Linux on the iPhone

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These are utility binaries precompiled on Ubuntu 8.10. They require:

- libpthread
- libncurses
- libusb
- libreadline

You may elect to build them from source by pulling from
iphonelinux/openiboot's git repository.

REALLY SUPER IMPORTANT, PLEASE DON'T JUST JUMP OVER THIS SECTION
----------------------------------------------------------------

BE WARNED THAT THESE STEPS ARE NOT INTENDED FOR NOVICES. YOU ATTEMPT THIS AT
YOUR OWN RISK. AT THIS TIME, WE CANNOT AFFORD THE EFFORT REQUIRED TO GIVE
SUPPORT TO NOVICES AND/OR RESCUE THEM FROM THEIR OWN ACTIONS.

Although unlikely, if the installation goes wrong, you may have to perform a
DFU restore on your iPhone. If you do not know how to do that, you should not
follow these steps. You should also know how to use iRecovery (or similar) and
the fsboot command to "kick an iPhone out of recovery mode". If you do not
know how to do that, you should not follow these steps.

The installation of openiboot itself is safe, but openiboot has the facility
to erase device-specific information from your NOR flash. If you did not make
a backup, and execute the commands necessary to make openiboot erase that
information, it is gone forever and your device may never boot properly again.

The instructions below will show you how to make such a backup before any
changes are made.

INSTALLING OPENIBOOT
--------------------

1. Put your iPhone in Recovery Mode
2. sudo ./loadibec openiboot-2g.img3
- Or -3g, -ipod, depending on your platform.
3. sudo ./oibc
4. nor_read 0x09000000 0x0 1048576
5. ~norbackup.dump:1048576
- This will create a file called norbackup.dump in your
current directory. GUARD IT WITH YOUR LIFE.
6. install
7. After 'install' has finished, type in: reboot.
8. You ought to see the openiboot menu.

BOOTING LINUX
-------------

1. Use the Hold button to navigate the menu. Push the Home button
when openiboot client is selected.
2. sudo ./oibc
3. !zImage
4. kernel
5. !rootfs.arm.ext2.gz
6. ramdisk 3588
7. boot "console=tty console=ttyUSB root=/dev/ram0 rw"
8. sudo ./linux

You should now get a login prompt. Nothing that's happening will show up on
the LCD automatically, but you can redirect it to the display with the
following command:

9. sh 2>&1 > /dev/tty0

Enjoy!