View on GitHub


Test Coverage
# 2014/10/05

***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._

## 12:08

Hairball could be useful if it is a script based system where I can write my
own complicated scripts that are similar to the language itself. However,
there should just be platform definitions and such, where hairball just does
all of that automatically as needed. It can also perform specific runtime
compilation also through the runtime system that I will write. The major thing
is I have to code the runtime system right and once. So what will be the scope
of the runtime system then? Does it just do compilation of code as needed?
Does it execute and interpret code at all? I believe the runtime should just
perform compilation of code and such, while I can have separated kernel stuff
as needed. For the kernel I can have tons of packages for separate
architectures or I can combine them as one. Multiple architectures simplifies
things and the package builder can just set some subpackages like they do not
exist at all.

## 12:25

However, keeping all of the code in one singular package for every
architecture and such will complicate the build process because that would
need to handled. Putting all of the kernel packages in the standard pkg
directory will be messy, so I will put them all in a new directory, kpkg. I
know previously I have merged these, but pkg will be userspace and kpkg will
be kernel space, and that is a huge difference in function. Putting them all
in the same directory will make it difficult to determine what is a kernel
package and what is a userspace package.

## 12:30

Now I need an execution system. How will binaries be loaded and handled? I
want the execution system to act as if it were on the end of a compiler, so if
there is a method call to somewhere it will act as if it were an actual method
call of sorts. So when a class is loaded, it will just be recompiled into some
native form by running through it and such. Then once it exists in memory it
can be directly jumped into. So I will need some kind of system where I can
wrap native execution via some virtualized native call and such.

## 13:42

I will need a good ahead of time compiler that can be used when the kernel is
being compiled and while the kernel is executing (for user code), so it must
be efficient although it does not have to be super fast (since compilation is
done once and cached, ignoring anything that changes which would require
recompilation). It also must have toggleable code generation so the primary
package is not used in a special way, that is normal userspace code being
recompiled cannot access the very special stuff in that package.