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 ### --verify-modified-headers-only <DIR> 34 ### Do not build anything, simply verify that the set of modified 35 ### kernel headers have not changed. 36 37 # Terminate the script if any command fails. 38 set -eE 39 40 TMPDIR="" 41 ANDROID_DIR="" 42 KERNEL_VERSION="android-3.10" 43 KERNEL_DIR="" 44 KERNEL_DOWNLOAD=0 45 ARCH_LIST=("arm" "arm64" "mips" "x86") 46 ANDROID_KERNEL_DIR="external/kernel-headers/original" 47 SKIP_GENERATION=0 48 VERIFY_HEADERS_ONLY=0 49 50 function cleanup () { 51 if [[ "${TMPDIR}" =~ /tmp ]] && [[ -d "${TMPDIR}" ]]; then 52 echo "Removing temporary directory ${TMPDIR}" 53 rm -rf "${TMPDIR}" 54 TMPDIR="" 55 fi 56 } 57 58 function usage () { 59 grep '^###' $0 | sed -e 's/^###//' 60 } 61 62 function copy_hdrs () { 63 local src_dir=$1 64 local tgt_dir=$2 65 local dont_copy_dirs=$3 66 67 mkdir -p ${tgt_dir} 68 69 local search_dirs=() 70 71 # This only works if none of the filenames have spaces. 72 for file in $(ls -d ${src_dir}/* 2> /dev/null); do 73 if [[ -d "${file}" ]]; then 74 search_dirs+=("${file}") 75 elif [[ -f "${file}" ]] && [[ "${file}" =~ .h$ ]]; then 76 cp ${file} ${tgt_dir} 77 fi 78 done 79 80 if [[ "${dont_copy_dirs}" == "" ]]; then 81 for dir in "${search_dirs[@]}"; do 82 copy_hdrs "${dir}" ${tgt_dir}/$(basename ${dir}) 83 done 84 fi 85 } 86 87 function copy_if_exists () { 88 local check_dir=$1 89 local src_dir=$2 90 local tgt_dir=$3 91 92 mkdir -p ${tgt_dir} 93 94 # This only works if none of the filenames have spaces. 95 for file in $(ls -d ${src_dir}/* 2> /dev/null); do 96 if [[ -f "${file}" ]] && [[ "${file}" =~ .h$ ]]; then 97 # Check that this file exists in check_dir. 98 header=$(basename ${file}) 99 if [[ -f "${check_dir}/${header}" ]]; then 100 cp ${file} ${tgt_dir} 101 fi 102 fi 103 done 104 } 105 106 function verify_modified_hdrs () { 107 local src_dir=$1 108 local tgt_dir=$2 109 local kernel_dir=$3 110 111 local search_dirs=() 112 113 # This only works if none of the filenames have spaces. 114 for file in $(ls -d ${src_dir}/* 2> /dev/null); do 115 if [[ -d "${file}" ]]; then 116 search_dirs+=("${file}") 117 elif [[ -f "${file}" ]] && [[ "${file}" =~ .h$ ]]; then 118 tgt_file=${tgt_dir}/$(basename ${file}) 119 if [[ -e ${tgt_file} ]] && ! diff "${file}" "${tgt_file}" > /dev/null; then 120 if [[ ${file} =~ ${kernel_dir}/*(.+) ]]; then 121 echo "New version of ${BASH_REMATCH[1]} found in kernel headers." 122 else 123 echo "New version of ${file} found in kernel headers." 124 fi 125 echo "This file needs to be updated manually." 126 fi 127 fi 128 done 129 130 for dir in "${search_dirs[@]}"; do 131 verify_modified_hdrs "${dir}" ${tgt_dir}/$(basename ${dir}) "${kernel_dir}" 132 done 133 } 134 135 trap cleanup EXIT 136 # This automatically triggers a call to cleanup. 137 trap "exit 1" HUP INT TERM TSTP 138 139 while [ $# -gt 0 ]; do 140 case "$1" in 141 "--skip-generation") 142 SKIP_GENERATION=1 143 ;; 144 "--download-kernel") 145 KERNEL_DOWNLOAD=1 146 ;; 147 "--use-kernel-dir") 148 if [[ $# -lt 2 ]]; then 149 echo "--use-kernel-dir requires an argument." 150 exit 1 151 fi 152 shift 153 KERNEL_DIR="$1" 154 KERNEL_DOWNLOAD=0 155 ;; 156 "--verify-modified-headers-only") 157 if [[ $# -lt 2 ]]; then 158 echo "--verify-modified-headers-only requires an argument." 159 exit 1 160 fi 161 shift 162 KERNEL_DIR="$1" 163 KERNEL_DOWNLOAD=0 164 VERIFY_HEADERS_ONLY=1 165 ;; 166 "-h" | "--help") 167 usage 168 exit 1 169 ;; 170 "-"*) 171 echo "Error: Unrecognized option $1" 172 usage 173 exit 1 174 ;; 175 *) 176 echo "Error: Extra arguments on the command-line." 177 usage 178 exit 1 179 ;; 180 esac 181 shift 182 done 183 184 ANDROID_KERNEL_DIR="${ANDROID_BUILD_TOP}/${ANDROID_KERNEL_DIR}" 185 if [[ "${ANDROID_BUILD_TOP}" == "" ]]; then 186 echo "ANDROID_BUILD_TOP is not set, did you run lunch?" 