Tag: OS

Chapter 2 — GDT, IDT, and Surviving Your First Kernel Crash

Posted By: R. MorganPosted On:
Chapter 2 — GDT, IDT, and Surviving Your First Kernel Crash
This entry is part 2 of 2 in the series Writing A Linux Style Operating System From Scratch

In Chapter 1, we got control of the machine: Now we need something more important than printing text: we need the CPU to call our code when something goes wrong. Right now, if the kernel executes an invalid instruction, divides by zero, touches unmapped memory later, or faults during setup, the machine may reset, hang,

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