diff mbox

[v3] linux-user: Fix qemu-binfmt-conf.h to store config across reboot

Message ID 1454083651-22101-1-git-send-email-laurent@vivier.eu (mailing list archive)
State New, archived
Headers show

Commit Message

Laurent Vivier Jan. 29, 2016, 4:07 p.m. UTC
Original qemu-binfmt-conf.h 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>
---
v3: change subject to be shorter
    fix typo
    remove "!EOF", "echo -n" and "[ ... -o ... ]"
    check cpu given by --systemd is in the list
v2: replace some ERRORS by WARNINGS to be able to use the script inside a package build
    check only the right to write in the directory, no need to be root
    merge systemd and binfmt_misc configuration generation
    s/qemu_generate_packages/qemu_generate_debian/
    add support of HOST_ARCH from debian, and update CPU families.
    allow to use --exportdir with --systemd and update "Usage".

 scripts/qemu-binfmt-conf.sh | 389 ++++++++++++++++++++++++++++++++++++--------
 1 file changed, 320 insertions(+), 69 deletions(-)
 mode change 100644 => 100755 scripts/qemu-binfmt-conf.sh

Comments

Laurent Vivier Feb. 15, 2016, 10:47 p.m. UTC | #1
Ping?

Le 29/01/2016 17:07, Laurent Vivier a écrit :
> Original qemu-binfmt-conf.h 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>
> ---
> v3: change subject to be shorter
>     fix typo
>     remove "!EOF", "echo -n" and "[ ... -o ... ]"
>     check cpu given by --systemd is in the list
> v2: replace some ERRORS by WARNINGS to be able to use the script inside a package build
>     check only the right to write in the directory, no need to be root
>     merge systemd and binfmt_misc configuration generation
>     s/qemu_generate_packages/qemu_generate_debian/
>     add support of HOST_ARCH from debian, and update CPU families.
>     allow to use --exportdir with --systemd and update "Usage".
> 
>  scripts/qemu-binfmt-conf.sh | 389 ++++++++++++++++++++++++++++++++++++--------
>  1 file changed, 320 insertions(+), 69 deletions(-)
>  mode change 100644 => 100755 scripts/qemu-binfmt-conf.sh
> 
> diff --git a/scripts/qemu-binfmt-conf.sh b/scripts/qemu-binfmt-conf.sh
> old mode 100644
> new mode 100755
> index 289b1a3..de4d1c1
> --- a/scripts/qemu-binfmt-conf.sh
> +++ b/scripts/qemu-binfmt-conf.sh
> @@ -1,72 +1,323 @@
>  #!/bin/sh
>  # enable automatic i386/ARM/M68K/MIPS/SPARC/PPC/s390 program execution by the kernel
>  
> -# load the binfmt_misc module
> -if [ ! -d /proc/sys/fs/binfmt_misc ]; then
> -  /sbin/modprobe binfmt_misc
> -fi
> -if [ ! -f /proc/sys/fs/binfmt_misc/register ]; then
> -  mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc
> -fi
> -
> -# probe cpu type
> -cpu=`uname -m`
> -case "$cpu" in
> -  i386|i486|i586|i686|i86pc|BePC|x86_64)
> -    cpu="i386"
> -  ;;
> -  m68k)
> -    cpu="m68k"
> -  ;;
> -  mips*)
> -    cpu="mips"
> -  ;;
> -  "Power Macintosh"|ppc|ppc64)
> -    cpu="ppc"
> -  ;;
> -  armv[4-9]*)
> -    cpu="arm"
> -  ;;
> -esac
> -
> -# register the interpreter for each cpu except for the native one
> -if [ $cpu != "i386" ] ; then
> -    echo ':i386:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00:\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-i386:' > /proc/sys/fs/binfmt_misc/register
> -    echo ':i486:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x06\x00:\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-i386:' > /proc/sys/fs/binfmt_misc/register
> -fi
> -if [ $cpu != "alpha" ] ; then
> -    echo ':alpha:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x26\x90:\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-alpha:' > /proc/sys/fs/binfmt_misc/register
> -fi
> -if [ $cpu != "arm" ] ; then
> -    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/local/bin/qemu-arm:' > /proc/sys/fs/binfmt_misc/register
> -    echo   ':armeb:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-armeb:' > /proc/sys/fs/binfmt_misc/register
> -fi
> -if [ $cpu != "aarch64" ] ; then
> -    echo ':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/local/bin/qemu-aarch64:' > /proc/sys/fs/binfmt_misc/register
> -fi
> -if [ $cpu != "sparc" ] ; then
> -    echo   ':sparc:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-sparc:' > /proc/sys/fs/binfmt_misc/register
> -fi
> -if [ $cpu != "ppc" ] ; then
> -    echo   ':ppc:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x14:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-ppc:' > /proc/sys/fs/binfmt_misc/register
> -fi
> -if [ $cpu != "m68k" ] ; then
> -    echo   'Please check cpu value and header information for m68k!'
> -    echo   ':m68k:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x04:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-m68k:' > /proc/sys/fs/binfmt_misc/register
> -fi
> -if [ $cpu != "mips" ] ; then
> -    # FIXME: We could use the other endianness on a MIPS host.
> -    echo   ':mips:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-mips:' > /proc/sys/fs/binfmt_misc/register
> -    echo   ':mipsel:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-mipsel:' > /proc/sys/fs/binfmt_misc/register
> -    echo   ':mipsn32:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-mipsn32:' > /proc/sys/fs/binfmt_misc/register
> -    echo   ':mipsn32el:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-mipsn32el:' > /proc/sys/fs/binfmt_misc/register
> -    echo   ':mips64:M::\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-mips64:' > /proc/sys/fs/binfmt_misc/register
> -    echo   ':mips64el:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-mips64el:' > /proc/sys/fs/binfmt_misc/register
> -fi
> -if [ $cpu != "sh" ] ; then
> -    echo    ':sh4:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a\x00:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-sh4:' > /proc/sys/fs/binfmt_misc/register
> -    echo    ':sh4eb:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-sh4eb:' > /proc/sys/fs/binfmt_misc/register
> -fi
> -if [ $cpu != "s390x" ] ; then
> -    echo   ':s390x:M::\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x16:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-s390x:' > /proc/sys/fs/binfmt_misc/register
> -fi
> +qemu_target_list="i386 i486 alpha arm sparc32plus ppc ppc64 ppc64le m68k \
> +mips mipsel mipsn32 mipsn32el mips64 mips64el \
> +sh4 sh4eb s390x aarch64"
> +
> +i386_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00'
> +i386_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
> +i386_family=i386
> +
> +i486_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x06\x00'
> +i486_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
> +i486_family=i386
> +
> +alpha_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x26\x90'
> +alpha_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
> +alpha_family=alpha
> +
> +arm_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00'
> +arm_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
> +arm_family=arm
> +
> +armeb_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28'
> +armeb_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
> +armeb_family=arm
> +
> +sparc_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02'
> +sparc_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
> +sparc_family=sparc
> +
> +sparc32plus_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x12'
> +sparc32plus_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
> +sparc32plus_family=sparc
> +
> +ppc_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x14'
> +ppc_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
> +ppc_family=ppc
> +
> +ppc64_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15'
> +ppc64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
> +ppc64_family=ppc
> +
> +ppc64le_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15\x00'
> +ppc64le_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\x00'
> +ppc64le_family=ppcle
> +
> +m68k_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x04'
> +m68k_mask='\xff\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
> +m68k_family=m68k
> +
> +# FIXME: We could use the other endianness on a MIPS host.
> +
> +mips_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
> +mips_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
> +mips_family=mips
> +
> +mipsel_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
> +mipsel_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
> +mipsel_family=mips
> +
> +mipsn32_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
> +mipsn32_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
> +mipsn32_family=mips
> +
> +mipsn32el_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
> +mipsn32el_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
> +mipsn32el_family=mips
> +
> +mips64_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
> +mips64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
> +mips64_family=mips
> +
> +mips64el_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
> +mips64el_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
> +mips64el_family=mips
> +
> +sh4_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a\x00'
> +sh4_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
> +sh4_family=sh4
> +
> +sh4eb_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a'
> +sh4eb_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
> +sh4eb_family=sh4
> +
> +s390x_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x16'
> +s390x_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
> +s390x_family=s390x
> +
> +aarch64_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00'
> +aarch64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
> +aarch64_family=arm
> +
> +qemu_get_family() {
> +    cpu=${HOST_ARCH:-$(uname -m)}
> +    case "$cpu" in
> +    amd64|i386|i486|i586|i686|i86pc|BePC|x86_64)
> +        echo "i386"
> +        ;;
> +    mips*)
> +        echo "mips"
> +        ;;
> +    "Power Macintosh"|ppc64|powerpc|ppc)
> +        echo "ppc"
> +        ;;
> +    ppc64el|ppc64le)
> +        echo "ppcle"
> +        ;;
> +    arm|armel|armhf|arm64|armv[4-9]*)
> +        echo "arm"
> +        ;;
> +    sparc*)
> +        echo "sparc"
> +        ;;
> +    *)
> +        echo "$cpu"
> +        ;;
> +    esac
> +}
> +
> +usage() {
> +    cat <<EOF
> +Usage: qemu-binfmt-conf.sh [--qemu-path PATH][--debian][--systemd CPU]
> +                           [--help][--credential yes|no][--exportdir PATH]
> +
> +       Configure binfmt_misc to use qemu interpreter
> +
> +       --help:       display this usage
> +       --qemu-path:  set path to qemu interpreter ($QEMU_PATH)
> +       --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: $SYSTEMDDIR or $DEBIANDIR)
> +       --credential: if yes, credential and security tokens are
> +                     calculated according to the binary to interpret
> +
> +    To import templates with update-binfmts, use :
> +
> +        sudo update-binfmts --importdir ${EXPORTDIR:-$DEBIANDIR} --import qemu-CPU
> +
> +    To remove interpreter, use :
> +
> +        sudo update-binfmts --package qemu-CPU --remove qemu-CPU $QEMU_PATH
> +
> +    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.
> +
> +    where CPU is one of:
> +
> +        $qemu_target_list
> +
> +EOF
> +}
> +
> +qemu_check_access() {
> +    if [ ! -w "$1" ] ; then
> +        echo "ERROR: cannot write to $1" 1>&2
> +        exit 1
> +    fi
> +}
> +
> +qemu_check_bintfmt_misc() {
> +    # load the binfmt_misc module
> +    if [ ! -d /proc/sys/fs/binfmt_misc ]; then
> +      if ! /sbin/modprobe binfmt_misc ; then
> +          exit 1
> +      fi
> +    fi
> +    if [ ! -f /proc/sys/fs/binfmt_misc/register ]; then
> +      if ! mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc ; then
> +          exit 1
> +      fi
> +    fi
> +
> +    qemu_check_access /proc/sys/fs/binfmt_misc/register
> +}
> +
> +installed_dpkg() {
> +    dpkg --status "$1" > /dev/null 2>&1
> +}
> +
> +qemu_check_debian() {
> +    if [ ! -e /etc/debian_version ] ; then
> +        echo "WARNING: your system is not a Debian based distro" 1>&2
> +    elif ! installed_dpkg binfmt-support ; then
> +        echo "WARNING: package binfmt-support is needed" 1>&2
> +    fi
> +    qemu_check_access "$EXPORTDIR"
> +}
> +
> +qemu_check_systemd() {
> +    if ! systemctl -q is-enabled systemd-binfmt.service ; then
> +        echo "WARNING: systemd-binfmt.service is missing or disabled" 1>&2
> +    fi
> +    qemu_check_access "$EXPORTDIR"
> +}
> +
> +qemu_generate_register() {
> +    echo ":qemu-$cpu:M::$magic:$mask:$qemu:$FLAGS"
> +}
> +
> +qemu_register_interpreter() {
> +    echo "Setting $qemu as binfmt interpreter for $cpu"
> +    qemu_generate_register > /proc/sys/fs/binfmt_misc/register
> +}
> +
> +qemu_generate_systemd() {
> +    echo "Setting $qemu as binfmt interpreter for $cpu for systemd-binfmt.service"
> +    qemu_generate_register > "$EXPORTDIR/qemu-$cpu.conf"
> +}
> +
> +qemu_generate_debian() {
> +    cat > "$EXPORTDIR/qemu-$cpu" <<EOF
> +package qemu-$cpu
> +interpreter $qemu
> +magic $magic
> +mask $mask
> +EOF
> +    if [ "$FLAGS" = "OC" ] ; then
> +        echo "credentials yes" >> "$EXPORTDIR/qemu-$cpu"
> +    fi
> +}
> +
> +qemu_set_binfmts() {
> +    # probe cpu type
> +    host_family=$(qemu_get_family)
> +
> +    # register the interpreter for each cpu except for the native one
> +
> +    for cpu in ${qemu_target_list} ; do
> +        magic=$(eval echo \$${cpu}_magic)
> +        mask=$(eval echo \$${cpu}_mask)
> +        family=$(eval echo \$${cpu}_family)
> +
> +        if [ "$magic" = "" ] || [ "$mask" = "" ] || [ "$family" = "" ] ; then
> +            echo "INTERNAL ERROR: unknown cpu $cpu" 1>&2
> +            continue
> +        fi
> +
> +        qemu="$QEMU_PATH/qemu-$cpu"
> +        if [ "$cpu" = "i486" ] ; then
> +            qemu="$QEMU_PATH/qemu-i386"
> +        fi
> +
> +        if [ "$host_family" != "$family" ] ; then
> +            $BINFMT_SET
> +        fi
> +    done
> +}
> +
> +CHECK=qemu_check_bintfmt_misc
> +BINFMT_SET=qemu_register_interpreter
> +
> +SYSTEMDDIR="/etc/binfmt.d"
> +DEBIANDIR="/usr/share/binfmts"
> +
> +QEMU_PATH=/usr/local/bin
> +FLAGS=""
> +
> +options=$(getopt -o ds:Q:e:hc: -l debian,systemd:,qemu-path:,exportdir:,help,credential: -- "$@")
> +eval set -- "$options"
> +
> +while true ; do
> +    case "$1" in
> +    -d|--debian)
> +        CHECK=qemu_check_debian
> +        BINFMT_SET=qemu_generate_debian
> +        EXPORTDIR=${EXPORTDIR:-$DEBIANDIR}
> +        ;;
> +    -s|--systemd)
> +        CHECK=qemu_check_systemd
> +        BINFMT_SET=qemu_generate_systemd
> +        EXPORTDIR=${EXPORTDIR:-$SYSTEMDDIR}
> +        shift
> +        # check given cpu is in the supported CPU list
> +        for cpu in ${qemu_target_list} ; do
> +            if [ "$cpu" == "$1" ] ; then
> +                break
> +            fi
> +        done
> +
> +        if [ "$cpu" == "$1" ] ; then
> +            qemu_target_list="$1"
> +        else
> +            echo "ERROR: unknown CPU \"$1\"" 1>&2
> +            usage
> +            exit 1
> +        fi
> +        ;;
> +    -Q|--qemu-path)
> +        shift
> +        QEMU_PATH="$1"
> +        ;;
> +    -e|--exportdir)
> +        shift
> +        EXPORTDIR="$1"
> +        ;;
> +    -h|--help)
> +        usage
> +        exit 1
> +        ;;
> +    -c|--credential)
> +        shift
> +        if [ "$1" = "yes" ] ; then
> +            FLAGS="OC"
> +        else
> +            FLAGS=""
> +        fi
> +        ;;
> +    *)
> +        break
> +        ;;
> +    esac
> +    shift
> +done
> +
> +$CHECK
> +qemu_set_binfmts
>
Riku Voipio Feb. 17, 2016, 9:59 a.m. UTC | #2
Hi,

