[Q] How to pull ramdisk.img from xperia play? - Xperia Play Q&A, Help & Troubleshooting

ive been goggling all day with no luck, to a experienced dev in the business of making kernels i bet this is a easy one but how can i extract my ramdisk from xperia play (Preferable in windows)? I hear something about Boot.img so i pulled that out via ADB but i also read that theres a zimage or something where exactly is this file?
im really trying to avoid linux

First, that "boot.img" is kernel+ramdisk inside one file.
I use Android Image Kitchen
http://forum.xda-developers.com/showthread.php?t=2073775
for windows to unpack boot.img
You'll get ramdisk and zimage from it.
Make your changes to ramdisk and repack.
Keep in mind that sometimes ramdisk is packed (it is because there are multiple ramdisks in kernel - for normal boot and for recovery(s))
It can be confusing because it's packed ramdisk files inside cpio packed file inside img packed file...
I don't know exact command how to extract boot.img from phone itself, it is done from adb shell, something like
dd /dev/block/mtdblock3 > /sdcard/Boot.img
Also, as you, i am windows user, but some things can only be donne in linux (like compiling kernel), but somehow i managed to install ubuntu13.04 in virtualbox (it took me two weeks to set it up for compiling). It can be pain in the a$$ to set it up and i needed to install teamviewer to access files inside it, but once it's done, all i do is copy paste commands in terminal window...
Sent from my C6502 using XDA Free mobile app

