scripts/qemu-binfmt-conf.sh

   1 #!/bin/sh
   2 # Enable automatic program execution by the kernel.
   3
   4 qemu_target_list="i386 i486 alpha arm armeb sparc sparc32plus sparc64 \
   5 ppc ppc64 ppc64le m68k mips mipsel mipsn32 mipsn32el mips64 mips64el \
   6 sh4 sh4eb s390x aarch64 aarch64_be hppa riscv32 riscv64 xtensa xtensaeb \
   7 microblaze microblazeel or1k x86_64"
   8
   9 i386_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00'
  10 i386_mask='\xff\xff\xff\xff\xff\xfe\xfe\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
  11 i386_family=i386
  12
  13 i486_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x06\x00'
  14 i486_mask='\xff\xff\xff\xff\xff\xfe\xfe\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
  15 i486_family=i386
  16
  17 x86_64_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x3e\x00'
  18 x86_64_mask='\xff\xff\xff\xff\xff\xfe\xfe\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
  19 x86_64_family=i386
  20
  21 alpha_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x26\x90'
  22 alpha_mask='\xff\xff\xff\xff\xff\xfe\xfe\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
  23 alpha_family=alpha
  24
  25 arm_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00'
  26 arm_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
  27 arm_family=arm
  28
  29 armeb_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28'
  30 armeb_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  31 armeb_family=armeb
  32
  33 sparc_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02'
  34 sparc_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  35 sparc_family=sparc
  36
  37 sparc32plus_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x12'
  38 sparc32plus_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  39 sparc32plus_family=sparc
  40
  41 sparc64_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2b'
  42 sparc64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  43 sparc64_family=sparc
  44
  45 ppc_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x14'
  46 ppc_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  47 ppc_family=ppc
  48
  49 ppc64_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15'
  50 ppc64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  51 ppc64_family=ppc
  52
  53 ppc64le_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15\x00'
  54 ppc64le_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\x00'
  55 ppc64le_family=ppcle
  56
  57 m68k_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x04'
  58 m68k_mask='\xff\xff\xff\xff\xff\xff\xfe\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  59 m68k_family=m68k
  60
  61 # FIXME: We could use the other endianness on a MIPS host.
  62
  63 mips_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
  64 mips_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  65 mips_family=mips
  66
  67 mipsel_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
  68 mipsel_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
  69 mipsel_family=mips
  70
  71 mipsn32_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
  72 mipsn32_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  73 mipsn32_family=mips
  74
  75 mipsn32el_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
  76 mipsn32el_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
  77 mipsn32el_family=mips
  78
  79 mips64_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
  80 mips64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  81 mips64_family=mips
  82
  83 mips64el_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
  84 mips64el_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
  85 mips64el_family=mips
  86
  87 sh4_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a\x00'
  88 sh4_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
  89 sh4_family=sh4
  90
  91 sh4eb_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a'
  92 sh4eb_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  93 sh4eb_family=sh4
  94
  95 s390x_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x16'
  96 s390x_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  97 s390x_family=s390x
  98
  99 aarch64_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00'
 100 aarch64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
 101 aarch64_family=arm
 102
 103 aarch64_be_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7'
 104 aarch64_be_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
 105 aarch64_be_family=armeb
 106
