aiden
/
Android_boot_image_editor
mirror of https://github.com/cfig/Android_boot_image_editor
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

mass update for next generation boot.img

Browse Source 
remove original abootimg by Gilles Grandou <gilles@grandou.net>
create groovy abootimg and mkbootimg
previous bootimg.cfg moved to bootimg.json
update doc: README.expert.md
pull/6/head
cfig 9 years ago
parent 56dacf31bd
commit 460c5b05eb
12 changed files with 680 additions and 1065 deletions
Show Stats Download Patch File Download Diff File

58
README.expert.md
Unescape Escape View File

@ -0,0 +1,58 @@
# layout of boot.img
### 1. header part
item size in bytes
+----------------------------------------------------------+
|<MAGIC HEADER> | 8 |
|--------------------------------+-------------------------|
|<kernel length> | 4 |
|--------------------------------+-------------------------|
|<kernel offset> | 4 |
|--------------------------------+-------------------------|
|<ramdisk length> | 4 |
|--------------------------------+-------------------------|
|<ramdisk offset> | 4 |
|--------------------------------+-------------------------|
|<second bootloader length> | 4 |
|--------------------------------+-------------------------|
|<second bootloader offset> | 4 |
|--------------------------------+-------------------------|
|<tags offset> | 4 |
|--------------------------------+-------------------------|
|<page size> | 4 |
|--------------------------------+-------------------------|
| RESERVED | 4 |
|--------------------------------+-------------------------|
|<os version& os patch level> | 4 |
|--------------------------------+-------------------------|
|<board name> | 16 |
|--------------------------------+-------------------------|
|<cmdline part 1> | 512 |
|--------------------------------+-------------------------|
|<hash digest> | 32 |
|--------------------------------+-------------------------|
|<cmdline part 2> | 1024 |
|--------------------------------+-------------------------|
|<padding> | min(n * page_zie - 1632)|
+----------------------------------------------------------+
### 2. data part
+----------------------------------------------------------+
|<kernel> | kernel length |
|--------------------------------+-------------------------|
|<padding> | |
+----------------------------------------------------------+
+--------------------------------+-------------------------+
|<ramdisk> | ramdisk length |
|--------------------------------+-------------------------|
|<padding> | |
+----------------------------------------------------------+
+--------------------------------+-------------------------+
|<second bootloader> | second bootloader length|
|--------------------------------+-------------------------|
|<padding> | |
+----------------------------------------------------------+

2
README.md
Unescape Escape View File

@ -33,7 +33,7 @@ Then put your boot.img at **$(CURDIR)/boot.img**, then start gradle 'unpack' tas
Your get the flattened kernel and /root filesystem under **$(CURDIR)/build/unzip\_boot**:
build/unzip_boot/
├── bootimg.cfg
├── bootimg.json
├── kernel
└── root

34
abootimg/build.gradle
Unescape Escape View File

@ -0,0 +1,34 @@
apply plugin: 'groovy'
apply plugin: 'java'
sourceCompatibility = 1.7
repositories {
mavenCentral()
}
dependencies {
compile 'org.codehaus.groovy:groovy-all:2.3.11'
compile group: 'net.sf.jopt-simple', name: 'jopt-simple', version: '5.0.2'
testCompile group: 'junit', name: 'junit', version: '4.11'
}
task abootimg(type: Jar, dependsOn:['build']) {
from files(sourceSets.main.output.classesDir)
from configurations.runtime.asFileTree.files.collect { zipTree(it) }
baseName = 'abootimg'
manifest {
attributes 'Main-Class': 'cfig.bootimg.abootimg'
}
}
task mkbootimg(type: Jar, dependsOn:['build']) {
from files(sourceSets.main.output.classesDir)
from configurations.runtime.asFileTree.files.collect { zipTree(it) }
baseName = 'mkbootimg'
manifest {
attributes 'Main-Class': 'cfig.bootimg.mkbootimg'
}
}

34
abootimg/src/main/groovy/cfig/bootimg/CArgs.groovy
Unescape Escape View File

@ -0,0 +1,34 @@
package cfig.bootimg
import groovy.transform.ToString
/**
* Created by yu at 09:57 on 2016-06-17
*/
@ToString(includeNames = true, includeFields = true)
class CArgs {
public String kernel;
public String ramdisk;
public String output;
public String cfg;
public String board;
public String second;
public String cmdline;
public String os_version;
public String os_patch_level;
public int base;
public int kernel_offset;
public int ramdisk_offset;
public int second_offset;
public int pagesize;
public int tags_offset;
public boolean id;
CArgs() {
kernel = "kernel";
ramdisk = "ramdisk.img.gz";
second = "second";
output = "boot.img";
cfg = "bootimg.json";
}
}

20
abootimg/src/main/groovy/cfig/bootimg/CImgInfo.groovy
Unescape Escape View File

@ -0,0 +1,20 @@
package cfig.bootimg
import groovy.transform.ToString
/**
* Created by yu at 09:58 on 2016-06-17
*/
@ToString(includeNames=true, includeFields=true)
class CImgInfo extends CArgs {
public int kernel_len;
public int ramdisk_len;
public int second_len;
public int kernel_pos;
public int ramdisk_pos;
public int second_pos;
public byte[] hash;
public String dump() {
return super.toString() + " ; " + toString();
}
}

182
abootimg/src/main/groovy/cfig/bootimg/abootimg.groovy
Unescape Escape View File