On 16 February 2016 at 00:47, Laurent Vivier <laurent@vivier.eu> wrote:
> Ping?

It looks good to me. But I'd like to see some ack/review from
Alexander or Michael.

Riku

> Le 29/01/2016 17:07, Laurent Vivier a écrit :
>> Original qemu-binfmt-conf.h 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>
>> ---
>> v3: change subject to be shorter
>>     fix typo
>>     remove "!EOF", "echo -n" and "[ ... -o ... ]"
>>     check cpu given by --systemd is in the list
>> v2: replace some ERRORS by WARNINGS to be able to use the script inside a package build
>>     check only the right to write in the directory, no need to be root
>>     merge systemd and binfmt_misc configuration generation
>>     s/qemu_generate_packages/qemu_generate_debian/
>>     add support of HOST_ARCH from debian, and update CPU families.
>>     allow to use --exportdir with --systemd and update "Usage".
>>
>>  scripts/qemu-binfmt-conf.sh | 389 ++++++++++++++++++++++++++++++++++++--------
>>  1 file changed, 320 insertions(+), 69 deletions(-)
>>  mode change 100644 => 100755 scripts/qemu-binfmt-conf.sh
>>
>> diff --git a/scripts/qemu-binfmt-conf.sh b/scripts/qemu-binfmt-conf.sh
>> old mode 100644
>> new mode 100755
>> index 289b1a3..de4d1c1
>> --- a/scripts/qemu-binfmt-conf.sh
>> +++ b/scripts/qemu-binfmt-conf.sh
>> @@ -1,72 +1,323 @@
>>  #!/bin/sh
>>  # enable automatic i386/ARM/M68K/MIPS/SPARC/PPC/s390 program execution by the kernel
>>
>> -# load the binfmt_misc module
>> -if [ ! -d /proc/sys/fs/binfmt_misc ]; then
>> -  /sbin/modprobe binfmt_misc
>> -fi
>> -if [ ! -f /proc/sys/fs/binfmt_misc/register ]; then
>> -  mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc
>> -fi
>> -
>> -# probe cpu type
>> -cpu=`uname -m`
>> -case "$cpu" in
>> -  i386|i486|i586|i686|i86pc|BePC|x86_64)
>> -    cpu="i386"
>> -  ;;
>> -  m68k)
>> -    cpu="m68k"
>> -  ;;
>> -  mips*)
>> -    cpu="mips"
>> -  ;;
>> -  "Power Macintosh"|ppc|ppc64)
>> -    cpu="ppc"
>> -  ;;
>> -  armv[4-9]*)
>> -    cpu="arm"
>> -  ;;
>> -esac
>> -
>> -# register the interpreter for each cpu except for the native one
>> -if [ $cpu != "i386" ] ; then
>> -    echo ':i386:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00:\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-i386:' > /proc/sys/fs/binfmt_misc/register
>> -    echo ':i486:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x06\x00:\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-i386:' > /proc/sys/fs/binfmt_misc/register
>> -fi
>> -if [ $cpu != "alpha" ] ; then
>> -    echo ':alpha:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x26\x90:\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-alpha:' > /proc/sys/fs/binfmt_misc/register
>> -fi
>> -if [ $cpu != "arm" ] ; then
>> -    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/local/bin/qemu-arm:' > /proc/sys/fs/binfmt_misc/register
>> -    echo   ':armeb:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-armeb:' > /proc/sys/fs/binfmt_misc/register
>> -fi
>> -if [ $cpu != "aarch64" ] ; then
>> -    echo ':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/local/bin/qemu-aarch64:' > /proc/sys/fs/binfmt_misc/register
>> -fi
>> -if [ $cpu != "sparc" ] ; then
>> -    echo   ':sparc:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-sparc:' > /proc/sys/fs/binfmt_misc/register
>> -fi
>> -if [ $cpu != "ppc" ] ; then
>> -    echo   ':ppc:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x14:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-ppc:' > /proc/sys/fs/binfmt_misc/register
>> -fi
>> -if [ $cpu != "m68k" ] ; then
>> -    echo   'Please check cpu value and header information for m68k!'
>> -    echo   ':m68k:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x04:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-m68k:' > /proc/sys/fs/binfmt_misc/register
>> -fi
>> -if [ $cpu != "mips" ] ; then
>> -    # FIXME: We could use the other endianness on a MIPS host.
>> -    echo   ':mips:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-mips:' > /proc/sys/fs/binfmt_misc/register
>> -    echo   ':mipsel:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-mipsel:' > /proc/sys/fs/binfmt_misc/register
>> -    echo   ':mipsn32:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-mipsn32:' > /proc/sys/fs/binfmt_misc/register
>> -    echo   ':mipsn32el:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-mipsn32el:' > /proc/sys/fs/binfmt_misc/register
>> -    echo   ':mips64:M::\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-mips64:' > /proc/sys/fs/binfmt_misc/register
>> -    echo   ':mips64el:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-mips64el:' > /proc/sys/fs/binfmt_misc/register
>> -fi
>> -if [ $cpu != "sh" ] ; then
>> -    echo    ':sh4:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a\x00:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-sh4:' > /proc/sys/fs/binfmt_misc/register
>> -    echo    ':sh4eb:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-sh4eb:' > /proc/sys/fs/binfmt_misc/register
>> -fi
>> -if [ $cpu != "s390x" ] ; then
>> -    echo   ':s390x:M::\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x16:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-s390x:' > /proc/sys/fs/binfmt_misc/register
>> -fi
>> +qemu_target_list="i386 i486 alpha arm sparc32plus ppc ppc64 ppc64le m68k \
>> +mips mipsel mipsn32 mipsn32el mips64 mips64el \
>> +sh4 sh4eb s390x aarch64"
>> +
>> +i386_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00'
>> +i386_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>> +i386_family=i386
>> +
>> +i486_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x06\x00'
>> +i486_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>> +i486_family=i386
>> +
>> +alpha_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x26\x90'
>> +alpha_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>> +alpha_family=alpha
>> +
>> +arm_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00'
>> +arm_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>> +arm_family=arm
>> +
>> +armeb_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28'
>> +armeb_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>> +armeb_family=arm
>> +
>> +sparc_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02'
>> +sparc_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>> +sparc_family=sparc
>> +
>> +sparc32plus_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x12'
>> +sparc32plus_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>> +sparc32plus_family=sparc
>> +
>> +ppc_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x14'
>> +ppc_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>> +ppc_family=ppc
>> +
>> +ppc64_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15'
>> +ppc64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>> +ppc64_family=ppc
>> +
>> +ppc64le_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15\x00'
>> +ppc64le_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\x00'
>> +ppc64le_family=ppcle
>> +
>> +m68k_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x04'
>> +m68k_mask='\xff\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>> +m68k_family=m68k
>> +
>> +# FIXME: We could use the other endianness on a MIPS host.
>> +
>> +mips_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
>> +mips_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>> +mips_family=mips
>> +
>> +mipsel_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
>> +mipsel_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>> +mipsel_family=mips
>> +
>> +mipsn32_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
>> +mipsn32_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>> +mipsn32_family=mips
>> +
>> +mipsn32el_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
>> +mipsn32el_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>> +mipsn32el_family=mips
>> +
>> +mips64_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
>> +mips64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>> +mips64_family=mips
>> +
>> +mips64el_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
>> +mips64el_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>> +mips64el_family=mips
>> +
>> +sh4_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a\x00'
>> +sh4_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>> +sh4_family=sh4
>> +
>> +sh4eb_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a'
>> +sh4eb_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>> +sh4eb_family=sh4
>> +
>> +s390x_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x16'
>> +s390x_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>> +s390x_family=s390x
>> +
>> +aarch64_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00'
>> +aarch64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>> +aarch64_family=arm
>> +
>> +qemu_get_family() {
>> +    cpu=${HOST_ARCH:-$(uname -m)}
>> +    case "$cpu" in
>> +    amd64|i386|i486|i586|i686|i86pc|BePC|x86_64)
>> +        echo "i386"
>> +        ;;
>> +    mips*)
>> +        echo "mips"
>> +        ;;
>> +    "Power Macintosh"|ppc64|powerpc|ppc)
>> +        echo "ppc"
>> +        ;;
>> +    ppc64el|ppc64le)
>> +        echo "ppcle"
>> +        ;;
>> +    arm|armel|armhf|arm64|armv[4-9]*)
>> +        echo "arm"
>> +        ;;
>> +    sparc*)
>> +        echo "sparc"
>> +        ;;
>> +    *)
>> +        echo "$cpu"
>> +        ;;
>> +    esac
>> +}
>> +
>> +usage() {
>> +    cat <<EOF
>> +Usage: qemu-binfmt-conf.sh [--qemu-path PATH][--debian][--systemd CPU]
>> +                           [--help][--credential yes|no][--exportdir PATH]
>> +
>> +       Configure binfmt_misc to use qemu interpreter
>> +
>> +       --help:       display this usage
>> +       --qemu-path:  set path to qemu interpreter ($QEMU_PATH)
>> +       --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: $SYSTEMDDIR or $DEBIANDIR)
>> +       --credential: if yes, credential and security tokens are
>> +                     calculated according to the binary to interpret
>> +
>> +    To import templates with update-binfmts, use :
>> +
>> +        sudo update-binfmts --importdir ${EXPORTDIR:-$DEBIANDIR} --import qemu-CPU
>> +
>> +    To remove interpreter, use :
>> +
>> +        sudo update-binfmts --package qemu-CPU --remove qemu-CPU $QEMU_PATH
>> +
>> +    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.
>> +
>> +    where CPU is one of:
>> +
>> +        $qemu_target_list
>> +
>> +EOF
>> +}
>> +
>> +qemu_check_access() {
>> +    if [ ! -w "$1" ] ; then
>> +        echo "ERROR: cannot write to $1" 1>&2
>> +        exit 1
>> +    fi
>> +}
>> +
>> +qemu_check_bintfmt_misc() {
>> +    # load the binfmt_misc module
>> +    if [ ! -d /proc/sys/fs/binfmt_misc ]; then
>> +      if ! /sbin/modprobe binfmt_misc ; then
>> +          exit 1
>> +      fi
>> +    fi
>> +    if [ ! -f /proc/sys/fs/binfmt_misc/register ]; then
>> +      if ! mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc ; then
>> +          exit 1
>> +      fi
>> +    fi
>> +
>> +    qemu_check_access /proc/sys/fs/binfmt_misc/register
>> +}
>> +
>> +installed_dpkg() {
>> +    dpkg --status "$1" > /dev/null 2>&1
>> +}
>> +
>> +qemu_check_debian() {
>> +    if [ ! -e /etc/debian_version ] ; then
>> +        echo "WARNING: your system is not a Debian based distro" 1>&2
>> +    elif ! installed_dpkg binfmt-support ; then
>> +        echo "WARNING: package binfmt-support is needed" 1>&2
>> +    fi
>> +    qemu_check_access "$EXPORTDIR"
>> +}
>> +
>> +qemu_check_systemd() {
>> +    if ! systemctl -q is-enabled systemd-binfmt.service ; then
>> +        echo "WARNING: systemd-binfmt.service is missing or disabled" 1>&2
>> +    fi
>> +    qemu_check_access "$EXPORTDIR"
>> +}
>> +
>> +qemu_generate_register() {
>> +    echo ":qemu-$cpu:M::$magic:$mask:$qemu:$FLAGS"
>> +}
>> +
>> +qemu_register_interpreter() {
>> +    echo "Setting $qemu as binfmt interpreter for $cpu"
>> +    qemu_generate_register > /proc/sys/fs/binfmt_misc/register
>> +}
>> +
>> +qemu_generate_systemd() {
>> +    echo "Setting $qemu as binfmt interpreter for $cpu for systemd-binfmt.service"
>> +    qemu_generate_register > "$EXPORTDIR/qemu-$cpu.conf"
>> +}
>> +
>> +qemu_generate_debian() {
>> +    cat > "$EXPORTDIR/qemu-$cpu" <<EOF
>> +package qemu-$cpu
>> +interpreter $qemu
>> +magic $magic
>> +mask $mask
>> +EOF
>> +    if [ "$FLAGS" = "OC" ] ; then
>> +        echo "credentials yes" >> "$EXPORTDIR/qemu-$cpu"
>> +    fi
>> +}
>> +
>> +qemu_set_binfmts() {
>> +    # probe cpu type
>> +    host_family=$(qemu_get_family)
>> +
>> +    # register the interpreter for each cpu except for the native one
>> +
>> +    for cpu in ${qemu_target_list} ; do
>> +        magic=$(eval echo \$${cpu}_magic)
>> +        mask=$(eval echo \$${cpu}_mask)
>> +        family=$(eval echo \$${cpu}_family)
>> +
>> +        if [ "$magic" = "" ] || [ "$mask" = "" ] || [ "$family" = "" ] ; then
>> +            echo "INTERNAL ERROR: unknown cpu $cpu" 1>&2
>> +            continue
>> +        fi
>> +
>> +        qemu="$QEMU_PATH/qemu-$cpu"
>> +        if [ "$cpu" = "i486" ] ; then
>> +            qemu="$QEMU_PATH/qemu-i386"
>> +        fi
>> +
>> +        if [ "$host_family" != "$family" ] ; then
>> +            $BINFMT_SET
>> +        fi
>> +    done
>> +}
>> +
>> +CHECK=qemu_check_bintfmt_misc
>> +BINFMT_SET=qemu_register_interpreter
>> +
>> +SYSTEMDDIR="/etc/binfmt.d"
>> +DEBIANDIR="/usr/share/binfmts"
>> +
>> +QEMU_PATH=/usr/local/bin
>> +FLAGS=""
>> +
>> +options=$(getopt -o ds:Q:e:hc: -l debian,systemd:,qemu-path:,exportdir:,help,credential: -- "$@")
>> +eval set -- "$options"
>> +
>> +while true ; do
>> +    case "$1" in
>> +    -d|--debian)
>> +        CHECK=qemu_check_debian
>> +        BINFMT_SET=qemu_generate_debian
>> +        EXPORTDIR=${EXPORTDIR:-$DEBIANDIR}
>> +        ;;
>> +    -s|--systemd)
>> +        CHECK=qemu_check_systemd
>> +        BINFMT_SET=qemu_generate_systemd
>> +        EXPORTDIR=${EXPORTDIR:-$SYSTEMDDIR}
>> +        shift
>> +        # check given cpu is in the supported CPU list
>> +        for cpu in ${qemu_target_list} ; do
>> +            if [ "$cpu" == "$1" ] ; then
>> +                break
>> +            fi
>> +        done
>> +
>> +        if [ "$cpu" == "$1" ] ; then
>> +            qemu_target_list="$1"
>> +        else
>> +            echo "ERROR: unknown CPU \"$1\"" 1>&2
>> +            usage
>> +            exit 1
>> +        fi
>> +        ;;
>> +    -Q|--qemu-path)
>> +        shift
>> +        QEMU_PATH="$1"
>> +        ;;
>> +    -e|--exportdir)
>> +        shift
>> +        EXPORTDIR="$1"
>> +        ;;
>> +    -h|--help)
>> +        usage
>> +        exit 1
>> +        ;;
>> +    -c|--credential)
>> +        shift
>> +        if [ "$1" = "yes" ] ; then
>> +            FLAGS="OC"
>> +        else
>> +            FLAGS=""
>> +        fi
>> +        ;;
>> +    *)
>> +        break
>> +        ;;
>> +    esac
>> +    shift
>> +done
>> +
>> +$CHECK
>> +qemu_set_binfmts
>>
Laurent Vivier Feb. 25, 2016, 4:28 p.m. UTC | #3
Please, Alex, Michael:

We need your ack/review.

