cs161/chickadee

Chickadee OS for Harvard CS 161

chickadee's Issues

panic() relies on initially unmapped console

The base code has a number of calls to panic() but these all result in a page fault for 0xb8e60 (the low canonical address for part of the console) attempting to write a missing page. It seems that while page fault is implemented in the kernel, so can write to the console, panic() is implemented as a user-mode function so does not have access to the console (until that feature has been added).

Would it make sense to convert panic() to a kernel function?

Update chickadee.gdb with CHICKADEE_FIRST_PROCESS

While it is possible to select CHICKADEE_FIRST_PROCESS using an environment variable or a command-line option, the debugger is configured to always add the symbol file for p-allocator.cc. This makes it difficult to debug alternate applications. It would be nice if the mechanism that substituted a different first process could also update the debugging configuration.

How long should 'make run' take?

I've started it on two different machines. After about 40 hours of 100% CPU the '@' counter is at 13 million. What is the end state number? Did a delay accidentally get put into the releases?