@ -0,0 +1,182 @@
package cfig.bootimg
import groovy.json.JsonBuilder
import java.nio.ByteBuffer
// http://mvnrepository.com/artifact/net.sf.jopt-simple/jopt-simple
//@Grapes(
// @Grab(group='net.sf.jopt-simple', module='jopt-simple', version='5.0.1')
//)
import java.nio.ByteOrder
int readInt(InputStream is) {
ByteBuffer bf = ByteBuffer.allocate(128);
bf.order(ByteOrder.LITTLE_ENDIAN);
byte[] data4 = new byte[4];
assert 4 == is.read(data4)
bf.clear();
bf.put(data4);
bf.flip();
return bf.getInt();
}
byte[] readBytes(InputStream is, int len) {
byte[] data4 = new byte[len];
assert len == is.read(data4)
return data4;
}
String unparse_os_version(int x) {
int a = x >> 14;
int b = (x - (a << 14)) >> 7;
int c = x & 0x7f;
return String.format("%d.%d.%d", a, b, c);
}
String unparse_os_patch_level(int x) {
int y = x >> 4;
int m = x & 0xf;
y += 2000;
return String.format("%d-%d-%d", y, m, 0);
}
int get_header_len(int pagesize) {
int pad = (pagesize - (1632 & (pagesize - 1))) & (pagesize - 1);
return pad + 1632;
}
int get_pad_len(int position, int pagesize) {
return (pagesize - (position & (pagesize - 1))) & (pagesize - 1);
}
String bytes2String(byte[] inData) {
StringBuilder sb = new StringBuilder("");
for (int i = 0; i < inData.length; i++) {
sb.append(Integer.toString((inData[i] & 0xff) + 0x100, 16).substring(1));
}
return sb.toString();
}
void parse_header(String fileName, CImgInfo inImgInfo) {
InputStream is = new FileInputStream(new File(fileName))
assert Arrays.equals(readBytes(is, 8), "ANDROID!".getBytes())
inImgInfo.kernel_len = readInt(is);
inImgInfo.kernel_offset = readInt(is);
inImgInfo.ramdisk_len = readInt(is);
inImgInfo.ramdisk_offset = readInt(is);
inImgInfo.second_len = readInt(is);
inImgInfo.second_offset = readInt(is);
inImgInfo.tags_offset = readInt(is);
inImgInfo.pagesize = readInt(is);
assert 0 == readInt(is) //reserved
int os_and_patch = readInt(is)
if (0 != os_and_patch) { //treated as 'reserved' in this boot image
inImgInfo.os_version = unparse_os_version(os_and_patch >> 11)
inImgInfo.os_patch_level = unparse_os_patch_level(os_and_patch & 0x7ff)
}
inImgInfo.board = new String(readBytes(is, 16), "UTF-8").trim();
inImgInfo.cmdline = new String(readBytes(is, 512), "UTF-8")
inImgInfo.hash = readBytes(is, 32); //hash
inImgInfo.cmdline += new String(readBytes(is, 1024), "UTF-8")
inImgInfo.cmdline = inImgInfo.cmdline.trim();
is.close();
//calc subimg positions
inImgInfo.kernel_pos = get_header_len(inImgInfo.pagesize)
inImgInfo.ramdisk_pos = inImgInfo.kernel_pos + inImgInfo.kernel_len + get_pad_len(inImgInfo.kernel_len, inImgInfo.pagesize)
inImgInfo.second_pos = inImgInfo.ramdisk_pos + inImgInfo.ramdisk_len + get_pad_len(inImgInfo.ramdisk_len, inImgInfo.pagesize)
//adjust args
if (inImgInfo.kernel_offset > 0x10000000) {
inImgInfo.base = 0x10000000;
inImgInfo.kernel_offset -= inImgInfo.base;
inImgInfo.ramdisk_offset -= inImgInfo.base;
inImgInfo.second_offset -= inImgInfo.base;
inImgInfo.tags_offset -= inImgInfo.base;
}
}
void extract_img_header(CImgInfo inImgInfo) {
JsonBuilder jb = new JsonBuilder();
hashString = bytes2String(inImgInfo.hash);
jb.bootimg {
args {
// kernel inImgInfo.kernel;
// ramdisk inImgInfo.ramdisk;
// second inImgInfo.second;
// output inImgInfo.output;
base "0x" + Integer.toHexString(inImgInfo.base);
kernel_offset "0x" + Integer.toHexString(inImgInfo.kernel_offset);
ramdisk_offset "0x" + Integer.toHexString(inImgInfo.ramdisk_offset);
second_offset "0x" + Integer.toHexString(inImgInfo.second_offset);
tags_offset "0x" + Integer.toHexString(inImgInfo.tags_offset);
pagesize inImgInfo.pagesize;
board inImgInfo.board;
cmdline inImgInfo.cmdline;
os_version inImgInfo.os_version;
os_patch_level inImgInfo.os_patch_level;
id inImgInfo.id;
}
img {
kernel_pos inImgInfo.kernel_pos;
kernel_len inImgInfo.kernel_len;
ramdisk_pos inImgInfo.ramdisk_pos;
ramdisk_len inImgInfo.ramdisk_len;
second_pos inImgInfo.second_pos;
second_len inImgInfo.second_len;
hash hashString;
}
}
FileWriter fw = new FileWriter(inImgInfo.cfg);
fw.write(jb.toPrettyString());
fw.flush();
fw.close();
}
void extract_img_data(String inBootImg, String outImgName, int offset, int length) {
if (0 == length) {
return;
}
RandomAccessFile inRaf = new RandomAccessFile(inBootImg, "r");
RandomAccessFile outRaf = new RandomAccessFile(outImgName, "rw");
inRaf.seek(offset);
byte[] data = new byte[length];
assert length == inRaf.read(data)
outRaf.write(data);
outRaf.close();
inRaf.close();
}
void printUsage() {
println("Usage: abootimg <path_to_boot_image> [work_dir]");
System.exit(1);
}
void abootimg(String[] arg) {
CImgInfo imgInfo = new CImgInfo();
String fileName;
String workDir = "unzip_boot";
if (1 == arg.length) {
fileName = arg[0];
} else if (2 == arg.length) {
fileName = arg[0];
workDir = arg[1];
} else {
printUsage();
}
imgInfo.kernel = workDir + File.separator + imgInfo.kernel;
imgInfo.ramdisk = workDir + File.separator + imgInfo.ramdisk;
imgInfo.second = workDir + File.separator + imgInfo.second;
imgInfo.cfg = workDir + File.separator + imgInfo.cfg;
parse_header(fileName, imgInfo);
new File(workDir).mkdir();
extract_img_data(fileName, imgInfo.kernel, imgInfo.kernel_pos, imgInfo.kernel_len)
extract_img_data(fileName, imgInfo.ramdisk, imgInfo.ramdisk_pos, imgInfo.ramdisk_len)
extract_img_data(fileName, imgInfo.second, imgInfo.second_pos, imgInfo.second_len)
extract_img_header(imgInfo);
}
abootimg(args);

344
abootimg/src/main/groovy/cfig/bootimg/mkbootimg.groovy
Unescape Escape View File

