scripts/qemu-binfmt-conf.sh

   1 #!/bin/sh
   2 # enable automatic i386/ARM/M68K/MIPS/SPARC/PPC/s390/HPPA/Xtensa
   3 # program execution by the kernel
   4
   5 qemu_target_list="i386 i486 alpha arm armeb sparc32plus ppc ppc64 ppc64le m68k \
   6 mips mipsel mipsn32 mipsn32el mips64 mips64el \
   7 sh4 sh4eb s390x aarch64 aarch64_be hppa riscv32 riscv64 xtensa xtensaeb"
   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\xff\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\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
  15 i486_family=i386
  16
  17 alpha_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x26\x90'
  18 alpha_mask='\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
  19 alpha_family=alpha
  20
  21 arm_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00'
  22 arm_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
  23 arm_family=arm
  24
  25 armeb_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28'
  26 armeb_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  27 armeb_family=armeb
  28
  29 sparc_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02'
  30 sparc_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  31 sparc_family=sparc
  32
  33 sparc32plus_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x12'
  34 sparc32plus_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  35 sparc32plus_family=sparc
  36
  37 ppc_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x14'
  38 ppc_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  39 ppc_family=ppc
  40
  41 ppc64_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15'
  42 ppc64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  43 ppc64_family=ppc
  44
  45 ppc64le_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15\x00'
  46 ppc64le_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\x00'
  47 ppc64le_family=ppcle
  48
  49 m68k_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x04'
  50 m68k_mask='\xff\xff\xff\xff\xff\xff\xfe\xfe\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  51 m68k_family=m68k
  52
  53 # FIXME: We could use the other endianness on a MIPS host.
  54
  55 mips_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
  56 mips_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  57 mips_family=mips
  58
  59 mipsel_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
  60 mipsel_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
  61 mipsel_family=mips
  62
  63 mipsn32_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
  64 mipsn32_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  65 mipsn32_family=mips
  66
  67 mipsn32el_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
  68 mipsn32el_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
  69 mipsn32el_family=mips
  70
  71 mips64_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'
  72 mips64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  73 mips64_family=mips
  74
  75 mips64el_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'
  76 mips64el_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
  77 mips64el_family=mips
  78
  79 sh4_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a\x00'
  80 sh4_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
  81 sh4_family=sh4
  82
  83 sh4eb_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x2a'
  84 sh4eb_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  85 sh4eb_family=sh4
  86
  87 s390x_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x16'
  88 s390x_mask='\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  89 s390x_family=s390x
  90
  91 aarch64_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00'
  92 aarch64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
  93 aarch64_family=arm
  94
  95 aarch64_be_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7'
  96 aarch64_be_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
  97 aarch64_be_family=armeb
  98
