1#!/bin/bash 2# 3# Copyright (C) 2013 The Android Open Source Project 4# 5# Licensed under the Apache License, Version 2.0 (the "License"); 6# you may not use this file except in compliance with the License. 7# You may obtain a copy of the License at 8# 9# http://www.apache.org/licenses/LICENSE-2.0 10# 11# Unless required by applicable law or agreed to in writing, software 12# distributed under the License is distributed on an "AS IS" BASIS, 13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14# See the License for the specific language governing permissions and 15# limitations under the License. 16 17### Usage: generate_uapi_headers.sh [<options>] 18### 19### This script is used to get a copy of the uapi kernel headers 20### from an android kernel tree and copies them into an android source 21### tree without any processing. The script also creates all of the 22### generated headers and copies them into the android source tree. 23### 24### Options: 25### --skip-generation 26### Skip the step that generates all of the include files. 27### --download-kernel 28### Automatically create a temporary git repository and check out the 29### Android kernel source code. 30### --use-kernel-dir <DIR> 31### Do not check out the kernel source, use the kernel directory 32### pointed to by <DIR>. 33 34# Terminate the script if any command fails. 35set -eE 36 37TMPDIR="" 38ANDROID_DIR="" 39KERNEL_VERSION="android-3.10" 40KERNEL_DIR="" 41KERNEL_DOWNLOAD=0 42ARCH_LIST=("arm" "arm64" "mips" "x86") 43ANDROID_KERNEL_DIR="external/kernel-headers/original" 44SKIP_GENERATION=0 45 46function cleanup () { 47 if [[ "${TMPDIR}" =~ /tmp ]] && [[ -d "${TMPDIR}" ]]; then 48 echo "Removing temporary directory ${TMPDIR}" 49 rm -rf "${TMPDIR}" 50 TMPDIR="" 51 fi 52} 53 54function usage () { 55 grep '^###' $0 | sed -e 's/^###//' 56} 57 58function copy_hdrs () { 59 local src_dir=$1 60 local tgt_dir=$2 61 local dont_copy_dirs=$3 62 63 mkdir -p ${tgt_dir} 64 65 local search_dirs=() 66 67 # This only works if none of the filenames have spaces. 68 for file in $(ls -d ${src_dir}/* 2> /dev/null); do 69 if [[ -d "${file}" ]]; then 70 search_dirs+=("${file}") 71 elif [[ -f "${file}" ]] && [[ "${file}" =~ .h$ ]]; then 72 cp ${file} ${tgt_dir} 73 fi 74 done 75 76 if [[ "${dont_copy_dirs}" == "" ]]; then 77 for dir in "${search_dirs[@]}"; do 78 copy_hdrs "${dir}" ${tgt_dir}/$(basename ${dir}) 79 done 80 fi 81} 82 83function copy_if_exists () { 84 local check_dir=$1 85 local src_dir=$2 86 local tgt_dir=$3 87 88 mkdir -p ${tgt_dir} 89 90 # This only works if none of the filenames have spaces. 91 for file in $(ls -d ${src_dir}/* 2> /dev/null); do 92 if [[ -f "${file}" ]] && [[ "${file}" =~ .h$ ]]; then 93 # Check that this file exists in check_dir. 94 header=$(basename ${file}) 95 if [[ -f "${check_dir}/${header}" ]]; then 96 cp ${file} ${tgt_dir} 97 fi 98 fi 99 done 100} 101 102function check_hdrs () { 103 local src_dir=$1 104 local tgt_dir=$2 105 local kernel_dir=$3 106 107 local search_dirs=() 108 109 # This only works if none of the filenames have spaces. 110 for file in $(ls -d ${src_dir}/* 2> /dev/null); do 111 if [[ -d "${file}" ]]; then 112 search_dirs+=("${file}") 113 elif [[ -f "${file}" ]] && [[ "${file}" =~ .h$ ]]; then 114 tgt_file=${tgt_dir}/$(basename ${file}) 115 if [[ -e ${tgt_file} ]] && ! diff "${file}" "${tgt_file}" > /dev/null; then 116 if [[ ${file} =~ ${kernel_dir}/*(.+) ]]; then 117 echo "New version of ${BASH_REMATCH[1]} found in kernel headers." 118 else 119 echo "New version of ${file} found in kernel headers." 120 fi 121 echo "This file needs to be updated manually." 