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+#!/bin/bash
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+# SPDX-License-Identifier: GPL-2.0+
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+#
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+# Script to build an EFI thing suitable for booting with QEMU, possibly running
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+# it also.
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+
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+# This just an example. It assumes that
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+
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+# - you build U-Boot in ${ubdir}/<name> where <name> is the U-Boot board config
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+# - /mnt/x is a directory used for mounting
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+# - you have access to the 'pure UEFI' builds for QEMU
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+#
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+# UEFI binaries for QEMU used for testing this script:
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+#
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+# OVMF-pure-efi.i386.fd at
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+# https://drive.google.com/file/d/1jWzOAZfQqMmS2_dAK2G518GhIgj9r2RY/view?usp=sharing
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+
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+# OVMF-pure-efi.x64.fd at
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+# https://drive.google.com/file/d/1c39YI9QtpByGQ4V0UNNQtGqttEzS-eFV/view?usp=sharing
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+
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+set -e
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+
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+usage() {
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+ echo "Usage: $0 [-a | -p] [other opts]" 1>&2
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+ echo 1>&2
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+ echo " -a - Package up the app" 1>&2
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+ echo " -o - Use old EFI app build (before 32/64 split)" 1>&2
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+ echo " -p - Package up the payload" 1>&2
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+ echo " -P - Create a partition table" 1>&2
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+ echo " -r - Run QEMU with the image" 1>&2
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+ echo " -s - Run QEMU with serial only (no display)" 1>&2
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+ echo " -w - Use word version (32-bit)" 1>&2
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+ exit 1
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+}
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+
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+# 32- or 64-bit EFI
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+bitness=64
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+
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+# app or payload ?
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+type=app
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+
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+# create a partition table and put the filesystem in that (otherwise put the
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+# filesystem in the raw device)
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+part=
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+
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+# run the image with QEMU
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+run=
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+
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+# run QEMU without a display (U-Boot must be set to stdout=serial)
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+serial=
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+
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+# before the 32/64 split of the app
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+old=
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+
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+# Set ubdir to the build directory where you build U-Boot out-of-tree
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+# We avoid in-tree build because it gets confusing trying different builds
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+ubdir=/tmp/b/
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+
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+while getopts "aopPrsw" opt; do
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+ case "${opt}" in
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+ a)
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+ type=app
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+ ;;
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+ p)
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+ type=payload
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+ ;;
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+ r)
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+ run=1
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+ ;;
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+ s)
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+ serial=1
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+ ;;
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+ w)
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+ bitness=32
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+ ;;
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+ o)
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+ old=1
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+ ;;
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+ P)
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+ part=1
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+ ;;
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+ *)
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+ usage
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+ ;;
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+ esac
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+done
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+
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+run_qemu() {
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+ extra=
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+ if [[ "${bitness}" = "64" ]]; then
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+ qemu=qemu-system-x86_64
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+ bios=OVMF-pure-efi.x64.fd
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+ else
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+ qemu=qemu-system-i386
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+ bios=OVMF-pure-efi.i386.fd
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+ fi
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+ if [[ -n "${serial}" ]]; then
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+ extra="-display none -serial mon:stdio"
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+ fi
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+ echo "Running ${qemu}"
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+ # Use 512MB since U-Boot EFI likes to have 256MB to play with
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+ "${qemu}" -bios "${bios}" \
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+ -m 512 \
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+ -drive id=disk,file="${IMG}",if=none,format=raw \
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+ -nic none -device ahci,id=ahci \
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+ -device ide-hd,drive=disk,bus=ahci.0 ${extra}
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+}
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+
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+setup_files() {
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+ echo "Packaging ${BUILD}"
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+ mkdir -p $TMP
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+ cat >$TMP/startup.nsh <<EOF
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+fs0:u-boot-${type}.efi
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+EOF
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+ sudo cp ${ubdir}/${BUILD}/u-boot-${type}.efi $TMP
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+
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+ # Can copy in other files here:
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+ #sudo cp ${ubdir}/$BUILD/image.bin $TMP/chromeos.rom
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+ #sudo cp /boot/vmlinuz-5.4.0-77-generic $TMP/vmlinuz
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+}
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+
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+# Copy files into the filesystem
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+copy_files() {
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+ sudo cp $TMP/* $MNT
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+}
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+
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+# Create a filesystem on a raw device and copy in the files
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+setup_raw() {
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+ mkfs.vfat "${IMG}" >/dev/null
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+ sudo mount -o loop "${IMG}" $MNT
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+ copy_files
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+ sudo umount $MNT
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+}
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+
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+# Create a partition table and put the filesystem in the first partition
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+# then copy in the files
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+setup_part() {
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+ # Create a gpt partition table with one partition
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+ parted "${IMG}" mklabel gpt 2>/dev/null
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+
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+ # This doesn't work correctly. It creates:
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+ # Number Start End Size File system Name Flags
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+ # 1 1049kB 24.1MB 23.1MB boot msftdata
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+ # Odd if the same is entered interactively it does set the FS type
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+ parted -s -a optimal -- "${IMG}" mkpart boot fat32 1MiB 23MiB
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+
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+ # Map this partition to a loop device
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+ kp="$(sudo kpartx -av ${IMG})"
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+ read boot_dev<<<$(grep -o 'loop.*p.' <<< "${kp}")
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+ test "${boot_dev}"
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+ dev="/dev/mapper/${boot_dev}"
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+
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+ mkfs.vfat "${dev}" >/dev/null
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+
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+ sudo mount -o loop "${dev}" $MNT
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+
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+ copy_files
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+
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+ # Sync here since this makes kpartx more likely to work the first time
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+ sync
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+ sudo umount $MNT
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+
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+ # For some reason this needs a sleep or it sometimes fails, if it was
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+ # run recently (in the last few seconds)
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+ if ! sudo kpartx -d "${IMG}" > /dev/null; then
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+ sleep .5
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+ sudo kpartx -d "${IMG}" > /dev/null || \
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+ echo "Failed to remove ${boot_dev}, use: sudo kpartx -d ${IMG}"
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+ fi
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+}
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+
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+TMP="/tmp/efi${bitness}${type}"
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+MNT=/mnt/x
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+BUILD="efi-x86_${type}${bitness}"
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+IMG=try.img
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+
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+if [[ -n "${old}" && "${bitness}" = "32" ]]; then
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+ BUILD="efi-x86_${type}"
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+fi
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+
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+setup_files
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+
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+qemu-img create "${IMG}" 24M >/dev/null
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+
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+if [[ -n "${part}" ]]; then
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+ setup_part
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+else
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+ setup_raw
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+fi
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+
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+if [[ -n "${run}" ]]; then
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+ run_qemu
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+fi
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