  99 hppa_magic='\x7f\x45\x4c\x46\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x0f'
 100 hppa_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
 101 hppa_family=hppa
 102
 103 riscv32_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xf3\x00'
 104 riscv32_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
 105 riscv32_family=riscv
 106
 107 riscv64_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xf3\x00'
 108 riscv64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
 109 riscv64_family=riscv
 110
 111 xtensa_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x5e\x00'
 112 xtensa_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
 113 xtensa_family=xtensa
 114
 115 xtensaeb_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x5e'
 116 xtensaeb_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
 117 xtensaeb_family=xtensaeb
 118
 119 qemu_get_family() {
 120     cpu=${HOST_ARCH:-$(uname -m)}
 121     case "$cpu" in
 122     amd64|i386|i486|i586|i686|i86pc|BePC|x86_64)
 123         echo "i386"
 124         ;;
 125     mips*)
 126         echo "mips"
 127         ;;
 128     "Power Macintosh"|ppc64|powerpc|ppc)
 129         echo "ppc"
 130         ;;
 131     ppc64el|ppc64le)
 132         echo "ppcle"
 133         ;;
 134     arm|armel|armhf|arm64|armv[4-9]*l|aarch64)
 135         echo "arm"
 136         ;;
 137     armeb|armv[4-9]*b|aarch64_be)
 138         echo "armeb"
 139         ;;
 140     sparc*)
 141         echo "sparc"
 142         ;;
 143     riscv*)
 144         echo "riscv"
 145         ;;
 146     *)
 147         echo "$cpu"
 148         ;;
 149     esac
 150 }
 151
 152 usage() {
 153     cat <<EOF
 154 Usage: qemu-binfmt-conf.sh [--qemu-path PATH][--debian][--systemd CPU]
 155                            [--help][--credential yes|no][--exportdir PATH]
 156
 157        Configure binfmt_misc to use qemu interpreter
 158
 159        --help:       display this usage
 160        --qemu-path:  set path to qemu interpreter ($QEMU_PATH)
 161        --debian:     don't write into /proc,
 162                      instead generate update-binfmts templates
 163        --systemd:    don't write into /proc,
 164                      instead generate file for systemd-binfmt.service
 165                      for the given CPU. If CPU is "ALL", generate a
 166                      file for all known cpus
 167        --exportdir:  define where to write configuration files
 168                      (default: $SYSTEMDDIR or $DEBIANDIR)
 169        --credential: if yes, credential and security tokens are
 170                      calculated according to the binary to interpret
 171
 172     To import templates with update-binfmts, use :
 173
 174         sudo update-binfmts --importdir ${EXPORTDIR:-$DEBIANDIR} --import qemu-CPU
 175
 176     To remove interpreter, use :
 177
 178         sudo update-binfmts --package qemu-CPU --remove qemu-CPU $QEMU_PATH
 179
 180     With systemd, binfmt files are loaded by systemd-binfmt.service
 181
 182     The environment variable HOST_ARCH allows to override 'uname' to generate
 183     configuration files for a different architecture than the current one.
 184
 185     where CPU is one of:
 186
 187         $qemu_target_list
 188
 189 EOF
 190 }
 191
 192 qemu_check_access() {
 193     if [ ! -w "$1" ] ; then
 194         echo "ERROR: cannot write to $1" 1>&2
 195         exit 1
 196     fi
 197 }
 198
 199 qemu_check_bintfmt_misc() {
 200     # load the binfmt_misc module
 201     if [ ! -d /proc/sys/fs/binfmt_misc ]; then
 202       if ! /sbin/modprobe binfmt_misc ; then
 203           exit 1
 204       fi
 205     fi
 206     if [ ! -f /proc/sys/fs/binfmt_misc/register ]; then
 207       if ! mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc ; then
 208           exit 1
 209       fi
 210     fi
 211
 212     qemu_check_access /proc/sys/fs/binfmt_misc/register
 213 }
 214
 215 installed_dpkg() {
 216     dpkg --status "$1" > /dev/null 2>&1
 217 }
 218
 219 qemu_check_debian() {
