pinephone_modem_sdk
seL4
pinephone_modem_sdk | seL4 | |
---|---|---|
62 | 60 | |
585 | 4,538 | |
0.5% | 0.9% | |
2.9 | 9.0 | |
about 1 month ago | 8 days ago | |
Python | C | |
GNU General Public License v3.0 only | GNU General Public License v3.0 or later |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
pinephone_modem_sdk
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Hardening Cellular Basebands in Android
Hey, that looks really cool. I've been wanting to mess around with this stuff on PinePhone, which is in a unique position here since there are third-party images for the baseband which are mostly open source[1].
I've been especially interested in trying to reverse engineer what's going on with Google Fi on Android, but it is definitely a bit over my head, given that until recently I didn't even really know what an AT command was :) I'm guessing since it's Google the carrier stuff is mostly for fallback and all of the actually interesting stuff is done using protobufs over a data connection. (Fi is also interesting because you can make phone calls on the web over WebRTC. I wonder if that's some kind of gateway to SIP, or what.)
[1]: https://github.com/the-modem-distro/pinephone_modem_sdk
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Chinese Cellular IoT Radio Modules Pose an Alarming US National Security Risk
Ironically modules made by Quectel are GPL compliant (https://www.quectel.com/quectel-open-source) and you can build custom firmwares for them (https://github.com/the-modem-distro/pinephone_modem_sdk) to strip out any OTA logic.
Fibocom, on the other hand, not so much.
- PinePhone Modem SDK
- The PinePhone modem SDK: a free-software baseband firmware
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This happens more than I'd like to admit.
I have a PinePhone Pro, and I'm trying to figure out a reasonable way to get more than one half of ten minutes of battery life out of it, while still receiving notifications. I figure the best route to go will be to create a service that holds ports open, while the CPU is completely asleep, and either run it on the modem's processor or, as an possibility for the PinePhone Pro, but not the original Pinephone, run it on the m0 core used for power management.
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Pinephone, Pinephone Pro SW Maturity?
At this moment, Mobian on the PPP with the Modem SDK ( https://github.com/the-modem-distro/pinephone_modem_sdk/releases ) and a few tweaks to the sound, the phone is great, the power is managed well, and the camera is usable. So I vote for Mobian Phosh as the current best. None of the OSs available are entirely stable on updates, so you still need to be careful.
- OURphone Is a Fully Open-Source Smartphone Based on Linux
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LTE-Module for Pinebook Pro: Recommendations?
I use this one with my Steam Deck. It uses the quectel eg25, same as pinephone, and can can be used with the fancy custom firmware.
seL4
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From L3 to seL4 what have we learnt in 20 years of L4 microkernels? [video]
> People like to snob Unix but the fact is: the world runs on Unix.
The world you are aware of runs on it.
> Can we really do that much better or is it just hubris?
Yes. Have a look at seL4[1] and Barrelfish too[2], even though that's no longer active. seL4 in particular is powering a lot of highly secure computing systems. There is a surprisingly large sphere outside of Unix/POSIX.
[1] https://sel4.systems/
[2] https://barrelfish.org/
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On the Costs of Syscalls
There are also RTOS-capable microkernels such as seL4[0], with few but extremely fast syscalls[1]. Note times are in cycles, not usec.
0. https://sel4.systems/
1. https://sel4.systems/About/Performance/
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Can the language of proof assistants be used for general purpose programming?
https://sel4.systems
Working on a number of platforms, verified on some. Multicore support is an ongoing effort afaict.
On OS built on this kernel is still subject to some assumptions (like, hardware working correctly, bootloader doing its job, etc). But mostly those assumptions are less of a problem / easier to prove than the properties of a complex software system.
As I understand it, guarantees that seL4 does provide, go well beyond anything else currently out there.
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How to write TEE/Trusted OS for ARM microcontrollers?
Take a look at this: https://sel4.systems/
- Simulation: KI-Drohne der US Air Force eliminiert Operator für Punktemaximierung
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Paragon Graphite is a Pegasus spyware clone used in the US
It's probably have to be seL4 (https://sel4.systems), running on some fully OSS hardware.
There are question marks over much of available RISC-V chips due to chinese producers, so maybe OpenPower based hardware?
Plus, the entire system (motherboard, etc) would need to be manufactured using a good supply chain.
Hmmm, this has probably all been thought through in depth before by others. :)
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Basic SAT model of x86 instructions using Z3, autogenerated from Intel docs
You can use it to (mostly) validate small snippets are the same. See Alive2 for the application of Z3/formalization of programs as SMT for that [1]. As far as I'm aware there are some problems scaling up to arbitrarily sized programs due to a lack of formalization in higher level languages in addition to computational constraints. With a lot of time and effort it can be done though [2].
1. https://github.com/AliveToolkit/alive2
2. https://sel4.systems/
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What are the current hot topics in type theory and static analysis?
Formal methods. This is not in most general-purpose programming languages and probably never will be (maybe we'll see formal methods to verify unsafe code in Rust...) because it's a ton of boilerplate (you have to help the compiler type-check your code) and also extremely complicated. However, formal methods is very important for proving code secure, such as sel4 (microkernel formally verified to not have bugs or be exploitable) which has just received the ACM Software Systems Award 3 days ago.
- Rust Now Available for Real-Time Operating System and Hypervisor PikeOS
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Amiga and AmigaOS should move to ARM.
Today we'd look at seL4.
What are some alternatives?
waydroid - Waydroid uses a container-based approach to boot a full Android system on a regular GNU/Linux system like Ubuntu.
l4v - seL4 specification and proofs
droidian - Droidian's wiki
fprime - F´ - A flight software and embedded systems framework
hackrf - low cost software radio platform
nomicon - The Dark Arts of Advanced and Unsafe Rust Programming
hologram-python - Hologram device-side Python SDK - Send messages to the cloud in just 3 lines of code!
CompCert - The CompCert formally-verified C compiler
nova-hardware - Hologram Nova Hardware
InitWare - The InitWare Suite of Middleware allows you to manage services and system resources as logical entities called units. Its main component is a service management ("init") system.
construct - This is The Construct
4.4BSD-Lite2 - 4.4BSD Lite Release 2: last Unix operating system from Berkeley