 107 hppa_magic='\x7f\x45\x4c\x46\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x0f'
 108 hppa_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
 109 hppa_family=hppa
 110
 111 riscv32_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xf3\x00'
 112 riscv32_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
 113 riscv32_family=riscv
 114
 115 riscv64_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xf3\x00'
 116 riscv64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
 117 riscv64_family=riscv
 118
 119 xtensa_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x5e\x00'
 120 xtensa_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
 121 xtensa_family=xtensa
 122
 123 xtensaeb_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x5e'
 124 xtensaeb_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
 125 xtensaeb_family=xtensaeb
 126
 127 microblaze_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xba\xab'
 128 microblaze_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
 129 microblaze_family=microblaze
 130
 131 microblazeel_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xab\xba'
 132 microblazeel_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
 133 microblazeel_family=microblazeel
 134
 135 or1k_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x5c'
 136 or1k_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
 137 or1k_family=or1k
 138
 139 qemu_get_family() {
 140     cpu=${HOST_ARCH:-$(uname -m)}
 141     case "$cpu" in
 142     amd64|i386|i486|i586|i686|i86pc|BePC|x86_64)
 143         echo "i386"
 144         ;;
 145     mips*)
 146         echo "mips"
 147         ;;
 148     "Power Macintosh"|ppc64|powerpc|ppc)
 149         echo "ppc"
 150         ;;
 151     ppc64el|ppc64le)
 152         echo "ppcle"
 153         ;;
 154     arm|armel|armhf|arm64|armv[4-9]*l|aarch64)
 155         echo "arm"
 156         ;;
 157     armeb|armv[4-9]*b|aarch64_be)
 158         echo "armeb"
 159         ;;
 160     sparc*)
 161         echo "sparc"
 162         ;;
 163     riscv*)
 164         echo "riscv"
 165         ;;
 166     *)
 167         echo "$cpu"
 168         ;;
 169     esac
 170 }
 171
 172 usage() {
 173     cat <<EOF
 174 Usage: qemu-binfmt-conf.sh [--qemu-path PATH][--debian][--systemd CPU]
 175                            [--help][--credential yes|no][--exportdir PATH]
 176                            [--persistent yes|no][--qemu-suffix SUFFIX]
 177
 178        Configure binfmt_misc to use qemu interpreter
 179
 180        --help:        display this usage
 181        --qemu-path:   set path to qemu interpreter ($QEMU_PATH)
 182        --qemu-suffix: add a suffix to the default interpreter name
 183        --debian:      don't write into /proc,
 184                       instead generate update-binfmts templates
 185        --systemd:     don't write into /proc,
 186                       instead generate file for systemd-binfmt.service
 187                       for the given CPU. If CPU is "ALL", generate a
 188                       file for all known cpus
 189        --exportdir:   define where to write configuration files
 190                       (default: $SYSTEMDDIR or $DEBIANDIR)
 191        --credential:  if yes, credential and security tokens are
 192                       calculated according to the binary to interpret
 193        --persistent:  if yes, the interpreter is loaded when binfmt is
 194                       configured and remains in memory. All future uses
 195                       are cloned from the open file.
 196
 197     To import templates with update-binfmts, use :
 198
 199         sudo update-binfmts --importdir ${EXPORTDIR:-$DEBIANDIR} --import qemu-CPU
 200
 201     To remove interpreter, use :
 202
 203         sudo update-binfmts --package qemu-CPU --remove qemu-CPU $QEMU_PATH
 204
 205     With systemd, binfmt files are loaded by systemd-binfmt.service
 206
 207     The environment variable HOST_ARCH allows to override 'uname' to generate
 208     configuration files for a different architecture than the current one.
 209
 210     where CPU is one of:
 211
 212         $qemu_target_list
 213
 214 EOF
 215 }
 216
 217 qemu_check_access() {
 218     if [ ! -w "$1" ] ; then
 219         echo "ERROR: cannot write to $1" 1>&2
 220         exit 1
 221     fi
 222 }
 223
 224 qemu_check_bintfmt_misc() {
 225     # load the binfmt_misc module
 226     if [ ! -d /proc/sys/fs/binfmt_misc ]; then
 227       if ! /sbin/modprobe binfmt_misc ; then
 228           exit 1
 229       fi
 230     fi
 231     if [ ! -f /proc/sys/fs/binfmt_misc/register ]; then
