ELFbac ARM port
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linux
scripts
tools/elfbac-ld
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HACKING.md
README.md

README.md

ELFbac ARM

This repository is (currently) split into three components. The modified kernel lives in linux/, and is a git subtree tracking the main linux repository on github.

Companion tools for working with ELFbac policies live in tools/. The main (only) tool now is elfbac-ld, which is a wrapper around the GNU linker to lay out sections properly and to link in an ELFbac policy as described by a JSON file.

There are sample programs in tools/examples/ to see how this works. You can run it in the VM or on the host with qemu-arm-static.

Scripts to create a vexpress-a9 qemu vm have been placed in scripts/, along with a kernel config for that machine. Requires a debian-based (Ubuntu probably) machine with the arm-linux-gnueabihf toolchain and qemu installed.

gdbinit in scripts is symlinked to .gdbinit there, so running gdb-multiarch from the scripts directory will start gdb and connect to a waiting vm (started with -S -s). Will need to add that path to your load path in ~/.gdbinit for this to work.

Transcript from new Ubuntu install

sudo apt-get install gcc-arm-linux-gnueabihf gdb-multiarch qemu-system-arm debootstrap python-virtualenv
cd linux
export ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-
cp ../scripts/config_vexpress_a9 .config
make oldconfig
make
cd ../scripts
./make-vm.sh
cd ../tools
mkdir venv
virtualenv --no-site-packages venv
source venv/bin/activate
pip install -r requirements.txt
cd ../scripts
./run-vm.sh -S -s
gdb-multiarch