Ok ill take a look at that thanks.
R800Q

Related

Messing about with fastboot on the HTC Hero Orange UK

Hi, since this is my wife's HTC hero from Orange UK, I'm being particularly careful with it. I'm new to xda-developers/HTC platforms (but not new to doing horrible things to embedded platforms) :>
I've been messing about with the phone all evening - downloaded that ROM image from the other thread and pulled it apart to look at the OS files etc - the standard break-a-new-embedded-linux-platform routine.
Anyway, if you hold down BACK when powering on, it enters the bootloader mode with a "FASTBOOT USB" prompt, which sounded interesting. I got a copy of the fastboot binary, and extracted the kernel and the ramdisk images from "boot.img" in the "HEROIMG_Hero_HTC_WWE_1.76.405.1_R3_WWE_release_signed.zip" (using split_bootimg.pl).
Just as a quick test, I tried booting them with:
fastboot boot kernel.img boot.img
since the above just boots a kernel from RAM, and not actually flash it. Anyway, fastboot claims it downloaded and booted it ok, and the phone shows the "HERO" logo. Unfortunately that is as far as it gets. However, if I reset the phone, it boots perfectly fine from the kernel/ramdisk in flash (phew!)
Since it doesn't actually boot into android proper (and doesn't show up as a USB device), I don't know if (a) its showing the HERO logo, but failing the signature check, or (b) actually booting, but crashing 'cos the kernel/ramdisk aren't quite right. I'd guess (a) myself, but I'm new to messing with HTC bootloaders.
Anyway, in case they're useful, the details of the phone from the fastboot mode are:
HERO CVT SHIP S-ON
HBOOT-1.76.0004 (HERO10000)
MICROP-010f
TOUCH PANEL-SYN0104
RADIO-6.35.04.25
Jul 3 2009,15:22:21
That method of entering fastboot is the same as the magic. Check the magic / sapphire wiki and have a read as I suspect the magic is its closest relative and a lot of the magic stuff will work...
daisy xx
Aha, thank you very much, that gives me more information!
Anyway, I just tried booting the boot.img itself instead of splitting it up with:
fastboot boot boot.img
This time, it booted right into the full android! Checking /proc/config.gz:
On the phone booting normally, it says:
# Linux kernel version: 2.6.27
# Fri Jul 3 07:52:06 2009
On the phone booted with boot.img extracted from that zip, it starts:
# Linux kernel version: 2.6.27
# Thu Jun 25 14:16:01 2009
So it seems as though it can boot the boot.img: AFAIK config.gz is hardcoded into the kernel binary. Now: is there a signature in the boot.img file?
Erm, I'm either hallucinating from lack of sleep, or I appear to have a root shell on it now. e.g. I can see the contents of /data from "adb shell":
ps reports: [snip]
root 43 1 3332 164 ffffffff 0000e8f4 S /sbin/adbd
root 619 43 748 340 c005ef5c afe0d08c S /system/bin/sh
# ls /data/app
org.oep.pong.apk
com.google.android.stardroid.apk
se.illusionlabs.labyrinth.lite.apk
com.google.zxing.client.android.apk
com.innovativelanguage.wordpowerlite.jp.apk
com.funambol.android.apk
com.massorbit.sword.apk
com.soundroid2012.piano.apk
jg.entertainment.abook.four.apk
com.maplekeycompany.apps.shake.apk
net.peterd.zombierun.apk
All I did was
1) pull the boot.img apart with split_bootimg
2) gunzip the ramdisk
3) hexedit the ramdisk to set ro.secure=0 (couldn't be bothered faffing about with cpio)
4) gzip the ramdisk
5) rebuild the image with mkbootimg. Oh you need to specify a different base address. Example command line:
/tmp/mkbootimg --kernel boot.img-kernel --ramdisk boot.img-ramdisk.insecure.gz --cmdline 'no_console_suspend=1 console=null' -o test-insecure.img --base 0x19200000
Then I just booted it with "fastboot boot test-insecure.img"
adq said:
Erm, I'm either hallucinating from lack of sleep, or I appear to have a root shell on it now. e.g. I can see the contents of /data from "adb shell":
ps reports: [snip]
root 43 1 3332 164 ffffffff 0000e8f4 S /sbin/adbd
root 619 43 748 340 c005ef5c afe0d08c S /system/bin/sh
# ls /data/app
org.oep.pong.apk
com.google.android.stardroid.apk
se.illusionlabs.labyrinth.lite.apk
com.google.zxing.client.android.apk
com.innovativelanguage.wordpowerlite.jp.apk
com.funambol.android.apk
com.massorbit.sword.apk
com.soundroid2012.piano.apk
jg.entertainment.abook.four.apk
com.maplekeycompany.apps.shake.apk
net.peterd.zombierun.apk
All I did was
1) pull the boot.img apart with split_bootimg
2) gunzip the ramdisk
3) hexedit the ramdisk to set ro.secure=0 (couldn't be bothered faffing about with cpio)
4) gzip the ramdisk
5) rebuild the image with mkbootimg. Oh you need to specify a different base address. Example command line:
/tmp/mkbootimg --kernel boot.img-kernel --ramdisk boot.img-ramdisk.insecure.gz --cmdline 'no_console_suspend=1 console=null' -o test-insecure.img --base 0x19200000
Then I just booted it with "fastboot boot test-insecure.img"
Click to expand...
Click to collapse
You're ready to build your own rom images ;-)
You could start by preparing your own rooted recovery with nandroid.
For a quick and dirty basic recovery image, just download one from sapphire development forum, replace the boot.img-kernel with a working copy for your hero.
Then rename init.sapphire.rc in init.hero.rc in ramdisk image.
You can simply extract ramdisk image with:
mkdir boot.img-ramdisk
cd boot.img-ramdisk
zcat ../boot.img-ramdisk.gz | cpio -idv
make your changes to ramdisk files
search internet for a script named repack-bootimg.pl
add the new base parameter to mkbootimg line in the script
cd to directory where you unpacked your boot.img
repack-bootimg.pl boot.img-kernel boot.img-ramdisk newboot.img
fastboot your recovery
then you can use nandroid in the recovery image to make a full dump of your rom and use the newer version of boot.img you have in your device to rebuild an up-to-date recovery or any kind of rom (you could start by preparing a copy of your original rom by changing ro.secure=0 in both boot.img and recovery.img).
By the way, I noticed that kernel in HERO uses sapphire fixup. The currently available version on the net is not booting on sapphire (magic) 32A, but it resets after a few minutes.
Maybe the kernel version in your orange hero introduces compatibility with sapphire boards. Well, really I suppose it won't, but if you get a nandrod backup and post your current original boot.img, magic 32A board owners could give it a try while we are waiting for HTC to release updated kernel sources for Magic and Hero.
Bye
daldroid
adq said:
[...]
So it seems as though it can boot the boot.img: AFAIK config.gz is hardcoded into the kernel binary. Now: is there a signature in the boot.img file?
Click to expand...
Click to collapse
No, no signature in standard boot.img, you have to zip it and sign the resulting zip. But no signing keys except for test-keys are available to the public, so I suppose your spl (S-ON) wil not allow you to directly flash rom images from fastboot command line.
However it seems your SPL allows you to fastboot a repacked boot image, so it should not be a problem to use a recovery image to flash whichever rom mod you like.
I suggest you not to flash any SPL you can find on the net, I suppose you have the newest ad no image of your original SPL is available (there is one from a leaked hero image, but yours seems to be newer)
