Generic Bootloader Library

This directory hosts the Generic Bootloader Library project. A Bazel workspace is setup for building the library as well as an EFI executable that can be loaded directly from the firmware.

Build

The GBL project are intended to be built from the Android UEFI Manifest checkout.

To build the EFI application:

./tools/bazel run //bootable/libbootloader:gbl_efi_dist --extra_toolchains=@gbl//toolchain:all

The above builds the EFI application for all of x86_64, x86_32, aarch64 and riscv64 platforms.

To run the set of unit tests:

./tools/bazel test @gbl//tests --extra_toolchains=@gbl//toolchain:all

Run the EFI application

Boot Android on Cuttlefish

If you have a main AOSP checkout and is setup to run Cuttlefish, you can run the EFI image directly with:

launch_cvd --android_efi_loader=<path to the EFI image> ...

The above uses the same setting as a normal launch_cvd run, except that insted of booting Android directly, the emulator first hands off to the EFI application, which will take over booting android.

Note: For x86 platform, use the EFI image built for x86_32.

Boot Fuchsia on Vim3

Booting Fuchsia on a Vim3 development board is supported. To run the application:

1. Complete all bootstrap steps to setup Vim3 as a Fuchsia device.
2. Reboot the device into fastboot mode.
3. Run fastboot command:

fastboot stage <path to the EFI binary> && fastboot oem run-staged-efi

Run on standalone QEMU

If you want to test the EFI image directly on QEMU with your custom configurations:

1. Install EDK, QEMU and u-boot prebuilts

   sudo apt-get install qemu-system ovmf u-boot-qemu
   

2. Depending on the target achitecture you want to run:

   For x86_64:

   mkdir -p /tmp/esp/EFI/BOOT && \
   cp <path to EFI image> /tmp/esp/EFI/BOOT/bootx64.efi && \
   qemu-system-x86_64 -nographic \
       -drive if=pflash,format=raw,readonly=on,file=/usr/share/OVMF/OVMF_CODE.fd \
       -drive format=raw,file=fat:rw:/tmp/esp
   

   For aarch64:

   mkdir -p /tmp/esp/EFI/BOOT && \
   cp <path to EFI image> /tmp/esp/EFI/BOOT/bootaa64.efi && \
   qemu-system-aarch64 -nographic -machine virt -m 1G -cpu cortex-a57 \
       -drive if=pflash,format=raw,readonly=on,file=/usr/share/AAVMF/AAVMF_CODE.fd \
       -drive format=raw,file=fat:rw:/tmp/esp
   

   For riscv64:

   mkdir -p /tmp/esp/EFI/BOOT && \
   cp <path to EFI image> /tmp/esp/EFI/BOOT/bootriscv64.efi && \
   qemu-system-riscv64 -nographic -machine virt -m 256M \
       -bios /usr/lib/u-boot/qemu-riscv64/u-boot.bin \
       -drive format=raw,file=fat:rw:/tmp/esp,id=blk0 \
       -device virtio-blk-device,drive=blk0