buildroot/board/qemu/aarch64-ebbr/post-image.sh

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#!/bin/sh
set -eu
BOARD_DIR=$(dirname "$0")
# Create flash.bin TF-A FIP image from bl1.bin and fip.bin
dd if="${BINARIES_DIR}/bl1.bin" of="${BINARIES_DIR}/flash.bin" bs=1M
dd if="${BINARIES_DIR}/fip.bin" of="${BINARIES_DIR}/flash.bin" seek=64 bs=4096 conv=notrunc
# Override the default GRUB configuration file with our own.
cp -f "${BOARD_DIR}/grub.cfg" "${BINARIES_DIR}/efi-part/EFI/BOOT/grub.cfg"