I got Linux running in a PDF file using a RISC-V emulator. PDFs support Javascript, so Emscripten is used to compile the TinyEMU emulator to asm.js, which runs in the PDF. It boots in about 30 seconds and emulates a riscv32 buildroot system. linux.doompdf.dev/linux.pdf github.com/ading2210/li... - ThreadSky

I got Linux running in a PDF file using a RISC-V emulator.

PDFs support Javascript, so Emscripten is used to compile the TinyEMU emulator to asm.js, which runs in the PDF. It boots in about 30 seconds and emulates a riscv32 buildroot system.

https://linux.doompdf.dev/linux.pdf
https://github.com/ading2210/linuxpdf

Comments

jcsalterego.bsky.social•86 days ago

your scientists were so preoccupied with whether or not they could

bernon.fr•85 days ago

Sooo the next question is probably : can it run doom ?

edoyen.com•85 days ago

It can: https://github.com/ading2210/doompdf

bernon.fr•85 days ago

I know for the pdf file itself, I was asking for the JavaScript - linux kernel inside the pdf file !

edoyen.com•85 days ago

aaah! Well that's definitely an interesting question. Very curious to know the answer too lol. Theoretically I guess it's possible but the performance may not be very good

tpo-asd.bsky.social•85 days ago

📌

badbanjo.bsky.social•3 days ago

darkglade.bsky.social•85 days ago

Truly cursed *tips hat*

alsciende.bsky.social•85 days ago

Extremely cool!

amias.net•85 days ago

Very impressive, you made it sound easy but I bet it wasn't

grant-faulkner.com•85 days ago

I have only the faintest idea of what this means but it looks awesome nonetheless

marsdude.eu•3 days ago

derand.bsky.social•86 days ago

Hey that's pretty cool. If you enjoyed the process, why not. Do you have any info on what type of security risks this poses? Does PDF software run the JavaScript in a container or something like a container?

ading.dev•84 days ago

I personally think the security risk with this is minimal. Chrome runs the JS in PDFs in a very limited version of V8 (without a JIT compiler or WASM support), so the JS interpreter should be pretty secure. The JS APIs are also super limited so there's not a whole lot a bad actor can do.