Bye
Yeah, my thoughts exactly, I'd rather not flash the SPL if I can help it: I don't fancy explaining to my wife why I have to rip her phone apart to find the JTAG contacts I'll upload the boot.img later though.
Thats odd about the reset after a few minutes thing: hardware watchdog timer of some sort?
adq said:
Yeah, my thoughts exactly, I'd rather not flash the SPL if I can help it: I don't fancy explaining to my wife why I have to rip her phone apart to find the JTAG contacts I'll upload the boot.img later though.
Thats odd about the reset after a few minutes thing: hardware watchdog timer of some sort?
Click to expand...
Click to collapse
Well, really it's a little bit mor than a minute or so.
I suppose it's not an hardware watchdog, I don't have access to console debug messages.
Really the reset is a good sign, if you try booting dream or sapphire 32b kernel on 32A boards, it hangs forever.
If you extract piggy.gz from the kernel and hexedit it,you can find hero kerel initializes the hardware using the sapphire fixup.
It could only be that htc reused the same source and fixed hardware details and forgot to change the fixup routine name or that they are prepare to build a kernel able to boot on both hero and magic 32A boards.
32A and hero use the same new base address for kernel and ramdisk loading 0x19200000.
our boards have more memory than dream and 32b boards.
I suspect htc is using a stacked ram configuration and they changed the init code for the number of banks in memory.
In 32A they changed ram location for fb, ram console and maybe gpu1. It was a real mess to guess every change, so I stopped recompiling and rebooting the kernel after a dozen of times ;-) Waiting for htc to release the patched source code ;-)
The radio rom on hero seems to be is newer than 32a's latest available but I don't want to try a flash, you know what I mean ;-)
The available hero SPL shoud work on sapphire (and on blackstone and topaz too) and maybe the newer radio rom requires it, but... I prefer not to brick my Magic.
Have a nice rom rooting time. You could want to give superuser.apk a try.
People on this forum is asking for rooting status on hero, I suppose you'll be able to announce them your succes in a short time.
Wow! That was Fast! Lol..... even thought there is still some work to do.
i feel honoured to have been one of the first to read this i still dont have a hero yet =[ gotta wait till august when i get my ema might start scrounging and saving what i can get so i can get it sooner
Well done to you sir what a fine job uve done, gz =]
I'm waiting for my Hero as well and I'm completely new to android.
But like you I develop for and work with embedded Linux systems so tearing ROMs apart was pretty much on top of my list when my device should arrive .
I don't know what the 'recovery' image does on Android systems, but as I read it like this: You can temporary boot a rom (or at least a kernel and it will get the rest of the system from the rom area) through the fastboot method.
So yes, then you have temporary booted into a rooted ROM. But how to make it permanent? Because if you modify the ROM and flash it back it will probably not work because it detects its modified, right?
Trying to make a "dirty recovery image" to dump full roms using Nandroid Backup
Hello Dalroid,
I read your post and was able to do the following:
1. Using split_bootimg, extract the ramdisk files from the Stock HTC HERO Rom found in the XDA forums.
2. I downloaded the cm-recovery 1.4 image from Sapphire and used split_bootimg on it as well.
3. I copied the extracted kernel from the HTC Hero ROM and replaced the one from the cm-recovery of sapphire.
4. I renamed init.sapphire.rc to init.hero.rc in the extracted recovery image folder.
5. This is where i have trouble. I am using the repack-bootimg.pl, but I am unable to repackage the image.
I did note that you stated that some base parameters needed to be changed in the script for this to work. Could you please shed some light on what I need completed in order to repackage. Thank you in advance.
EDIT: I found one problem so far, I do not have mkbootimg or mkbootfs on my computer. How do I get these on my computer?
JWallstreet said:
Hello Dalroid,
I read your post and was able to do the following:
1. Using split_bootimg, extract the ramdisk files from the Stock HTC HERO Rom found in the XDA forums.
2. I downloaded the cm-recovery 1.4 image from Sapphire and used split_bootimg on it as well.
3. I copied the extracted kernel from the HTC Hero ROM and replaced the one from the cm-recovery of sapphire.
4. I renamed init.sapphire.rc to init.hero.rc in the extracted recovery image folder.
5. This is where i have trouble. I am using the repack-bootimg.pl, but I am unable to repackage the image.
I did note that you stated that some base parameters needed to be changed in the script for this to work. Could you please shed some light on what I need completed in order to repackage. Thank you in advance.
EDIT: I found one problem so far, I do not have mkbootimg or mkbootfs on my computer. How do I get these on my computer?
Click to expand...
Click to collapse
I built my mkbootimg from android source code (android.git.kernel.org), but if you prefer you can find a prebuilt binary from http://rapidshare.com/files/249629878/PortTools.rar. I'm not the author neither I tested it, just searched for mkbootimg in forums and pasted the link for you.
If you use the standard mkbootimg, just add --base 0x19200000 the the mkbootimg line, otherwise the boot.img will be generated with standard load address which won't work for hero (or for my 32A Magic).
This is pretty exciting stuff
I really want to remove the SIM lock from the Hero - is this something you can do now you've got su access?
Is it going to be possible to have a 'how to' guide for the Hero to tell us what to do to get the phone unlocked?
I want to see someone install the Magic image on the Hero - it should fly with the extra RAM
Just out of curiosity, what would happen if I booted the original cm-recovery-1.4.img on the Hero?
My phone will hopefully arrive tomorrow, and the first thing I'd like to do is create a backup with the nandroid script.
wossName said:
Just out of curiosity, what would happen if I booted the original cm-recovery-1.4.img on the Hero?
My phone will hopefully arrive tomorrow, and the first thing I'd like to do is create a backup with the nandroid script.
Click to expand...
Click to collapse
It wont boot. You can instead use the modified(only trackball press event and kernel) cyanogen's recovery here: http://forum.xda-developers.com/showthread.php?t=541807&page=2
enlightener said:
It wont boot. You can instead use the modified cyanogen's recovery here: http://forum.xda-developers.com/showthread.php?t=541807&page=2
Click to expand...
Click to collapse
I'm new to all this, so I'd be grateful for some more information: is the Dream and Hero hardware too different to boot the same image? Or would it be possible to create multi-platform images?
I already downloaded the modified image from that thread and have extracted the same kernel, so I should be all set.