Thanks,
Laurent

Le 17/02/2016 10:59, Riku Voipio a écrit :
> Hi,
> 
> On 16 February 2016 at 00:47, Laurent Vivier <laurent@vivier.eu> wrote:
>> Ping?
> 
> It looks good to me. But I'd like to see some ack/review from
> Alexander or Michael.
> 
> Riku
> 
>> Le 29/01/2016 17:07, Laurent Vivier a écrit :
>>> Original qemu-binfmt-conf.h 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>
>>> ---
>>> v3: change subject to be shorter
>>>     fix typo
>>>     remove "!EOF", "echo -n" and "[ ... -o ... ]"
>>>     check cpu given by --systemd is in the list
>>> v2: replace some ERRORS by WARNINGS to be able to use the script inside a package build
>>>     check only the right to write in the directory, no need to be root
>>>     merge systemd and binfmt_misc configuration generation
>>>     s/qemu_generate_packages/qemu_generate_debian/
>>>     add support of HOST_ARCH from debian, and update CPU families.
>>>     allow to use --exportdir with --systemd and update "Usage".
>>>
>>>  scripts/qemu-binfmt-conf.sh | 389 ++++++++++++++++++++++++++++++++++++--------
>>>  1 file changed, 320 insertions(+), 69 deletions(-)
>>>  mode change 100644 => 100755 scripts/qemu-binfmt-conf.sh
>>>
>>> diff --git a/scripts/qemu-binfmt-conf.sh b/scripts/qemu-binfmt-conf.sh
>>> old mode 100644
>>> new mode 100755
>>> index 289b1a3..de4d1c1
>>> --- a/scripts/qemu-binfmt-conf.sh
>>> +++ b/scripts/qemu-binfmt-conf.sh
>>> @@ -1,72 +1,323 @@
>>>  #!/bin/sh
>>>  # enable automatic i386/ARM/M68K/MIPS/SPARC/PPC/s390 program execution by the kernel
>>>
>>> -# load the binfmt_misc module
>>> -if [ ! -d /proc/sys/fs/binfmt_misc ]; then
>>> -  /sbin/modprobe binfmt_misc
>>> -fi
>>> -if [ ! -f /proc/sys/fs/binfmt_misc/register ]; then
>>> -  mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc
>>> -fi
>>> -
>>> -# probe cpu type
>>> -cpu=`uname -m`
>>> -case "$cpu" in
>>> -  i386|i486|i586|i686|i86pc|BePC|x86_64)
>>> -    cpu="i386"
>>> -  ;;
>>> -  m68k)
>>> -    cpu="m68k"
>>> -  ;;
>>> -  mips*)
>>> -    cpu="mips"
>>> -  ;;
>>> -  "Power Macintosh"|ppc|ppc64)
>>> -    cpu="ppc"
>>> -  ;;
>>> -  armv[4-9]*)
>>> -    cpu="arm"
>>> -  ;;
>>> -esac
>>> -
>>> -# register the interpreter for each cpu except for the native one
>>> -if [ $cpu != "i386" ] ; then
>>> -    echo ':i386:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00:\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-i386:' > /proc/sys/fs/binfmt_misc/register
>>> -    echo ':i486:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x06\x00:\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-i386:' > /proc/sys/fs/binfmt_misc/register
>>> -fi
>>> -if [ $cpu != "alpha" ] ; then
>>> -    echo ':alpha:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x26\x90:\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-alpha:' > /proc/sys/fs/binfmt_misc/register
>>> -fi
>>> -if [ $cpu != "arm" ] ; then
>>> -    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/local/bin/qemu-arm:' > /proc/sys/fs/binfmt_misc/register
>>> -    echo   ':armeb:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-armeb:' > /proc/sys/fs/binfmt_misc/register
>>> -fi
>>> -if [ $cpu != "aarch64" ] ; then
>>> -    echo ':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/local/bin/qemu-aarch64:' > /proc/sys/fs/binfmt_misc/register
>>> -fi
>>> -if [ $cpu != "sparc" ] ; then
>>> -    echo   ':sparc:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-sparc:' > /proc/sys/fs/binfmt_misc/register
>>> -fi
>>> -if [ $cpu != "ppc" ] ; then
>>> -    echo   ':ppc:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x14:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-ppc:' > /proc/sys/fs/binfmt_misc/register
>>> -fi
>>> -if [ $cpu != "m68k" ] ; then
>>> -    echo   'Please check cpu value and header information for m68k!'
>>> -    echo   ':m68k:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x04:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-m68k:' > /proc/sys/fs/binfmt_misc/register
>>> -fi
>>> -if [ $cpu != "mips" ] ; then
>>> -    # FIXME: We could use the other endianness on a MIPS host.
>>> -    echo   ':mips:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-mips:' > /proc/sys/fs/binfmt_misc/register
>>> -    echo   ':mipsel:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-mipsel:' > /proc/sys/fs/binfmt_misc/register
>>> -    echo   ':mipsn32:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-mipsn32:' > /proc/sys/fs/binfmt_misc/register
>>> -    echo   ':mipsn32el:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-mipsn32el:' > /proc/sys/fs/binfmt_misc/register
>>> -    echo   ':mips64:M::\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-mips64:' > /proc/sys/fs/binfmt_misc/register
>>> -    echo   ':mips64el:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-mips64el:' > /proc/sys/fs/binfmt_misc/register
>>> -fi
>>> -if [ $cpu != "sh" ] ; then
>>> -    echo    ':sh4:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a\x00:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-sh4:' > /proc/sys/fs/binfmt_misc/register
>>> -    echo    ':sh4eb:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-sh4eb:' > /proc/sys/fs/binfmt_misc/register
>>> -fi
>>> -if [ $cpu != "s390x" ] ; then
>>> -    echo   ':s390x:M::\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x16:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-s390x:' > /proc/sys/fs/binfmt_misc/register
>>> -fi
>>> +qemu_target_list="i386 i486 alpha arm sparc32plus ppc ppc64 ppc64le m68k \
>>> +mips mipsel mipsn32 mipsn32el mips64 mips64el \
>>> +sh4 sh4eb s390x aarch64"
>>> +
>>> +i386_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00'
>>> +i386_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>>> +i386_family=i386
>>> +
>>> +i486_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x06\x00'
>>> +i486_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>>> +i486_family=i386
>>> +
>>> +alpha_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x26\x90'
>>> +alpha_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>>> +alpha_family=alpha
>>> +
>>> +arm_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00'
>>> +arm_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>>> +arm_family=arm
>>> +
>>> +armeb_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28'
>>> +armeb_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>> +armeb_family=arm
>>> +
>>> +sparc_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02'
>>> +sparc_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>> +sparc_family=sparc
>>> +
>>> +sparc32plus_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x12'
>>> +sparc32plus_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>> +sparc32plus_family=sparc
>>> +
>>> +ppc_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x14'
>>> +ppc_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>> +ppc_family=ppc
>>> +
>>> +ppc64_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15'
>>> +ppc64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>> +ppc64_family=ppc
>>> +
>>> +ppc64le_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15\x00'
>>> +ppc64le_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\x00'
>>> +ppc64le_family=ppcle
>>> +
>>> +m68k_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x04'
>>> +m68k_mask='\xff\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>> +m68k_family=m68k
>>> +
>>> +# FIXME: We could use the other endianness on a MIPS host.
>>> +
>>> +mips_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
>>> +mips_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>> +mips_family=mips
>>> +
>>> +mipsel_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
>>> +mipsel_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>>> +mipsel_family=mips
>>> +
