Bootrom Dumper Utility

Credit
Pod2g

Geohot for limera1n

Info / Instructions

 * you need a mac or linux box to use it / build it
 * libusb > 1.0.8 required
 * execute it with root privileges (sudo ./bdu)
 * by default compatible only with A4 devices: (iPhone 4, iPod 4G, iPad, AppleTV 2)

It's possible to extend the compatibility to older devices as well (iPhone 3GS, iPod 3G) by changing:
 * the offset to the call of usb_wait_for_image in payload.S

0x7ef @ A4 devices: iPad 1, iPhone 4 (GSM+CDMA), Apple TV 2G, iPod touch 4G 0x8b7 @ iPod touch 3G 0x8b7 @ iPhone 3GS new bootrom 0x8b7 @ iPhone 3GS old bootrom 0x8b7 @ iPod touch 2G new bootrom (0x30F1 according to other sources) 0x8b7 @ iPod touch 2G old bootrom (0x30E9 according to other sources)


 * exploit offsets in bdu.c

// A4: // iPod touch 2G: // iPod touch 3G: // iPhone 3GS new bootrom:
 * 1) define EXPLOIT_LR 0x8403BF9C
 * 2) define LOADADDR_SIZE 0x2C000
 * 1) define EXPLOIT_LR 0x22000000
 * 2) define LOADADDR_SIZE 0x24000
 * 1) define EXPLOIT_LR 0x84033F98
 * 2) define LOADADDR_SIZE 0x24000
 * 1) define EXPLOIT_LR 0x84033FA4
 * 2) define LOADADDR_SIZE 0x24000

Links
Github