@ -0,0 +1,344 @@
package cfig.bootimg
// http://mvnrepository.com/artifact/net.sf.jopt-simple/jopt-simple
//@Grapes(
// @Grab(group='net.sf.jopt-simple', module='jopt-simple', version='5.0.1')
//)
import java.nio.ByteBuffer;
import joptsimple.OptionParser;
import joptsimple.OptionSet;
import java.nio.channels.FileChannel;
import java.nio.ByteOrder;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.security.MessageDigest;
CArgs parse_cmdline(String[] inArgs) {
OptionParser parser = new OptionParser();
parser.accepts("kernel", "path to the kernel").withRequiredArg();
parser.accepts("ramdisk", "path to the ramdisk").withRequiredArg();
parser.accepts("second", "path to the 2nd bootloader").withRequiredArg();
parser.accepts("cmdline", "extra arguments to be passed on the kernel command line").withRequiredArg();
parser.accepts("base", "base address").withRequiredArg();
parser.accepts("kernel_offset", "kernel offset").withRequiredArg();
parser.accepts("ramdisk_offset", "ramdisk offset").withRequiredArg();
parser.accepts("second_offset", "2nd bootloader offset").withRequiredArg();
parser.accepts("os_version", "operating system version").withRequiredArg();
parser.accepts("os_patch_level", "operating system patch level").withRequiredArg();
parser.accepts("tags_offset", "tags offset").withRequiredArg();
parser.accepts("board", "board name").withRequiredArg();
parser.accepts("pagesize", "page size").withRequiredArg();
parser.accepts("id", "print the image ID on standard output");
parser.accepts("output", "output file name").withRequiredArg();
OptionSet options = parser.parse(inArgs)
CArgs ret = new CArgs();
ret.kernel = options.valueOf("kernel")
ret.output = options.valueOf("output")
ret.ramdisk = options.valueOf("ramdisk")
ret.second = options.valueOf("second")
if (options.has("board")) {
ret.board = options.valueOf("board")
} else {
ret.board = ""
}
ret.id = options.has("id")
if (options.has("base")) {
ret.base = Integer.decode(options.valueOf("base"))
} else {
ret.base = 0x10000000;
}
if (options.has("kernel_offset")) {
ret.kernel_offset = Integer.decode(options.valueOf("kernel_offset"))
} else {
ret.kernel_offset = 0x00008000;
}
if (options.has("ramdisk_offset")) {
ret.ramdisk_offset = Integer.decode(options.valueOf("ramdisk_offset"))
} else {
ret.ramdisk_offset = 0x01000000
}
ret.os_version = options.valueOf("os_version")
ret.os_patch_level = options.valueOf("os_patch_level")
if (options.has("second_offset")) {
ret.second_offset = Integer.decode(options.valueOf("second_offset"))
} else {
ret.second_offset = 0x00f00000
}
if (options.has("tags_offset")) {
ret.tags_offset = Integer.decode(options.valueOf("tags_offset"))
} else {
ret.tags_offset = 0x00000100
}
if (options.has("pagesize")) {
ret.pagesize = Integer.decode(options.valueOf("pagesize"))
} else {
ret.pagesize = 2048
}
if (options.has("cmdline")) {
ret.cmdline = options.valueOf("cmdline")
} else {
ret.cmdline = ""
}
if (ret.cmdline.length() > 1536) {
println("cmdline length must <= 1536, current is " + ret.cmdline.length());
printUsage(parser);
}
if (null == ret.kernel) {
println("kernel must not be empty");
printUsage(parser);
}
if (null == ret.output) {
println("output file must not be empty");
printUsage(parser);
}
if (ret.board.length() > 16) {
println("board name length must <= 16")
printUsage(parser);
}
return ret;
}
byte[] write_header(CArgs inArgs) {
ByteBuffer bf = ByteBuffer.allocate(1024 * 32);
bf.order(ByteOrder.LITTLE_ENDIAN);
//header start
bf.put("ANDROID!".getBytes())
bf.putInt((int) new File(inArgs.kernel).length());
bf.putInt(inArgs.base + inArgs.kernel_offset)
if (null == inArgs.ramdisk) {
bf.putInt(0)
} else {
bf.putInt((int) new File(inArgs.ramdisk).length());
}
bf.putInt(inArgs.base + inArgs.ramdisk_offset)
if (null == inArgs.second) {
bf.putInt(0)
} else {
bf.putInt((int) new File(inArgs.second).length());
}
bf.putInt(inArgs.base + inArgs.second_offset)
bf.putInt(inArgs.base + inArgs.tags_offset)
bf.putInt(inArgs.pagesize)
bf.putInt(0);
bf.putInt((parse_os_version(inArgs.os_version) << 11) | parse_os_patch_level(inArgs.os_patch_level))
bf.put(inArgs.board.getBytes())
bf.put(new byte[16 - inArgs.board.length()])
bf.put(inArgs.cmdline.substring(0, Math.min(512, inArgs.cmdline.length())).getBytes())
bf.put(new byte[512 - Math.min(512, inArgs.cmdline.length())])
byte[] img_id = hashFile(inArgs.kernel, inArgs.ramdisk, inArgs.second)
bf.put(img_id)
bf.put(new byte[32 - img_id.length])
if (inArgs.cmdline.length() > 512) {
bf.put(inArgs.cmdline.substring(512).getBytes())
bf.put(new byte[1024 + 512 - inArgs.cmdline.length()])
} else {
bf.put(new byte[1024])
}
//padding
pad_file(bf, inArgs.pagesize)
//write
FileOutputStream fos = new FileOutputStream(inArgs.output, false);
fos.write(bf.array(), 0, bf.position())
fos.close();
return img_id;
}
void printUsage(OptionParser p) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
out.write("Usage: mkbootimg <option>\n".getBytes());
p.printHelpOn(out);
System.out.println(out.toString());
out.close();
System.exit(1);
}
void write_padded_file(ByteBuffer inBF, String srcFile, int padding) {
if (null == srcFile) {
return;
}
InputStream is = new FileInputStream(new File(srcFile))
int byteRead;
byte[] dataRead = new byte[128]
while (true) {
byteRead = is.read(dataRead)
if (-1 == byteRead) {
break;
}
inBF.put(dataRead, 0, byteRead);
}
is.close();
pad_file(inBF, padding)
}
void pad_file(ByteBuffer inBF, int padding) {
int pad = (padding - (inBF.position() & (padding - 1))) & (padding - 1);
inBF.put(new byte[pad]);
}
void write_data(CArgs inArgs) {
ByteBuffer bf = ByteBuffer.allocate(1024 * 1024 * 64);
bf.order(ByteOrder.LITTLE_ENDIAN);
write_padded_file(bf, inArgs.kernel, inArgs.pagesize)
write_padded_file(bf, inArgs.ramdisk, inArgs.pagesize)
write_padded_file(bf, inArgs.second, inArgs.pagesize)
//write
FileOutputStream fos = new FileOutputStream(inArgs.output, true);
fos.write(bf.array(), 0, bf.position())
fos.close();
}
int parse_os_patch_level(x) {
if (null == x) {
return 0;
}
int ret = 0
Pattern pattern = Pattern.compile("^(\\d{4})-(\\d{2})-(\\d{2})")
Matcher matcher = pattern.matcher(x)
if (matcher.find()) {
int y = Integer.decode(matcher.group(1)) - 2000
int m = Integer.decode(matcher.group(2))
// 7 bits allocated for the year, 4 bits for the month
assert y >= 0 && y < 128
assert m > 0 && m <= 12
ret = (y << 4) | m
} else {
throw new IllegalArgumentException("invalid os_patch_level")
}
return ret;
}
int parse_os_version(x) {
int ret = 0;
if (null != x) {
Pattern pattern = Pattern.compile("^(\\d{1,3})(?:\\.(\\d{1,3})(?:\\.(\\d{1,3}))?)?");
Matcher m = pattern.matcher(x)
if (m.find()) {
int a = Integer.decode(m.group(1))
int b = 0;
int c = 0;
if (m.groupCount() >= 2) {
b = Integer.decode(m.group(2))
}
if (m.groupCount() == 3) {
c = Integer.decode(m.group(3))
}
assert a < 128
assert b < 128
assert c < 128
ret = ((a << 14) | (b << 7) | c)
} else {
throw new IllegalArgumentException("invalid os_version")
}
}
return ret;
}
void test() {
ByteBuffer b2 = ByteBuffer.allocate(1024);
b2.order(ByteOrder.LITTLE_ENDIAN);
b2.putInt(Integer.MAX_VALUE); //4 bytes
println("max: " + Integer.MAX_VALUE)
println("min: " + Integer.MIN_VALUE)
b2.putInt(0x11111111)
b2.putInt(Integer.MIN_VALUE);
b2.putInt(0x11111111)
b2.put("welcome".getBytes())
b2.put(new byte[5]);
b2.putInt(0x11111111)
b2.putInt(0);
b2.putInt(0x11111111)
//b2.put((byte)0);
b2.flip();
FileChannel fc2 = new FileOutputStream(new File("ftest"), false).getChannel();
fc2.write(b2);
fc2.close();
//ByteBuffer bf = ByteBuffer.allocate(1024 * 1024 * 50);
//bf.order(ByteOrder.LITTLE_ENDIAN);
//bf.flip()
//boolean append = false;
//FileChannel fc = new FileOutputStream(new File("f1"), append).getChannel();
//fc.write(bf);
//fc.close();
//
//FileOutputStream stream = new FileOutputStream("f2");
//stream.write(bf.array(), 0, bf.position())
//stream.close();
}
byte[] hashFile(String... inFiles) {
MessageDigest md = MessageDigest.getInstance("SHA1")
for (String item : inFiles) {
ByteBuffer itemBF = ByteBuffer.allocate(4).order(ByteOrder.LITTLE_ENDIAN);
if (null == item) {
md.update(itemBF.putInt(0).array())
} else {
InputStream is = new FileInputStream(new File(item))
int byteRead;
byte[] dataRead = new byte[128]
while (true) {
byteRead = is.read(dataRead)
if (-1 == byteRead) {
break;
}
md.update(dataRead, 0, byteRead)
}
is.close();
md.update(itemBF.putInt((int) new File(item).length()).array())
}
}
return md.digest();
}
void dumpBytes(byte[] inData) {
StringBuffer sb = new StringBuffer("");
for (int i = 0; i < inData.length; i++) {
sb.append(Integer.toString((inData[i] & 0xff) + 0x100, 16).substring(1));
}
println("0x" + sb.toString());
}
CArgs theArgs = parse_cmdline(args)
byte[] img_id = write_header(theArgs)
write_data(theArgs)
if (theArgs.id) {
ByteBuffer bf = ByteBuffer.allocate(32);
bf.order(ByteOrder.LITTLE_ENDIAN);
bf.put(img_id);
bf.put(new byte[32 - img_id.length])
dumpBytes(bf.array());
}

