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Philipp Oppermann
2020-01-28 16:03:41 +01:00
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blog/content/second-edition/posts/06-double-faults/index.md
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@@ -4,6 +4,8 @@ weight = 6
path = "double-fault-exceptions"
date = 2018-06-18
[extra]
chapter = "Interrupts"
+++
This post explores the double fault exception in detail, which occurs when the CPU fails to invoke an exception handler. By handling this exception we avoid fatal _triple faults_ that cause a system reset. To prevent triple faults in all cases we also set up an _Interrupt Stack Table_ to catch double faults on a separate kernel stack.