Print Page - How enable aarch64 binary support [SOLVED]

Title: How enable aarch64 binary support [SOLVED]
Post by: kiblaster on 30 July 2023, 16:42:08

https://github.com/torvalds/linux/blob/master/Documentation/admin-guide/binfmt-misc.rst
According to the doc to enable something you use:

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#enable support for packed DOS applications (pre-configured dosemu hdimages):
echo ':DEXE:M::\x0eDEX::/usr/bin/dosexec:' > register

I have installed qemu-system-aarch64, qemu-user-static, qemu-user-static-binfmt.

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cat /proc/sys/fs/binfmt_misc/status 
enabled
ls /proc/sys/fs/binfmt_misc/
register  status

I'd like to chroot to aarch64 systems, that's why I am doing this (from x86_64).

Title: Re: How enable aarch64 binary support
Post by: phoenix_king_rus on 01 August 2023, 07:22:19

There is some binfmt file provided by one of qemu packages, you can cat it in the same way

Title: Re: How enable aarch64 binary support
Post by: kiblaster on 01 August 2023, 17:11:20

I listed the files installed, I think that it is this:

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cat /usr/lib/binfmt.d/qemu-aarch64-static.conf
:qemu-aarch64:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-aarch64-static:FP

Or maybe be-static?

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qemu-user-static-binfmt /usr/lib/binfmt.d/qemu-aarch64-static.conf
qemu-user-static-binfmt /usr/lib/binfmt.d/qemu-aarch64_be-static.conf

I used this:

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echo ':qemu-aarch64:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin/qemu-aarch64-static:' > /proc/sys/fs/binfmt_misc/register

Is it correct?

I cannot cat the register:

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cat /proc/sys/fs/binfmt_misc/register 
cat: /proc/sys/fs/binfmt_misc/register: Invalid argument

Is that normal?

Title: Re: How enable aarch64 binary support
Post by: phoenix_king_rus on 02 August 2023, 07:33:18

Quote from: kiblaster – on 01 August 2023, 17:11:20

Or maybe be-static?

No, you need normal one

Quote from: kiblaster – on 01 August 2023, 17:11:20

I cannot cat the register

It's ok, aarch64 file should appear in the same directory if it was registered correctly

Title: Re: How enable aarch64 binary support
Post by: kiblaster on 02 August 2023, 20:19:09

It worked I have the qemu-aarch64 file there and I can chroot.

Now I have all of them:

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ls /proc/sys/fs/binfmt_misc
qemu-aarch64       qemu-mips       qemu-riscv64
qemu-aarch64_be    qemu-mips64     qemu-s390x
qemu-alpha         qemu-mips64el   qemu-sh4
qemu-arm           qemu-mipsel     qemu-sh4eb
qemu-armeb         qemu-mipsn32    qemu-sparc
qemu-hexagon       qemu-mipsn32el  qemu-sparc32plus
qemu-hppa          qemu-or1k       qemu-sparc64
qemu-loongarch64   qemu-ppc        qemu-xtensa
qemu-m68k          qemu-ppc64      qemu-xtensaeb
qemu-microblaze    qemu-ppc64le    register
qemu-microblazeel  qemu-riscv32    status

Not sure what triggered that.

Edit:
The binfmt service, from dinit-rc, should do that automatically.
So you can just restart that.

Instead of powering off the device I hibernated so it wasn't restarted.

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Artix Linux => System => Topic started by: kiblaster on 30 July 2023, 16:42:08