1 files changed, 113 insertions, 0 deletions

diff --git a/recipes-support/32b-env/files/set_32b_env_qemu.sh b/recipes-support/32b-env/files/set_32b_env_qemu.sh
new file mode 100755
index 0000000..e8c174d
--- /dev/null
+++ b/recipes-support/32b-env/files/set_32b_env_qemu.sh
@@ -0,0 +1,113 @@
+#!/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!"