19
build.gradle
Unescape Escape View File

@ -1,5 +1,6 @@
apply plugin: 'c'
apply plugin: 'java'
apply plugin: 'groovy'
import java.io.FileInputStream;
import java.io.FileOutputStream;
@ -16,15 +17,6 @@ model {
release
}
components {
abootimg(NativeExecutableSpec) {
binaries.all {
cppCompiler.define 'HAS_BLKID'
linker.args "-lblkid"
}
}
}
components {
mkbootfs(NativeExecutableSpec) {
binaries.all {
@ -53,7 +45,7 @@ println("Active image target: " + activeImg);
// ----------------------------------------------------------------------------
// tasks
// ----------------------------------------------------------------------------
task unpack_bootimg(type: Exec, dependsOn: 'abootimgExecutable') {
task unpack_bootimg(type: JavaExec, dependsOn: ['abootimg:abootimg']) {
doFirst {
def rootdir = new File(workdir)
if (rootdir.exists()) {
@ -61,9 +53,10 @@ task unpack_bootimg(type: Exec, dependsOn: 'abootimgExecutable') {
}
rootdir.mkdirs()
}
workingDir '.'
executable 'build/exe/abootimg/abootimg'
args = ['-x', activeImg, workdir+'/bootimg.cfg', workdir+'/kernel', workdir+'/ramdisk.img.gz']
main = 'cfig.bootimg.abootimg'
classpath = files("abootimg/build/libs/abootimg.jar")
maxHeapSize '512m'
args String.format("%s", activeImg), workdir
}
task unpack_ramdisk_gz << {

1
settings.gradle
Unescape Escape View File

@ -1,3 +1,4 @@
include 'bouncycastle:bcpkix'
include 'bouncycastle:bcprov'
include 'boot_signer'
include 'abootimg'