[How to] Rom cooking

Original post:
Hello,
I am new to android but not to linux. I used to tweak my winmo phone rom.
I have backed up my device with nandroid. I just need some explanations:
- why isn't the radio extracted?
- how can I "extract" does .img files to modify and then rebuild them?
I found some informations of what the .img files contain here: ROM Partitions it should be the same for Hero
I have found some informations on how to push updates to the rom by looking at modaco updates. It seems quite simple to delete/copy files on the hero rom using an update-sript file. I am however curious about the RSA cert and if some files need to be signed.
Any information welcomed.
Regards
Click to expand...
Click to collapse
How to
Extract NAND image files
To extract .img files, I have found unyaffs from http://code.google.com/p/unyaffs/ I have compiled it under ubuntu 64 (attached). Unyaffs works on system.img but on no other .img file
To extract boot.img use attached extract-kernel.pl and extract-ramdisk.pl
# extract-kernel.pl boot.img
# extract-ramdisk.pl boot.img
Should work for recovery.img but haven't tried as custom recovery images on the forum are great.
Rebuild system.img
Seems you just need "to loopback mount an image on your linux box and format it with YAFFS".
But it is useless as because Hero's SPL does not allow flashing system.img directly. You should use an update.zip package for that. (read below)
Rebuild boot.img
After extracting your boot.img using attached extract-*.pl and tweaking it, in same folder run:
# mkbootfs boot.img-ramdisk | gzip > ramdisk-boot
# mkbootimg --kernel boot.img-kernel --ramdisk ramdisk-boot --cmdline "no_console_suspend=1 console=null" -o newBoot.img --base 0x19200000
Creating an update.zip package
Creating an update.zip package is quite easy in fact. For example, to add a (valid) test.apk package to your rom:
- create an empty folder <workdir>
- create folder structure for test.apk (<workdir>/system/app) and copy the test.apk
- create folder structure for update-script (<workdir>/META-INF/com/google/android)
- edit <workdir>/META-INF/com/google/android/update-script
- put in it:
Code:
show_progress 0.1 0
copy_dir PACKAGE:system SYSTEM:
set_perm_recursive 0 0 0755 0644 SYSTEM:app
show_progress 0.1 10
- compress the <workdir> content to zip (not the <workdir> folder itself)
Now you are going to sign the zip file. Download attached testsign.zip and copy it in your <SDK>/tools folder. Extract it here. It should create a sign subfolder with a testsign.jar file in it.
Then, from <workdir> folder, do:
java -classpath <SDK>/tools/sign/testsign.jar" testsign file.zip file-signed.zip
Ok, now your zip file is ready to be deployed using cyanogen recovery image.
To find more command to use in update-script, look at other's.
Modify .apk package
Seems it is easy to uncompress an .apk package (zip) an to modify files in it and then compress it. But after all: you must sign it like update.zip packages.
ODEX files
- What are those Odex files? Answer.
- How to get rid of them?
Odex files depend on framework they are made for. To deodex an odex file use that how to
Then you may create a classes.dex file by executing the smali program on the "out" folder. You then rename it to classes.dex and add it to the .apk.
- How to create them?
Use dexopt-wrapper on device.
Porting an other device's rom
Well, that part is easy
- extract the system.img
- extract boot.img
- replace boot.img-kernel with the one from your stock Hero rom one.
- rebuild boot.img
- build update.zip package (look someone's hero custom rom to see how to do it)
- sign and flash
It should run place and make calls but probably won't have Wifi, BT, trackball support. If you make those work: tell me, but I think we should wait to be able to compile a 2.6.29 kernel to have those.
Tools
Androsign script (linux)
I wrote that androsign script to quick sign zip files. Just put it in your <SDK>/tools folder, then chmod +x. If you have put the tools folder in your PATH, you can call it directly like this:
androsign /dev/folder1/folder2/update.zip (or any zip/apk file)
It will output an update-signed.zip (or app-signed.apk etc) in the same folder than original file was in.
Notes
Note1: thanks
Thanks to every guy that helped me found all that.
Note1: sharing
I searched for hours, so I am more than happy to share it to save someone's time. I am just disappointed than some people here do not have that spirit: I could have use those hours for development instead of research...
Note3: corrections
So, if you found anything incorrect, would like to supply more informations or want to correct my bad english: just PM me.
To find
- how to dump radio from device
- how to build a custom hero kernel (waiting for HTC sources)
To come
How to prepare your own kitchen and useful scripts (linux)
gecka said:
I am new to android but not to linux.
Click to expand...
Click to collapse
Same here. I do lots of tweeking on my linux machine, so i know quite a lot of linux. If there would be anyone to answer those questions by gecka, I might start tweeking the rom (maybe someday cook one up)
Best regards
Hello,
First post edited, but still some ignorances... Please share if you know anything.
Best regards
unpack and pack boot.img and recovery.img
First you need utilities such as mkbootfs and mkbootimg. maybe you can find them online (i can upload them later compiled for linux x86-64) but i suggest you download android source (http://source.android.com) and do a generic make. In this way you have these and other utilities(tools to pack system.img too, but if you haven't an engineering bootloader you can't flash it directly) in /out/host/... (it's better if you add this in your PATH)
To unpack and pack boot and recovery, read here:
http://forum.xda-developers.com/showthread.php?t=443994
or here:
http://android-dls.com/wiki/index.php?title=HOWTO:_Unpack,_Edit,_and_Re-Pack_Boot_Images
...or...
(I have attached extract-kernel and extract-ramdisk scripts from JF build environment) :
to unpack (boot.img or recovery.img, i'm writing the commands with boot.img):
Code:
extract-kernel boot.img
extract-ramdisk boot.img
at this point you have
boot.img-kernel
boot.img-ramdisk
to repack (boot.img or recovery.img):
For hero you need to specify the base address because it's different (0x19200000). For more information: http://forum.xda-developers.com/showthread.php?t=541522.
Code:
mkbootfs boot.img-ramdisk | gzip > ramdisk-boot
mkbootimg --kernel boot.img-kernel --ramdisk ramdisk-boot --cmdline "no_console_suspend=1 console=null" -o newBoot.img --base 0x19200000
Useful resources for android modding are the dream forums (most of the concepts/hacks works for hero too):
http://forum.xda-developers.com/forumdisplay.php?f=448
(informative thread here: http://forum.xda-developers.com/showthread.php?t=519523)
note: mkbootimg with --base support is in donut and master (or find the patch on gerrit and apply it to cupcake)
First of all, the reason you cant unyaffs anything other than system.img is because they aren't YAFFS images. boot/recovery is kernel+initrd like in any normal linux bootimage scenario (see more below).
Tofind
- how to dump radio from device
Click to expand...
Click to collapse
Haven't gotten into that myself yet, but I know modaco posted an update.zip with radio image included on this very forum. Look for it.
- how to extract NAND images other than system.img
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=443994
- rebuild NAND images such as system.img
Click to expand...
Click to collapse
This isn't hard, just loopback mount an image on your linux box and format it with YAFFS.
Building a custom kernel and recovery binary
HTC hasn't yet released the changes they have made to the hero/dream/magic kernels, 32A board, so you can't just compile a kernel from the AOSP. I haven't tried it yet but this patch might work on hero too:
http://forum.xda-developers.com/showthread.php?t=548061
EDIT: HTC Sources for dream and magic at http://developer.htc.com
For building a custom recovery, it's better if you use cyanogen's recovery code, found in his git : github.com/cyanogen, because it already has menus for nandroid and other tools, but you can use the recovery code from AOSP too (cyanogen's one is a patched version with a lot more features, http://forum.xda-developers.com/showthread.php?t=523558). To make a custom recovery you need to change the recovery binary (because the press event of the hero trackball has a different keycode, 191), the kernel and the init scripts. Actually i don't remember what else I've changed to make cm's recovery working with hero (the recovery that we are actually using here), I'm at work now, but i'll check later and post more details, or you can just unpack the recovery and see the changes .
First post updated.
Nandroid only backs up the partitions in the main storage nand, but radio and spl are flashed to the radio's own nand flash. Whether it's possible to dump it or not I don't know, but honestly, I don't see why you'd want to. Radio images are available through RUU's and I don't think editing would be an easy task
jubeh said:
Nandroid only backs up the partitions in the main storage nand, but radio and spl are flashed to the radio's own nand flash. Whether it's possible to dump it or not I don't know, but honestly, I don't see why you'd want to. Radio images are available through RUU's and I don't think editing would be an easy task
Click to expand...
Click to collapse
Sometimes, new radio images appear on new phones. That is why I am looking on a way to extract it.
very useful thread.
Very nice tutorial, thank you!
could you please specify a bit more on how to clone from android's git and then build the mkbootimg and mkbootfs (just make, right)? I tried and I keep getting a "fatal:server dumped connection" error
Are we able to modify an official ROM (also for hero). Which shows up in RUU as INFOsignature checking... failed. Am I able to change the kernel and make it work?
jubeh said:
could you please specify a bit more on how to clone from android's git and then build the mkbootimg and mkbootfs (just make, right)? I tried and I keep getting a "fatal:server dumped connection" error
Click to expand...
Click to collapse
What command do you use?
In fact i won't be able to explain you better than that page: http://source.android.com/download
Following that how to, you'll be able to sync an android branch You can learn more about git, branches and more here (Repo and Git resources)
The sync is long (2.9Go). Then, to build mkbootimg and mkbootfs, you should do a generic build of android going to source folder and issuing the 'make' command.
All that will be part of my upcoming "How to prepare your own kitchen and useful scripts".
awsy44 said:
Are we able to modify an official ROM (also for hero). Which shows up in RUU as INFOsignature checking... failed. Am I able to change the kernel and make it work?
Click to expand...
Click to collapse
Well, to grep the system from a windows RUU exe file you should launch it and then look in your user temporary folder for a rom.zip file in a {uid} subfolder. It contains the system and boot img files.
You then need to make an update.zip package from them. Have a look to someone's hero custom rom and to it's update-script to see how it is achieved. My 'How to' gives you all you need to understand update.zip packages and to extract system.img.
If you are porting a Hero rom, no need to change the kernel.
Regards
Well, to grep the system from a windows RUU exe file you should launch it and then look in your user temporary folder for a rom.zip file in a {uid} subfolder. It contains the system and boot img files.
You then need to make an update.zip package from them. Have a look to someone's hero custom rom and to it's update-script to see how it is achieved. My 'How to' gives you all you need to understand update.zip packages and to extract system.img.
If you are porting a Hero rom, no need to change the kernel.
Regards
Click to expand...
Click to collapse
Thanks so much for this amazing information, however how do i stop getting hit with the infosignature failed error? is that the kernel or the hboot? it says 12 signature verify error.
Oh, I do have the source and I am running my own donut build on my dream with some of my spice, but the problem I was having was cloning that exact project (mkbootimg) from android.git.kernel.org using git, but when I read what you said, I remembered that when you make the build, it also compiles several tools and i overlooked checking the out folder for it, kind of dumb on my part since I had already pulled the fastboot tool from that build and added it to my own bin, i guess mkbootimg and mkbootfs should be there too, right?
i tried running androsign and got this error
Code:
[email protected]:~/android/dev/sdk/tools$ ./androsign META-INF.zip
Exception in thread "main" java.lang.NoClassDefFoundError: testsign
Failed!
[email protected]:~/android/dev/sdk/tools$
if i use a ROM of one device on an other different device, I think I must build a kernel on my own, is that correct?
but what config should I use? a config from my current running ROM? then I think I must make it suitable for new ROM, what options should I care about?
for example, if I want to run a AOSP 2.01 ROM ( system.img) on a Magic 32A device with SPL 1.76, and now I am running a SenseUI ROM which kernel is 2.6.27, I think I should build a 2.6.29 kernel from the git tree, and ensure it will work with camera/bt/wifi/trackball of my device properly first .
how can I make this step successful?
other hand, the dynamic lib files(.so) with the system.img can be incorrect. so, I may need to build them too for pairing with the kernel I built in previous step. I think applications will work properly because they only care about if the interfaces of kernel and lib is correct. for that, also there some config job (like build.prop, etc) to do, is there a list of all of these jobs? and what values can I refer to? the original ROM (Magic 32A SPL 1.76 working ROM here) ?
am I right? what should i do and what are in those steps? are there some doucments I can read from?
Thanks for the good summary. Just one question, where did testsign.jar come from? I'd like to get the source. Thanks!
JackZero said:
Thanks for the good summary. Just one question, where did testsign.jar come from? I'd like to get the source. Thanks!
Click to expand...
Click to collapse
Read this !
http://www.androiddevelopment.org/tag/apk/
;-)

