Qemu-arm-static Download |TOP|

The qemu-arm-static translates ARM machine instructions into your host cpu machine instructions. There is no layer of -M or -machine virtualization. There is no layer of virtualizing the PCI devices, SCSI devices, hard drives, motherboard, RAM size and like CPU speed. These do not exists, cause the machine the qemu-arm-static is running on is your host machine and qemu-arm-static just translates one machine instructions into another set.

I don't know how do you get the "board name" on your host machine, but if you run dmidecode -t 2 on qemu-arm-static i guess it should return your host "board name" (if it works). The "cpu name" will be the same, as syscalls are transferred to running kernel and querying for the "cpu name" from /proc/cpuinfo will be the same as on your host.

Qemu-arm-static Download

Download File 🔥 https://tlniurl.com/2y3B8d 🔥

versatilepb is the virtualization of the Arm926EJ-S board. It has 32 kB instruction cache and a 32 kB data cacheand 256 kB of Internal SRAM and so on. qemu-arm-static uses your host RAM and your host cpu speed - it does not virtualizes RAM accesses and similar. So there is no such configuration in qemu-arm-static.

The -cpu in qemu-arm-static default to any, ie. it understands all machine instructions sets available for arm platform it was written to support. That is at least all of the 32-bit Thumb/Thumb-2 instruction sets.

...The fix-binary flag of binfmt is meant to specifically deal with this. The interpreter file (e.g. qemu-arm-static) is loaded when its binfmt rule is installed instead of when a file that requires it is encountered. When the kernel then encounters a file which requires that interpreter it simply execs the already open file descriptor instead of opening a new one (IOW: the kernel already has the correct file descriptor open, so possibly divergent roots no longer play into finding the interpreter thus allowing namespaces/containers/chroots of a foreign architecture to be run like native ones).

There is of course a workaround as mentioned in another answer where you copy qemu-arm-statick into your chroot environment. For this to work it must be in the same location in the chroot environment as it is on your host. Eg:

I also tested on a fresh Ubuntu 18.04 installation, with the same script mentioned above and the same `qemu-arm-static` image from the AUR package. Executables with `suid` mask (like sudo) work as expected.

Problem solved.

The config from AUR package `qemu-arm-static` doesn't allow to determine new process credentials based on program.

More specifically, for the binfmt config file located at `/usr/bin/binfmt.d/${arch}.conf` as its format described in _misc,

the AUR package sets the `flags` to `F` without `O`, which prevents running executables with suid attribute as root.

SI localhost ~ docker run --rm --privileged multiarch/qemu-user-static --reset -p yes Setting /usr/bin/qemu-alpha-static as binfmt interpreter for alpha Setting /usr/bin/qemu-arm-static as binfmt interpreter for arm Setting /usr/bin/qemu-armeb-static as binfmt interpreter for armeb Setting /usr/bin/qemu-sparc-static as binfmt interpreter for sparc Setting /usr/bin/qemu-sparc32plus-static as binfmt interpreter for sparc32plus Setting /usr/bin/qemu-sparc64-static as binfmt interpreter for sparc64 Setting /usr/bin/qemu-ppc-static as binfmt interpreter for ppc Setting /usr/bin/qemu-ppc64-static as binfmt interpreter for ppc64 Setting /usr/bin/qemu-ppc64le-static as binfmt interpreter for ppc64le Setting /usr/bin/qemu-m68k-static as binfmt interpreter for m68k Setting /usr/bin/qemu-mips-static as binfmt interpreter for mips Setting /usr/bin/qemu-mipsel-static as binfmt interpreter for mipsel Setting /usr/bin/qemu-mipsn32-static as binfmt interpreter for mipsn32 Setting /usr/bin/qemu-mipsn32el-static as binfmt interpreter for mipsn32el Setting /usr/bin/qemu-mips64-static as binfmt interpreter for mips64 Setting /usr/bin/qemu-mips64el-static as binfmt interpreter for mips64el Setting /usr/bin/qemu-sh4-static as binfmt interpreter for sh4 Setting /usr/bin/qemu-sh4eb-static as binfmt interpreter for sh4eb Setting /usr/bin/qemu-s390x-static as binfmt interpreter for s390x Setting /usr/bin/qemu-aarch64-static as binfmt interpreter for aarch64 Setting /usr/bin/qemu-aarch64_be-static as binfmt interpreter for aarch64_be Setting /usr/bin/qemu-hppa-static as binfmt interpreter for hppa Setting /usr/bin/qemu-riscv32-static as binfmt interpreter for riscv32 Setting /usr/bin/qemu-riscv64-static as binfmt interpreter for riscv64 Setting /usr/bin/qemu-xtensa-static as binfmt interpreter for xtensa Setting /usr/bin/qemu-xtensaeb-static as binfmt interpreter for xtensaeb Setting /usr/bin/qemu-microblaze-static as binfmt interpreter for microblaze Setting /usr/bin/qemu-microblazeel-static as binfmt interpreter for microblazeel Setting /usr/bin/qemu-or1k-static as binfmt interpreter for or1k

The guide then goes on to say that in order to build an ARM image, you have to copy the interpreter from step 2 to the same location it has on your system within the image, and in order to run an ARM image you have to mount the two copies using the option -v /usr/bin/qemu-arm-static:/usr/bin/qemu-arm-static.

There is a single important field in the binfmt_misc kernel module config, the flag F. That flag indicates the path to the interpreter is fixed regardless of the mount namespace. Otherwise, when a file is encountered that appears to be for another platform, binfmt will look for the interpreter (/usr/bin/qemu-arm-static) in the same mount namespace as the command you are attempting to run, and you'll get a file not found error.

In the jessie-chroot, transmission would be available in version 2.84-0.2+deb8u2.

But, as reported in this thread, the build process aborts with errors from qemu-arm-static, even with the latest one available from jessie repositories.

This gets registered with /proc/sys/fs/binfmt_misc/register andinforms the kernel that there is a new binfmt called qemu-arm, andthat files that contain the specified byte pattern in the headershould be handled with /usr/bin/qemu-arm-static.

So as to obtain a Docker Image which can be correctly built and run on an ARM host, you need to have a base Image with the target qemu statically linked executable, qemu-arm-static in this case. There are plenty ready Images complete of the qemu static binary:

With the help of this command, you set /usr/bin/qemu-arm-static to be invoked every time, when you run an Arm binary. Of course, if you change your root directory to your Arm one, you have to have this emulator available there as well. So, you should have to copy the qemu-arm-static to your Arm root directory.

We just have to put the QEMU emulator binaryinto the Docker container, and as long as weplace it at the correct path /usr/bin/qemu-arm-static, this should work. The easiestway to include the binary to the correct folder is to create a tar archive and usethe ADD command in the Dockerfile. 2351a5e196