[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH v3] linux-user: Fix qemu-binfmt-conf.h to store
From: |
Laurent Vivier |
Subject: |
Re: [Qemu-devel] [PATCH v3] linux-user: Fix qemu-binfmt-conf.h to store config across reboot |
Date: |
Wed, 25 May 2016 17:51:42 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.0 |
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 <address@hidden> 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 <address@hidden>
>>>> ---
>>>> 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
>>>>
>>
>
- Re: [Qemu-devel] [PATCH v3] linux-user: Fix qemu-binfmt-conf.h to store config across reboot,
Laurent Vivier <=