From 9fa72e56bf2e860ff38be417fafd621c437cca86 Mon Sep 17 00:00:00 2001
From: Jeff Grafton <jgrafton@google.com>
Date: Mon, 15 Oct 2018 10:48:01 -0700
Subject: [PATCH] Fork multiarch/qemu-user-static registration scripts

These files were downloaded from
https://github.com/multiarch/qemu-user-static/tree/22b0013668d2aed4a2cfd21650e85c664b1f21c6.
---
 .../multiarch/qemu-user-static/LICENSE        |  21 +
 .../qemu-user-static/README.kubernetes        |   1 +
 .../register/qemu-binfmt-conf.sh              | 367 ++++++++++++++++++
 .../qemu-user-static/register/register.sh     |  31 ++
 4 files changed, 420 insertions(+)
 create mode 100644 third_party/multiarch/qemu-user-static/LICENSE
 create mode 100644 third_party/multiarch/qemu-user-static/README.kubernetes
 create mode 100755 third_party/multiarch/qemu-user-static/register/qemu-binfmt-conf.sh
 create mode 100755 third_party/multiarch/qemu-user-static/register/register.sh

diff --git a/third_party/multiarch/qemu-user-static/LICENSE b/third_party/multiarch/qemu-user-static/LICENSE
new file mode 100644
index 00000000000..e9658e820b8
--- /dev/null
+++ b/third_party/multiarch/qemu-user-static/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2015-2016 Manfred Touron
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/third_party/multiarch/qemu-user-static/README.kubernetes b/third_party/multiarch/qemu-user-static/README.kubernetes
new file mode 100644
index 00000000000..4e046fe6a0b
--- /dev/null
+++ b/third_party/multiarch/qemu-user-static/README.kubernetes
@@ -0,0 +1 @@
+Files copied from https://github.com/multiarch/qemu-user-static at commit 22b0013668d2aed4a2cfd21650e85c664b1f21c6.
diff --git a/third_party/multiarch/qemu-user-static/register/qemu-binfmt-conf.sh b/third_party/multiarch/qemu-user-static/register/qemu-binfmt-conf.sh
new file mode 100755
index 00000000000..f21f1466029
--- /dev/null
+++ b/third_party/multiarch/qemu-user-static/register/qemu-binfmt-conf.sh
@@ -0,0 +1,367 @@
+#!/bin/sh
+# enable automatic i386/ARM/M68K/MIPS/SPARC/PPC/s390/HPPA/Xtensa/microblaze
+# program execution by the kernel
+#
+# downloaded from https://raw.githubusercontent.com/qemu/qemu/master/scripts/qemu-binfmt-conf.sh
+
+qemu_target_list="i386 i486 alpha arm armeb sparc32plus ppc ppc64 ppc64le m68k \
+mips mipsel mipsn32 mipsn32el mips64 mips64el \
+sh4 sh4eb s390x aarch64 aarch64_be hppa riscv32 riscv64 xtensa xtensaeb microblaze microblazeel"
+
+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=armeb
+
+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\x00\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
+
+aarch64_be_magic='\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7'
+aarch64_be_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
+aarch64_be_family=armeb
+
+hppa_magic='\x7f\x45\x4c\x46\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x0f'
+hppa_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
+hppa_family=hppa
+
+riscv32_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xf3\x00'
+riscv32_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
+riscv32_family=riscv
+
+riscv64_magic='\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xf3\x00'
+riscv64_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
+riscv64_family=riscv
+
+xtensa_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x5e\x00'
+xtensa_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
+xtensa_family=xtensa
+
+xtensaeb_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x5e'
+xtensaeb_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
+xtensaeb_family=xtensaeb
+
+microblaze_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xba\xab'
+microblaze_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
+microblaze_family=microblaze
+
+microblazeel_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xab\xba'
+microblazeel_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
+microblazeel_family=microblazeel
+
+qemu_get_family() {
+    cpu=${HOST_ARCH:-$(uname -m)}
+    case "$cpu" in
+    amd64|i386|i486|i586|i686|i86pc|BePC|x86_64)
+        echo "i386"
+        ;;
+    mips*)
+        echo "mips"
+        ;;
+    "Power Macintosh"|ppc64|powerpc|ppc)
+        echo "ppc"
+        ;;
+    ppc64el|ppc64le)
+        echo "ppcle"
+        ;;
+    arm|armel|armhf|arm64|armv[4-9]*l|aarch64)
+        echo "arm"
+        ;;
+    armeb|armv[4-9]*b|aarch64_be)
+        echo "armeb"
+        ;;
+    sparc*)
+        echo "sparc"
+        ;;
+    riscv*)
+        echo "riscv"
+        ;;
+    *)
+        echo "$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. If CPU is "ALL", generate a
+                     file for all known cpus
+       --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-$cpu-static"
+        if [ "$cpu" = "i486" ] ; then
+            qemu="$QEMU_PATH/qemu-i386-static"
+        fi
+
+        if [ "$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
+        if [ "$1" != "ALL" ] ; then
+            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
+        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
diff --git a/third_party/multiarch/qemu-user-static/register/register.sh b/third_party/multiarch/qemu-user-static/register/register.sh
new file mode 100755
index 00000000000..8e3dab5da5d
--- /dev/null
+++ b/third_party/multiarch/qemu-user-static/register/register.sh
@@ -0,0 +1,31 @@
+#!/bin/sh
+
+QEMU_BIN_DIR=${QEMU_BIN_DIR:-/usr/bin}
+
+
+if [ ! -d /proc/sys/fs/binfmt_misc ]; then
+    echo "No binfmt support in the kernel."
+    echo "  Try: '/sbin/modprobe binfmt_misc' from the host"
+    exit 1
+fi
+
+
+if [ ! -f /proc/sys/fs/binfmt_misc/register ]; then
+    mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc
+fi
+
+entries="aarch64 aarch64_be alpha arm armeb hppa m68k microblaze microblazeel mips mips64 mips64el mipsel mipsn32 mipsn32el ppc ppc64 ppc64le riscv32 riscv64 s390x sh4 sh4eb sparc sparc32plus sparc64 xtensa xtensaeb"
+
+if [ "${1}" = "--reset" ]; then
+    shift
+    (
+    cd /proc/sys/fs/binfmt_misc
+    for file in $entries; do
+        if [ -f qemu-${file} ]; then
+            echo -1 > qemu-${file}
+        fi
+    done
+    )
+fi
+
+exec /qemu-binfmt-conf.sh --qemu-path="${QEMU_BIN_DIR}" $@