S5L8920

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Revision as of 15:12, 17 July 2009 by Dialexio (talk | contribs) (iBoot / Kernel: S5L8920 information is about the S5L8920.)
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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.)

Bootrom

Boot Chain

Bootrom->LLB->iBoot->Kernel->System Software

See also