952
src/abootimg/c/abootimg.c
Unescape Escape View File

@ -1,952 +0,0 @@
/* abootimg - Manipulate (read, modify, create) Android Boot Images
* Copyright (c) 2010-2011 Gilles Grandou <gilles@grandou.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <stdarg.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <unistd.h>
#ifdef __linux__
#include <sys/ioctl.h>
#include <linux/fs.h> /* BLKGETSIZE64 */
#endif
#ifdef __CYGWIN__
#include <sys/ioctl.h>
#include <cygwin/fs.h> /* BLKGETSIZE64 */
#endif
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
#include <sys/disk.h> /* DIOCGMEDIASIZE */
#include <sys/sysctl.h>
#endif
#if defined(__APPLE__)
# include <sys/disk.h> /* DKIOCGETBLOCKCOUNT */
#endif
#ifdef HAS_BLKID
#include <blkid/blkid.h>
#endif
#include "version.h"
#include "bootimg.h"
enum command {
none,
help,
info,
extract,
update,
create
};
typedef struct
{
unsigned size;
int is_blkdev;
char* fname;
char* config_fname;
char* kernel_fname;
char* ramdisk_fname;
char* second_fname;
FILE* stream;
boot_img_hdr header;
char* kernel;
char* ramdisk;
char* second;
} t_abootimg;
#define MAX_CONF_LEN 4096
char config_args[MAX_CONF_LEN] = "";
void abort_perror(char* str)
{
perror(str);
exit(errno);
}
void abort_printf(char *fmt, ...)
{
va_list args;
va_start(args, fmt);
vfprintf(stderr, fmt, args);
va_end(args);
fprintf(stderr, "\n");
exit(1);
}
int blkgetsize(int fd, unsigned long long *pbsize)
{
# if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
return ioctl(fd, DIOCGMEDIASIZE, pbsize);
# elif defined(__APPLE__)
return ioctl(fd, DKIOCGETBLOCKCOUNT, pbsize);
# elif defined(__NetBSD__)
// does a suitable ioctl exist?
// return (ioctl(fd, DIOCGDINFO, &label) == -1);
return 1;
# elif defined(__linux__) || defined(__CYGWIN__)
return ioctl(fd, BLKGETSIZE64, pbsize);
# elif defined(__GNU__)
// does a suitable ioctl for HURD exist?
return 1;
# else
return 1;
# endif
}
void print_usage(void)
{
printf (
" abootimg - manipulate Android Boot Images.\n"
" (c) 2010-2011 Gilles Grandou <gilles@grandou.net>\n"
" " VERSION_STR "\n"
"\n"
" abootimg [-h]\n"
"\n"
" print usage\n"
"\n"
" abootimg -i <bootimg>\n"
"\n"
" print boot image information\n"
"\n"
" abootimg -x <bootimg> [<bootimg.cfg> [<kernel> [<ramdisk> [<secondstage>]]]]\n"
"\n"
" extract objects from boot image:\n"
" - config file (default name bootimg.cfg)\n"
" - kernel image (default name zImage)\n"
" - ramdisk image (default name initrd.img)\n"
" - second stage image (default name stage2.img)\n"
"\n"
" abootimg -u <bootimg> [-c \"param=value\"] [-f <bootimg.cfg>] [-k <kernel>] [-r <ramdisk>] [-s <secondstage>]\n"
"\n"
" update a current boot image with objects given in command line\n"
" - header informations given in arguments (several can be provided)\n"
" - header informations given in config file\n"
" - kernel image\n"
" - ramdisk image\n"
" - second stage image\n"
"\n"
" bootimg has to be valid Android Boot Image, or the update will abort.\n"
"\n"
" abootimg --create <bootimg> [-c \"param=value\"] [-f <bootimg.cfg>] -k <kernel> -r <ramdisk> [-s <secondstage>]\n"
"\n"
" create a new image from scratch.\n"
" if the boot image file is a block device, sanity check will be performed to avoid overwriting a existing\n"
" filesystem.\n"
"\n"
" argurments are the same than for -u.\n"
" kernel and ramdisk are mandatory.\n"
"\n"
);
}
enum command parse_args(int argc, char** argv, t_abootimg* img)
{
enum command cmd = none;
int i;
if (argc<2)
return none;
if (!strcmp(argv[1], "-h")) {
return help;
}
else if (!strcmp(argv[1], "-i")) {
cmd=info;
}
else if (!strcmp(argv[1], "-x")) {
cmd=extract;
}
else if (!strcmp(argv[1], "-u")) {
cmd=update;
}
else if (!strcmp(argv[1], "--create")) {
cmd=create;
}
else
return none;
switch(cmd) {
case none:
case help:
break;
case info:
if (argc != 3)
return none;
img->fname = argv[2];
break;
case extract:
if ((argc < 3) || (argc > 7))
return none;
img->fname = argv[2];
if (argc >= 4)
img->config_fname = argv[3];
if (argc >= 5)
img->kernel_fname = argv[4];
if (argc >= 6)
img->ramdisk_fname = argv[5];
if (argc >= 7)
img->second_fname = argv[6];
break;
case update:
case create:
if (argc < 3)
return none;
img->fname = argv[2];
img->config_fname = NULL;
img->kernel_fname = NULL;
img->ramdisk_fname = NULL;
img->second_fname = NULL;
for(i=3; i<argc; i++) {
if (!strcmp(argv[i], "-c")) {
if (++i >= argc)
return none;
unsigned len = strlen(argv[i]);
if (strlen(config_args)+len+1 >= MAX_CONF_LEN)
abort_printf("too many config parameters.\n");
strcat(config_args, argv[i]);
strcat(config_args, "\n");
}
else if (!strcmp(argv[i], "-f")) {
if (++i >= argc)
return none;
img->config_fname = argv[i];
}
else if (!strcmp(argv[i], "-k")) {
if (++i >= argc)
return none;
img->kernel_fname = argv[i];
}
else if (!strcmp(argv[i], "-r")) {
if (++i >= argc)
return none;
img->ramdisk_fname = argv[i];
}
else if (!strcmp(argv[i], "-s")) {
if (++i >= argc)
return none;
img->second_fname = argv[i];
}
else
return none;
}
break;
}
return cmd;
}
int check_boot_img_header(t_abootimg* img)
{
if (strncmp((char*)(img->header.magic), BOOT_MAGIC, BOOT_MAGIC_SIZE)) {
fprintf(stderr, "%s: no Android Magic Value\n", img->fname);
return 1;
}
if (!(img->header.kernel_size)) {
fprintf(stderr, "%s: kernel size is null\n", img->fname);
return 1;
}
if (!(img->header.ramdisk_size)) {
fprintf(stderr, "%s: ramdisk size is null\n", img->fname);
return 1;
}
unsigned page_size = img->header.page_size;
if (!page_size) {
fprintf(stderr, "%s: Image page size is null\n", img->fname);
return 1;
}
unsigned n = (img->header.kernel_size + page_size - 1) / page_size;
unsigned m = (img->header.ramdisk_size + page_size - 1) / page_size;
unsigned o = (img->header.second_size + page_size - 1) / page_size;
unsigned total_size = (1+n+m+o)*page_size;
if (total_size > img->size) {
fprintf(stderr, "%s: sizes mismatches in boot image\n", img->fname);
return 1;
}
return 0;
}
void check_if_block_device(t_abootimg* img)
{
struct stat st;
if (stat(img->fname, &st))
if (errno != ENOENT) {
printf("errno=%d\n", errno);
abort_perror(img->fname);
}
#ifdef HAS_BLKID
if (S_ISBLK(st.st_mode)) {
img->is_blkdev = 1;
char* type = blkid_get_tag_value(NULL, "TYPE", img->fname);
if (type)
abort_printf("%s: refuse to write on a valid partition type (%s)\n", img->fname, type);
int fd = open(img->fname, O_RDONLY);
if (fd == -1)
abort_perror(img->fname);
unsigned long long bsize = 0;
if (blkgetsize(fd, &bsize))
abort_perror(img->fname);
img->size = bsize;
close(fd);
}
#endif
}
void open_bootimg(t_abootimg* img, char* mode)
{
img->stream = fopen(img->fname, mode);
if (!img->stream)
abort_perror(img->fname);
}
void read_header(t_abootimg* img)
{
size_t rb = fread(&img->header, sizeof(boot_img_hdr), 1, img->stream);
if ((rb!=1) || ferror(img->stream))
abort_perror(img->fname);
else if (feof(img->stream))
