Building:
cd cse451/os161
./configure --ostree=$HOME/cse451/root
cd kern/conf
./config ASST1    # Configure to the kernel you want
cd ../../compile/ASST1
bmake depend		# Header file stuff
bmake				# Compile the code
bmake install		# Move to root directory
cd ../root
sys161 kernel 		# Run the kernel

Parts of the codebase:
common/libc -- code common to all kernel and user mode
kern -- kernel code
	kern/arch -- architecture specific code
		mips/locore/exception-mips1.S and trap.c
		mips/syscall.c
	kern/include and kern/include/kern -- header files with comments
	kern/lib -- data structures (unsynchronized)
	kern/main
		kern/main.c -- code that runs on start up
		kern/menu.c -- code for menu
	kern/proc/proc.c -- code that defines a process for later projects
	kern/syscall -- system calls
	kern/vfs -- virtual file system calls
	kern/vm -- dumbvm calls
userland -- user level programs, built separately from the kernel
	userland/testbin -- user level test code for system calls
run a test

Running gdb:
two terminals on the machine
with the first run:
	sys161 -w kernel
with the second run:
	cse451-gdb kernel
	target remote unix:.sockets/gdb