S5L8900

2009-08-15T21:33:54Z

Camerlingue: /* DFU mode */

This is the Application Processor shared between the [[iPhone]], [[N45ap|iPod touch]], and the [[iPhone 3G]]. Not much is known about it through official sources. This processor is not used in any of the newest devices, being replaced by the [[S5L8720]] and [[S5L8920]].

==Firmware File Formats==
See [[S5L File Formats|this page]] for more information on the types of firmware files it interprets

==Exploits==
===[[System|Userland]]===
* [[Restore Mode]] - Firmware v1.0.2 and below
* [[symlinks|Symlinks]] - Firmware v1.1.1 and below
* [[LibTiff|LibTIFF]] - Firmware v1.1.1 and below
* [[Mknod]] - Firmware v1.1.2 and below
* [[Dual Boot Exploit]] - Firmware 1.1.4 / v2.0b3 and below

===[[iBoot]] / [[Kernel]]===
* [[Ramdisk Hack|Ramdisk Exploit]] - Firmware v1.1.4 / v2.0b3 and below
* [[diags|Diags Exploit]] - Firmware v1.1.4 / v2.0b5 and below
* [[iBoot Environment Variable Overflow]] - Firmware 3.1b1 and below

===[[VROM (S5L8900)|Bootrom]]===
* [[pwnage|Pwnage 1.0 (Ramdisk + AppleImage2NORAccess)]]
* [[pwnage 2.0|Pwnage 2.0 (DFU + Malformed Certificate)]]

==Boot Chain==
[[VROM]]->[[LLB]]->[[iBoot]]->[[Kernel]]->[[System|System Software]]

One of the [[iPhoneLinux]] goals are to replace that Boot Chain after iBoot :<br>
[[VROM]]->OpeniBoot->Linux Kernel->X Server->Window Manager

==Upgrade Process==

=== Restore mode ===
The common upgrade process chain is [[VROM]]->[[DFU]]->[[WTF]]->[[iBoot]]->[[Kernel]]->[[Ramdisk]]->[[Restore Mode|Restore]], also called [[Restore Mode|restore mode]].

== DFU mode ==
See full article [[DFU|here]]. To flash an older version of the iPhone software you have to let your phone reside in [[DFU]]. In iTunes you have to press the Alt-Key (Mac) or the shift-key (Windows) when pressing 'Restore' to be able to manually chose an update file (ipsw file).
In Windows you must press ALT key not the shift key!
=== Boot Chain ===
[[VROM]]-->[[DFU]]

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S5L8900