abort_printf("%s: cannot read image header\n", img->fname);
struct stat s;
int fd = fileno(img->stream);
if (fstat(fd, &s))
abort_perror(img->fname);
if (S_ISBLK(s.st_mode)) {
unsigned long long bsize = 0;
if (blkgetsize(fd, &bsize))
abort_perror(img->fname);
img->size = bsize;
img->is_blkdev = 1;
}
else {
img->size = s.st_size;
img->is_blkdev = 0;
}
if (check_boot_img_header(img))
abort_printf("%s: not a valid Android Boot Image.\n", img->fname);
}
void update_header_entry(t_abootimg* img, char* cmd)
{
char *p;
char *token;
char *endtoken;
char *value;
p = strchr(cmd, '\n');
if (p)
*p = '\0';
p = cmd;
p += strspn(p, " \t");
token = p;
p += strcspn(p, " =\t");
endtoken = p;
p += strspn(p, " \t");
if (*p++ != '=')
goto err;
p += strspn(p, " \t");
value = p;
*endtoken = '\0';
unsigned valuenum = strtoul(value, NULL, 0);
if (!strcmp(token, "cmdline")) {
unsigned len = strlen(value);
if (len >= BOOT_ARGS_SIZE)
abort_printf("cmdline length (%d) is too long (max %d)", len, BOOT_ARGS_SIZE-1);
memset(img->header.cmdline, 0, BOOT_ARGS_SIZE);
strcpy((char*)(img->header.cmdline), value);
}
else if (!strncmp(token, "name", 4)) {
strncpy((char*)(img->header.name), value, BOOT_NAME_SIZE);
img->header.name[BOOT_NAME_SIZE-1] = '\0';
}
else if (!strncmp(token, "bootsize", 8)) {
if (img->is_blkdev && (img->size != valuenum))
abort_printf("%s: cannot change Boot Image size for a block device\n", img->fname);
img->size = valuenum;
}
else if (!strncmp(token, "pagesize", 8)) {
img->header.page_size = valuenum;
}
else if (!strncmp(token, "kerneladdr", 10)) {
img->header.kernel_addr = valuenum;
}
else if (!strncmp(token, "ramdiskaddr", 11)) {
img->header.ramdisk_addr = valuenum;
}
else if (!strncmp(token, "secondaddr", 10)) {
img->header.second_addr = valuenum;
}
else if (!strncmp(token, "tagsaddr", 8)) {
img->header.tags_addr = valuenum;
}
else
goto err;
return;
err:
abort_printf("%s: bad config entry\n", token);
}
void update_header(t_abootimg* img)
{
if (img->config_fname) {
FILE* config_file = fopen(img->config_fname, "r");
if (!config_file)
abort_perror(img->config_fname);
printf("reading config file %s\n", img->config_fname);
char* line = NULL;
size_t len = 0;
int read;
while ((read = getline(&line, &len, config_file)) != -1) {
update_header_entry(img, line);
free(line);
line = NULL;
}
if (ferror(config_file))
abort_perror(img->config_fname);
}
unsigned len = strlen(config_args);
if (len) {
FILE* config_file = fmemopen(config_args, len, "r");
if (!config_file)
abort_perror("-c args");
printf("reading config args\n");
char* line = NULL;
size_t len = 0;
int read;
while ((read = getline(&line, &len, config_file)) != -1) {
update_header_entry(img, line);
free(line);
line = NULL;
}
if (ferror(config_file))
abort_perror("-c args");
}
}
void update_images(t_abootimg *img)
{
unsigned page_size = img->header.page_size;
unsigned ksize = img->header.kernel_size;
unsigned rsize = img->header.ramdisk_size;
unsigned ssize = img->header.second_size;
if (!page_size)
abort_printf("%s: Image page size is null\n", img->fname);
unsigned n = (ksize + page_size - 1) / page_size;
unsigned m = (rsize + page_size - 1) / page_size;
unsigned o = (ssize + page_size - 1) / page_size;
unsigned roffset = (1+n)*page_size;
unsigned soffset = (1+n+m)*page_size;
if (img->kernel_fname) {
printf("reading kernel from %s\n", img->kernel_fname);
FILE* stream = fopen(img->kernel_fname, "r");
if (!stream)
abort_perror(img->kernel_fname);
struct stat st;
if (fstat(fileno(stream), &st))
abort_perror(img->kernel_fname);
ksize = st.st_size;
char* k = malloc(ksize);
if (!k)
abort_perror("");
size_t rb = fread(k, ksize, 1, stream);
if ((rb!=1) || ferror(stream))
abort_perror(img->kernel_fname);
else if (feof(stream))
abort_printf("%s: cannot read kernel\n", img->kernel_fname);
fclose(stream);
img->header.kernel_size = ksize;
img->kernel = k;
}
if (img->ramdisk_fname) {
printf("reading ramdisk from %s\n", img->ramdisk_fname);
FILE* stream = fopen(img->ramdisk_fname, "r");
if (!stream)
abort_perror(img->ramdisk_fname);
struct stat st;
if (fstat(fileno(stream), &st))
abort_perror(img->ramdisk_fname);
rsize = st.st_size;
char* r = malloc(rsize);
if (!r)
abort_perror("");
size_t rb = fread(r, rsize, 1, stream);
if ((rb!=1) || ferror(stream))
abort_perror(img->ramdisk_fname);
else if (feof(stream))
abort_printf("%s: cannot read ramdisk\n", img->ramdisk_fname);
fclose(stream);
img->header.ramdisk_size = rsize;
img->ramdisk = r;
}
else if (img->kernel) {
// if kernel is updated, copy the ramdisk from original image
char* r = malloc(rsize);
if (!r)
abort_perror("");
if (fseek(img->stream, roffset, SEEK_SET))
abort_perror(img->fname);
size_t rb = fread(r, rsize, 1, img->stream);
if ((rb!=1) || ferror(img->stream))
abort_perror(img->fname);
else if (feof(img->stream))
abort_printf("%s: cannot read ramdisk\n", img->fname);
img->ramdisk = r;
}
if (img->second_fname) {
printf("reading second stage from %s\n", img->second_fname);
FILE* stream = fopen(img->second_fname, "r");
if (!stream)
abort_perror(img->second_fname);
struct stat st;
if (fstat(fileno(stream), &st))
abort_perror(img->second_fname);
ssize = st.st_size;
char* s = malloc(ssize);
if (!s)
abort_perror("");
size_t rb = fread(s, ssize, 1, stream);
if ((rb!=1) || ferror(stream))
abort_perror(img->second_fname);
else if (feof(stream))
abort_printf("%s: cannot read second stage\n", img->second_fname);
fclose(stream);
img->header.second_size = ssize;
img->second = s;
}
else if (img->ramdisk && img->header.second_size) {
// if ramdisk is updated, copy the second stage from original image
char* s = malloc(ssize);
if (!s)
abort_perror("");
if (fseek(img->stream, soffset, SEEK_SET))
abort_perror(img->fname);
size_t rb = fread(s, ssize, 1, img->stream);
if ((rb!=1) || ferror(img->stream))
abort_perror(img->fname);
else if (feof(img->stream))
abort_printf("%s: cannot read second stage\n", img->fname);
img->second = s;
}
n = (img->header.kernel_size + page_size - 1) / page_size;
m = (img->header.ramdisk_size + page_size - 1) / page_size;
o = (img->header.second_size + page_size - 1) / page_size;
unsigned total_size = (1+n+m+o)*page_size;
if (!img->size)
img->size = total_size;
else if (total_size > img->size)
abort_printf("%s: updated is too big for the Boot Image (%u vs %u bytes)\n", img->fname, total_size, img->size);
}
void write_bootimg(t_abootimg* img)
{
unsigned psize;
char* padding;
printf ("Writing Boot Image %s\n", img->fname);
psize = img->header.page_size;
padding = calloc(psize, 1);
if (!padding)
abort_perror("");
unsigned n = (img->header.kernel_size + psize - 1) / psize;
unsigned m = (img->header.ramdisk_size + psize - 1) / psize;
//unsigned o = (img->header.second_size + psize - 1) / psize;
if (fseek(img->stream, 0, SEEK_SET))
abort_perror(img->fname);
fwrite(&img->header, sizeof(img->header), 1, img->stream);
if (ferror(img->stream))