>>> +mipsn32_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
>>> +mipsn32_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>> +mipsn32_family=mips
>>> +
>>> +mipsn32el_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
>>> +mipsn32el_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>>> +mipsn32el_family=mips
>>> +
>>> +mips64_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
>>> +mips64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>> +mips64_family=mips
>>> +
>>> +mips64el_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
>>> +mips64el_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>>> +mips64el_family=mips
>>> +
>>> +sh4_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a\x00'
>>> +sh4_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>>> +sh4_family=sh4
>>> +
>>> +sh4eb_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a'
>>> +sh4eb_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>> +sh4eb_family=sh4
>>> +
>>> +s390x_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x16'
>>> +s390x_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>> +s390x_family=s390x
>>> +
>>> +aarch64_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00'
>>> +aarch64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>>> +aarch64_family=arm
>>> +
>>> +qemu_get_family() {
>>> +    cpu=${HOST_ARCH:-$(uname -m)}
>>> +    case "$cpu" in
>>> +    amd64|i386|i486|i586|i686|i86pc|BePC|x86_64)
>>> +        echo "i386"
>>> +        ;;
>>> +    mips*)
>>> +        echo "mips"
>>> +        ;;
>>> +    "Power Macintosh"|ppc64|powerpc|ppc)
>>> +        echo "ppc"
>>> +        ;;
>>> +    ppc64el|ppc64le)
>>> +        echo "ppcle"
>>> +        ;;
>>> +    arm|armel|armhf|arm64|armv[4-9]*)
>>> +        echo "arm"
>>> +        ;;
>>> +    sparc*)
>>> +        echo "sparc"
>>> +        ;;
>>> +    *)
>>> +        echo "$cpu"
>>> +        ;;
>>> +    esac
>>> +}
>>> +
>>> +usage() {
>>> +    cat <<EOF
>>> +Usage: qemu-binfmt-conf.sh [--qemu-path PATH][--debian][--systemd CPU]
>>> +                           [--help][--credential yes|no][--exportdir PATH]
>>> +
>>> +       Configure binfmt_misc to use qemu interpreter
>>> +
>>> +       --help:       display this usage
>>> +       --qemu-path:  set path to qemu interpreter ($QEMU_PATH)
>>> +       --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: $SYSTEMDDIR or $DEBIANDIR)
>>> +       --credential: if yes, credential and security tokens are
>>> +                     calculated according to the binary to interpret
>>> +
>>> +    To import templates with update-binfmts, use :
>>> +
>>> +        sudo update-binfmts --importdir ${EXPORTDIR:-$DEBIANDIR} --import qemu-CPU
>>> +
>>> +    To remove interpreter, use :
>>> +
>>> +        sudo update-binfmts --package qemu-CPU --remove qemu-CPU $QEMU_PATH
>>> +
>>> +    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.
>>> +
>>> +    where CPU is one of:
>>> +
>>> +        $qemu_target_list
>>> +
>>> +EOF
>>> +}
>>> +
>>> +qemu_check_access() {
>>> +    if [ ! -w "$1" ] ; then
>>> +        echo "ERROR: cannot write to $1" 1>&2
>>> +        exit 1
>>> +    fi
>>> +}
>>> +
>>> +qemu_check_bintfmt_misc() {
>>> +    # load the binfmt_misc module
>>> +    if [ ! -d /proc/sys/fs/binfmt_misc ]; then
>>> +      if ! /sbin/modprobe binfmt_misc ; then
>>> +          exit 1
>>> +      fi
>>> +    fi
>>> +    if [ ! -f /proc/sys/fs/binfmt_misc/register ]; then
>>> +      if ! mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc ; then
>>> +          exit 1
>>> +      fi
>>> +    fi
>>> +
>>> +    qemu_check_access /proc/sys/fs/binfmt_misc/register
>>> +}
>>> +
>>> +installed_dpkg() {
>>> +    dpkg --status "$1" > /dev/null 2>&1
>>> +}
>>> +
>>> +qemu_check_debian() {
>>> +    if [ ! -e /etc/debian_version ] ; then
>>> +        echo "WARNING: your system is not a Debian based distro" 1>&2
>>> +    elif ! installed_dpkg binfmt-support ; then
>>> +        echo "WARNING: package binfmt-support is needed" 1>&2
>>> +    fi
>>> +    qemu_check_access "$EXPORTDIR"
>>> +}
>>> +
>>> +qemu_check_systemd() {
>>> +    if ! systemctl -q is-enabled systemd-binfmt.service ; then
>>> +        echo "WARNING: systemd-binfmt.service is missing or disabled" 1>&2
>>> +    fi
>>> +    qemu_check_access "$EXPORTDIR"
>>> +}
>>> +
>>> +qemu_generate_register() {
>>> +    echo ":qemu-$cpu:M::$magic:$mask:$qemu:$FLAGS"
>>> +}
>>> +
>>> +qemu_register_interpreter() {
>>> +    echo "Setting $qemu as binfmt interpreter for $cpu"
>>> +    qemu_generate_register > /proc/sys/fs/binfmt_misc/register
>>> +}
>>> +
>>> +qemu_generate_systemd() {
>>> +    echo "Setting $qemu as binfmt interpreter for $cpu for systemd-binfmt.service"
>>> +    qemu_generate_register > "$EXPORTDIR/qemu-$cpu.conf"
>>> +}
>>> +
>>> +qemu_generate_debian() {
>>> +    cat > "$EXPORTDIR/qemu-$cpu" <<EOF
>>> +package qemu-$cpu
>>> +interpreter $qemu
>>> +magic $magic
>>> +mask $mask
>>> +EOF
>>> +    if [ "$FLAGS" = "OC" ] ; then
>>> +        echo "credentials yes" >> "$EXPORTDIR/qemu-$cpu"
>>> +    fi
>>> +}
>>> +
>>> +qemu_set_binfmts() {
>>> +    # probe cpu type
>>> +    host_family=$(qemu_get_family)
>>> +
>>> +    # register the interpreter for each cpu except for the native one
>>> +
>>> +    for cpu in ${qemu_target_list} ; do
>>> +        magic=$(eval echo \$${cpu}_magic)
>>> +        mask=$(eval echo \$${cpu}_mask)
>>> +        family=$(eval echo \$${cpu}_family)
>>> +
>>> +        if [ "$magic" = "" ] || [ "$mask" = "" ] || [ "$family" = "" ] ; then
>>> +            echo "INTERNAL ERROR: unknown cpu $cpu" 1>&2
>>> +            continue
>>> +        fi
>>> +
>>> +        qemu="$QEMU_PATH/qemu-$cpu"
>>> +        if [ "$cpu" = "i486" ] ; then
>>> +            qemu="$QEMU_PATH/qemu-i386"
>>> +        fi
>>> +
>>> +        if [ "$host_family" != "$family" ] ; then
>>> +            $BINFMT_SET
>>> +        fi
>>> +    done
>>> +}
>>> +
>>> +CHECK=qemu_check_bintfmt_misc
>>> +BINFMT_SET=qemu_register_interpreter
>>> +
>>> +SYSTEMDDIR="/etc/binfmt.d"
>>> +DEBIANDIR="/usr/share/binfmts"
>>> +
>>> +QEMU_PATH=/usr/local/bin
>>> +FLAGS=""
>>> +
>>> +options=$(getopt -o ds:Q:e:hc: -l debian,systemd:,qemu-path:,exportdir:,help,credential: -- "$@")
>>> +eval set -- "$options"
>>> +
>>> +while true ; do
>>> +    case "$1" in
>>> +    -d|--debian)
>>> +        CHECK=qemu_check_debian
>>> +        BINFMT_SET=qemu_generate_debian
>>> +        EXPORTDIR=${EXPORTDIR:-$DEBIANDIR}
>>> +        ;;
>>> +    -s|--systemd)
>>> +        CHECK=qemu_check_systemd
>>> +        BINFMT_SET=qemu_generate_systemd
>>> +        EXPORTDIR=${EXPORTDIR:-$SYSTEMDDIR}
>>> +        shift
>>> +        # check given cpu is in the supported CPU list
>>> +        for cpu in ${qemu_target_list} ; do
>>> +            if [ "$cpu" == "$1" ] ; then
>>> +                break
>>> +            fi
>>> +        done
>>> +
>>> +        if [ "$cpu" == "$1" ] ; then
>>> +            qemu_target_list="$1"
>>> +        else
>>> +            echo "ERROR: unknown CPU \"$1\"" 1>&2
>>> +            usage
>>> +            exit 1
>>> +        fi
>>> +        ;;
>>> +    -Q|--qemu-path)
>>> +        shift
>>> +        QEMU_PATH="$1"
>>> +        ;;
>>> +    -e|--exportdir)
>>> +        shift
>>> +        EXPORTDIR="$1"
>>> +        ;;
>>> +    -h|--help)
>>> +        usage
>>> +        exit 1
>>> +        ;;
>>> +    -c|--credential)
>>> +        shift
>>> +        if [ "$1" = "yes" ] ; then
>>> +            FLAGS="OC"
>>> +        else
>>> +            FLAGS=""
>>> +        fi
>>> +        ;;
>>> +    *)
>>> +        break
>>> +        ;;
>>> +    esac
>>> +    shift
>>> +done
>>> +
>>> +$CHECK
>>> +qemu_set_binfmts
>>>
>
Laurent Vivier May 25, 2016, 3:51 p.m. UTC | #4
Le 25/02/2016 à 17:28, Laurent Vivier a écrit :
> Please, Alex, Michael:
> 
> We need your ack/review.