 220     if [ ! -e /etc/debian_version ] ; then
 221         echo "WARNING: your system is not a Debian based distro" 1>&2
 222     elif ! installed_dpkg binfmt-support ; then
 223         echo "WARNING: package binfmt-support is needed" 1>&2
 224     fi
 225     qemu_check_access "$EXPORTDIR"
 226 }
 227
 228 qemu_check_systemd() {
 229     if ! systemctl -q is-enabled systemd-binfmt.service ; then
 230         echo "WARNING: systemd-binfmt.service is missing or disabled" 1>&2
 231     fi
 232     qemu_check_access "$EXPORTDIR"
 233 }
 234
 235 qemu_generate_register() {
 236     echo ":qemu-$cpu:M::$magic:$mask:$qemu:$FLAGS"
 237 }
 238
 239 qemu_register_interpreter() {
 240     echo "Setting $qemu as binfmt interpreter for $cpu"
 241     qemu_generate_register > /proc/sys/fs/binfmt_misc/register
 242 }
 243
 244 qemu_generate_systemd() {
 245     echo "Setting $qemu as binfmt interpreter for $cpu for systemd-binfmt.service"
 246     qemu_generate_register > "$EXPORTDIR/qemu-$cpu.conf"
 247 }
 248
 249 qemu_generate_debian() {
 250     cat > "$EXPORTDIR/qemu-$cpu" <<EOF
 251 package qemu-$cpu
 252 interpreter $qemu
 253 magic $magic
 254 mask $mask
 255 EOF
 256     if [ "$FLAGS" = "OC" ] ; then
 257         echo "credentials yes" >> "$EXPORTDIR/qemu-$cpu"
 258     fi
 259 }
 260
 261 qemu_set_binfmts() {
 262     # probe cpu type
 263     host_family=$(qemu_get_family)
 264
 265     # register the interpreter for each cpu except for the native one
 266
 267     for cpu in ${qemu_target_list} ; do
 268         magic=$(eval echo \$${cpu}_magic)
 269         mask=$(eval echo \$${cpu}_mask)
 270         family=$(eval echo \$${cpu}_family)
 271
 272         if [ "$magic" = "" ] || [ "$mask" = "" ] || [ "$family" = "" ] ; then
 273             echo "INTERNAL ERROR: unknown cpu $cpu" 1>&2
 274             continue
 275         fi
 276
 277         qemu="$QEMU_PATH/qemu-$cpu"
 278         if [ "$cpu" = "i486" ] ; then
 279             qemu="$QEMU_PATH/qemu-i386"
 280         fi
 281
 282         if [ "$host_family" != "$family" ] ; then
 283             $BINFMT_SET
 284         fi
 285     done
 286 }
 287
 288 CHECK=qemu_check_bintfmt_misc
 289 BINFMT_SET=qemu_register_interpreter
 290
 291 SYSTEMDDIR="/etc/binfmt.d"
 292 DEBIANDIR="/usr/share/binfmts"
 293
 294 QEMU_PATH=/usr/local/bin
 295 FLAGS=""
 296
 297 options=$(getopt -o ds:Q:e:hc: -l debian,systemd:,qemu-path:,exportdir:,help,credential: -- "$@")
 298 eval set -- "$options"
 299
 300 while true ; do
 301     case "$1" in
 302     -d|--debian)
 303         CHECK=qemu_check_debian
 304         BINFMT_SET=qemu_generate_debian
 305         EXPORTDIR=${EXPORTDIR:-$DEBIANDIR}
 306         ;;
 307     -s|--systemd)
 308         CHECK=qemu_check_systemd
 309         BINFMT_SET=qemu_generate_systemd
 310         EXPORTDIR=${EXPORTDIR:-$SYSTEMDDIR}
 311         shift
 312         # check given cpu is in the supported CPU list
 313         if [ "$1" != "ALL" ] ; then
 314             for cpu in ${qemu_target_list} ; do
 315                 if [ "$cpu" = "$1" ] ; then
 316                     break
 317                 fi
 318             done
 319
 320             if [ "$cpu" = "$1" ] ; then
 321                 qemu_target_list="$1"
 322             else
 323                 echo "ERROR: unknown CPU \"$1\"" 1>&2
 324                 usage
 325                 exit 1
 326             fi
 327         fi
 328         ;;
 329     -Q|--qemu-path)
 330         shift
 331         QEMU_PATH="$1"
 332         ;;
 333     -e|--exportdir)
 334         shift
 335         EXPORTDIR="$1"
 336         ;;
 337     -h|--help)
 338         usage
 339         exit 1
 340         ;;
 341     -c|--credential)
 342         shift
 343         if [ "$1" = "yes" ] ; then
 344             FLAGS="OC"
 345         else
 346             FLAGS=""
 347         fi
 348         ;;
 349     *)
 350         break
 351         ;;
 352     esac
 353     shift
 354 done
 355
 356 $CHECK
 357 qemu_set_binfmts