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#!/bin/sh
help()
{
echo " The scope of this script is to setup an environment for 32b legacy applications."
echo " This is a replacement for MULTILIB mechanism which is not available yet for aarch64."
echo " qemu-arm(user mode) is used to set access to 32b libraries instead of the host's libs"
echo " "
echo " Prerequisites:"
echo " - user must build a 32b amrv7 rootfs (e.q. build a image for qemuarm)"
echo " - user must copy 32b armv7 rootfs under 64b rootfs (e.q. /mnt/rootfs32)"
echo " - user must copy 32b application under 32b rootfs (e.q. /mnt/rootfs32/myapp)"
echo " - user must configure properly the smart package manager in order to access"
echo " <qemu-arm> and <kernel-module-binfmt-misc> packages otherwise it is"
echo " expected that those packages are already installed"
echo ""
echo " Run setup script to prepare the environment for 32b applications( -l param is optional )"
echo " > set_32b_env_qemu -r /mnt/rootfs32 -l /usr/local/extlib:/usr/local/mylib"
echo ""
echo " After that user should be able to run any 32b application as usual!"
echo " >./myapp"
break
}
usage()
{
echo "Setup environment to run 32b dynamically linked applications using qemu."
echo "Prerequisites:"
echo " It is expected that qemu and kernel-module-binfmt-misc packages are installed"
echo " It is expected that 32bit rootfs is already installed!"
echo ""
echo "set_32b_env_qemu -r <path to 32b rootfs> -l <ext_libs1:ext_libs2:...>"
echo " -r : [mandatory] path to 32b rootfs"
echo " -l : [optional] list of paths for nonstandard lib folders, paths must be relative to 32b rootfs"
echo " -h : [optional] display help"
echo ""
echo "Example: set_32b_env_qemu -r ./rootfs32b -l /usr/local/mylib:/usr/local/mylib2"
break
}
if [[ $# -eq 0 ]] ; then
echo "[ERR]: Missing script parameters!"
echo ""
usage
fi
while getopts "hr:l:" OPTION;
do
case $OPTION in
r)
ROOTFS32b_PATH="$OPTARG"
;;
l)
LIBS_PATH="$OPTARG"
;;
h)
usage
;;
?)
help
;;
esac
done
ABS_PATH=`cd "${ROOTFS32b_PATH}"; pwd`
ROOTFS32b_PATH=${ABS_PATH}
if [[ ! -d ${ROOTFS32b_PATH} ]] ; then
usage
fi
echo "Please wait..."
echo ""
QEMU_EXISTS=`which qemu-arm`
if [[ "${QEMU_EXISTS}" == "" ]] ; then
echo "Please make sure smart package manager is configured !"
echo "Otherwise make sure <qemu> and <kernel-module-binfmt-misc> are installed!"
smart --quiet update
smart --quiet install qemu
smart --quiet install kernel-module-binfmt-misc
fi
echo "."
mount -t binfmt_misc none /proc/sys/fs/binfmt_misc
if [[ "$?" != "0" ]] ; then
echo "Failed to install binfmt_misc or the setup was already prepared for 32b"
echo ""
echo "Please, make sure the module is available into system"
echo "How to install the binfmt_misc package:"
echo " smart install binfmt_misc"
break
fi
BINFMT_INSTALLED=`cat /proc/sys/fs/binfmt_misc/status`
if [[ "${BINFMT_INSTALLED}" != "enabled" ]] ; then
echo "binfmt_misc not enabled!!"
break
fi
echo ".."
# configure qemu to run 32b armv7 applications
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/bin/qemu-arm:" > /proc/sys/fs/binfmt_misc/register
export QEMU_LD_PREFIX=${ROOTFS32b_PATH}
export QEMU_SET_ENV="LD_LIBRARY_PATH=${LIBS_PATH}"
echo "Done!"
echo "Environment was set to run 32b applications!"
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