mirror of
https://github.com/qemu/qemu.git
synced 2024-11-30 23:33:51 +08:00
3bef0451e6
Original qemu-binfmt-conf.sh is only able to write configuration
into /proc/sys/fs/binfmt_misc, and the configuration is lost on reboot.
This script can configure debian and systemd services to restore
configuration on reboot. Moreover, it is able to manage binfmt
credential and to configure the path of the interpreter.
List of supported CPU is:
i386 i486 alpha arm sparc32plus ppc ppc64 ppc64le
m68k mips mipsel mipsn32 mipsn32el mips64 mips64el
sh4 sh4eb s390x aarch64
Usage: qemu-binfmt-conf.sh [--qemu-path PATH][--debian][--systemd CPU]
[--help][--credential yes|no][--exportdir PATH]
Configure binfmt_misc to use qemu interpreter
--help: display this usage
--qemu-path: set path to qemu interpreter (/usr/local/bin)
--debian: don't write into /proc,
instead generate update-binfmts templates
--systemd: don't write into /proc,
instead generate file for systemd-binfmt.service
for the given CPU
--exportdir: define where to write configuration files
(default: /etc/binfmt.d or /usr/share/binfmts)
--credential: if yes, credential an security tokens are
calculated according to the binary to interpret
To import templates with update-binfmts, use :
sudo update-binfmts --importdir /usr/share/binfmts --import qemu-CPU
To remove interpreter, use :
sudo update-binfmts --package qemu-CPU --remove qemu-CPU /usr/local/bin
With systemd, binfmt files are loaded by systemd-binfmt.service
The environment variable HOST_ARCH allows to override 'uname' to generate
configuration files for a different architecture than the current one.
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
324 lines
10 KiB
Bash
Executable File
324 lines
10 KiB
Bash
Executable File
#!/bin/sh
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# enable automatic i386/ARM/M68K/MIPS/SPARC/PPC/s390 program execution by the kernel
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qemu_target_list="i386 i486 alpha arm sparc32plus ppc ppc64 ppc64le m68k \
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mips mipsel mipsn32 mipsn32el mips64 mips64el \
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sh4 sh4eb s390x aarch64"
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i386_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00'
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i386_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
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i386_family=i386
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i486_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x06\x00'
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i486_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
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i486_family=i386
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alpha_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x26\x90'
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alpha_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
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alpha_family=alpha
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arm_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00'
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arm_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
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arm_family=arm
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armeb_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28'
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armeb_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
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armeb_family=arm
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sparc_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02'
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sparc_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
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sparc_family=sparc
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sparc32plus_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x12'
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sparc32plus_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
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sparc32plus_family=sparc
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ppc_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x14'
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ppc_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
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ppc_family=ppc
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ppc64_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15'
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ppc64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
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ppc64_family=ppc
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ppc64le_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15\x00'
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ppc64le_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\x00'
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ppc64le_family=ppcle
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m68k_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x04'
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m68k_mask='\xff\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
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m68k_family=m68k
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# FIXME: We could use the other endianness on a MIPS host.
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mips_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
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mips_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
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mips_family=mips
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mipsel_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
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mipsel_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
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mipsel_family=mips
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mipsn32_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
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mipsn32_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
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mipsn32_family=mips
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mipsn32el_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
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mipsn32el_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
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mipsn32el_family=mips
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mips64_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
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mips64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
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mips64_family=mips
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mips64el_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
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mips64el_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
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mips64el_family=mips
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sh4_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a\x00'
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sh4_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
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sh4_family=sh4
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sh4eb_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a'
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sh4eb_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
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sh4eb_family=sh4
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s390x_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x16'
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s390x_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
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s390x_family=s390x
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aarch64_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00'
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aarch64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
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aarch64_family=arm
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qemu_get_family() {
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cpu=${HOST_ARCH:-$(uname -m)}
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case "$cpu" in
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amd64|i386|i486|i586|i686|i86pc|BePC|x86_64)
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echo "i386"
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;;
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mips*)
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echo "mips"
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;;
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"Power Macintosh"|ppc64|powerpc|ppc)
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echo "ppc"
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;;
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ppc64el|ppc64le)
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echo "ppcle"
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;;
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arm|armel|armhf|arm64|armv[4-9]*)
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echo "arm"
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;;
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sparc*)
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echo "sparc"
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;;
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*)
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echo "$cpu"
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;;
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esac
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}
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usage() {
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cat <<EOF
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Usage: qemu-binfmt-conf.sh [--qemu-path PATH][--debian][--systemd CPU]
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[--help][--credential yes|no][--exportdir PATH]
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Configure binfmt_misc to use qemu interpreter
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--help: display this usage
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--qemu-path: set path to qemu interpreter ($QEMU_PATH)
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--debian: don't write into /proc,
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instead generate update-binfmts templates
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--systemd: don't write into /proc,
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instead generate file for systemd-binfmt.service
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for the given CPU
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--exportdir: define where to write configuration files
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(default: $SYSTEMDDIR or $DEBIANDIR)
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--credential: if yes, credential and security tokens are
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calculated according to the binary to interpret
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To import templates with update-binfmts, use :
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sudo update-binfmts --importdir ${EXPORTDIR:-$DEBIANDIR} --import qemu-CPU
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To remove interpreter, use :
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sudo update-binfmts --package qemu-CPU --remove qemu-CPU $QEMU_PATH
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With systemd, binfmt files are loaded by systemd-binfmt.service
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The environment variable HOST_ARCH allows to override 'uname' to generate
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configuration files for a different architecture than the current one.
