os-tutorial VS 64bit-os-tutorial

How to create an OS from scratch

My dude. Your functions have exactly the same names as his. Copying it from a different tutorial based on James Molloy's tutorial does not make it any less James Molloy's code.

I started out with this tutorial: https://github.com/cfenollosa/os-tutorial. It doesn't get you too far but it explains the basics very well, so check it out. After that I looked up James Molloy's kernel tutorials (look it up on Google, it's all on a website). Be advised that he's got a bunch of errors and bugs in the tutorial, there is a whole page on it on the osdev wiki titled known bugs in the JamesM kernel all something like that, but it's still great and gets you pretty far. After that, I chose to develop a FAT32 driver on my own, I can link some sources or my own code for you as well, but it's really up to you to follow what you like. I also found a great youtube series (https://youtube.com/@poncho2364?feature=share9), check out his osdev series, he also has some cool stuff there. And as I said, good luck on your journey and you can ask me in a DM as well if you get stuck somewhere!

tutorial : here

Yeah, I'm following cfenollosa's OS tutorial for guidance. You mentioned that you've seen the same code, with the same bug? What was the solution there?

hey, just in case you actually want to write an operating system, you should check out cfenollosa/os-tutorial: How to create an OS from scratch, it is an amazing tutorial that will get you from basic printing all the way to a command line interface!

You might be able to sink your teeth into something like this if you're interested in real os development, haven't got far myself but it's fun and you'll learn a lot https://github.com/cfenollosa/os-tutorial

So I made a 16-bit x86 toy OS in pure assembly. 3 months ago, I found a very fun tutorial on github that is about Operating system development. I read the first few chapter and from there I made a very simple, extensible (?) toy operating system that could run on hardware (yes, it is madness).

So I have been following this tutorial on writing a 64-bit OS from scratch. At this point, they show how to build and link to a basic C kernel, which is all good, but I would rather write it in C++. However, after trying to modify the makefile to compile C++ files (by changing the compiler to clang++ and changing all the .c to .cpp), as well as putting extern "C" in front of the main() function , I get an error from ld saying ld.lld: error: undefined symbol: main. I understand that there are things lacking in my build process, but I can't find which ones; is it some flags I am missing, or a more involved set of build commands ? I really would like to stick to clang/LLVM, if possible, rather than cross-compiling with GCC.

I found this github repo very helpful, it is a basic x86_64 bootloader and a simple main function. I liked it because it is just something working that get's you going, it's also very good documented and from there you can start adding your own things.

I’ve already made a tutorial you can follow here: https://github.com/gmarino2048/64bit-os-tutorial. I’m still in the process of updating it and would appreciate any feedback.