Develop Bugs

i would like to build my own kernel but i am not able to.. help me pls

I would like to build my i9000's kernel but there are problems
I've installed ubuntu 9.10.
As you know, i could download the source code from the web
In that there are codes for making kerne
and also there is a script, named build_kernel, which makes me be able to build the kernel.
At first, i installed sourcery toolchain and then modified the build_kernel.sh
Because the instruction said i should change toolchain's directory and prefix
And finally i built it writing './build_kernel.sh'.
It seemd to be working but there were so many errors
And the zimage file was small, it's only 2.1MB
I tried to flash that kernel but it made my phone go black.
Can anyone help me please?
What should i do?
How did some people make such great kernels? Sorry im newbie.

dkcldark said:
I would like to build my i9000's kernel but there are problems
I've installed ubuntu 9.10.
As you know, i could download the source code from the web
In that there are codes for making kerne
and also there is a script, named build_kernel, which makes me be able to build the kernel.
At first, i installed sourcery toolchain and then modified the build_kernel.sh
Because the instruction said i should change toolchain's directory and prefix
And finally i built it writing './build_kernel.sh'.
It seemd to be working but there were so many errors
And the zimage file was small, it's only 2.1MB
I tried to flash that kernel but it made my phone go black.
Can anyone help me please?
What should i do?
How did some people make such great kernels? Sorry im newbie.
Click to expand...
Click to collapse
check few threads behind you ... it is illustrated in the links.

Compiling a working kernel

Hi all,
I recently began editing the Galaxy S kernel, from the downloadable open source package.
After some time I compiled my changes into a zImage. My problem is, it won't flash when i put it in the most recent PHONE_I9000XWJG5.tar.
Odin3 just hangs at Flashing zImage...
My zImage is about 2.5MB in size, and the original JG5 zImage is 4.6MB, so I guess I am missing something.
I think I am missing the modules (which you can also compile). But I'm not sure.
Does anyone know how to compile a working kernel for the Samsung Galaxy S?
Thanks in advance!

First:
Read here: http://www.cianer.com/androidg1/28-building-android-kernel-images
Then here: http://www.receptorblog.com/wordpress/howto-compile-a-linux-kernel-for-samsung-galaxy/
and finally here: http://forum.samdroid.net/f9/dev-vmware-image-build-i5700-kernel-2-6-29-android-2-1-a-984/

not update.zip,why?
In recovery, no sd update.zip option, how can I tune out?

I'm also trying to make a new kernel based on JM5.
My goal is to fix the BlueTooth issues.. I think i've found the problem in a kernel's .c file...
I'm following this link:
HERE
I'm downloading the GT-i9000 opensource ZIP from Samsung, but i don't quite understand where can i get the Android Toolchain....
Is It really 6GB as it says HERE ?
I wish there was a XDA-like tutorial for this

Flashing Galaxy S kernel from update.zip : template update.zip

NEWS :
Koush's bmlunlock (a simple IOCTL send to the bml device) is just out and can replace redbend_ua !
http://github.com/CyanogenMod/android_device_samsung_bmlunlock
Hey
Is Flashing from update.zip the new trend ?
'Don't know but here is how you can do it quite easily using this template.
If you target a GT-I9000 on Eclair, you'll need to customize one thing :
In build-update-zip.sh, set DROID_HOME to the source code path for your local Android repository.
If you target another Galaxy S phone or another version of Android, you'll need to adjust ro.hardware and ro.build.id properties accordingly.
This template is done for Linux/Unixes/OSX.
If Linux cost too much for you or your employer, please contribute by sending a .bat equivalent to the .sh
Of course, you also need to put a valid zImage to replace the template's empty zImage
Feel free to adjust to your needs. License is WTFPL
Note : requirement are Java and Android source repo, already build.

Looks awesome!
I have a question though... why do you need to flash the kernel in an update.zip at boot?
As far as I know, the system will read the kernel at boot up time and load it into ram. It won't access the on-disk file again until the next boot. If that is true, then flashing while running should be 100% safe, right?

RyanZA it's an update.zip, not a ramdisk.
The point is getting an easy flashing method, requiring no computer.
And you don't even need to root your phone !

curio, as i see this script is quite simple, so dont u think this all could actually be done on the phone directly? i mean if people cant afford a linux machine...
edit:
sorry for major dumbness, but do you think this could also somehow be used to reflash a nandroid backup?