abort_perror(img->fname);
fwrite(padding, psize - sizeof(img->header), 1, img->stream);
if (ferror(img->stream))
abort_perror(img->fname);
if (img->kernel) {
fwrite(img->kernel, img->header.kernel_size, 1, img->stream);
if (ferror(img->stream))
abort_perror(img->fname);
fwrite(padding, psize - (img->header.kernel_size % psize), 1, img->stream);
if (ferror(img->stream))
abort_perror(img->fname);
}
if (img->ramdisk) {
if (fseek(img->stream, (1+n)*psize, SEEK_SET))
abort_perror(img->fname);
fwrite(img->ramdisk, img->header.ramdisk_size, 1, img->stream);
if (ferror(img->stream))
abort_perror(img->fname);
fwrite(padding, psize - (img->header.ramdisk_size % psize), 1, img->stream);
if (ferror(img->stream))
abort_perror(img->fname);
}
if (img->header.second_size) {
if (fseek(img->stream, (1+n+m)*psize, SEEK_SET))
abort_perror(img->fname);
fwrite(img->second, img->header.second_size, 1, img->stream);
if (ferror(img->stream))
abort_perror(img->fname);
fwrite(padding, psize - (img->header.second_size % psize), 1, img->stream);
if (ferror(img->stream))
abort_perror(img->fname);
}
ftruncate (fileno(img->stream), img->size);
free(padding);
}
void print_bootimg_info(t_abootimg* img)
{
printf ("\nAndroid Boot Image Info:\n\n");
printf ("* file name = %s %s\n\n", img->fname, img->is_blkdev ? "[block device]":"");
printf ("* image size = %u bytes (%.2f MB)\n", img->size, (double)img->size/0x100000);
printf (" page size = %u bytes\n\n", img->header.page_size);
printf ("* Boot Name = \"%s\"\n\n", img->header.name);
unsigned kernel_size = img->header.kernel_size;
unsigned ramdisk_size = img->header.ramdisk_size;
unsigned second_size = img->header.second_size;
printf ("* kernel size = %u bytes (%.2f MB)\n", kernel_size, (double)kernel_size/0x100000);
printf (" ramdisk size = %u bytes (%.2f MB)\n", ramdisk_size, (double)ramdisk_size/0x100000);
if (second_size)
printf (" second stage size = %u bytes (%.2f MB)\n", ramdisk_size, (double)ramdisk_size/0x100000);
printf ("\n* load addresses:\n");
printf (" kernel: 0x%08x\n", img->header.kernel_addr);
printf (" ramdisk: 0x%08x\n", img->header.ramdisk_addr);
if (second_size)
printf (" second stage: 0x%08x\n", img->header.second_addr);
printf (" tags: 0x%08x\n\n", img->header.tags_addr);
if (img->header.cmdline[0])
printf ("* cmdline = %s\n\n", img->header.cmdline);
else
printf ("* empty cmdline\n");
printf ("* id = ");
int i;
for (i=0; i<8; i++)
printf ("0x%08x ", img->header.id[i]);
printf ("\n\n");
}
void write_bootimg_config(t_abootimg* img)
{
printf ("writing boot image config in %s\n", img->config_fname);
FILE* config_file = fopen(img->config_fname, "w");
if (!config_file)
abort_perror(img->config_fname);
fprintf(config_file, "bootsize = 0x%x\n", img->size);
fprintf(config_file, "pagesize = 0x%x\n", img->header.page_size);
fprintf(config_file, "kerneladdr = 0x%x\n", img->header.kernel_addr);
fprintf(config_file, "ramdiskaddr = 0x%x\n", img->header.ramdisk_addr);
fprintf(config_file, "secondaddr = 0x%x\n", img->header.second_addr);
fprintf(config_file, "tagsaddr = 0x%x\n", img->header.tags_addr);
fprintf(config_file, "name = %s\n", img->header.name);
fprintf(config_file, "cmdline = %s\n", img->header.cmdline);
fclose(config_file);
}
void extract_kernel(t_abootimg* img)
{
unsigned psize = img->header.page_size;
unsigned ksize = img->header.kernel_size;
printf ("extracting kernel in %s\n", img->kernel_fname);
void* k = malloc(ksize);
if (!k)
abort_perror(NULL);
if (fseek(img->stream, psize, SEEK_SET))
abort_perror(img->fname);
size_t rb = fread(k, ksize, 1, img->stream);
if ((rb!=1) || ferror(img->stream))
abort_perror(img->fname);
FILE* kernel_file = fopen(img->kernel_fname, "w");
if (!kernel_file)
abort_perror(img->kernel_fname);
fwrite(k, ksize, 1, kernel_file);
if (ferror(kernel_file))
abort_perror(img->kernel_fname);
fclose(kernel_file);
free(k);
}
void extract_ramdisk(t_abootimg* img)
{
unsigned psize = img->header.page_size;
unsigned ksize = img->header.kernel_size;
unsigned rsize = img->header.ramdisk_size;
unsigned n = (ksize + psize - 1) / psize;
unsigned roffset = (1+n)*psize;
printf ("extracting ramdisk in %s\n", img->ramdisk_fname);
void* r = malloc(rsize);
if (!r)
abort_perror(NULL);
if (fseek(img->stream, roffset, SEEK_SET))
abort_perror(img->fname);
size_t rb = fread(r, rsize, 1, img->stream);
if ((rb!=1) || ferror(img->stream))
abort_perror(img->fname);
FILE* ramdisk_file = fopen(img->ramdisk_fname, "w");
if (!ramdisk_file)
abort_perror(img->ramdisk_fname);
fwrite(r, rsize, 1, ramdisk_file);
if (ferror(ramdisk_file))
abort_perror(img->ramdisk_fname);
fclose(ramdisk_file);
free(r);
}
void extract_second(t_abootimg* img)
{
unsigned psize = img->header.page_size;
unsigned ksize = img->header.kernel_size;
unsigned rsize = img->header.ramdisk_size;
unsigned ssize = img->header.second_size;
if (!ssize) // Second Stage not present
return;
unsigned n = (rsize + ksize + psize - 1) / psize;
unsigned soffset = (1+n)*psize;
printf ("extracting second stage image in %s\n", img->second_fname);
void* s = malloc(ksize);
if (!s)
abort_perror(NULL);
if (fseek(img->stream, soffset, SEEK_SET))
abort_perror(img->fname);
size_t rb = fread(s, ssize, 1, img->stream);
if ((rb!=1) || ferror(img->stream))
abort_perror(img->fname);
FILE* second_file = fopen(img->second_fname, "w");
if (!second_file)
abort_perror(img->second_fname);
fwrite(s, ssize, 1, second_file);
if (ferror(second_file))
abort_perror(img->second_fname);
fclose(second_file);
free(s);
}
t_abootimg* new_bootimg()
{
t_abootimg* img;
img = calloc(sizeof(t_abootimg), 1);
if (!img)
abort_perror(NULL);
img->config_fname = "bootimg.cfg";
img->kernel_fname = "zImage";
img->ramdisk_fname = "initrd.img";
img->second_fname = "stage2.img";
memcpy(img->header.magic, BOOT_MAGIC, BOOT_MAGIC_SIZE);
img->header.page_size = 2048; // a sensible default page size
return img;
}
int main(int argc, char** argv)
{
t_abootimg* bootimg = new_bootimg();
switch(parse_args(argc, argv, bootimg))
{
case none:
printf("error - bad arguments\n\n");
print_usage();
break;
case help:
print_usage();
break;
case info:
open_bootimg(bootimg, "r");
read_header(bootimg);
print_bootimg_info(bootimg);
break;
case extract:
open_bootimg(bootimg, "r");
read_header(bootimg);
write_bootimg_config(bootimg);
extract_kernel(bootimg);
extract_ramdisk(bootimg);
extract_second(bootimg);
break;
case update:
open_bootimg(bootimg, "r+");
read_header(bootimg);
update_header(bootimg);
update_images(bootimg);
write_bootimg(bootimg);
break;
case create:
if (!bootimg->kernel_fname || !bootimg->ramdisk_fname) {
print_usage();
break;
}
check_if_block_device(bootimg);
open_bootimg(bootimg, "w");
update_header(bootimg);
update_images(bootimg);
if (check_boot_img_header(bootimg))
abort_printf("%s: Sanity cheks failed", bootimg->fname);
write_bootimg(bootimg);
break;
}
return 0;
}

