generate_uapi_headers.sh revision e994d41578c05800bc09ca5b2deb8fca9f72424f 
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
83trap cleanup EXIT
84# This automatically triggers a call to cleanup.
85trap "exit 1" HUP INT TERM TSTP
86
87while [ $# -gt 0 ]; do
88  case "$1" in
89    "--skip-generation")
90      SKIP_GENERATION=1
91      ;;
92    "--download-kernel")
93      KERNEL_DOWNLOAD=1
94      ;;
95    "--use-kernel-dir")
96      if [[ $# -lt 2 ]]; then
97        echo "--use-kernel-dir requires an argument."
98        exit 1
99      fi
100      shift
101      KERNEL_DIR="$1"
102      KERNEL_DOWNLOAD=0
103      ;;
104    "-h" | "--help")
105      usage
106      exit 1
107      ;;
108    "-"*)
109      echo "Error: Unrecognized option $1"
110      usage
111      exit 1
112      ;;
113    *)
114      echo "Error: Extra arguments on the command-line."
115      usage
116      exit 1
117      ;;
118  esac
119  shift
120done
121
122ANDROID_KERNEL_DIR="${ANDROID_BUILD_TOP}/${ANDROID_KERNEL_DIR}"
123if [[ "${ANDROID_BUILD_TOP}" == "" ]]; then
124  echo "ANDROID_BUILD_TOP is not set, did you run lunch?"
125  exit 1
126elif [[ ! -d "${ANDROID_KERNEL_DIR}" ]]; then
127  echo "${ANDROID_BUILD_TOP} doesn't appear to be the root of an android tree."
128  echo "  ${ANDROID_KERNEL_DIR} is not a directory."
129  exit 1
130fi
131
132if [[ ${KERNEL_DOWNLOAD} -eq 1 ]]; then
133  TMPDIR=$(mktemp -d /tmp/android_kernelXXXXXXXX)
134  cd "${TMPDIR}"
135  echo "Fetching android kernel source ${KERNEL_VERSION}"
136  git clone https://android.googlesource.com/kernel/common.git
137  cd common
138  git checkout "${KERNEL_VERSION}"
139  KERNEL_DIR="${TMPDIR}"
140elif [[ "${KERNEL_DIR}" == "" ]]; then
141  echo "Must specify one of --use-kernel-dir or --download-kernel."
142  exit 1
143elif [[ ! -d "${KERNEL_DIR}" ]] || [[ ! -d "${KERNEL_DIR}/common" ]]; then
144  echo "The kernel directory $KERNEL_DIR or $KERNEL_DIR/common does not exist."
145  exit 1
146else
147  cd "${KERNEL_DIR}/common"
148fi
149
150if [[ ${SKIP_GENERATION} -eq 0 ]]; then
151  # Build all of the generated headers.
152  for arch in "${ARCH_LIST[@]}"; do
153    echo "Generating headers for arch ${arch}"
154    make ARCH=${arch} headers_install
155  done
156fi
157
158# Copy all of the include/uapi files to the kernel headers uapi directory.
159copy_hdrs "${KERNEL_DIR}/common/include/uapi" "${ANDROID_KERNEL_DIR}/uapi"
160
161copy_hdrs "${KERNEL_DIR}/common/drivers/staging/android/uapi" \
162          "${ANDROID_KERNEL_DIR}/uapi/linux" "no-copy-dirs"
163
164copy_hdrs "${KERNEL_DIR}/common/include/generated/uapi" \
165          "${ANDROID_KERNEL_DIR}/uapi"
166
167for arch in "${ARCH_LIST[@]}"; do
168  if [[ "$arch" == "arm64" ]]; then
169    # The Android headers use aarch64 as the name of the 64 bit arm headers.
170    tgt_arch="asm-aarch64"
171  else
172    tgt_arch="asm-${arch}"
173  fi
174  # Copy arch headers first.
175  copy_hdrs "${KERNEL_DIR}/common/arch/${arch}/include/uapi" \
176            "${ANDROID_KERNEL_DIR}/uapi/${tgt_arch}"
177  # Copy the generated arch header files.
178  copy_hdrs "${KERNEL_DIR}/common/arch/${arch}/include/generated/uapi" \
179            "${ANDROID_KERNEL_DIR}/uapi/${tgt_arch}"
180done
181