122 fi 123 fi 124 done 125 126 for dir in "${search_dirs[@]}"; do 127 check_hdrs "${dir}" ${tgt_dir}/$(basename ${dir}) "${kernel_dir}" 128 done 129} 130 131trap cleanup EXIT 132# This automatically triggers a call to cleanup. 133trap "exit 1" HUP INT TERM TSTP 134 135while [ $# -gt 0 ]; do 136 case "$1" in 137 "--skip-generation") 138 SKIP_GENERATION=1 139 ;; 140 "--download-kernel") 141 KERNEL_DOWNLOAD=1 142 ;; 143 "--use-kernel-dir") 144 if [[ $# -lt 2 ]]; then 145 echo "--use-kernel-dir requires an argument." 146 exit 1 147 fi 148 shift 149 KERNEL_DIR="$1" 150 KERNEL_DOWNLOAD=0 151 ;; 152 "-h" | "--help") 153 usage 154 exit 1 155 ;; 156 "-"*) 157 echo "Error: Unrecognized option $1" 158 usage 159 exit 1 160 ;; 161 *) 162 echo "Error: Extra arguments on the command-line." 163 usage 164 exit 1 165 ;; 166 esac 167 shift 168done 169 170ANDROID_KERNEL_DIR="${ANDROID_BUILD_TOP}/${ANDROID_KERNEL_DIR}" 171if [[ "${ANDROID_BUILD_TOP}" == "" ]]; then 172 echo "ANDROID_BUILD_TOP is not set, did you run lunch?" 173 exit 1 174elif [[ ! -d "${ANDROID_KERNEL_DIR}" ]]; then 175 echo "${ANDROID_BUILD_TOP} doesn't appear to be the root of an android tree." 176 echo " ${ANDROID_KERNEL_DIR} is not a directory." 177 exit 1 178fi 179 180if [[ -d "${KERNEL_DIR}/linux-stable" ]]; then 181 src_dir="linux-stable" 182else 183 src_dir="common" 184fi 185 186if [[ ${KERNEL_DOWNLOAD} -eq 1 ]]; then 187 TMPDIR=$(mktemp -d /tmp/android_kernelXXXXXXXX) 188 cd "${TMPDIR}" 189 echo "Fetching android kernel source ${KERNEL_VERSION}" 190 git clone https://android.googlesource.com/kernel/common.git 191 cd "${src_dir}" 192 git checkout "${KERNEL_VERSION}" 193 KERNEL_DIR="${TMPDIR}" 194elif [[ "${KERNEL_DIR}" == "" ]]; then 195 echo "Must specify one of --use-kernel-dir or --download-kernel." 196 exit 1 197elif [[ ! -d "${KERNEL_DIR}" ]] || [[ ! -d "${KERNEL_DIR}/${src_dir}" ]]; then 198 echo "The kernel directory $KERNEL_DIR or $KERNEL_DIR/${src_dir} does not exist." 199 exit 1 200else 201 cd "${KERNEL_DIR}/${src_dir}" 202fi 203 204if [[ ${SKIP_GENERATION} -eq 0 ]]; then 205 # Build all of the generated headers. 206 for arch in "${ARCH_LIST[@]}"; do 207 echo "Generating headers for arch ${arch}" 208 make ARCH=${arch} headers_install 209 done 210fi 211 212cd ${ANDROID_BUILD_TOP} 213 214# Copy all of the include/uapi files to the kernel headers uapi directory. 215copy_hdrs "${KERNEL_DIR}/${src_dir}/include/uapi" "${ANDROID_KERNEL_DIR}/uapi" 216 217# Copy the staging files to uapi/linux. 218copy_hdrs "${KERNEL_DIR}/${src_dir}/drivers/staging/android/uapi" \ 219 "${ANDROID_KERNEL_DIR}/uapi/linux" "no-copy-dirs" 220 221# Copy the generated headers. 222copy_hdrs "${KERNEL_DIR}/${src_dir}/include/generated/uapi" \ 223 "${ANDROID_KERNEL_DIR}/uapi" 224 225for arch in "${ARCH_LIST[@]}"; do 226 # Copy arch headers. 227 copy_hdrs "${KERNEL_DIR}/${src_dir}/arch/${arch}/include/uapi" \ 228 "${ANDROID_KERNEL_DIR}/uapi/asm-${arch}" 229 # Copy the generated arch headers. 230 copy_hdrs "${KERNEL_DIR}/${src_dir}/arch/${arch}/include/generated/uapi" \ 231 "${ANDROID_KERNEL_DIR}/uapi/asm-${arch}" 232 233 # Special copy of generated header files from arch/<ARCH>/generated/asm that 234 # also exist in uapi/asm-generic. 235 copy_if_exists "${KERNEL_DIR}/${src_dir}/include/uapi/asm-generic" \ 236 "${KERNEL_DIR}/${src_dir}/arch/${arch}/include/generated/asm" \ 237 "${ANDROID_KERNEL_DIR}/uapi/asm-${arch}/asm" 238done 239 240# Verify if modified headers have changed. 241check_hdrs "${KERNEL_DIR}/${src_dir}/include/scsi" \ 242 "${ANDROID_KERNEL_DIR}/scsi" \ 243 "${KERNEL_DIR}/${src_dir}" 244