Someone? :)

Thanks,
Laurent

> Thanks,
> Laurent
> 
> Le 17/02/2016 10:59, Riku Voipio a écrit :
>> Hi,
>>
>> On 16 February 2016 at 00:47, Laurent Vivier <laurent@vivier.eu> wrote:
>>> Ping?
>>
>> It looks good to me. But I'd like to see some ack/review from
>> Alexander or Michael.
>>
>> Riku
>>
>>> Le 29/01/2016 17:07, Laurent Vivier a écrit :
>>>> Original qemu-binfmt-conf.h 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>
>>>> ---
>>>> v3: change subject to be shorter
>>>>     fix typo
>>>>     remove "!EOF", "echo -n" and "[ ... -o ... ]"
>>>>     check cpu given by --systemd is in the list
>>>> v2: replace some ERRORS by WARNINGS to be able to use the script inside a package build
>>>>     check only the right to write in the directory, no need to be root
>>>>     merge systemd and binfmt_misc configuration generation
>>>>     s/qemu_generate_packages/qemu_generate_debian/
>>>>     add support of HOST_ARCH from debian, and update CPU families.
>>>>     allow to use --exportdir with --systemd and update "Usage".
>>>>
>>>>  scripts/qemu-binfmt-conf.sh | 389 ++++++++++++++++++++++++++++++++++++--------
>>>>  1 file changed, 320 insertions(+), 69 deletions(-)
>>>>  mode change 100644 => 100755 scripts/qemu-binfmt-conf.sh
>>>>
>>>> diff --git a/scripts/qemu-binfmt-conf.sh b/scripts/qemu-binfmt-conf.sh
>>>> old mode 100644
>>>> new mode 100755
>>>> index 289b1a3..de4d1c1
>>>> --- a/scripts/qemu-binfmt-conf.sh
>>>> +++ b/scripts/qemu-binfmt-conf.sh
>>>> @@ -1,72 +1,323 @@
>>>>  #!/bin/sh
>>>>  # enable automatic i386/ARM/M68K/MIPS/SPARC/PPC/s390 program execution by the kernel
>>>>
>>>> -# load the binfmt_misc module
>>>> -if [ ! -d /proc/sys/fs/binfmt_misc ]; then
>>>> -  /sbin/modprobe binfmt_misc
>>>> -fi
>>>> -if [ ! -f /proc/sys/fs/binfmt_misc/register ]; then
>>>> -  mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc
>>>> -fi
>>>> -
>>>> -# probe cpu type
>>>> -cpu=`uname -m`
>>>> -case "$cpu" in
>>>> -  i386|i486|i586|i686|i86pc|BePC|x86_64)
>>>> -    cpu="i386"
>>>> -  ;;
>>>> -  m68k)
>>>> -    cpu="m68k"
>>>> -  ;;
>>>> -  mips*)
>>>> -    cpu="mips"
>>>> -  ;;
>>>> -  "Power Macintosh"|ppc|ppc64)
>>>> -    cpu="ppc"
>>>> -  ;;
>>>> -  armv[4-9]*)
>>>> -    cpu="arm"
>>>> -  ;;
>>>> -esac
>>>> -
>>>> -# register the interpreter for each cpu except for the native one
>>>> -if [ $cpu != "i386" ] ; then
>>>> -    echo ':i386:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00:\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-i386:' > /proc/sys/fs/binfmt_misc/register
>>>> -    echo ':i486:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x06\x00:\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-i386:' > /proc/sys/fs/binfmt_misc/register
>>>> -fi
>>>> -if [ $cpu != "alpha" ] ; then
>>>> -    echo ':alpha:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x26\x90:\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-alpha:' > /proc/sys/fs/binfmt_misc/register
>>>> -fi
>>>> -if [ $cpu != "arm" ] ; then
>>>> -    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/local/bin/qemu-arm:' > /proc/sys/fs/binfmt_misc/register
>>>> -    echo   ':armeb:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-armeb:' > /proc/sys/fs/binfmt_misc/register
>>>> -fi
>>>> -if [ $cpu != "aarch64" ] ; then
>>>> -    echo ':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/local/bin/qemu-aarch64:' > /proc/sys/fs/binfmt_misc/register
>>>> -fi
>>>> -if [ $cpu != "sparc" ] ; then
>>>> -    echo   ':sparc:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-sparc:' > /proc/sys/fs/binfmt_misc/register
>>>> -fi
>>>> -if [ $cpu != "ppc" ] ; then
>>>> -    echo   ':ppc:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x14:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-ppc:' > /proc/sys/fs/binfmt_misc/register
>>>> -fi
>>>> -if [ $cpu != "m68k" ] ; then
>>>> -    echo   'Please check cpu value and header information for m68k!'
>>>> -    echo   ':m68k:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x04:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-m68k:' > /proc/sys/fs/binfmt_misc/register
>>>> -fi
>>>> -if [ $cpu != "mips" ] ; then
>>>> -    # FIXME: We could use the other endianness on a MIPS host.
>>>> -    echo   ':mips:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-mips:' > /proc/sys/fs/binfmt_misc/register
>>>> -    echo   ':mipsel:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-mipsel:' > /proc/sys/fs/binfmt_misc/register
>>>> -    echo   ':mipsn32:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-mipsn32:' > /proc/sys/fs/binfmt_misc/register
>>>> -    echo   ':mipsn32el:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-mipsn32el:' > /proc/sys/fs/binfmt_misc/register
>>>> -    echo   ':mips64:M::\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-mips64:' > /proc/sys/fs/binfmt_misc/register
>>>> -    echo   ':mips64el:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-mips64el:' > /proc/sys/fs/binfmt_misc/register
>>>> -fi
>>>> -if [ $cpu != "sh" ] ; then
>>>> -    echo    ':sh4:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a\x00:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-sh4:' > /proc/sys/fs/binfmt_misc/register
>>>> -    echo    ':sh4eb:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-sh4eb:' > /proc/sys/fs/binfmt_misc/register
>>>> -fi
>>>> -if [ $cpu != "s390x" ] ; then
>>>> -    echo   ':s390x:M::\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x16:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-s390x:' > /proc/sys/fs/binfmt_misc/register
>>>> -fi
>>>> +qemu_target_list="i386 i486 alpha arm sparc32plus ppc ppc64 ppc64le m68k \
>>>> +mips mipsel mipsn32 mipsn32el mips64 mips64el \
>>>> +sh4 sh4eb s390x aarch64"
>>>> +
>>>> +i386_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00'
>>>> +i386_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>>>> +i386_family=i386
>>>> +
>>>> +i486_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x06\x00'
>>>> +i486_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>>>> +i486_family=i386
>>>> +
>>>> +alpha_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x26\x90'
>>>> +alpha_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>>>> +alpha_family=alpha
>>>> +
>>>> +arm_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00'
>>>> +arm_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>>>> +arm_family=arm
>>>> +
>>>> +armeb_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28'
>>>> +armeb_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>>> +armeb_family=arm
>>>> +
>>>> +sparc_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02'
>>>> +sparc_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>>> +sparc_family=sparc
>>>> +
>>>> +sparc32plus_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x12'
>>>> +sparc32plus_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>>> +sparc32plus_family=sparc
>>>> +
>>>> +ppc_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x14'
>>>> +ppc_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>>> +ppc_family=ppc
>>>> +
>>>> +ppc64_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15'
>>>> +ppc64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>>> +ppc64_family=ppc
>>>> +
>>>> +ppc64le_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15\x00'
>>>> +ppc64le_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\x00'
>>>> +ppc64le_family=ppcle
>>>> +
>>>> +m68k_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x04'
>>>> +m68k_mask='\xff\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>>> +m68k_family=m68k
>>>> +
>>>> +# FIXME: We could use the other endianness on a MIPS host.
>>>> +
>>>> +mips_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
>>>> +mips_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>>> +mips_family=mips
>>>> +
>>>> +mipsel_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
>>>> +mipsel_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>>>> +mipsel_family=mips
>>>> +
>>>> +mipsn32_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
