DISCLAIMER: These notes are from the defunct k8 project which precedes SquirrelJME. The notes for SquirrelJME start on 2016/02/26! The k8 project was effectively a Java SE 8 operating system and as such all of the notes are in the context of that scope. That project is no longer my goal as SquirrelJME is the spiritual successor to it.


I can write a k8 simulator which runs on host systems such as Linux by loading the recompiled class code, setting up a few things and then calling into the loaded code. Requires memory protection changing however, but it may work. Doing it this way, I could sort of use gdb in assembly mode to debug programs and possibly run stuff as needed. Due to the way code is generated (at least for PowerPC) it is a very dynamic structure which does not generate any internal system calls. So it may be a bit slower in a few cases when not using those, but this allows the eventual k8 OS to do better native binding and even potential replacement methods which essentially just rewrite pre-existing functionality (which may be useful for certain situations).


Will have to remember to clear slot values at the start of a method, otherwise old illegal values could be used and such.


sloccount gives me the following (in vmjar):

java:        299908 (99.44%)
ansic:         1268 (0.42%)
sh:             414 (0.14%)
asm:             18 (0.01%)

Some of that is code I wrote, the bulk of it is auto-generated class library code.