187 exit 1 188 elif [[ ! -d "${ANDROID_KERNEL_DIR}" ]]; then 189 echo "${ANDROID_BUILD_TOP} doesn't appear to be the root of an android tree." 190 echo " ${ANDROID_KERNEL_DIR} is not a directory." 191 exit 1 192 fi 193 194 if [[ -d "${KERNEL_DIR}/linux-stable" ]]; then 195 src_dir="linux-stable" 196 else 197 src_dir="common" 198 fi 199 200 if [[ ${VERIFY_HEADERS_ONLY} -eq 1 ]]; then 201 # Verify if modified headers have changed. 202 verify_modified_hdrs "${KERNEL_DIR}/${src_dir}/include/scsi" \ 203 "${ANDROID_KERNEL_DIR}/scsi" \ 204 "${KERNEL_DIR}/${src_dir}" 205 exit 0 206 fi 207 208 if [[ ${KERNEL_DOWNLOAD} -eq 1 ]]; then 209 TMPDIR=$(mktemp -d /tmp/android_kernelXXXXXXXX) 210 cd "${TMPDIR}" 211 echo "Fetching android kernel source ${KERNEL_VERSION}" 212 git clone https://android.googlesource.com/kernel/common.git 213 cd "${src_dir}" 214 git checkout "${KERNEL_VERSION}" 215 KERNEL_DIR="${TMPDIR}" 216 elif [[ "${KERNEL_DIR}" == "" ]]; then 217 echo "Must specify one of --use-kernel-dir or --download-kernel." 218 exit 1 219 elif [[ ! -d "${KERNEL_DIR}" ]] || [[ ! -d "${KERNEL_DIR}/${src_dir}" ]]; then 220 echo "The kernel directory $KERNEL_DIR or $KERNEL_DIR/${src_dir} does not exist." 221 exit 1 222 else 223 cd "${KERNEL_DIR}/${src_dir}" 224 fi 225 226 if [[ ${SKIP_GENERATION} -eq 0 ]]; then 227 # Clean up any leftover headers. 228 make distclean 229 230 # Build all of the generated headers. 231 for arch in "${ARCH_LIST[@]}"; do 232 echo "Generating headers for arch ${arch}" 233 make ARCH=${arch} headers_install 234 done 235 fi 236 237 # Completely delete the old original headers so that any deleted/moved 238 # headers are also removed. 239 rm -rf "${ANDROID_KERNEL_DIR}/uapi" 240 mkdir -p "${ANDROID_KERNEL_DIR}/uapi" 241 242 cd ${ANDROID_BUILD_TOP} 243 244 # Copy all of the include/uapi files to the kernel headers uapi directory. 245 copy_hdrs "${KERNEL_DIR}/${src_dir}/include/uapi" "${ANDROID_KERNEL_DIR}/uapi" 246 247 # Copy the staging files to uapi/linux. 248 copy_hdrs "${KERNEL_DIR}/${src_dir}/drivers/staging/android/uapi" \ 249 "${ANDROID_KERNEL_DIR}/uapi/linux" "no-copy-dirs" 250 251 # Copy the generated headers. 252 copy_hdrs "${KERNEL_DIR}/${src_dir}/include/generated/uapi" \ 253 "${ANDROID_KERNEL_DIR}/uapi" 254 255 for arch in "${ARCH_LIST[@]}"; do 256 # Copy arch headers. 257 copy_hdrs "${KERNEL_DIR}/${src_dir}/arch/${arch}/include/uapi" \ 258 "${ANDROID_KERNEL_DIR}/uapi/asm-${arch}" 259 # Copy the generated arch headers. 260 copy_hdrs "${KERNEL_DIR}/${src_dir}/arch/${arch}/include/generated/uapi" \ 261 "${ANDROID_KERNEL_DIR}/uapi/asm-${arch}" 262 263 # Special copy of generated header files from arch/<ARCH>/generated/asm that 264 # also exist in uapi/asm-generic. 265 copy_if_exists "${KERNEL_DIR}/${src_dir}/include/uapi/asm-generic" \ 266 "${KERNEL_DIR}/${src_dir}/arch/${arch}/include/generated/asm" \ 267 "${ANDROID_KERNEL_DIR}/uapi/asm-${arch}/asm" 268 done 269 270 # The arm types.h uapi header is not properly being generated, so copy it 271 # directly. 272 cp "${KERNEL_DIR}/${src_dir}/include/uapi/asm-generic/types.h" \ 273 "${ANDROID_KERNEL_DIR}/uapi/asm-arm/asm" 274 275 # Verify if modified headers have changed. 276 verify_modified_hdrs "${KERNEL_DIR}/${src_dir}/include/scsi" \ 277 "${ANDROID_KERNEL_DIR}/scsi" \ 278 "${KERNEL_DIR}/${src_dir}" 279