Howto make a permanent change to $PATH?

Is there a way to make a permanent change to the $PATH variable to place /system/xbin ahead of /system/bin? I found /init.rc when the phone is booted, but obviously I can't make changes to that yet. When booted into recovery, I can't find the same file to edit it. The /init.rc file is specific to the recovery image at that point.
Basically, I have busybox installed in /system/xbin and want it to override the /system/bin apps. I do not want to install busybox in /system/bin.
Any help would be appreciated. Thanks!
are you trying to export a path? if so it would go something like
export PATH=$PATH /system/bin
or you can
PATH=$PATH /system/bin
export PATH
B-dub25 said:
are you trying to export a path? if so it would go something like
export PATH=$PATH /system/bin
or you can
PATH=$PATH /system/bin
export PATH
Click to expand...
Click to collapse
He's trying to make it so he doesn't have to reset the $PATH variable every time. I'm assuming you are currently just using something like.
export PATH=/system/xbin:/sbin:/system/sbin:/system/bin
every time you enter shell. The way I would do it is by editing the init.rc as you stated, however it doesn't stick on the incredible, also as you stated.
The only thing I can recommend is making it a shorter PATH to type. You could just enter
export PATH=/system/xbin:$PATH
for example, and that would accomplish the same thing with less typing.
The only other way that I know of would be to make a start-up script, not sure how to accomplish this outside of init.rc however. In linux I would add it to the bash_profile or something similar. Not sure how to do it in android...
Not only for shell, but I'd like to be able to do it for installed apps as well, such as OpenVPN. Ah well, just have to wait for full root unlock.
This is done in the ramdisk. You can actually do this yourself. You need to extract the boot image, break it apart into the ramdisk and kernel, alter the init.rc file, package it back up and then flash it back to your phone in recovery.
Even if we get the nand unlocked, you will still need to do this since the init.rc recreates itself from the ramdisk during each boot.
If you are using a custom ROM, just request the dev to do this.
ihtfp69 said:
This is done in the ramdisk. You can actually do this yourself. You need to extract the boot image, break it apart into the ramdisk and kernel, alter the init.rc file, package it back up and then flash it back to your phone in recovery.
Even if we get the nand unlocked, you will still need to do this since the init.rc recreates itself from the ramdisk during each boot.
If you are using a custom ROM, just request the dev to do this.
Click to expand...
Click to collapse
Thank you kindly, didn't know where those files were kept. Interesting how that works, so basically the phone works like a hardware chip, where the main parts of the OS recreate themselves from ROM, similar to firmware... I like it... prevents corruption I suppose.
Out of curiosity (I've never made a ROM, and therefor never packaged the boot image), is it packaged as a tarball? Or do you require ADB to extract? If you don't want to answer, I can probably track it down somewhere.
It's a bit more complicated than that. Take a look at this link. I'm sure there are other ways, but I would recommend only doing this in some flavor of Linux like Ubuntu.
HOWTO: Unpack, Edit, and Re-Pack Boot Images
ihtfp69 said:
It's a bit more complicated than that. Take a look at this link. I'm sure there are other ways, but I would recommend only doing this in some flavor of Linux like Ubuntu.
HOWTO: Unpack, Edit, and Re-Pack Boot Images
Click to expand...
Click to collapse
Cool link. Thanks.
But yea, pretty much seems to be that simple, Just a gzip (zip) and tarball (cpio). The only thing I wasn't expecting was stripping out the 2k header with a hex editor, but I think I'll try using the scripts found through that link to do that, not that I couldn't do it by hand... but I'm lazy...
Thanks again.

[Guide] Android Cooking Guide for HD2 [Guide]

