From 75ac7671300d0ef911464b3b5b234e7b5f15e4a8 Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <greg@kroah.com>
Date: Wed, 28 Aug 2013 14:24:02 -0700
Subject: [PATCH] feat(update_bootloaders.sh) add UEFI boot support

This creates the EFI/BOOT/ directory in the boot partition and copies a
version of the kernel into there so that UEFI bioses can boot directly
into the kernel, no bootloader needed.
---
 update_bootloaders.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/update_bootloaders.sh b/update_bootloaders.sh
index 2144b180e7..24b2d6e9d9 100755
--- a/update_bootloaders.sh
+++ b/update_bootloaders.sh
@@ -114,6 +114,11 @@ if [[ "${FLAGS_arch}" = "x86" || "${FLAGS_arch}" = "amd64" ]]; then
   sudo cp -f "${FLAGS_vmlinuz}" "${ESP_FS_DIR}"/syslinux/vmlinuz.A
   sudo cp -f "${FLAGS_vmlinuz}" "${ESP_FS_DIR}"/syslinux/vmlinuz.B
 
+  # create the EFI directory tree as a fall-back for UEFI builds and put a copy
+  # of the kernel in there.
+  sudo mkdir -p "${ESP_FS_DIR}"/EFI/boot
+  sudo cp -f "${FLAGS_vmlinuz}" "${ESP_FS_DIR}"/EFI/boot/bootx64.efi
+
   # Extract kernel flags
   kernel_cfg="cros_debug"
   old_root="%U+1"