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25 lines
1.5 KiB
Markdown
25 lines
1.5 KiB
Markdown
# [Op6TSlot](https://github.com/longjunyu2/Op6TSlot)
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Add A/B slot support for OnePlus 6T EFI-EDK2 firmware.
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## Introduction
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  The OnePlus 6T device uses the A/B slot mode proposed by AOSP. Each time it is started, the bootloader checks if the current slot is available or switches if not.
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Therefore, when we use a non-Android system, bootloader will assume that the current slot used is damaged and switch between the slots, since the slot status cannot be updated.
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When the same thing happens in another slot, bootloader forces it into fastboot.
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  This UEFI Application module is designed to automatically update the slot state after entering UEFI firmware, without requiring an OS level solution to this problem.
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  [Implementing A/B Updates](https://source.android.com/devices/tech/ota/ab/ab_implement)
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  [About GPT](https://uefi.org/sites/default/files/resources/UEFI_Spec_2_9_2021_03_18.pdf)
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## Current Status
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- [x] Find the disk with the flag.
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- [x] Write Slot flag(Active/Bootable/Unbootable) to the disk
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- [x] Read GPT partition entry
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- [x] Generating CRC32 code for GPT partition entry
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- [x] Write the CRC32 code of GPT partition entry to the specified position
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- [x] Read the first 92 bytes of the GPT header
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- [x] Generating CRC32 code of GPT header
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- [x] Write the CRC32 code of GPT header to the specified position
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- [x] Has the problem been solved?
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## License
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The software is distributed under GPL v3 with additional terms.
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