FadeFx said:
curio, as i see this script is quite simple, so dont u think this all could actually be done on the phone directly? i mean if people cant afford a linux machine...
Click to expand...
Click to collapse
I don't think the signing tool works on android -- maybe it does? Anyway editing scripts on a phone seems a bit silly!

FadeFx said:
curio, as i see this script is quite simple, so dont u think this all could actually be done on the phone directly? i mean if people cant afford a linux machine...
edit:
sorry for major dumbness, but do you think this could also somehow be used to reflash a nandroid backup?
Click to expand...
Click to collapse
Nope actually this is not dumb at all
Yes the flashing part run in updater-script can be started manually.
In the script :
Code:
"redbend_ua", "restore", "zImage", "/dev/block/bml7"
The update.zip presented here mainly targets custom kernel creators in order to give them another way to distribute their work.
This is a working example of how to use redbend_ua programmatically, hopefully it may help new ideas coming. redbend_ua usage is not limited at all to kernel flashing.
PS : you can use this template with windows as well, you'll just need to translate the ulta-basic .sh to a .bat script, or do the signing part manually.

supercurio said:
Hey
If you target a GT-I9000 on Eclair, you'll need to customize one thing :
In build-update-zip.sh, set DROID_HOME to the source code path for your local Android repository.
Click to expand...
Click to collapse
quick question, the build-update-zip.sh is not a must if i only want to flash zImage, rite?
looks like that, I need to modify updater-script (if needed), as well as putting a zImage into ur zip file, and finally remove the build-update-zip.sh from ur zip attached
then, ur zip file can be used for flashing
is it correct?
thx

So this will let people flash any rom from an update.zip (once the ROM makers take this into account) via RomManager without ever having to use Odin to get off stock?
Awesome!

Thanks for the update script curio! this looks great.
One quick question - ive noticed several update.zip scripts for the galaxy S
have update-binary included.
Does anyone know what that does?? where did you get yours?
ive had success in using update.zips without that file at all.
Could anyone post information on what that binary is/does?
supercurio said:
Hey
Is Flashing from update.zip the new trend ?
'Don't know but here is how you can do it quite easily using this template.
If you target a GT-I9000 on Eclair, you'll need to customize one thing :
In build-update-zip.sh, set DROID_HOME to the source code path for your local Android repository.
If you target another Galaxy S phone or another version of Android, you'll need to adjust ro.hardware and ro.build.id properties accordingly.
This template is done for Linux/Unixes/OSX.
If Linux cost too much for you or your employer, please contribute by sending a .bat equivalent to the .sh
Of course, you also need to put a valid zImage to replace the template's empty zImage
Feel free to adjust to your needs. License is BSD anyway.
Note : requirement are Java and Android source repo, already build.
I'll add some documentation later.
Click to expand...
Click to collapse

dseo80 said:
Thanks for the update script curio! this looks great.
One quick question - ive noticed several update.zip scripts for the galaxy S
have update-binary included.
Does anyone know what that does?? where did you get yours?
ive had success in using update.zips without that file at all.
Could anyone post information on what that binary is/does?
Click to expand...
Click to collapse
Thats for the updater-script i believe. In most cases, theres a update-script in the zip's as well and the recovery picks that up in which case it doesn't need the binary and hence works.

Okay !
Answers hour
ykk_five said:
quick question, the build-update-zip.sh is not a must if i only want to flash zImage, rite?
looks like that, I need to modify updater-script (if needed), as well as putting a zImage into ur zip file, and finally remove the build-update-zip.sh from ur zip attached
then, ur zip file can be used for flashing
Click to expand...
Click to collapse
When you run ./build-update-zip.sh,
- it produce a temp zip file containing appropriate files in it.
- then there'is the signature part, building another .zip, ready to be used.
- this "final" update.zip is put in the same current directory and you can use it as it is.
No further complication
Brantyr said:
So this will let people flash any rom from an update.zip (once the ROM makers take this into account) via RomManager without ever having to use Odin to get off stock?
Awesome!
Click to expand...
Click to collapse
Yes, to flash a complete ROM (several partitions) one more thing is needed.
On command line, redbend_ua accept only one command.
In order to run several commands successively (ie flash multiple partition like Odin does), you'll need to write them in a file.
The file /cache/ota/command should do the trick, but it's untested right now.
There may be other method to prevent rebooting after flashing (hacking the redbend_ua binary, finding the appropriate command line option or removing the reboot command temporary)
dseo80 said:
Thanks for the update script curio! this looks great.
One quick question - ive noticed several update.zip scripts for the galaxy S
have update-binary included.
Does anyone know what that does?? where did you get yours?
ive had success in using update.zips without that file at all.
Could anyone post information on what that binary is/does?
Click to expand...
Click to collapse
Right, many update.zip done today are made without knowing anything about how it really works
I studied a bit before creating mine, here is a walk-through this fairly undocumented process :
- recovery mounts /sdcard/
- recovery search for a default file named : META-INF/com/google/android/update-binary in the zip and runs it : see the source in bootable/recovery/install.c
- update-binary is actually updater in sources
- updater looks into the zip file to the script file named updater-script, update-script is obsolete
- updater then runs the commands listed in updater-script : here is the list of commands.
- then reboot
The only documentation I know for this command is the recovery/updater/install.c file itself

