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By optimizing my kernel I have found a bug, my mouse module, which runs at ring 3 suddenly started "crashing", it gave me a pagefault. That's because its codesize is bigger than one page. All my other modules are less than one page big. So I guess the processor doesn't check the tlb for the first page when iret-ing, expecting the code to be both present and be of the correct ring-space, hence the "considered harmful" famous quote?
As you see, Im just an hobbyist trying figurying things out.

I have just found the bug, it has nothing to do with whatever I have said. Sorry to mislead you. The bug was that the code wasnt aligned to a page boundary because of my silly filesystem!

This is *not* the correct subforum for bugs in your kernel. Try OS Development.

JamesM wrote:This is *not* the correct subforum for bugs in your kernel. Try OS Development.

I will be more careful about that.


About the bug I supposedly corrected, it's still here. Im envisaging switching to ELF for my binaries, right now im just using plain vanila binaries which are statically linked with a.o , the C library.