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Difference between revisions of "S5L8920"
(didn't realize i'm on S5L8920.. lol) |
(Chronic and Geohot have been talking about an exploit on twitter they found back in July. It's important to note here that it exists. :)) |
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=== [[iBoot]] / [[Kernel]] === |
=== [[iBoot]] / [[Kernel]] === |
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* [[iBoot Environment Variable Overflow]] - Firmware 3.1b1 and below (Note: [[iBoot]] on the S5L8920 can be downgraded allowing the exploit to be used on future firmwares, but ''only if'' a backup of the device-specific Apple-signed 3.0 iBSS with unique [[ECID]] was made.) |
* [[iBoot Environment Variable Overflow]] - Firmware 3.1b1 and below (Note: [[iBoot]] on the S5L8920 can be downgraded allowing the exploit to be used on future firmwares, but ''only if'' a backup of the device-specific Apple-signed 3.0 iBSS with unique [[ECID]] was made.) |
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| + | * Undisclosed exploit - 3.1 and below. |
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=== [[S5L8920 (Bootrom)|Bootrom]] === |
=== [[S5L8920 (Bootrom)|Bootrom]] === |
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Revision as of 21:00, 10 September 2009
This is the processor used in the iPhone 3GS.
S5L8920 using THUMB-2 instruction set as much as ARM and THUMB ones. So the compiled binaries are not compatible with older CPUs.
Exploits
iBoot / Kernel
- iBoot Environment Variable Overflow - Firmware 3.1b1 and below (Note: iBoot on the S5L8920 can be downgraded allowing the exploit to be used on future firmwares, but only if a backup of the device-specific Apple-signed 3.0 iBSS with unique ECID was made.)
- Undisclosed exploit - 3.1 and below.
Bootrom
Boot Chain
Bootrom->LLB->iBoot->Kernel->System Software