supercurio said:
When you run ./build-update-zip.sh,
- it produce a temp zip file containing appropriate files in it.
- then there'is the signature part, building another .zip, ready to be used.
- this "final" update.zip is put in the same current directory and you can use it as it is.
Click to expand...
Click to collapse
ok,thx
but one more thing i want to know is, u said the path must be changed to the android repo, so do u mean the source code for the kernel like linux-xxx-2.xxx dir?
Thx

@ykk_five
Content of build-update-zip.sh v1 :
Code:
#!/bin/sh
DROID_HOME="/home/curio/dev/mydroid"
zip -r /tmp/update.zip META-INF/ redbend_ua zImage
java -jar \
$DROID_HOME/out/host/linux-x86/framework/signapk.jar \
$DROID_HOME/build/target/product/security/testkey.x509.pem \
$DROID_HOME/build/target/product/security/testkey.pk8 \
/tmp/update.zip update.zip
rm /tmp/update.zip
adb push update.zip /sdcard/
DROID_HOME="/home/curio/dev/mydroid" : you set here the directory of your Android AOSP directory.
See : http://source.android.com/source/download.html
Create an empty directory to hold your working files:
$ mkdir mydroid
$ cd mydroid
Run "repo init" to bring down the latest version of Repo with all its most recent bug fixes. You must specify a URL for the manifest:
$ repo init -u git://android.git.kernel.org/platform/manifest.git
* If you would like to check out a branch other than "master", specify it with -b, like:
$ repo init -u git://android.git.kernel.org/platform/manifest.git -b cupcake
Click to expand...
Click to collapse
This is this mydroid directory
The one that contains Android git source home directory, and compiled files in the out/ subdir

many thx for ur detailed explanation, supercurio!

Thanks curio,
very helpful explanation!

Thanks supercurio for the template!
However, there is no need to spend many hours (depending on hardware and bandwidth) pulling down 100s of megabytes of source and compiling it all if all you want is to sign an update.zip with test keys (if you already have the zImage)!
Just google around for "signapk.jar test keys" and you will get there.
BTW: I know that koush, leshak and wesgamer have Samsung Galaxy S trees up at Github but are they fully merged with AOSP yet?
I'm planning to go build my own kernel for this beast to try to solve the mono FM radio mystery, but last time I checked around it was said that the SGS tree required the use of a custom toolchain to get it to work at all.
Any comments on this?

Hey miki4242 !
Good to know that signapk.jar doesn't require hundred of megs of dependencies
About toolchain, you can use the one indicated by Samsung (CodeSourcery) but you'll face the big and ugly WakeLag.
I recommend you crosstool-ng or buildroot to build toolchains, with gcc 4.3.x march=arm mcpu=cortex-a8 mtune=cortex-a8 (no 4.4.x with march=armv7-v)
The building tutorial will be a part of the documentation I'll publish with my lagfix opensource release
Right now these info are too hard to find.
PS : I send you a mail with attached .config for ct-ng !

supercurio said:
Hey miki4242 !
Good to know that signapk.jar doesn't require hundred of megs of dependencies
Click to expand...
Click to collapse
supercurio said:
PS : I send you a mail with attached .config for ct-ng !
Click to expand...
Click to collapse
Thanks for the info !

Sorry for my ignorance, but does this mean someone can package Froyo in an update.zip and we could update it directly on our phone without needing Samsung Kies or Odin?

@supercurio:
Thanks for this well working template.
In updater-script:
Code:
line 17: package_extract_dir("zImage", "zImage");
should be
Code:
package_extract_file("zImage", "zImage");
But it did work with package_extract_dir, for some reason, too.
Btw, could you send me the config for ct-ng ?
I'm also struggling with this wakelag.

