法轮功 Jun 23 at 18:31 add What if you intercepted all the translations of all execve() calls and did something similar to what binfmt_misc does? For chrooting, you will need a statically linked Qemu to your host system.
Then, binfmt_misc matches the executable signature with the one registered to run with /usr/bin/qemu-arm-static, and then creates a new exec request to the kernel, this time requesting to run the interpreter, http://resin.io/blog/building-arm-containers-on-any-x86-machine-even-dockerhub/ Since a container can only access its own private filesystem, the first step is getting the emulator in the container. Qemu-user-static mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc echo ':arm:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-arm-static:' > /proc/sys/fs/binfmt_misc/register The build of the forking Dockerfile now works like a charm: Step 3 : RUN /usr/bin/qemu-arm-static /bin/sh -c /bin/echo Hello from ARM Qemu-arm-static Download One thing is for sure: Forget the chroot method, you cannot run binaries compiled for ARM on x86 (x86_64).
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Moving a member function from base class to derived class breaks the program for no obvious reason The cost of switching to electric cars? Qemu-user-static Package My cat sat down on my laptop, now the right side of my keyboard types the wrong characters "Carrie has arrived at the airport for two hours." - Is this sentence But I think the OP were not looking for this king of solution.
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Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the There is a kernel feature called Binfmt, which does exactly this. If you have a small project and an ARM device with a Linux based system, you can easily compile it using the shipped compiler on the device. Update-binfmts share|improve this answer edited May 23 at 14:36 answered May 17 at 16:20 nucleon 62528 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign
The whole thing is prefixed by the QEMU emulator. Now to the chroot: The easiest way to create one is to get a linux distribution for the target architecture. You can use bash to browse around the filesystem too, like echo /* is roughly equivalent to ls /*. But wait!
Using the method above your Dockerfiles will now look like this: FROM resin/armv7hf-debian RUN [ "cross-build-start" ] RUN apt-get update RUN apt-get install python RUN pip install virtualenv RUN [ "cross-build-end" After replacing the variables, my chroot to ARM worked: SHELL=/bin/sh SUDO_COMMAND=/bin/sh chroot hd share|improve this answer answered Dec 18 '13 at 16:47 Victor Sergienko 1314 add a comment| up vote 0 Why? If you have questions or just want to say hi, you can hangout with us on gitter.
For our container usecase, having to spin up a VM for every container doesn't sound very appealing. UbuntuCommunityAsk!DeveloperDesignDiscourseHardwareInsightsJujuShopMore ›AppsHelpForumLaunchpadMAASCanonical current community chat Ask Ubuntu Ask Ubuntu Meta your communities Sign up or log in to customize your list. What if you could replace /bin/sh with something that the host system can run natively, which then calls the emulator and runs the original /bin/sh? You can read more about Binfmt here: https://www.kernel.org/doc/Documentation/binfmt_misc.txtMounting binfmt_misc: # mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc Setting the magic string and the emulator that should be invoked with the ARM binaries:
Finally, new_argp is the original filename, which is the path to the ARM executable. QEMU has two operating modes: User mode emulation: QEMU can launch Linux processes compiled for one CPU on another CPU, translating syscalls on the fly. The loader tries to find those files but fails and so reports no such file or directory. View my complete profile Simple template.