 232       if ! mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc ; then
 233           exit 1
 234       fi
 235     fi
 236
 237     qemu_check_access /proc/sys/fs/binfmt_misc/register
 238 }
 239
 240 installed_dpkg() {
 241     dpkg --status "$1" > /dev/null 2>&1
 242 }
 243
 244 qemu_check_debian() {
 245     if [ ! -e /etc/debian_version ] ; then
 246         echo "WARNING: your system is not a Debian based distro" 1>&2
 247     elif ! installed_dpkg binfmt-support ; then
 248         echo "WARNING: package binfmt-support is needed" 1>&2
 249     fi
 250     qemu_check_access "$EXPORTDIR"
 251 }
 252
 253 qemu_check_systemd() {
 254     if ! systemctl -q is-enabled systemd-binfmt.service ; then
 255         echo "WARNING: systemd-binfmt.service is missing or disabled" 1>&2
 256     fi
 257     qemu_check_access "$EXPORTDIR"
 258 }
 259
 260 qemu_generate_register() {
 261     flags=""
 262     if [ "$CREDENTIAL" = "yes" ] ; then
 263         flags="OC"
 264     fi
 265     if [ "$PERSISTENT" = "yes" ] ; then
 266         flags="${flags}F"
 267     fi
 268
 269     echo ":qemu-$cpu:M::$magic:$mask:$qemu:$flags"
 270 }
 271
 272 qemu_register_interpreter() {
 273     echo "Setting $qemu as binfmt interpreter for $cpu"
 274     qemu_generate_register > /proc/sys/fs/binfmt_misc/register
 275 }
 276
 277 qemu_generate_systemd() {
 278     echo "Setting $qemu as binfmt interpreter for $cpu for systemd-binfmt.service"
 279     qemu_generate_register > "$EXPORTDIR/qemu-$cpu.conf"
 280 }
 281
 282 qemu_generate_debian() {
 283     cat > "$EXPORTDIR/qemu-$cpu" <<EOF
 284 package qemu-$cpu
 285 interpreter $qemu
 286 magic $magic
 287 mask $mask
 288 credential $CREDENTIAL
 289 EOF
 290 }
 291
 292 qemu_set_binfmts() {
 293     # probe cpu type
 294     host_family=$(qemu_get_family)
 295
 296     # register the interpreter for each cpu except for the native one
 297
 298     for cpu in ${qemu_target_list} ; do
 299         magic=$(eval echo \$${cpu}_magic)
 300         mask=$(eval echo \$${cpu}_mask)
 301         family=$(eval echo \$${cpu}_family)
 302
 303         if [ "$magic" = "" ] || [ "$mask" = "" ] || [ "$family" = "" ] ; then
 304             echo "INTERNAL ERROR: unknown cpu $cpu" 1>&2
 305             continue
 306         fi
 307
 308         qemu="$QEMU_PATH/qemu-$cpu"
 309         if [ "$cpu" = "i486" ] ; then
 310             qemu="$QEMU_PATH/qemu-i386"
 311         fi
 312
 313         qemu="$qemu$QEMU_SUFFIX"
 314         if [ "$host_family" != "$family" ] ; then
 315             $BINFMT_SET
 316         fi
 317     done
 318 }
 319
 320 CHECK=qemu_check_bintfmt_misc
 321 BINFMT_SET=qemu_register_interpreter
 322
 323 SYSTEMDDIR="/etc/binfmt.d"
 324 DEBIANDIR="/usr/share/binfmts"
 325
 326 QEMU_PATH=/usr/local/bin
 327 CREDENTIAL=no
 328 PERSISTENT=no
 329 QEMU_SUFFIX=""
 330
 331 options=$(getopt -o ds:Q:S:e:hc:p: -l debian,systemd:,qemu-path:,qemu-suffix:,exportdir:,help,credential:,persistent: -- "$@")
 332 eval set -- "$options"
 333
 334 while true ; do
 335     case "$1" in
 336     -d|--debian)
 337         CHECK=qemu_check_debian
 338         BINFMT_SET=qemu_generate_debian
 339         EXPORTDIR=${EXPORTDIR:-$DEBIANDIR}
 340         ;;
 341     -s|--systemd)
 342         CHECK=qemu_check_systemd
 343         BINFMT_SET=qemu_generate_systemd
 344         EXPORTDIR=${EXPORTDIR:-$SYSTEMDDIR}
 345         shift
 346         # check given cpu is in the supported CPU list
 347         if [ "$1" != "ALL" ] ; then
 348             for cpu in ${qemu_target_list} ; do
 349                 if [ "$cpu" = "$1" ] ; then
 350                     break
 351                 fi
 352             done
 353
 354             if [ "$cpu" = "$1" ] ; then
 355                 qemu_target_list="$1"
 356             else
 357                 echo "ERROR: unknown CPU \"$1\"" 1>&2
 358                 usage
 359                 exit 1
 360             fi
 361         fi
 362         ;;
 363     -Q|--qemu-path)
 364         shift
 365         QEMU_PATH="$1"
 366         ;;
 367     -F|--qemu-suffix)
 368         shift
 369         QEMU_SUFFIX="$1"
 370         ;;
 371     -e|--exportdir)
 372         shift
 373         EXPORTDIR="$1"
 374         ;;
 375     -h|--help)
 376         usage
 377         exit 1
 378         ;;
 379     -c|--credential)
 380         shift
 381         CREDENTIAL="$1"
 382         ;;
 383     -p|--persistent)
 384         shift
 385         PERSISTENT="$1"
 386         ;;
 387     *)
 388         break
 389         ;;
 390     esac
 391     shift
 392 done
 393
 394 $CHECK
 395 qemu_set_binfmts