CONFIG_BINFMT_MISC on Raspberry Pi

Hi,

I'd like to run some x86 only software on my Raspberry Pi 3 and I was following this blog (but with an arm host and x86 binaries):

Transparently running binaries from any architecture in Linux with QEMU and binfmt_misc – Own your bits

I created a docker image with qemu and an x86 Debian buster chroot but I noticed that the 4.19 kernel does not have binfmt_misc support.

I was poking around and I saw at least one Linux 5 kernel that already had it so maybe LE 10 will have this when it comes out but it would be nice if the next release of 9 had it too.

I'm loving LE...I can finally transcode DTS audio to my soundbar that only supports Dolby Digital. Kudos to everyone who has contributed.

I was able to get Debian stretch to work. Buster segfaults when running ldconfig for some reason. I built LE with

Quote

diff --git a/projects/RPi/devices/RPi2/linux/linux.arm.conf b/projects/RPi/devices/RPi2/linux/linux.arm.conf

index 7466d11b99..a1c0c34c71 100644

--- a/projects/RPi/devices/RPi2/linux/linux.arm.conf

+++ b/projects/RPi/devices/RPi2/linux/linux.arm.conf

@@ -711,7 +711,7 @@ CONFIG_ELFCORE=y

CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y

CONFIG_BINFMT_SCRIPT=y

# CONFIG_BINFMT_FLAT is not set

-# CONFIG_BINFMT_MISC is not set

+CONFIG_BINFMT_MISC=y

CONFIG_COREDUMP=y

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and then I built this Dockerfile

Quote

FROM arm32v7/debian:buster

# Save this as /storage/qemu/Dockerfile and run

# docker build -t qemu /storage/qemu

# And then to start the container run

# docker run --privileged --rm --name qemu -v /storage:/storage -it qemu

RUN apt-get update

RUN apt-get -y install qemu binfmt-support qemu-user-static debootstrap dialog

CMD dpkg-reconfigure qemu-user-static > /dev/null; \

if [ ! -e /storage/x86/stretch ]; then \

mkdir -p /storage/x86/stretch; \

debootstrap --arch amd64 stretch /storage/x86/stretch Index of /debian; \

fi; \

for f in dev dev/pts sys proc run; do \

mount --bind /$f /storage/x86/stretch/$f; \

done; \

chroot /storage/x86/stretch

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It's slow but it works.

I opened a pull request, hopefully against the right branch.

Enable CONFIG_BINFMT_MISC on RasPi 1/2/3/4 by volfyd · Pull Request #4502 · LibreELEC/LibreELEC.tv · GitHub