After months of research and development, both hardware and software... I'm happy to announce UnBrickable Mod is a matter of modifing your phone once, with a single small wire. From that point on, you can click a button to unbrick. This can even be applied to a phone which is already bricked.
This is an example from the Captivate. The procedure is the same on the Vibrant.
- You Must have UnBrickable Mod applied to your device. If you're not sure, run this tool under Linux: http://forum.xda-developers.com/show....php?t=1257434
- This currently only works for Linux based computers or Windows based computers with proper drivers installed, with a Linux Virtual Machine, Get Ubuntu here: http://www.ubuntu.com , Get Virtualbox Here: http://www.virtualbox.org/wiki/Downloads
- You must have Java installed on your computer: http://www.java.com/en/download/
1. Apply UnBrickable Mod to your device:http://forum.xda-developers.com/show....php?t=1273083
2. Run UnBrickable Resurrector: Get it from THIS POST: http://forum.xda-developers.com/show...7#post17135277 This will only work on linux currently. Install Linux or dual boot if you have windows.
3. Run Heimdall One-Click http://forum.xda-developers.com/show....php?t=1278683
4. repeat steps 2 and 3 with bootloader flashing enabled (Heimdall One-Click has a safety mechanism which requires you to flash once before flashing bootloaders).
You've unbricked the unbrickable captivate... This should not have been difficult. If it was, you should learn teh computer better... Really. And with that said, I'm happy to announce that you no longer have to flash with a fear of bricking.
The HIBL is the key to resurrecting a S5PC110 based processor. I'm going to let Rebellos explain the inner workings of the Hummingbird Interceptor Bootloader. It's really quite amazing. While my work is more hardware and high level tasks like making things into one-clicks, Rebellos' work involves reverse software engineering, assembly language, and more...
Okay, so, what is Hummingbird Interceptor Boot Loader (HIBL)?
Basically: It allows to load any amount of data (limited by size of RAM block, the biggest one single block available is 256MB) through USB connection with PC under any specified address into memory and then execute it.
Technically: It does consist of 2 pieces fused together - BL1_stage1 and BL1_stage2.
Each stage starts from 16bytes (4 ARM WORDs) of secure boot header. In stage1 these are mandatory, in stage2 they can be random (nulled them in my code), so EntryPoint of each stage does start at its 0x10 offset.
BL1_stage1, loaded under 0xD0020000 address, is short code, digitally signed by Samsung. It has been released to break "Chain of Trust" and alter Secure Boot into Non-Secure Boot process. Literally stage1 just do some compare operations and then jumpout to BL1_stage2. (Yes, I also see no point of releasing hardware secured CPU version together with software which is bypassing it's security)
BL1_stage2, must be placed at 0xD0022000 address (it's fused together with stage1 into HIBL, so it's at 0x2000 offset of HIBL.bin) it is unsigned because Secure Boot Context, prepared by iROM (BL0) has been already ignored by stage1.
Its FASM_ARM sourcecode:
This is where the code start real work, it does begin with standard ARM core jump vector table (just to keep stick to standard, these aren't used anyway).
1. It does use I9000 BL1_stage2 functions (init_system) which I linked to it, these are used to init DMC controllers, as to this point code is executing in and working with very tiny, 96KB iRAM space, after calling this function it turns all 512MB of RAM available.
2. Make sure DMC is configured properly (write some value to address 0x40~~ memory space, then read it and compare with previously written)
3. Reinit iRAM heap to the BL0 initial state (to convince it USB dload mode haven't been called yet), by storing and restoring UART pointer only (to keep debug output flowing properly)
4. Call iROM usb_downloader function.
5. Read the address where downloaded data has been placed.
6. Jump into this address.
This, properly used provides similiar debug output (similiar, because its outdated testlog)
�������������������������������������������������� ���������������������� Uart negotiation Error ---------------------------------------- Hummingbird Interceptor Boot Loader (HIBL) v1.0 Copyright (C) Rebellos 2011 ---------------------------------------- Calling IBL Stage2 DONE! Testing BL3 area DONE! iRAM reinit DONE! Please prepare USB dltool with BL3 Starting download... 0x00000000 Desired BL3 EP: 0x40244000 Download complete, hold download mode key combination. Starting BL3... //OUTPUT BELOW IS COMING FROM SBL Set cpu clk. from 400MHz to 800MHz. IROM e-fused - Non Secure Boot Version.
Windows32 command line app and drivers http://forum.xda-developers.com/atta...2&d=1315091521 (doesn't work very well... just want you to know this)
Linux one-click Resurrector: http://forum.xda-developers.com/atta...2&d=1315349672