heartsurfer008 said:
Well I am desparetly trying to cook a NAND build for my HD2 but there is pretty much less info available for me [a big NOOB in cooking] to try out my luck at cooking..!!!
So I'll appreciate if someone would put some light on it..!!!
PS: - I would appreciate if somebody can provide a detailed info..!!!
Click to expand...
Click to collapse
Finally the tutorial
Make your own Android Build for the HD2 by domineus ​I have always lived by these words- if you give a man a fish, he can eat for a day; but if you teach a man to fish you can eat for a lifetime. Android on the HD2 has always been an interesting thing for me and I know a lot of people that want to create their own builds, but have no idea how. If you ask a build creator or maybe someone in the htc-linux-chat how to get started, there may not be an answer. In fact, some of the perplexing behavior has left me puzzled in several ways - as if how to get an android build is a vaulted secret of knowledge like the holy grail. To be honest, it's not. It's a bit of hard work, a few nods in the right direction, and ultimately it's a community involved project. Just like miui development is a community project spanning actual continents to get this thing on our device every single week! It has led to a lot of questions, in my inbox, of how to begin. For a long time, the answer to the question was not answered until Cass helped me out. I want to do the same and contribute how to get a build of miui (or any android build) to the HTC HD2.
Things you will need
In order to properly start android development, it would be a good idea to make sure you have the following (a lot of it is no duh when you think about it)
A computer running linux
I can't stress that enough. While there is a lot of things you can do in windows, you will need some sort of linux distro in order to get android properly running on your HD2. There are a lot of linux distros you can use; with many using ubuntu as it is the most user friendly. I use Fedora and I am quite happy with the results. It's simple and effective. It gets the job done. Get a distro that you feel can get the job done.
Android SDK - either windows or linux
Android SDK is something that can be freely accessed and downloaded from the following location:
http://developer.android.com/sdk/index.html
It is a developer environment, but probably the most important thing you can use here (for the time being) is logcat. Logcat provides you to visually see the libraries and files working together to get android to work as well as if you run into an issue, it is the first thing you should resort to. For instance, boot reloop? Take a look at your logcat and try again.
A kernel
There are quite a few kernels available for android previously and they are divided into evo kernel or nexus one kernel. Many builders have transitioned to an evo kernel for PPP and a few other nice details but it is totally up to you. I highly recommend hastarin's kernel. For most of the time, it works well. But as you have noted, on MIUI, it hasn't been working as fantastic on other builds.
Donor Files
This is a bit difficult to find because it appears that the files that work best are nexus one builds without CM6.1 modification. So far, only one chef has that and it is tytung's nexus one build. Regardless of whose files you're using (e.g. tytung or darkstone's system which is the preferred choice) you will need a well working android build. You will be pulling several files in order to port.
MIUI itself (well any build honestly just miui is a good example)
This is a given. However, if you download from miui.com you will probably have an untranslated rom with odex files. That's bad. And in Chinese! It would be a good idea to browse the English forum for a deodexed rom with appropriate english translation (apps and frameworks)
-If pulling files from windows, you will need this
system extractor
http://uranus.chrysocome.net/linux/explore2fs-old.htm
I use that if I download in windows. It's relatively straight forward and it allows you to pull the files you need from the system.ext2 you're using and copying them to folders necessary.
build.prop
This you will need. You can find one here:
http://www.multiupload.com/B59IU3S6XY
Patience
Probably the most important thing. One thing I have noticed is you need patience to make it through. Sometimes, your build works, sometimes it doesn't. And it is difficult to still keep going. But gotta pull it all in and keep trying...it does pay off.
Okay so you have your files, a nice linux distribution, your build you want to port (MIUI preferrably) and you're ready to go. Now it's time to begin the process!
Step One - The Setup
I usually grab my files in windows before transitioning to my linux distro to finish the process. If you using windows 7 and you are using explore2fs, you will definitely have to right click on the exe and make it compatible by selecting compatible with windows vista. The file should also need to be run by administrator. If you don't know how to do that you can google compatibility in windows 7.
First thing is first. Create a new folder, you can call it donor_files if you want because name is arbitrary. The most important thing is to just name it. Within that folder, create a new folder called system. Enter the system directory and create a new folder called etc. Within etc, select Once that is done, create a new folder within etc called firmware. Once completed, return back to the system folder, create the folder called lib. In the lib folder, create a new folder called hw. So your folder should look like this:
Folder Name
-system
--etc
---firmware
--lib
---hw
So far so good? Excellent. Now, if you're in windows you will need to do a few things. Extract the system.ext2 of your donor build and place it somewhere you will remember (like your desktop). Now open up explore2fs, select file, and open image file. Under files of type (drop down), select all files and navigate to your system.ext2 file. You should now see the ext loaded on the left side of the program's workspace. Located is a very small + that allows you to view all directories in your ext2 file. Click that.
You will see several system folders on the left and files on the root. Since you haven't selected a specific folder, in the right hand view, you should see the file build.prop. If you did select a folder (like app) you will see some files. And that's okay too. Get a feel of the program.
Now you will do a test file pull. On the left hand side, select the folder etc. On the right window, you will see several files. We want AudioBTID.csv. Once you see the file, right click on AudioBTID.csv and select export file. Navigate to the donor file folder (or whatever you named it) and place the file in system/etc of that folder. Congratulations you just pulled your first file! But you will need a lot more files. Within the same directory, pull gps.conf, hosts, media_profiles.xml and the ppp folder. Now, navigate to firmware and pull the following files:
BCM4329B1_002.002.023.0360.0362.hcd default_france.acdb htcleo.acdb
BCM4329B1_002.002.023.0436.0439.hcd default_nel.acdb yamato_pfp.fw
bcm4329.hcd fw_bcm4329_apsta.bin yamato_pm4.fw
default.acdb fw_bcm4329.bin
Ideally you should not be able to find htcleo.acdb. You can find it here
http://gitorious.org/xdandroid_leo/q...eo/htcleo.acdb
Now in explore2fs, go to the lib directory and pull these files and place them in your lib directory:
libcamera.so
libcamera_client.so
libcameraservice.so
libhtc_ril_wrapper.so
libmm-omxcore.so
liboemcamera.so
libomx_aacdec_sharedlibrary.so
libomx_amrdec_sharedlibrary.so
libomx_amrenc_sharedlibrary.so
libomx_avcdec_sharedlibrary.so
libomx_m4vdec_sharedlibrary.so
libomx_mp3dec_sharedlibrary.so
libomx_sharedlibrary.so
libomx_wmadec_sharedlibrary.so
libomx_wmvdec_sharedlibrary.so
libOmxCore.so
libOmxVdec.so
libOmxVidEnc.so
libqcomm_omx.so
libstagefright_omx.so
Once those files are pulled, navigate to the hw folder of the system and pull the following files:
sensors.htcleo.so
lights.htcleo.so
Once those files are pulled, you can save your donor files to a flash drive and then boot into your linux distro. Login to superuser in terminal. For fedora, the proper method involves typing in su --login and entering your password you set up. Minimize your terminal window.
Extract the miui (or any other build) to your desktop (the focus is the system folder). Ensure the rom is deodexed and in your own language (if its miui, you will have to apply the proper language translations). Now copy the files you pulled from your donor build and apply it to the appropriate folders (usually a copy and a paste-literally). In this instance there will be duplicate files, overwrite them. That's the point! Do not forget the build.prop file I linked to earlier. You should add that to system folder.