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where CPU is one of:
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$qemu_target_list
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EOF
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}
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qemu_check_access() {
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if [ ! -w "$1" ] ; then
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echo "ERROR: cannot write to $1" 1>&2
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exit 1
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fi
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}
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qemu_check_bintfmt_misc() {
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# load the binfmt_misc module
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if [ ! -d /proc/sys/fs/binfmt_misc ]; then
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if ! /sbin/modprobe binfmt_misc ; then
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exit 1
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fi
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fi
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if [ ! -f /proc/sys/fs/binfmt_misc/register ]; then
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if ! mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc ; then
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exit 1
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fi
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fi
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qemu_check_access /proc/sys/fs/binfmt_misc/register
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}
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installed_dpkg() {
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dpkg --status "$1" > /dev/null 2>&1
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}
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qemu_check_debian() {
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if [ ! -e /etc/debian_version ] ; then
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echo "WARNING: your system is not a Debian based distro" 1>&2
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elif ! installed_dpkg binfmt-support ; then
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echo "WARNING: package binfmt-support is needed" 1>&2
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fi
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qemu_check_access "$EXPORTDIR"
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}
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qemu_check_systemd() {
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if ! systemctl -q is-enabled systemd-binfmt.service ; then
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echo "WARNING: systemd-binfmt.service is missing or disabled" 1>&2
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fi
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qemu_check_access "$EXPORTDIR"
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}
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qemu_generate_register() {
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echo ":qemu-$cpu:M::$magic:$mask:$qemu:$FLAGS"
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}
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qemu_register_interpreter() {
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echo "Setting $qemu as binfmt interpreter for $cpu"
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qemu_generate_register > /proc/sys/fs/binfmt_misc/register
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}
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qemu_generate_systemd() {
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echo "Setting $qemu as binfmt interpreter for $cpu for systemd-binfmt.service"
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qemu_generate_register > "$EXPORTDIR/qemu-$cpu.conf"
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}
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qemu_generate_debian() {
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cat > "$EXPORTDIR/qemu-$cpu" <<EOF
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package qemu-$cpu
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interpreter $qemu
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magic $magic
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mask $mask
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EOF
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if [ "$FLAGS" = "OC" ] ; then
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echo "credentials yes" >> "$EXPORTDIR/qemu-$cpu"
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fi
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}
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qemu_set_binfmts() {
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# probe cpu type
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host_family=$(qemu_get_family)
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# register the interpreter for each cpu except for the native one
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for cpu in ${qemu_target_list} ; do
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magic=$(eval echo \$${cpu}_magic)
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mask=$(eval echo \$${cpu}_mask)
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family=$(eval echo \$${cpu}_family)
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if [ "$magic" = "" ] || [ "$mask" = "" ] || [ "$family" = "" ] ; then
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echo "INTERNAL ERROR: unknown cpu $cpu" 1>&2
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continue
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fi
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qemu="$QEMU_PATH/qemu-$cpu"
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if [ "$cpu" = "i486" ] ; then
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qemu="$QEMU_PATH/qemu-i386"
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fi
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if [ "$host_family" != "$family" ] ; then
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$BINFMT_SET
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fi
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done
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}
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CHECK=qemu_check_bintfmt_misc
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BINFMT_SET=qemu_register_interpreter
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SYSTEMDDIR="/etc/binfmt.d"
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DEBIANDIR="/usr/share/binfmts"
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QEMU_PATH=/usr/local/bin
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FLAGS=""
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options=$(getopt -o ds:Q:e:hc: -l debian,systemd:,qemu-path:,exportdir:,help,credential: -- "$@")
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eval set -- "$options"
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while true ; do
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case "$1" in
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-d|--debian)
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CHECK=qemu_check_debian
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BINFMT_SET=qemu_generate_debian
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EXPORTDIR=${EXPORTDIR:-$DEBIANDIR}
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;;
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-s|--systemd)
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CHECK=qemu_check_systemd
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BINFMT_SET=qemu_generate_systemd
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EXPORTDIR=${EXPORTDIR:-$SYSTEMDDIR}
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shift
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# check given cpu is in the supported CPU list
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for cpu in ${qemu_target_list} ; do
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if [ "$cpu" == "$1" ] ; then
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break
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fi
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done
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if [ "$cpu" == "$1" ] ; then
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qemu_target_list="$1"
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else
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echo "ERROR: unknown CPU \"$1\"" 1>&2
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usage
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exit 1
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fi
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;;
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-Q|--qemu-path)
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shift
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QEMU_PATH="$1"
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;;
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-e|--exportdir)
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shift
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EXPORTDIR="$1"
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;;
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-h|--help)
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usage
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exit 1
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;;
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-c|--credential)
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shift
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if [ "$1" = "yes" ] ; then
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FLAGS="OC"
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else
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FLAGS=""
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fi
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;;
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*)
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break
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;;
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esac
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shift
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done
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$CHECK
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qemu_set_binfmts
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