[HOWTO] Modify stock kernels' initramfs / Repack it

1. Usage
./editor.sh [place where the kernel is] [ place where your ramdisk is]
### you must let editor.sh know where your cross compiler is.
open "editor.sh" and edit COMPILER
2. Example
./editor.sh /home/zero/Desktop/test/zImage /home/zero/Desktop/test/my_initramfs.cpio
3. Info
- can not use an initramfs which is bigger than the stock initramfs.cpio's size
>> for instance, stock JM8's got an "initramfs.cpio" which is 3.4MB.
you can use reasonably bigger initramfs by gzipping the initramfs.cpio ->> initramfs.cpio.gz
this process reduces the initramfs.cpio's size but still can't use if initramfs.cpio.gz is bigger than 3.4MB
(this means that if a kernel already has gzipped initramfs, it is difficult to make it. you may want to remove something in order to have more room.)
- you can choose either your_initramfs.cpio or your_initramfs.cpio.gz
(this script compresses the ***.cpio if this is bigger than the stock.)
4. how to extract an initramfs from a kernel?
go to here
http://forum.xda-developers.com/wiki/index.php?title=Extract_initramfs_from_zImage
Thanks gshklover!

Thanks for this! I really appreciate the work you are doing
Sent from my GT-I9000 using Tapatalk

Sweet! Awesome work.

Any reason you now have TWO threads about this subject ? (Or: why not edit / add to your other thread about this ?)
Also, I have a toolset to do all this on Windoze without Linux and compilers... I used it to build the JPH root, but haven't tested it on enough kernels yet to consider it stable and publicly release it.

Hi,
I have tried these scripts on i9000WXJPA and '070701' is found 60 times and 'TRAILER!!!' is found 2 times! I find it a bit risky to assume that the first match is the right one!! z4ziggy's script doesn't even contain the -m 1 so I guess he believes there will always just be one entry!! There must be a safer way to extract initramfs from a zImage. Doesn't the header contain the exact entries where to find the partitions?
Thanks
JKay

Great script, thanks.
I'm trying to port this for use with the Galaxy 3.. uses s5p6442 processor.
Any idea what the mcpu and other flags/values would be when it's rebuilding the image?
Thanks

The eclair kernel compilation comes up with
-D__LINUX_ARM_ARCH__=6 -march=armv6k -mtune=arm1136j-s
Click to expand...
Click to collapse
apparently s5p6442 is s5p6440's poorer cousin (the latter has at least a better CPU, arm1176jzf-s), but there's no information to be found on Samsung's website about it
good luck in making it boot and please share if you make it work, I didn't manage to get it working yet (I'm using z4mod and so far it's generating an invalid zImage)

Chainfire said:
Any reason you now have TWO threads about this subject ? (Or: why not edit / add to your other thread about this ?)
Also, I have a toolset to do all this on Windoze without Linux and compilers... I used it to build the JPH root, but haven't tested it on enough kernels yet to consider it stable and publicly release it.
Click to expand...
Click to collapse
Anyone mind to explain what the "compiling" is doing in a few words? It seems start and end are not changeable anyway.. checksums maybe? wild guess. Just curious. It works fine anyway.

[GUIDE][KERNEL] porting a kernel from another device

Made By :Spacecaker
What u need
windows or linux
ROM (that u wanna port to ace )
Dev Tools (like pack/unpack boot.img) Like this for windows and or linux
What u need to do??
unpack your boot.img
Change file on ramdisk
init.rc need to change >> (unpack the boot img from rom u wanna port
open init.rc and copy the stuff after BOOTPATH
change ramdisk/lib/modules >>> your modules ( not really importatnt )
repack ramdisk boot.img
Download the Guide below to get some pictures +
more tips download http://www.mediafire.com/download.php?u2ff9tthrrc29h1
Click to expand...
Click to collapse
orginel thread : http://forum.xda-developers.com/showthread.php?t=1574332

have you tried to port a kernel before? this guide doesn't mention about some spesific important stuff. it will definetely brick our device.

cool
a cool guide. find as pdf attached

this is only an example. our kernel partition is only 5mb. any size bigger wont work. then how about initbcrm2153 file?the zImage file? i've made two kernel. its difficult. port a kernel is more difficult and definetely not as easy as described in this post.

