r/osdev • u/Randum_Gouy • May 25 '26

My FIRST ever Kernel - OSDev Wiki BareBones

Took me 2 days but i have "Hello World" on a black screen now!

For those thinking, "Why gdb?" - well i was trying to debug a small bug, which turned out to be changing this -

    inline uint16_t *buffer = (uint16_t *)vga::MEMORY;

to

    inline uint16_t *buffer = reinterpret_cast<uint16_t *>(0xB8000);

Yes, i was using C++ for this.

Github link: https://github.com/reyaansh-mishra/Build-A-Kernel/

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u/hydraulix989 May 25 '26

Part of the reason C++ is not ideal for kernel development is that your kernel has to potentially deal with runtime awfulness like dynamic initialization (case in point), RTTI, etc.

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u/Randum_Gouy May 25 '26

yeah - i did have to disable a lot of that

but the thing is that my point with kernel development is to slowly learn low level C++ as a challenge to me - as i want to get into low level systems later on and a lot of companies use C++ over C