>>>> +mipsn32_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>>> +mipsn32_family=mips
>>>> +
>>>> +mipsn32el_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
>>>> +mipsn32el_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>>>> +mipsn32el_family=mips
>>>> +
>>>> +mips64_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
>>>> +mips64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>>> +mips64_family=mips
>>>> +
>>>> +mips64el_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
>>>> +mips64el_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>>>> +mips64el_family=mips
>>>> +
>>>> +sh4_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a\x00'
>>>> +sh4_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>>>> +sh4_family=sh4
>>>> +
>>>> +sh4eb_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a'
>>>> +sh4eb_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>>> +sh4eb_family=sh4
>>>> +
>>>> +s390x_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x16'
>>>> +s390x_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
>>>> +s390x_family=s390x
>>>> +
>>>> +aarch64_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00'
>>>> +aarch64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
>>>> +aarch64_family=arm
>>>> +
>>>> +qemu_get_family() {
>>>> +    cpu=${HOST_ARCH:-$(uname -m)}
>>>> +    case "$cpu" in
>>>> +    amd64|i386|i486|i586|i686|i86pc|BePC|x86_64)
>>>> +        echo "i386"
>>>> +        ;;
>>>> +    mips*)
>>>> +        echo "mips"
>>>> +        ;;
>>>> +    "Power Macintosh"|ppc64|powerpc|ppc)
>>>> +        echo "ppc"
>>>> +        ;;
>>>> +    ppc64el|ppc64le)
>>>> +        echo "ppcle"
>>>> +        ;;
>>>> +    arm|armel|armhf|arm64|armv[4-9]*)
>>>> +        echo "arm"
>>>> +        ;;
>>>> +    sparc*)
>>>> +        echo "sparc"
>>>> +        ;;
>>>> +    *)
>>>> +        echo "$cpu"
>>>> +        ;;
>>>> +    esac
>>>> +}
>>>> +
>>>> +usage() {
>>>> +    cat <<EOF
>>>> +Usage: qemu-binfmt-conf.sh [--qemu-path PATH][--debian][--systemd CPU]
>>>> +                           [--help][--credential yes|no][--exportdir PATH]
>>>> +
>>>> +       Configure binfmt_misc to use qemu interpreter
>>>> +
>>>> +       --help:       display this usage
>>>> +       --qemu-path:  set path to qemu interpreter ($QEMU_PATH)
>>>> +       --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: $SYSTEMDDIR or $DEBIANDIR)
>>>> +       --credential: if yes, credential and security tokens are
>>>> +                     calculated according to the binary to interpret
>>>> +
>>>> +    To import templates with update-binfmts, use :
>>>> +
>>>> +        sudo update-binfmts --importdir ${EXPORTDIR:-$DEBIANDIR} --import qemu-CPU
>>>> +
>>>> +    To remove interpreter, use :
>>>> +
>>>> +        sudo update-binfmts --package qemu-CPU --remove qemu-CPU $QEMU_PATH
>>>> +
>>>> +    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.
>>>> +
>>>> +    where CPU is one of:
>>>> +
>>>> +        $qemu_target_list
>>>> +
>>>> +EOF
>>>> +}
>>>> +
>>>> +qemu_check_access() {
>>>> +    if [ ! -w "$1" ] ; then
>>>> +        echo "ERROR: cannot write to $1" 1>&2
>>>> +        exit 1
>>>> +    fi
>>>> +}
>>>> +
>>>> +qemu_check_bintfmt_misc() {
>>>> +    # load the binfmt_misc module
>>>> +    if [ ! -d /proc/sys/fs/binfmt_misc ]; then
>>>> +      if ! /sbin/modprobe binfmt_misc ; then
>>>> +          exit 1
>>>> +      fi
>>>> +    fi
>>>> +    if [ ! -f /proc/sys/fs/binfmt_misc/register ]; then
>>>> +      if ! mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc ; then
>>>> +          exit 1
>>>> +      fi
>>>> +    fi
>>>> +
>>>> +    qemu_check_access /proc/sys/fs/binfmt_misc/register
>>>> +}
>>>> +
>>>> +installed_dpkg() {
>>>> +    dpkg --status "$1" > /dev/null 2>&1
>>>> +}
>>>> +
>>>> +qemu_check_debian() {
>>>> +    if [ ! -e /etc/debian_version ] ; then
>>>> +        echo "WARNING: your system is not a Debian based distro" 1>&2
>>>> +    elif ! installed_dpkg binfmt-support ; then
>>>> +        echo "WARNING: package binfmt-support is needed" 1>&2
>>>> +    fi
>>>> +    qemu_check_access "$EXPORTDIR"
>>>> +}
>>>> +
>>>> +qemu_check_systemd() {
>>>> +    if ! systemctl -q is-enabled systemd-binfmt.service ; then
>>>> +        echo "WARNING: systemd-binfmt.service is missing or disabled" 1>&2
>>>> +    fi
>>>> +    qemu_check_access "$EXPORTDIR"
>>>> +}
>>>> +
>>>> +qemu_generate_register() {
>>>> +    echo ":qemu-$cpu:M::$magic:$mask:$qemu:$FLAGS"
>>>> +}
>>>> +
>>>> +qemu_register_interpreter() {
>>>> +    echo "Setting $qemu as binfmt interpreter for $cpu"
>>>> +    qemu_generate_register > /proc/sys/fs/binfmt_misc/register
>>>> +}
>>>> +
>>>> +qemu_generate_systemd() {
>>>> +    echo "Setting $qemu as binfmt interpreter for $cpu for systemd-binfmt.service"
>>>> +    qemu_generate_register > "$EXPORTDIR/qemu-$cpu.conf"
>>>> +}
>>>> +
>>>> +qemu_generate_debian() {
>>>> +    cat > "$EXPORTDIR/qemu-$cpu" <<EOF
>>>> +package qemu-$cpu
>>>> +interpreter $qemu
>>>> +magic $magic
>>>> +mask $mask
>>>> +EOF
>>>> +    if [ "$FLAGS" = "OC" ] ; then
>>>> +        echo "credentials yes" >> "$EXPORTDIR/qemu-$cpu"
>>>> +    fi
>>>> +}
>>>> +
>>>> +qemu_set_binfmts() {
>>>> +    # probe cpu type
>>>> +    host_family=$(qemu_get_family)
>>>> +
>>>> +    # register the interpreter for each cpu except for the native one
>>>> +
>>>> +    for cpu in ${qemu_target_list} ; do
>>>> +        magic=$(eval echo \$${cpu}_magic)
>>>> +        mask=$(eval echo \$${cpu}_mask)
>>>> +        family=$(eval echo \$${cpu}_family)
>>>> +
>>>> +        if [ "$magic" = "" ] || [ "$mask" = "" ] || [ "$family" = "" ] ; then
>>>> +            echo "INTERNAL ERROR: unknown cpu $cpu" 1>&2
>>>> +            continue
>>>> +        fi
>>>> +
>>>> +        qemu="$QEMU_PATH/qemu-$cpu"
>>>> +        if [ "$cpu" = "i486" ] ; then
>>>> +            qemu="$QEMU_PATH/qemu-i386"
>>>> +        fi
>>>> +
>>>> +        if [ "$host_family" != "$family" ] ; then
>>>> +            $BINFMT_SET
>>>> +        fi
>>>> +    done
>>>> +}
>>>> +
>>>> +CHECK=qemu_check_bintfmt_misc
>>>> +BINFMT_SET=qemu_register_interpreter
>>>> +
>>>> +SYSTEMDDIR="/etc/binfmt.d"
>>>> +DEBIANDIR="/usr/share/binfmts"
>>>> +
>>>> +QEMU_PATH=/usr/local/bin
>>>> +FLAGS=""
>>>> +
>>>> +options=$(getopt -o ds:Q:e:hc: -l debian,systemd:,qemu-path:,exportdir:,help,credential: -- "$@")
>>>> +eval set -- "$options"
>>>> +
>>>> +while true ; do
>>>> +    case "$1" in
>>>> +    -d|--debian)
>>>> +        CHECK=qemu_check_debian
>>>> +        BINFMT_SET=qemu_generate_debian
>>>> +        EXPORTDIR=${EXPORTDIR:-$DEBIANDIR}
>>>> +        ;;
>>>> +    -s|--systemd)
>>>> +        CHECK=qemu_check_systemd
>>>> +        BINFMT_SET=qemu_generate_systemd
>>>> +        EXPORTDIR=${EXPORTDIR:-$SYSTEMDDIR}
>>>> +        shift
>>>> +        # check given cpu is in the supported CPU list
>>>> +        for cpu in ${qemu_target_list} ; do
>>>> +            if [ "$cpu" == "$1" ] ; then
>>>> +                break
>>>> +            fi
>>>> +        done
>>>> +
>>>> +        if [ "$cpu" == "$1" ] ; then
>>>> +            qemu_target_list="$1"
>>>> +        else
>>>> +            echo "ERROR: unknown CPU \"$1\"" 1>&2
>>>> +            usage
>>>> +            exit 1
>>>> +        fi
>>>> +        ;;
>>>> +    -Q|--qemu-path)
>>>> +        shift
>>>> +        QEMU_PATH="$1"
>>>> +        ;;
>>>> +    -e|--exportdir)
>>>> +        shift
>>>> +        EXPORTDIR="$1"
>>>> +        ;;
>>>> +    -h|--help)
>>>> +        usage
>>>> +        exit 1
>>>> +        ;;
>>>> +    -c|--credential)
>>>> +        shift
>>>> +        if [ "$1" = "yes" ] ; then
>>>> +            FLAGS="OC"
>>>> +        else
>>>> +            FLAGS=""
>>>> +        fi
>>>> +        ;;
>>>> +    *)
>>>> +        break
>>>> +        ;;
>>>> +    esac
>>>> +    shift
>>>> +done
>>>> +
>>>> +$CHECK
>>>> +qemu_set_binfmts
>>>>
>>
>
Alexander Graf May 27, 2016, 1:56 p.m. UTC | #5
On 05/25/2016 05:51 PM, Laurent Vivier wrote:
>
> Le 25/02/2016 à 17:28, Laurent Vivier a écrit :
>> Please, Alex, Michael:
>>
>> We need your ack/review.
> Someone? :)

