S5L8930

An SoC developed by Apple in-house chip design department. It is currently used in iPad, iPhone 4, Apple TV 2G, and iPod touch 4G. Publicly, Apple refers to this chip as the A4.

Exploits

Bootrom

• Geohot used a bootrom exploit in limera1n that does not have publicly released technical details.
• SHAtter

iBoot

• Unreleased Untethered iBoot Exploit

Kernel

• BPF STX Kernel Write Exploit - Works up to iOS 3.2
• IOSurface Kernel Exploit - Works up to iOS 4.0.1 (excluding iOS 3.2.2)
• Packet Filter Kernel Exploit - Works up to iOS 4.1
• HFS Legacy Volume Name Stack Buffer Overflow - Works up to iOS 4.2.6

Userland

• MobileBackup Copy Exploit - Works up to iOS 3.2
• Malformed CFF Vulnerability - Works up to iOS 3.2.1 (and iOS 4.0 and 4.0.1)

Boot Chain

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

Specifications

• CPU: ARM Cortex-A8
• GPU: PowerVR SGX 535
• A/V Playback: PowerVR VXD
• RAM: 256 MB (Apple TV 2G, iPad, and iPod touch 4G) or 512 MB (iPhone 4)

Aside from the iPhone 4's additional RAM and an overall higher clock speed, these are the same specifications as the S5L8920 and S5L8922.

See also

• S5L8930 (Bootrom)

Links

• http://www.apple.com/ipad/specs/
• http://www.brightsideofnews.com/news/2010/1/27/apple-a4-soc-unveiled---its-an-arm-cpu-and-the-gpu!.aspx