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<f_>
ok so I got pmOS booting on the tv stick
<f_>
I was going to have a look at mmcblk1boot0 when I noticed... no @AML header?
<f_>
And no AMLC header?
<f_>
This is a secureboot-enabled device ... so I guess it's all encrypted
<phh>
I can check, but I seemed to remember the @AML header was still there
<phh>
you're sure it's not in mmcblk1 directly?
<f_>
I checked boot1 and it's not there either.
<f_>
Same thing in mmcblk1
<f_>
yes, I expected at least a little header too
<f_>
Instead all I see is "gibberish"
<f_>
put in quotes, since the stick does boot :p
<f_>
I'm pretty sure it boots from eMMC, too. The UART logs aren't intentionally mangled (like on some ZTE device...) and besides, eMMC is all the stick has
<f_>
I'll admit it's my first time I actually deal with a secureboot-enabled amlogic device... ;p
<phh>
hum yeah i said i would send you one with the keys
<f_>
Another strange (to me) thing is the device currently has Android 10 ...... I always thought Amlogic didn't support anything newer than Pie on gxl..
<f_>
phh: oh, that would be cool.
<f_>
Even though I think my tv stick might be vulnerable to a bootROM USB mode bug thing that could let me run unsigned code
<phh>
wrt android 10 on gxl, all i can say is that i have an android 10 bsp from amlogic that didn't remove all gxl code
<f_>
interesting
<f_>
Ironically I'm glad Xiaomi made the switch bevause they accidentally re-enabled u-boot shell over UART :D
<f_>
because*
<phh>
:)
<f_>
yep basically they exposed a u-boot shell over uart in early Android 9 days. Then they disabled it in an upgrade. And now that they switched to A10 it got enabled again :p
<f_>
And even in Android 9 when they disabled it, you could still run commands via "fastboot oem"
<phh>
well "modern" amlogic still allows you with "adnl bulkcmd"
<f_>
Even with secureboot?
<phh>
yes
<f_>
hah
<f_>
I have to try
<phh>
yes, it passes all security certifications and all
<phh>
but developers still need backdoors to debug at the end of the day :s
<f_>
challenge: use u-boot shell but no stdout
<f_>
Anyway. I might dump boot0/boot1 to take a closer look later
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