kurotsugi said:
this is only an example. our kernel partition is only 5mb. any size bigger wont work. then how about initbcrm2153 file?the zImage file? i've made two kernel. its difficult. port a kernel is more difficult and definetely not as easy as described in this post.
Click to expand...
Click to collapse
this guide is made by Spacecaker
he is developer ... so defenetly it will not brick our device .........

kurotsugi said:
this is only an example. our kernel partition is only 5mb. any size bigger wont work. then how about initbcrm2153 file?the zImage file? i've made two kernel. its difficult. port a kernel is more difficult and definetely not as easy as described in this post.
Click to expand...
Click to collapse
porting is too easy
if you have any doubts just check the attached file ! !
he also provided with SS ........
we can easily port it into our deveice

then...prove it. try to port a kernel from mini.
you also forgot this part. whithout this part our device won't work
===============================
then add/replace these in the rom it self ( copy from stock or cm7 )
These are Always needed !!
/lib/libril.so
/lib/libsecril-client.so
/lib/libsec-ril.so
/lib/libdiag.so
/system/hw
/system/modules
/system/etc/firmware , ppp, security, wifi, permission vold.stab
/system/user/keychars, keylayout
========================
one problem also comes from our recovery mode. unfortunately in our device it was stored inside kernel while in other device it was stored in different place.

It can Brick our Device
First Check it is Working and Then Post

thx for it i will try it

i dont think its that easy.. if it would hav been then we would hav had a kernel long back!!

hell_lock said:
i dont think its that easy.. if it would hav been then we would hav had a kernel long back!!
Click to expand...
Click to collapse
if porting means use kernel binary from one device to other device, not only not easy, but near to impossible. unlike pc which architecture is standardized, every cellphone have their own architecture make it impossible create generic kernel like you find in linux distro. you change hardware, it does't work. you mix with module from different version, it does't work. you mix with module from different compiler version, it does't work.
if porting means source code modification, that could be work, but need a lot of work. if someone ask how hard, last time i write my patch, i need about 6 hour just to add 2 lines modification in kernel source. i use linux in last 9 years and in real life i am a programmer, so reading c source code is something that i do almost everyday. still, i need that 6 hour because linux kernel source code is very complex.
and why op give this thread's title kernel. the tutorial is about using rom from other device using your original kernel.

irfanbagus said:
if porting means use kernel binary from one device to other device, not only not easy, but near to impossible. unlike pc which architecture is standardized, every cellphone have their own architecture make it impossible create generic kernel like you find in linux distro. you change hardware, it does't work. you mix with module from different version, it does't work. you mix with module from different compiler version, it does't work.
if porting means source code modification, that could be work, but need a lot of work. if someone ask how hard, last time i write my patch, i need about 6 hour just to add 2 lines modification in kernel source. i use linux in last 9 years and in real life i am a programmer, so reading c source code is something that i do almost everyday. still, i need that 6 hour because linux kernel source code is very complex.
and why op give this thread's title kernel. the tutorial is about using rom from other device using your original kernel.
Click to expand...
Click to collapse
thank you. i just wanna post the same thing before saw your post, and you're right indeed. theres no such thing as "porting kernel". binary kernel is specific, it'll only work with the device it were originally compiled for.

ROFL.....
BTW dont post tutorials , ports, etc that are somewhat copy paste and not tested it yourself..

Hey what about drivers... I wanted to get usb otg drivers on galaxy ace plus... Some dev ported it from galaxy s2 to galaxy s... But i dont have much knoladge of kernel development as i have windows... And i also found few lines about otg in my volt.fstab
# otg sdcard
{
ums_path = /dev/zero
asec = disable
}
usb_mount sdcard2 /mnt/sdcard/usbStorage auto /devices/platform/msm_hsusb_host.0
#end line ## keep this line
So i think it can support usb otg but doesnot have drivers...
Can any one help....or suggest something...
Sent from my GT-S7500 using xda premium

NICE!
Nice thanks!

kurotsugi said:
then...prove it. try to port a kernel from mini.
you also forgot this part. whithout this part our device won't work
===============================
then add/replace these in the rom it self ( copy from stock or cm7 )
These are Always needed !!
/lib/libril.so
/lib/libsecril-client.so
/lib/libsec-ril.so
/lib/libdiag.so
/system/hw
/system/modules
/system/etc/firmware , ppp, security, wifi, permission vold.stab
/system/user/keychars, keylayout
========================
one problem also comes from our recovery mode. unfortunately in our device it was stored inside kernel while in other device it was stored in different place.
Click to expand...
Click to collapse
Right. A Boot image is not completely independent of other partitions