基于arm的Android开发板初探

工具：okteta

把分区信息dump出来：

dd if=/dev/block/mmcblk0 of=/data/gpt.bin bs=512 count=100
dd if=/dev/block/mmcblk0boot0 of=/data/boot0.bin bs=512
dd if=/dev/block/mmcblk0boot1 of=/data/boot1.bin bs=512

用okteta打开gtp.bin，可以看到EFI PART的字样，证明是gpt分区无疑。

再使用dumpgtp.py来dump分区信息：

Found a main GPT header
signature= EFI PART
signature: 'EFI PART'
revision: 0x00010000
headerSize: 92
headerCRC32: 0xE21C882C
reserved: 0x00000000
currentGPTLBA: 1
anotherGPTLBA: 30535679
firstUsableLBA: 34
lastUsableLBA: 30535679
diskGUID: f9f21fff-a8d4-5f0e-9746-594869aec34e
partEntryLBA: 2
partEntryNumber: 128
sizeOfPartEntry: 128
partEntryCRC: 0xACC3B9E6

Parition Name        firstLBA      lastLBA     partSize     MB attribute         
ubootenv                 2048        10239      4194304     4M 0x0000000000000000 ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 f9f21f00-a8d4-5f0e-9746-594869aec34e
deviceinfo              10240        11263       524288     0M 0x0000000000000000 ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 f9f21f01-a8d4-5f0e-9746-594869aec34e
misc                    11264        12287       524288     0M 0x0000000000000000 ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 f9f21f02-a8d4-5f0e-9746-594869aec34e
splash                  12288        28671      8388608     8M 0x0000000000000000 ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 f9f21f03-a8d4-5f0e-9746-594869aec34e
systeminfo_ro           28672        45055      8388608     8M 0x0000000000000000 ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 f9f21f04-a8d4-5f0e-9746-594869aec34e
systeminfo_rw           45056        61439      8388608     8M 0x0000000000000000 ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 f9f21f05-a8d4-5f0e-9746-594869aec34e
boot                    61440       126975     33554432    32M 0x0000000000000000 ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 f9f21f06-a8d4-5f0e-9746-594869aec34e
recovery               126976       192511     33554432    32M 0x0000000000000000 ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 f9f21f07-a8d4-5f0e-9746-594869aec34e
recovery_bak           192512       258047     33554432    32M 0x0000000000000000 ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 f9f21f08-a8d4-5f0e-9746-594869aec34e
system                 258048      1830911    805306368   768M 0x0000000000000000 ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 f9f21f09-a8d4-5f0e-9746-594869aec34e
cache                 1830912      2879487    536870912   512M 0x0000000000000000 ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 f9f21f0a-a8d4-5f0e-9746-594869aec34e
userdata              2879488     30535679  14159970304 13504M 0x0000000000000000 ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 f9f21f0b-a8d4-5f0e-9746-594869aec34e

最后，附上gpt 的wifi地址：https://en.wikipedia.org/wiki/GUID_Partition_Table