TPLINK Archer C9 v5 unlock the protection

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libmuy
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PostPosted: Fri Nov 19, 2021 16:07    Post subject: TPLINK Archer C9 v5 unlock the protection Reply with quote
I know there is a protection in the v5.
Wonder if it is possible to unlock the protection by write a V4's mtd0(CFE) to V5's mtd0?
they have same SoC, I think mybe it work..
I have the serial console, considering trying... is it possible?
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kernel-panic69
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PostPosted: Fri Nov 19, 2021 18:03    Post subject: Reply with quote
The C9 v5 uses a bootloader to load an image which contains a second bootloader. It's not about unlocking anything. It's about how to work with the way the flash is laid out. AFAIK, the serial only sees the Broadcom CFE, and not the underlying bootloader. I don't know if BrainSlayer has made any progress on the v5 he has in hand, but for now it's a dead horse until he finds the mood and time to work on it.
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libmuy
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PostPosted: Sat Nov 20, 2021 3:22    Post subject: Reply with quote
kernel-panic69 wrote:
The C9 v5 uses a bootloader to load an image which contains a second bootloader. It's not about unlocking anything. It's about how to work with the way the flash is laid out. AFAIK, the serial only sees the Broadcom CFE, and not the underlying bootloader. I don't know if BrainSlayer has made any progress on the v5 he has in hand, but for now it's a dead horse until he finds the mood and time to work on it.


thanks for your reply.
I have anaylized the boot log.
It seems the second CFE resides in the rootfs partition(flash0.os which is mtd3 in linux).
So I think the first CFE is in the boot partition(mtd0).
The first CFE will load second CFE. If replace the first CFE(and replace the rootfs partition with the dd-wrt firmware) maybe boot the dd-wrt firmware.



archer_c9v5_boo_log.txt
 Description:
archer c9v5 serial booting console log

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 Filename:  archer_c9v5_boo_log.txt
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kernel-panic69
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PostPosted: Sat Nov 20, 2021 18:53    Post subject: Reply with quote
This is information the developer *already* has, as he has a device in hand. And seeing the boot log clarifies things for me as described by BrainSlayer. Just realized the support topic is locked, hence your opening a new topic to discuss things already known, to push for support. It's not going to happen until BrainSlayer decides to do it, or someone submits the patches to port the device...
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libmuy
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PostPosted: Mon Nov 22, 2021 7:14    Post subject: Reply with quote
Thank you, maybe I should give up challenging this myself.
kernel-panic69
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PostPosted: Mon Nov 22, 2021 16:47    Post subject: Reply with quote
I wasn't saying that he refused input on porting this from the community. But last I knew, this port wasn't going to happen, and then we were discussing the US-only v4 and he alluded to the possibility of porting it. I still have to get him a flash dump of the v4 on my bench.
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