So the files are copied, the next step is to restore the minimized terminal window (the one that is logged in as root). cd to where your system is located (not to the system folder itself). Now you will have to enter the following commands in terminal
chmod -R 777 system/etc
chmod 755 system/bin/*
chmod 755 system/xbin/*
rm system/etc/firmware/default*acdb (if you have sound in call issues)
touch system/etc/ppp/active (If you have latest wrapper and need ppp)
chown root:2000 system/bin/pppd
chmod 4755 system/bin/pppd
chown root:root system/xbin/su
chmod 4755 system/xbin/su
chown root:root system/xbin/hci*
chmod 4755 system/xbin/hci*
dd if=/dev/zero of=system.ext2 bs=1048576 count=256
mke2fs -F system.ext2
sudo mount -o loop system.ext2 /mnt2
cp -rp system/* /mnt2
sudo umount /mnt2
A few words on this that I must bold. the /mnt2 directory may not exist. If not, try mnt, that usually works
Once this is done, you will have a nice system.ext2. The only thing you'd need now is a rootfs, a kernel, clrcad.exe and a startup.txt file. Once that is done, you can test your build out.
Any questions
Special thanks to Cass and the htc-linux-chat for the few pointers they gave me.
The guide is by "domineus - http://www.miui-dev.com/" & I take no credit what so ever​
Thanks to "white-energy" for giving us the link..!!!
Hope to have many more Chief's for our HD2, so that we [especially me] can satisfy our hunger to try different builds/ROM's..!!!
Happy Cooking..!!!​
PLEASE PRESS THANKS IF YOU FOUND THIS THREAD USEFUL..!!!​​
+ 1... nobody wants to share information?
I don't know if this help but you can try
http://forum.xda-developers.com/showthread.php?t=897940
These kind of thread pop up once in awhile, but it's going no where, I've never seen well known chef show up in this kind of thread.
knowledge is power, maybe they dont want to share the power
Can anybody out there give us a step by step guide for cooking a NAND ROM for HD2..???
http://www.miui-dev.com/forums/showthread.php?481-Howto-Make-your-own-Android-Build-for-the-HD2
Instead of making a ext image, you should make a yaffs image.. so it can work on Nand
white-energy said:
http://www.miui-dev.com/forums/showthread.php?481-Howto-Make-your-own-Android-Build-for-the-HD2
Instead of making a ext image, you should make a yaffs image.. so it can work on Nand
Click to expand...
Click to collapse
Thank you, please check post 1..!!!
I've been looking for something like this. I want to create my own build for the recovery flasher. I guess the only thing needed would be how to convert from regular nand to recovery.
Thanks bro.
velayo said:
I've been looking for something like this. I want to create my own build for the recovery flasher. I guess the only thing needed would be how to convert from regular nand to recovery.
Thanks bro.
Click to expand...
Click to collapse
I was lookin for the same & credit goes to domineus & white-energy
& "white-energy" comes up with a NAND ROM..!!!
Congrats..!!!
white-energy said:
http://www.miui-dev.com/forums/showthread.php?481-Howto-Make-your-own-Android-Build-for-the-HD2
Instead of making a ext image, you should make a yaffs image.. so it can work on Nand
Click to expand...
Click to collapse
Are you sure its the only difference? Are the nand drivers stored only in the bootimg/initrd and not somewhere in the system.img?
yes or no will do for me thx
Is there a way to edit system.bin files, that comes with the NAND builds. I suppose that is where the ROM is. I want to unpack, edit the included apps and repack. How it is done? How the bin file is done. Google does not give any satisfiable links, did a quick search, though...
i am confused
Which explore 2fs do I download? There are 3 different ones one for binary one for code and optional update source code. I am a noob and tired of not having roms I am happy with. I have windows 7 and xp. I realize this will take time and I am good with it everything thats worth anything takes time.
deckoff said:
Is there a way to edit system.bin files, that comes with the NAND builds. I suppose that is where the ROM is. I want to unpack, edit the included apps and repack. How it is done? How the bin file is done. Google does not give any satisfiable links, did a quick search, though...
Click to expand...
Click to collapse
I think you mean system.img not system.bin
You can extract them with the unyaffs.exe or with the unyaffs command under linux. I have written a guide with attatched utilities here
Additionally birksoffsjunk (seasoned WM guru & chef of ChuckyDroid, ChuckyROM, & Dexter) has made a batch program to make this process easier. It's a work in progress & somethings are still buggy so follow the thread
Between the utility birkoffsjunk made & the tutorial I wrote you should be able to successfully edit & run your own build. Hope this helps.
deckoff said:
Is there a way to edit system.bin files, that comes with the NAND builds. I suppose that is where the ROM is. I want to unpack, edit the included apps and repack. How it is done? How the bin file is done. Google does not give any satisfiable links, did a quick search, though...
Click to expand...
Click to collapse
I think you mean system.img not system.bin
You can extract them with the unyaffs.exe or with the unyaffs command under linux. I have written a guide with attatched utilities here
Additionally birksoffsjunk (seasoned WM guru & chef of ChuckyDroid, ChuckyROM, & Dexter) has made a batch program to make this process easier. It's a work in progress & somethings are still buggy so follow the thread
Between the utility birkoffsjunk made & the tutorial I wrote you should be able to successfully edit & run your own build. Hope this helps.
anyone know how to edit or anything about initrd.gz?
hnamanh said:
anyone know how to edit or anything about initrd.gz?
Click to expand...
Click to collapse
It's an archive that can be decompressed and edited thru linux.
White-Energy use system.bin in his rom
Regarding initr and zimage, there is a guide that you can point me on ?
Thank you
KillaHurtz said:
I think you mean system.img not system.bin
You can extract them with the unyaffs.exe or with the unyaffs command under linux. I have written a guide with attatched utilities here
Additionally birksoffsjunk (seasoned WM guru & chef of ChuckyDroid, ChuckyROM, & Dexter) has made a batch program to make this process easier. It's a work in progress & somethings are still buggy so follow the thread
Between the utility birkoffsjunk made & the tutorial I wrote you should be able to successfully edit & run your own build. Hope this helps.
Click to expand...
Click to collapse
I have only green HTC
Hello
I would like to use Android on my HD2. I was searching and testing many ROMS but I didn´t find any rom which is usable for me. I would like to have a ROM that is without Sense, has Multilanguage support and is on Android 2.2 version.
So I decided that I would make my own.
0) I was reading
HTML:
http://forum.xda-developers.com/showpost.php?p=10291851&postcount=1
and made this procedure.
1)downloaded some ROM from here
2)unpacked this rom in linux with :
Code:
unyaffs system.img
then I got this directories:
Code:
app bin build.prop etc fonts framework lib media usr xbin
3)I downloaded update-cm-6.1.1-N1-signed.zip from CyanogenMod Forum > Downloads > Stable Mod > Nexus One and unpacked. I got : META-INF system boot.img.
4)I copied everything what was described step 0 from directories from step 2 to directory system from step 3
5)I downloaded and copied build.prop from step 0 to system
6) I updated permition like it is described in step 0
7) I created system.img with command : mkyaffs2image . ../system.img
Then I copied this system.img from linux to my windows and put this file in directory in which was different NAND rom. (replaced system.img). After that I flashed my phone and it did not work. Screen was frozen after booting and only green HTC was on display.
Can somebody please help me and give me some advice or some small howto. Does anybody know what can be wrong?
Thank you
Michal Fichtner
I appreciate the guide but damn that is hard to read. It really needs some sort of structure to it, titling proper paragraphs etc.
Hi,
it is possible to combi the dropdown energy widget froom miui and the gingerbread lockscreen into Desire HD Build?
Thats was awesome !
Sorry for my bad english