It's definitely an improvement over today's situation.

Reviewed-by: Alexander Graf <agraf@suse.de>


Alex
Riku Voipio May 31, 2016, 5:46 a.m. UTC | #6
On 27 May 2016 at 16:56, Alexander Graf <agraf@suse.de> wrote:
> On 05/25/2016 05:51 PM, Laurent Vivier wrote:
>>
>>
>> Le 25/02/2016 à 17:28, Laurent Vivier a écrit :
>>>
>>> Please, Alex, Michael:
>>>
>>> We need your ack/review.
>>
>> Someone? :)

> It's definitely an improvement over today's situation.

> Reviewed-by: Alexander Graf <agraf@suse.de>

Applied to linux-user que, thanks

Riku
Laurent Vivier May 31, 2016, 6:51 a.m. UTC | #7
Le 31/05/2016 à 07:46, Riku Voipio a écrit :
> On 27 May 2016 at 16:56, Alexander Graf <agraf@suse.de> wrote:
>> On 05/25/2016 05:51 PM, Laurent Vivier wrote:
>>>
>>>
>>> Le 25/02/2016 à 17:28, Laurent Vivier a écrit :
>>>>
>>>> Please, Alex, Michael:
>>>>
>>>> We need your ack/review.
>>>
>>> Someone? :)
> 
>> It's definitely an improvement over today's situation.
> 
>> Reviewed-by: Alexander Graf <agraf@suse.de>
> 
> Applied to linux-user que, thanks

Thanks,

[Could you update the commit message to change "qemu-binfmt-conf.h" by
"qemu-binfmt-conf.sh"?]

Laurent
diff mbox

Patch

diff --git a/scripts/qemu-binfmt-conf.sh b/scripts/qemu-binfmt-conf.sh
old mode 100644
new mode 100755
index 289b1a3..de4d1c1
--- a/scripts/qemu-binfmt-conf.sh
+++ b/scripts/qemu-binfmt-conf.sh
@@ -1,72 +1,323 @@ 
 #!/bin/sh
 # enable automatic i386/ARM/M68K/MIPS/SPARC/PPC/s390 program execution by the kernel
 
