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Reading the protected framebuffer - Linux, Android

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http://stackoverflow.com – Platform : Arm CPU, Android Jellybean - Linux 3.4(customized for Android) Project : A debug tool collecting various dumps on a system crash. Work so far : Using Ion memory (available from ICS), i am collecting the complete dump on a soft reboot resulting from system crash. Problem : I want to store the screenshot at the time of crash. On system boot, in dmesg, the framebuffer driver mentions an address that is being used for display. On crash i want to capture the data from here. But the problem is i am not able to read the data from this location. Even in Trace32, even before crash when i (HowTos)