[Q] Help with building stock kernel

I would like to learn how to build stuff for my tmobile s2. I figured I should try to build the stock kernel first to get my hands dirty. I have been following this guide here: http://forum.xda-developers.com/showthread.php?t=1442870
Unfortunately it is for the Epic Touch 4G, but I think a lot is similar. I have several questions regarding building a kernel for the T989:
1) How can I extract the initramfs from a stock boot.img?
2) The guide from the link above tars a zimage file. Does this need to be boot.img for the T989?
Thanks.
Below I have posted what I have done so far in trying to compile a kernel for the T989, in case anyone else is also learning like me.
I am using Ubuntu 10.10 32-bit
1) Download T989 source code from here: https://opensource.samsung.com/reception/receptionSub.do?method=search&searchValue=SGH-T989 (download the T989 version for TMobile)
2) unzip SGH-T989_GB_Opensource.zip
3) extract SGH-T989_Kernel.tar.gz
4) next you need to get a version of the initramfs. I got it off of my phone using clockworkmod backup (boot.img file) and following this guide to extract the initramfs: http://www.freeyourandroid.com/guide/extract-edit-repack-boot-img-windows
5) Download arm toolchain here (I use version 2010.09): https://sourcery.mentor.com/sgpp/li...09-51-arm-none-eabi-i686-pc-linux-gnu.tar.bz2
6) extract toolchain
7) Setup cross compile script (run before doing compiles) (change CROSS_PATH for your setup):
cross-compile.sh:
BINVERSION=arm-2010.09
export ARCH=arm
export CROSS_PATH=~/android/toolchains/${BINVERSION}/bin/
export CROSS_NAME=arm-none-eabi-
export CROSS_COMPILE=${CROSS_PATH}${CROSS_NAME}
export CC=${CROSS_NAME}gcc
export CXX=${CROSS_NAME}g++
export LD=${CROSS_NAME}ld
export STRIP=${CROSS_NAME}strip
PATH=${CROSS_PATH}:$PATH
8) Compile script (modify CONFIG_INITRAMFS_SOURCE to point to your initramfs) :
source ../scripts/cross-compile.sh
cd kernel
make clean
make mrproper
make msm8660_celox_usa_tmo_defconfig
make modules
make -j5 CONFIG_INITRAMFS_SOURCE=../initramfs
9) The kernel image is in "arch/arm/boot/zimage"
10) *** Question: How do I make the zimage "odin" compatible
This is still not complete (Steps 10 is unsolved). I need to make the build image odin compatible.
If anyone knows of a kernel building guide that exists for the T989 please post here.
Thanks.
You should pm the devs that posted their kernels in the dev section. Im sure they would love to help. Even exchage google talk or google + with each other to get quicker answers.
sent from the Dark §¡3€
I noticed you hit up the e4gt thread so I came here to see If I can help. If you have Irc I can walk you thru It all the way. I lost all my data today so my machine is down for building. im on freenode #evervolv ...
interloper, thanks for the kind offer. Please let me know when your machine is up and running. Hope to hear from you. Thanks again.
This is the script you want to use to extract the initramfs http://forum.xda-developers.com/wiki/Extract_initramfs_from_zImage
It works for the E4GT without modification so it should work for you guys without modification.
dtm_stretch,
Thanks for the extract script. The script does not work when I try to extract the initramfs from a boot.img I got from doing a backup with clockworkmod. It only manage to extract two empty folders: "dev" and "root"
However, the script does work when I tried it on a zImage I built myself. With the kernel I built I used the initramfs provided at: https://github.com/bubby323/anomaly_kernel_platform_SGH-T989/tree/master/initramfs
I know I can use the initramfs at the github but I really would like to learn how to get it myself so I can apply to other phones later. The knowledge is more important to me.
Thanks.
I was able to extract the initramfs from the boot.img (cwm backup of my phone) using the tools at this site: http://www.freeyourandroid.com/guide/extract-edit-repack-boot-img-windows
Now my only problem is making a odin compatible (flashable) kernel from the compiled zImage. Is it as simple as renaming zImage to boot.img and then put it in a tar to flash with odin? The only reason why I am not certain is my zImage is only about 5megs while the boot.img is 10megs. It seems like the boot.img is a disk copy of the flash partition for the boot on the phone. Do I need to use dd to copy my zImage into boot.img?
I know I make no sense. Hopefully with this last step I have it all down (at least for creating a kernel, rom is next). Please help a noob. Thanks.
datzstr8 said:
I was able to extract the initramfs from the boot.img (cwm backup of my phone) using the tools at this site: http://www.freeyourandroid.com/guide/extract-edit-repack-boot-img-windows
Now my only problem is making a odin compatible (flashable) kernel from the compiled zImage. Is it as simple as renaming zImage to boot.img and then put it in a tar to flash with odin? The only reason why I am not certain is my zImage is only about 5megs while the boot.img is 10megs. It seems like the boot.img is a disk copy of the flash partition for the boot on the phone. Do I need to use dd to copy my zImage into boot.img?
I know I make no sense. Hopefully with this last step I have it all down (at least for creating a kernel, rom is next). Please help a noob. Thanks.
Click to expand...
Click to collapse
Sorry for not replying sooner, but if you want to create a flashable tar in terminal
Code:
# cd /where/your/zimage/is/located
# tar cvf whateveryouwanttocallyourkernel.tar zImage
or you can just use a zip that already flashes a kernel and swap out the zimages.
I was able to successfully build my kernel and flash it to my phone. I needed to use mkbootfs and mkbootimg to combine my zImage and ramdisk to make boot.img. I will post a tutorial up in the development section and will link it here when I am done. Hopefully it will help all the noobs like me get their feet wet. Stay tuned.
update:
here is the link to the guide: http://forum.xda-developers.com/showthread.php?p=22941057#post22941057
ODIN .tar
I advise all of you to learn bash scripting. With bash scripting or pearl you can automate this entire process. Also create a cheat sheet text document with long but common commands, git command reminders and things like that. These commands should create your ODIN .tar file. First cd to the directory the junk is in then:
Code:
tar -H ustar -c factoryfs.rfs cache.rfs modem.bin zImage boot.bin recovery.bin param.lfs sbl.bin > myOdin.tar
That makes the tarball
Then:
Code:
md5sum -t myOdin.tar >> myOdin.tar
That does the MD5 sum
Then:
Code:
mv myOdin.tar myOdin.tar.md5
That sign the tarball with the MD5 sum
You should be able to ODIN that .tar. Now, for the first command you can replace whatever files you want tarred with what I put. If you only want the modem.bin specify that only, etc.
Another word of advice is to find helpful helpful Nautilus scripts to ad to the right click context menu for time saving simple operation. Google it and you find several good resources. Also, if you look, there are Nautilus scripts that can be added to zip and sign .zip and .apk files to make that faster and easier.
Be careful out there and good luck.

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