-# load the binfmt_misc module
-if [ ! -d /proc/sys/fs/binfmt_misc ]; then
-  /sbin/modprobe binfmt_misc
-fi
-if [ ! -f /proc/sys/fs/binfmt_misc/register ]; then
-  mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc
-fi
-
-# probe cpu type
-cpu=`uname -m`
-case "$cpu" in
-  i386|i486|i586|i686|i86pc|BePC|x86_64)
-    cpu="i386"
-  ;;
-  m68k)
-    cpu="m68k"
-  ;;
-  mips*)
-    cpu="mips"
-  ;;
-  "Power Macintosh"|ppc|ppc64)
-    cpu="ppc"
-  ;;
-  armv[4-9]*)
-    cpu="arm"
-  ;;
-esac
-
-# register the interpreter for each cpu except for the native one
-if [ $cpu != "i386" ] ; then
-    echo ':i386:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00:\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-i386:' > /proc/sys/fs/binfmt_misc/register
-    echo ':i486:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x06\x00:\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-i386:' > /proc/sys/fs/binfmt_misc/register
-fi
-if [ $cpu != "alpha" ] ; then
-    echo ':alpha:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x26\x90:\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-alpha:' > /proc/sys/fs/binfmt_misc/register
-fi
-if [ $cpu != "arm" ] ; then
-    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/local/bin/qemu-arm:' > /proc/sys/fs/binfmt_misc/register
-    echo   ':armeb:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-armeb:' > /proc/sys/fs/binfmt_misc/register
-fi
-if [ $cpu != "aarch64" ] ; then
-    echo ':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/local/bin/qemu-aarch64:' > /proc/sys/fs/binfmt_misc/register
-fi
-if [ $cpu != "sparc" ] ; then
-    echo   ':sparc:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-sparc:' > /proc/sys/fs/binfmt_misc/register
-fi
-if [ $cpu != "ppc" ] ; then
-    echo   ':ppc:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x14:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-ppc:' > /proc/sys/fs/binfmt_misc/register
-fi
-if [ $cpu != "m68k" ] ; then
-    echo   'Please check cpu value and header information for m68k!'
-    echo   ':m68k:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x04:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-m68k:' > /proc/sys/fs/binfmt_misc/register
-fi
-if [ $cpu != "mips" ] ; then
-    # FIXME: We could use the other endianness on a MIPS host.
-    echo   ':mips:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-mips:' > /proc/sys/fs/binfmt_misc/register
-    echo   ':mipsel:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-mipsel:' > /proc/sys/fs/binfmt_misc/register
-    echo   ':mipsn32:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-mipsn32:' > /proc/sys/fs/binfmt_misc/register
-    echo   ':mipsn32el:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-mipsn32el:' > /proc/sys/fs/binfmt_misc/register
-    echo   ':mips64:M::\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-mips64:' > /proc/sys/fs/binfmt_misc/register
-    echo   ':mips64el:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-mips64el:' > /proc/sys/fs/binfmt_misc/register
-fi
-if [ $cpu != "sh" ] ; then
-    echo    ':sh4:M::\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a\x00:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/local/bin/qemu-sh4:' > /proc/sys/fs/binfmt_misc/register
-    echo    ':sh4eb:M::\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-sh4eb:' > /proc/sys/fs/binfmt_misc/register
-fi
-if [ $cpu != "s390x" ] ; then
-    echo   ':s390x:M::\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x16:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/local/bin/qemu-s390x:' > /proc/sys/fs/binfmt_misc/register
-fi
+qemu_target_list="i386 i486 alpha arm sparc32plus ppc ppc64 ppc64le m68k \
+mips mipsel mipsn32 mipsn32el mips64 mips64el \
+sh4 sh4eb s390x aarch64"
+
+i386_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00'
+i386_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
+i386_family=i386
+
+i486_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x06\x00'
+i486_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
+i486_family=i386
+
+alpha_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x26\x90'
+alpha_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
+alpha_family=alpha
+
+arm_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00'
+arm_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
+arm_family=arm
+
+armeb_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28'
+armeb_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
+armeb_family=arm
+
+sparc_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02'
+sparc_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
+sparc_family=sparc
+
+sparc32plus_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x12'
+sparc32plus_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
+sparc32plus_family=sparc
+
+ppc_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x14'
+ppc_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
+ppc_family=ppc
+
+ppc64_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15'
+ppc64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
+ppc64_family=ppc
+
+ppc64le_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15\x00'
+ppc64le_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\x00'
+ppc64le_family=ppcle
+
+m68k_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x04'
+m68k_mask='\xff\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
+m68k_family=m68k
+
+# FIXME: We could use the other endianness on a MIPS host.
+
+mips_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
+mips_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
+mips_family=mips
+
+mipsel_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
+mipsel_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
+mipsel_family=mips
+
+mipsn32_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
+mipsn32_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
+mipsn32_family=mips
+
+mipsn32el_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
+mipsn32el_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
+mipsn32el_family=mips
+
+mips64_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
+mips64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
+mips64_family=mips
+
+mips64el_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
+mips64el_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
+mips64el_family=mips
+
+sh4_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a\x00'
+sh4_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
+sh4_family=sh4
+
+sh4eb_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a'
+sh4eb_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
+sh4eb_family=sh4
+
+s390x_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x16'
+s390x_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
+s390x_family=s390x
+
+aarch64_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00'
+aarch64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
+aarch64_family=arm
+
+qemu_get_family() {
+    cpu=${HOST_ARCH:-$(uname -m)}
+    case "$cpu" in
+    amd64|i386|i486|i586|i686|i86pc|BePC|x86_64)
+        echo "i386"
+        ;;
+    mips*)
+        echo "mips"
+        ;;
+    "Power Macintosh"|ppc64|powerpc|ppc)
+        echo "ppc"
+        ;;
+    ppc64el|ppc64le)
+        echo "ppcle"
+        ;;
+    arm|armel|armhf|arm64|armv[4-9]*)
+        echo "arm"
+        ;;
+    sparc*)
+        echo "sparc"
+        ;;
+    *)
+        echo "$cpu"
+        ;;
+    esac
+}
+
+usage() {
+    cat <<EOF
+Usage: qemu-binfmt-conf.sh [--qemu-path PATH][--debian][--systemd CPU]
+                           [--help][--credential yes|no][--exportdir PATH]
+
+       Configure binfmt_misc to use qemu interpreter
+
+       --help:       display this usage
+       --qemu-path:  set path to qemu interpreter ($QEMU_PATH)
+       --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: $SYSTEMDDIR or $DEBIANDIR)
+       --credential: if yes, credential and security tokens are
+                     calculated according to the binary to interpret
+
+    To import templates with update-binfmts, use :
+
+        sudo update-binfmts --importdir ${EXPORTDIR:-$DEBIANDIR} --import qemu-CPU
+
+    To remove interpreter, use :
+
+        sudo update-binfmts --package qemu-CPU --remove qemu-CPU $QEMU_PATH
+
+    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.
+
+    where CPU is one of:
+
+        $qemu_target_list
+
+EOF
+}
+
+qemu_check_access() {
+    if [ ! -w "$1" ] ; then
+        echo "ERROR: cannot write to $1" 1>&2
+        exit 1
+    fi
+}
+
+qemu_check_bintfmt_misc() {
+    # load the binfmt_misc module
+    if [ ! -d /proc/sys/fs/binfmt_misc ]; then
+      if ! /sbin/modprobe binfmt_misc ; then
+          exit 1
+      fi
+    fi
+    if [ ! -f /proc/sys/fs/binfmt_misc/register ]; then
+      if ! mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc ; then
+          exit 1
+      fi
+    fi
+
+    qemu_check_access /proc/sys/fs/binfmt_misc/register
+}
+
+installed_dpkg() {
+    dpkg --status "$1" > /dev/null 2>&1
+}
+
+qemu_check_debian() {
+    if [ ! -e /etc/debian_version ] ; then
+        echo "WARNING: your system is not a Debian based distro" 1>&2
+    elif ! installed_dpkg binfmt-support ; then
+        echo "WARNING: package binfmt-support is needed" 1>&2
+    fi
+    qemu_check_access "$EXPORTDIR"
+}
+
+qemu_check_systemd() {
+    if ! systemctl -q is-enabled systemd-binfmt.service ; then
+        echo "WARNING: systemd-binfmt.service is missing or disabled" 1>&2
+    fi
+    qemu_check_access "$EXPORTDIR"
+}
+
+qemu_generate_register() {
+    echo ":qemu-$cpu:M::$magic:$mask:$qemu:$FLAGS"
+}
+
+qemu_register_interpreter() {
+    echo "Setting $qemu as binfmt interpreter for $cpu"
+    qemu_generate_register > /proc/sys/fs/binfmt_misc/register
+}
+
+qemu_generate_systemd() {
+    echo "Setting $qemu as binfmt interpreter for $cpu for systemd-binfmt.service"
+    qemu_generate_register > "$EXPORTDIR/qemu-$cpu.conf"
+}
+
+qemu_generate_debian() {
+    cat > "$EXPORTDIR/qemu-$cpu" <<EOF
+package qemu-$cpu
+interpreter $qemu
+magic $magic
+mask $mask
+EOF
+    if [ "$FLAGS" = "OC" ] ; then
+        echo "credentials yes" >> "$EXPORTDIR/qemu-$cpu"
+    fi
+}
+
+qemu_set_binfmts() {
+    # probe cpu type
+    host_family=$(qemu_get_family)
+
+    # register the interpreter for each cpu except for the native one
+
+    for cpu in ${qemu_target_list} ; do
+        magic=$(eval echo \$${cpu}_magic)
+        mask=$(eval echo \$${cpu}_mask)
+        family=$(eval echo \$${cpu}_family)
+
+        if [ "$magic" = "" ] || [ "$mask" = "" ] || [ "$family" = "" ] ; then
+            echo "INTERNAL ERROR: unknown cpu $cpu" 1>&2
+            continue
+        fi
+
+        qemu="$QEMU_PATH/qemu-$cpu"
+        if [ "$cpu" = "i486" ] ; then
+            qemu="$QEMU_PATH/qemu-i386"
+        fi
+
+        if [ "$host_family" != "$family" ] ; then
+            $BINFMT_SET
+        fi
+    done
+}
+
+CHECK=qemu_check_bintfmt_misc
+BINFMT_SET=qemu_register_interpreter
+
+SYSTEMDDIR="/etc/binfmt.d"
+DEBIANDIR="/usr/share/binfmts"
+
+QEMU_PATH=/usr/local/bin
+FLAGS=""
+
+options=$(getopt -o ds:Q:e:hc: -l debian,systemd:,qemu-path:,exportdir:,help,credential: -- "$@")
+eval set -- "$options"
+
+while true ; do
+    case "$1" in
+    -d|--debian)
+        CHECK=qemu_check_debian
+        BINFMT_SET=qemu_generate_debian
+        EXPORTDIR=${EXPORTDIR:-$DEBIANDIR}
+        ;;
+    -s|--systemd)
+        CHECK=qemu_check_systemd
+        BINFMT_SET=qemu_generate_systemd
+        EXPORTDIR=${EXPORTDIR:-$SYSTEMDDIR}
+        shift
+        # check given cpu is in the supported CPU list
+        for cpu in ${qemu_target_list} ; do
+            if [ "$cpu" == "$1" ] ; then
+                break
+            fi
+        done
+
+        if [ "$cpu" == "$1" ] ; then
+            qemu_target_list="$1"
+        else
+            echo "ERROR: unknown CPU \"$1\"" 1>&2
+            usage
+            exit 1
+        fi
+        ;;
+    -Q|--qemu-path)
+        shift
+        QEMU_PATH="$1"
+        ;;
+    -e|--exportdir)
+        shift
+        EXPORTDIR="$1"
+        ;;
+    -h|--help)
+        usage
+        exit 1
+        ;;
+    -c|--credential)
+        shift
+        if [ "$1" = "yes" ] ; then
+            FLAGS="OC"
+        else
+            FLAGS=""
+        fi
+        ;;
+    *)
+        break
+        ;;
+    esac
+    shift
+done
+
+$CHECK
+qemu_set_binfmts