97
src/abootimg/headers/bootimg.h
Unescape Escape View File

@ -1,97 +0,0 @@
/* tools/mkbootimg/bootimg.h
**
** Copyright 2007, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#ifndef _BOOT_IMAGE_H_
#define _BOOT_IMAGE_H_
typedef struct boot_img_hdr boot_img_hdr;
#define BOOT_MAGIC "ANDROID!"
#define BOOT_MAGIC_SIZE 8
#define BOOT_NAME_SIZE 16
#define BOOT_ARGS_SIZE 512
struct boot_img_hdr
{
unsigned char magic[BOOT_MAGIC_SIZE];
unsigned kernel_size; /* size in bytes */
unsigned kernel_addr; /* physical load addr */
unsigned ramdisk_size; /* size in bytes */
unsigned ramdisk_addr; /* physical load addr */
unsigned second_size; /* size in bytes */
unsigned second_addr; /* physical load addr */
unsigned tags_addr; /* physical addr for kernel tags */
unsigned page_size; /* flash page size we assume */
unsigned unused[2]; /* future expansion: should be 0 */
unsigned char name[BOOT_NAME_SIZE]; /* asciiz product name */
unsigned char cmdline[BOOT_ARGS_SIZE];
unsigned id[8]; /* timestamp / checksum / sha1 / etc */
};
/*
** +-----------------+
** | boot header | 1 page
** +-----------------+
** | kernel | n pages
** +-----------------+
** | ramdisk | m pages
** +-----------------+
** | second stage | o pages
** +-----------------+
**
** n = (kernel_size + page_size - 1) / page_size
** m = (ramdisk_size + page_size - 1) / page_size
** o = (second_size + page_size - 1) / page_size
**
** 0. all entities are page_size aligned in flash
** 1. kernel and ramdisk are required (size != 0)
** 2. second is optional (second_size == 0 -> no second)
** 3. load each element (kernel, ramdisk, second) at
** the specified physical address (kernel_addr, etc)
** 4. prepare tags at tag_addr. kernel_args[] is
** appended to the kernel commandline in the tags.
** 5. r0 = 0, r1 = MACHINE_TYPE, r2 = tags_addr
** 6. if second_size != 0: jump to second_addr
** else: jump to kernel_addr
*/
#if 0
typedef struct ptentry ptentry;
struct ptentry {
char name[16]; /* asciiz partition name */
unsigned start; /* starting block number */
unsigned length; /* length in blocks */
unsigned flags; /* set to zero */
};
/* MSM Partition Table ATAG
**
** length: 2 + 7 * n
** atag: 0x4d534d70
** <ptentry> x n
*/
#endif
#endif

2
src/abootimg/headers/version.h
Unescape Escape View File

@ -1,2 +0,0 @@
//https://gitorious.org/ac100/abootimg
#define VERSION_STR "gitorious-7e127fee6a3981f6b0a50ce9910267cd501e09d4"
Write Preview
Loading…
Cancel
Save